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solvecraft/harness/cpp/shim/surface_surface_p10.cpp
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Alex Lytvynenko 7151d1aa55 Carry reviewed offset part 1 fixes and current dependencies into part 2 
Co-Authored-By: GPT-6.1-Sol <noreply@openai.com>
2026-10-18 01:03:20 +02:00

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// SPDX-License-Identifier: Apache-2.0
// difftest shim for unit `surface.surface_p10`: SmLSIGlobalSolver::LocalSolve and
// sm_GlobalCurveIntersectCombineSolutions (source/SMLib/src/SmSurface.cpp).
//
// SmLSIGlobalSolver is a class local to SmSurface.cpp with external linkage: its declaration is
// reproduced here (SmSurface.cpp lines 17885-17932) and the library's constructor and LocalSolve
// are called. The solver runs on a hand-built surface cache tree (as the
// intersect.surface_silhouette shim builds them; tree construction belongs to unit
// surface.surface_cache_p3): patch nodes with their domain, box, continuities, node class,
// optional polar box and pseudo box; every mBA_pSurface is the cache surface.
//
// sm_GlobalCurveIntersectCombineSolutions is file-static, so it is a VERBATIM copy of upstream
// SmSurface.cpp (commit c9c5979, lines 15517-16945) inside the namespace sc_srf_p10. The static
// sm_ClassifyCurveSurfaceXSectPoint it calls (and its helper sm_ConvertToParameterDelta) is
// copied verbatim from upstream as well (lines 13053-13773, as in the surface_p4 shim).
//
// One entry point, sc_surface_surface_p10_run(in, n_in, out, cap, out_len). The program layout
// is documented in crates/solidcore-ffi/src/units/surface_surface_p10.rs, which validates every
// input; reads are bounds checked here too (a bad program is SC_ERR_ARG).
#include "sc_shim.h"
#include "StdAfx.h"
#include <SmBSplineCurve.h>
#include <SmBSplineSurface.h>
#include <SmContext.h>
#include <SmCurve.h>
#include <SmCurveCache.h>
#include <SmExtent1d.h>
#include <SmExtent2d.h>
#include <SmExtent3d.h>
#include <SmGeomUtility.h>
#include <SmGlobalSolver.h>
#include <SmLine.h>
#include <SmLocalSolveNd.h>
#include <SmMatrix.h>
#include <SmNurbsCrv.h>
#include <SmNurbsSrf.h>
#include <SmPlane.h>
#include <SmPolarBox.h>
#include <SmPseudoBox.h>
#include <SmSolutionArray.h>
#include <SmSurface.h>
#include <SmSurfTypes.h>
#include <SmSurfaceCache.h>
#include <SmTol.h>
#include <SmTArray.h>
#include <SmTree.h>
#include <SmVector2d.h>
#include <SmVector3d.h>
#include <nurbs.h>
#include <stdexcept>
#include <vector>
#include "sc_sm.h"
using sc::st;
// ---- SmSurface.cpp lines 17885-17932: SmLSIGlobalSolver (declaration) -------------------------
class SmLSIGlobalSolver : public SmGlobalSolver
{
public:
const SmSurface * m_pSurf;
const SmExtent2d & m_crUVDomain;
SmPoint3d m_vLinePoint;
SmVector3d m_vLineVector;
const SmExtent1d * m_cpLineInterval;
SmBoolean m_bRayFire;
double m_dDistanceTolerance;
SmLSIGlobalSolver(SmTree * pSurfaceTree,
const SmExtent2d & crUVDomain,
const SmPoint3d & crLinePoint,
const SmVector3d & crLineVector,
const SmExtent1d * cpLineInterval,
SmBoolean bRayFire,
double dDistanceTolerance);
virtual ~SmLSIGlobalSolver() { m_cpLineInterval = NULL ;
m_dDistanceTolerance = SM_UNDEF_DOUBLE ;
}
virtual SmBoolean BranchMayContainAnswers(SmTreeNode * apBranch[SM_GS_MAX_TREES]);
virtual SmStatus LocalSolve(SmTreeNode * apBranch[SM_GS_MAX_TREES],
SmBoolean & rbNeedsMoreSubdivision);
virtual SmSolutionPairType IdenticalSolutions(const SmSolution & crSol1,
const SmSolution & crSol2,
const SmSolution *&pPreferredSol)
const;
} ;
namespace sc_srf_p10
{
// clang-format off
// ---- verbatim: SmSurface.cpp lines 13053-13063: sm_ConvertToParameterDelta
static double sm_ConvertToParameterDelta
(const SmVector3d & crTangentVector,
const SmVector3d & crDeltaVector)
{
double dTanLen = crTangentVector.Length();
if (dTanLen < SM_EFF_ZERO) return 0.0;
SmVector3d sUnitTan = crTangentVector / dTanLen;
double dDot = sUnitTan.Dot(crDeltaVector);
return dDot/dTanLen;
} // end sm_ConvertToParameterDelta
// ---- verbatim: SmSurface.cpp lines 13080-13773: sm_ClassifyCurveSurfaceXSectPoint
static SmStatus sm_ClassifyCurveSurfaceXSectPoint
(const SmSurface & crSurface, // in : Target Surface
const SmExtent2d & crUVDomain, // in : Target Surface Domain
const SmCurve & crCurve, // in : Target Curve
const SmExtent1d & crInterval, // in : Target Curve Domain
const SmPoint2d & crCurrentUV, // in : Current Surface Solution Point
double dCurrentT, // in : Current Curve Solution Point
SmBoolean & rbFoundGuess, // out: TRUE = Found a nearby intersection guess point
// will be set to FALSE when rePointType != SM_TC_NEAR_TANGENT
// or when 2nd guessPoint falls outside of input domains.
SmPoint2d & rNewUVGuess, // out: Surface GuessPoint
double & rdNewTGuess, // out: Curve GuessPoint
SmTsectCurveType & rePointType) // out: oneof: SM_TC_TOUCHING - degenerate curve marks a point on the surface
// SM_TC_CROSSING - curve crosses surface at a single point
// SM_TC_TANGENT - one intersection point
// SM_TC_COINCIDENT - curve likely to be coincident near tgt point
// SM_TC_NEAR_TANGENT - when rbFoundGuess is set to true, curve
// is likely to have a 2nd nearby intersection point
{
// init output
rbFoundGuess = FALSE ;
rePointType = SM_TC_CROSSING ;
// Get SurfacePoint Evaluation and SurfaceNormal
SmVector3d sPVV[3][3]; // out: matrix of evaluations values
// organized: [D Du Duu ]
// [Dv Duv 0 ]
// [Dvv 0 0 ]
SER(crSurface.Evaluate(crCurrentUV, 2, 2, TRUE, TRUE, TRUE, &sPVV[0][0], FALSE)); // exact Tangent values ?may need to change?
// get surface Normal
SmVector3d sSurfaceNormal = sPVV[1][0] * sPVV[0][1];
if (sSurfaceNormal.LengthSquared() < SM_EFF_ZERO_SQ)
{ SER(crSurface.EvaluateNormal(crCurrentUV, TRUE, TRUE, sSurfaceNormal));
}
else { SER(sSurfaceNormal.Unitize());
}
sPVV[2][2] = sSurfaceNormal; // Must be here for smsurf_EvaluateGeometric().
// Get the geometric properties of the curve at the current intersection
SmVector3d sCurveGeomVec[4] ; // out: a[0] = position
// a[1] = 1st derivative, Mag = Speed, direction = tangent vector
// a[2] = Curvature Vector, Mag = K, direction = normal vector
// a[3] = Torsion Vector, Mag = Torsion, direction = binormal vector
// note: Osculating circle center: center = pos + RadOfCurv * NormalVector
// center = a[0] + a[2]/a[2].LengthSquared(), when a[2].LengthSquared() is not zero.
if(SM_ERR == crCurve.EvaluateGeometric(dCurrentT, 2, TRUE, sCurveGeomVec))
{ // no extra guesses or possible coincidence signalled for degenerate curves
rePointType = SM_TC_TOUCHING ;
return(SM_SUCCESS) ;
}
#ifdef SM_DEBUG_CODE
SmBoolean bDebugMe = FALSE ;
if(bDebugMe)
{
SmBrep *pBrep = crSurface.GetFace() ? ((SmFace *)crSurface.GetFace())->GetBrep() : NULL ;
if(pBrep == NULL) pBrep = crCurve.GetOwner() ? ((SmEdge *)crCurve.GetEdge())->GetBrep() : NULL ;
smgfx_Erase() ;
smgfx_SetLook(1,2, 0,0,1) ; if(pBrep) pBrep->Draw(TRUE) ; sm_GraphicsLoop() ;
smgfx_SetLook(1,2, 0,1,1) ; crSurface.DrawUV() ; sm_GraphicsLoop() ;
smgfx_SetLook(2,3, 0,1,0) ; crCurve.Draw() ; sm_GraphicsLoop() ;
smgfx_SetLook(4,5, 1,0,0) ; sPVV[0][0].Draw() ; sm_GraphicsLoop() ;
smgfx_SetLook(5,6, 1,0,1) ; sCurveGeomVec[0].Draw() ; sm_GraphicsLoop() ;
sm_GraphicsLoop() ;
}
#endif // SM_DEBUG_CODE
// no work - curve is not within 20 degrees of tangency to surface
if (!sSurfaceNormal.IsPerpendicularTo(sCurveGeomVec[1],20.0))
{ rePointType = SM_TC_CROSSING ;
return SM_SUCCESS;
}
// Evaluate Surface Position and NormalSection in direction of CurveTangent.
// This should give us two circles or a line and a circle to intersect.
SmPoint3d sSurfacePoint = sPVV[0][0] ;
SmVector3d sSurfaceSectionTangent;
double dSurfaceSectionCurvature;
// Surface differential locals
double dGaussianCurvature ; // out: GaussianCurvature = K1*K2 (principal curvatures)
double dNormalCurvature ; // out: MeanCurvature = 1/2(K1 + K2)
double dPrincipleCurvature1 ; // out: 1st principal curvature value ; K1
double dPrincipleCurvature2 ; // out: 2nd principal curvature value ; K2
SmVector3d sEFGOfFirstFundForm ; // out: 1st fundamental form ; [E ; F ; G]
SmVector3d sLMNOfSecondFundForm ; // out: 2nd fundamental form ; [L ; M ; N]
SmVector3d PrincipleCurvatureVector1 ; // out: 3d vector tangent to surface in 1st principal direction
SmVector3d PrincipleCurvatureVector2 ; // out: 3d vector tangent to surface in 2nd principal direction
SER(crSurface.EvaluatePoint(crCurrentUV, sSurfacePoint));
SER(smsurf_EvaluateNormalSection(sPVV, sCurveGeomVec[1],
sSurfaceSectionTangent,
dSurfaceSectionCurvature));
SER(smsurf_EvaluateGeometric(sPVV, dGaussianCurvature,
dNormalCurvature,
dPrincipleCurvature1,
dPrincipleCurvature2,
sEFGOfFirstFundForm,
sLMNOfSecondFundForm,
PrincipleCurvatureVector1,
PrincipleCurvatureVector2)) ;
SmLocalSurfaceType eSurfaceType = ( smos_Fabs(dNormalCurvature) < SM_EFF_ZERO_SQRT
&& smos_Fabs(dPrincipleCurvature1) < SM_EFF_ZERO_SQRT
&& smos_Fabs(dPrincipleCurvature2) < SM_EFF_ZERO_SQRT) ? SM_LS_PLANAR
: (dGaussianCurvature > SM_EFF_ZERO_SQRT) ? SM_LS_ELLIPTICAL
: (dGaussianCurvature < -SM_EFF_ZERO_SQRT) ? SM_LS_HYPERBOLIC
: SM_LS_CYLINDRICAL ;
// Get Curve Curvature, Normal vector, and Binormal vectors
SmVector3d sCurveNormal = sCurveGeomVec[2];
double dCurveCurvature = sCurveNormal.Length();
if (smos_Fabs(dCurveCurvature) > SM_EFF_ZERO_SQRT)
{
sCurveNormal /= dCurveCurvature ;
}
else // curve is close to being a straight line - let CurveNormal = sSurfaceNormal
{
sCurveNormal = sSurfaceNormal ;
}
SmVector3d sCurveBinormal = sCurveGeomVec[1] * sCurveNormal ;
// degenerate curve check
if (sCurveBinormal.LengthSquared() < SM_EFF_ZERO_SQ)
{
rePointType = SM_TC_TOUCHING ;
return SM_SUCCESS ;
}
SER(sCurveBinormal.Unitize()) ;
// get the cosine of the angle between the surfaceSectionNormal plane and
// the plane of the curve's osculating circle (needed for Meusnier's Theorem)
double dAngRad ;
sCurveBinormal.AngleBetween(sSurfaceNormal, dAngRad) ;
double dCosPhi = smos_Fabs(smos_Cosine(dAngRad - SM_PI/2.0)) ;
// characterize the curve shape as a circle or a line
SmBoolean bCurveLine = FALSE ;
double dCurveRadius = 0.0;
SmPoint3d sCurveCenter, sCurvePoint ;
SmVector3d sCurveCircleNormal, sCurveVec ;
if(smos_Fabs(dCurveCurvature) > SM_EFF_ZERO_SQRT)
{
// let Curve = curve osculating circle
bCurveLine = FALSE ;
dCurveRadius = smos_Fabs(1.0/dCurveCurvature);
sCurveCenter = sCurveGeomVec[0] + sCurveNormal * dCurveRadius;
sCurveCircleNormal = sCurveBinormal ;
}
else // curve is a line
{
bCurveLine = TRUE ;
}
// always load CurvePoint and CurveVec because when circle is large
// the curve is treated as a line
sCurvePoint = sCurveGeomVec[0] ;
sCurveVec = sCurveGeomVec[1] ;
// characterize the surface section curve or
// the surface dupin indicatrix shape (when curve plane is tangent to surface) as
// an osculating circle in the CurvePlane, a line, or two lines
SmBoolean bSurfaceLine = FALSE, bSurfaceTwoLines = FALSE ;
double dSurfaceRadius = 0.0;
SmPoint3d sSurfaceCenter ;
SmVector3d sSurfaceCircleNormal, sSurfaceVec, sSurfaceVec2 ;
// if the curve plane is tangent to the surface plane
if(smos_Fabs(dCosPhi) < SM_EFF_ZERO_RAD)
{
// It is either coincident, tangent or tangent and needs to be intersected
// with the asymptopes of the dupin's indicatrix curves.
switch(eSurfaceType)
{
case SM_LS_PLANAR : rePointType = SM_TC_COINCIDENT ;
return(SM_SUCCESS) ;
case SM_LS_ELLIPTICAL : rePointType = SM_TC_TANGENT ;
return(SM_SUCCESS) ;
case SM_LS_HYPERBOLIC : { rePointType = SM_TC_TANGENT ;
bSurfaceLine = TRUE ;
bSurfaceTwoLines = TRUE ;
// Let us compute the vectors by evaluating the hyperbola
// K1*x^2 + K2*y^2 = 1 at a large X value and computing the
// Y. This should give us a vector in terms of the principle
// curvature vectors which defines the asymptotic directions of the
// hyperbola.
double dY = 10000.0;
double dTmp = (1-dPrincipleCurvature1*dY*dY) / dPrincipleCurvature2;
if (dTmp < 0.0) dTmp = 0.0; // should be caught as elliptical or cylindrical cases, but just in case. . .
double dX = smos_Sqrt( dTmp );
//double dSize = smos_Sqrt(dY*dY + dX*dX) ;
sSurfaceVec = dY * PrincipleCurvatureVector1 + dX * PrincipleCurvatureVector2;
sSurfaceVec2 = dY * PrincipleCurvatureVector1 - dX * PrincipleCurvatureVector2;
sSurfaceVec.Unitize() ;
sSurfaceVec2.Unitize() ;
}
break ;
case SM_LS_CYLINDRICAL : rePointType = SM_TC_TANGENT ;
bSurfaceLine = TRUE ;
bSurfaceTwoLines = FALSE ;
sSurfaceVec = smos_Fabs(dPrincipleCurvature1) < SM_EFF_ZERO_SQRT
? PrincipleCurvatureVector1
: PrincipleCurvatureVector2 ;
break ;
} // end switch on eSurfaceType
} // end curvePlane is tangent to surface branch
// else curvePlane is not tangent to surface and when the surfaceSection is flat
else if (smos_Fabs(dSurfaceSectionCurvature) < SM_EFF_ZERO_SQRT)
{
bSurfaceLine = TRUE ;
bSurfaceTwoLines = FALSE ;
sSurfaceVec = sSurfaceSectionTangent ;
}
else // curvePlane is not tangent to surface and surfaceSection is curved
{
bSurfaceLine = FALSE ;
bSurfaceTwoLines = FALSE ;
sSurfaceVec = sSurfaceSectionTangent ;
// get surface osculating circle in the curve's plane
// remember to use Meusnier's theorem to pick correct SurfaceCircleRadius
dSurfaceRadius = smos_Fabs(1.0 / dSurfaceSectionCurvature) * dCosPhi ;
// rotate the surface normal into the curve's plane about the tangent
// vector - do this by projecting the surface normal onto the curve plane
// and unitizing.
SmVector3d sSurfaceCircleCenterVec = (sCurveBinormal * (smos_Sgn(dSurfaceSectionCurvature) * sSurfaceNormal)) * sCurveBinormal ;
sSurfaceCircleCenterVec.Unitize() ;
// sCircle1Center = lies in direction of the sSurfaceCircleCenterVec not the sSurfaceNormal
sSurfaceCenter = sSurfacePoint + sSurfaceCircleCenterVec * dSurfaceRadius ;
sSurfaceCircleNormal = sCurveBinormal;
} // end get surface osculating circle branch
#ifdef SM_DEBUG_CODE
if(bDebugMe)
{
SmBrep *pBrep = crSurface.GetFace() ? ((SmFace *)crSurface.GetFace())->GetBrep() : NULL ;
if(pBrep == NULL) pBrep = crCurve.GetOwner() ? ((SmEdge *)crCurve.GetEdge())->GetBrep() : NULL ;
smgfx_Erase() ;
smgfx_SetLook(1,2, 0,0,1) ; if(pBrep) pBrep->Draw(TRUE) ; sm_GraphicsLoop() ;
smgfx_SetLook(1,2, 0,1,1) ; crSurface.DrawUV() ; sm_GraphicsLoop() ;
smgfx_SetLook(2,3, 0,1,0) ; crCurve.Draw() ; sm_GraphicsLoop() ;
smgfx_SetLook(4,5, 1,0,0) ; sPVV[0][0].Draw() ; sm_GraphicsLoop() ;
smgfx_SetLook(5,6, 1,0,1) ; sCurveGeomVec[0].Draw() ; sm_GraphicsLoop() ;
smgfx_SetLook(2,3, 1,.5,0); if(bSurfaceLine) { (3.0 * sSurfaceVec).Draw(&sSurfacePoint) ; sm_GraphicsLoop() ;
(-3.0 * sSurfaceVec).Draw(&sSurfacePoint) ; sm_GraphicsLoop() ;
if(bSurfaceTwoLines)
{ (3.0 * sSurfaceVec2).Draw(&sSurfacePoint) ; sm_GraphicsLoop() ;
(-3.0 * sSurfaceVec2).Draw(&sSurfacePoint) ; sm_GraphicsLoop() ; } }
else { SMGFX_DRAWLIST(NULL,
smgfx_DrawCircularArc(sSurfaceCenter,
(sSurfacePoint-sSurfaceCenter),
(sSurfacePoint-sSurfaceCenter)*sSurfaceCircleNormal,
dSurfaceRadius,
-90.0, 90.0,
dSurfaceRadius/100,
NULL)) ; sm_GraphicsLoop() ; }
smgfx_SetLook(3,4, .5,1,0); if(bCurveLine) { (3.0 * sCurveVec).Draw(&sCurvePoint) ; sm_GraphicsLoop() ;
(-3.0 * sCurveVec).Draw(&sCurvePoint) ; sm_GraphicsLoop() ; }
else{ SMGFX_DRAWLIST(NULL,
smgfx_DrawCircularArc(sCurveCenter,
(sCurvePoint-sCurveCenter),
(sCurvePoint-sCurveCenter)*sCurveCircleNormal,
dCurveRadius,
-90.0, 90.0,
dCurveRadius/100,
NULL)) ; sm_GraphicsLoop() ; }
sm_GraphicsLoop() ;
}
#endif // SM_DEBUG_CODE
// We need a tolerance for line and circle intersections.
// They're purely geometric, but could well have tolerance issues.
// Look to topology first, otherwise use heuristics.
double dCurveTol = SM_EFF_ZERO_SQRT; // default values, if nothing else to use.
double dSurfaceTol = SM_EFF_ZERO_SQRT;
SmEdge *pCurveOwner = SM_CAST_PTR( SmEdge, crCurve.GetOwner() );
if ( pCurveOwner != NULL )
{ dCurveTol = pCurveOwner->GetTolerance(); }
else if ( !bCurveLine )
{ dCurveTol = dCurveRadius / 1000; }
SmFace *pSurfaceOwner = SM_CAST_PTR( SmFace, crSurface.GetOwner() );
if ( pSurfaceOwner != NULL )
{ dSurfaceTol = pSurfaceOwner->GetTolerance(); }
else if ( !bSurfaceLine )
{ dSurfaceTol = dSurfaceRadius / 1000; }
double d3DTol = dCurveTol + dSurfaceTol;
// when both curve and surface shapes are lines
if(bCurveLine && bSurfaceLine)
{
// classify the point as crossing or coincident
rePointType = ( ( bSurfaceTwoLines && sCurveVec.IsParallelTo(sSurfaceVec2, 2.0))
|| ( bSurfaceLine && sCurveVec.IsParallelTo(sSurfaceVec, 2.0)))
? SM_TC_COINCIDENT
: SM_TC_CROSSING ;
// all done
return(SM_SUCCESS) ;
}
// when both shapes are curved - see if one should be treated as a line
if(!bCurveLine && !bSurfaceLine)
{
// when osculating circle radii vastly differ - treat one shape as a line
// (Note, 2.0 is not enough. [B30])
if (dCurveRadius > 1000.0 * dSurfaceRadius) { bCurveLine = TRUE ; }
else if(dSurfaceRadius > 1000.0 * dCurveRadius) { bSurfaceLine = TRUE ; }
}
// look for second intersections
SmVector3d sFoundVector ;
// when curve is linear or close enough
if(bCurveLine)
{
// intersect CurveLine with SurfaceOsculating Circle
ULONG lNumTsect;
double adTsectLineParam[2];
// intersect line with circle
SER(smgu_LineCoPlanarCircleIntersect(sCurvePoint, sCurveVec,
sSurfaceCenter, sSurfaceCircleNormal,
dSurfaceRadius, d3DTol,
lNumTsect, adTsectLineParam));
// If only have one or zero intersections we are done without
// picking up extra guess or finding coincidence
switch(lNumTsect)
{
// If no intersection, it's probably a tolerance thing,
// and probably tangent. (Was CROSSING in that case.)
// But leave the warning in, it should be checked.
case 0: { rePointType = SM_TC_TANGENT ; WARN(_T("Unexpected Branch")) ; return SM_SUCCESS; }
case 1: { rePointType = SM_TC_TANGENT ; return SM_SUCCESS; }
case 2: { rePointType = SM_TC_NEAR_TANGENT ; break ; }
}
// Find the other intersection -- i.e. the one we don't have
double dLineT = (smos_Fabs(adTsectLineParam[1]) > smos_Fabs(adTsectLineParam[0]))
? adTsectLineParam[1]
: adTsectLineParam[0];
SmPoint3d sOtherTsect = sCurvePoint + dLineT * sCurveVec;
sFoundVector = dLineT * sCurveVec ;
} // end Curve is line branch
// when surface is linear
if(bSurfaceLine)
{
// intersect SurfaceLine with CurveOsculating Circle
ULONG lNumTsect, lNumTsect2 = 0;
double adTsectLineParam[2], adTsectLineParam2[2];
SmVector3d sFoundVector2 ;
SmTsectCurveType eLocalPointType = SM_TC_UNKNOWN, eLocalPointType2 = SM_TC_UNKNOWN ;
// intersect line with circle
SER(smgu_LineCoPlanarCircleIntersect(sSurfacePoint, sSurfaceVec,
sCurveCenter, sCurveCircleNormal,
dCurveRadius, d3DTol,
lNumTsect, adTsectLineParam));
// use number of intersections to classify the point against SurfaceVec
switch(lNumTsect)
{
// If no intersection, it's probably a tolerance thing,
// and probably tangent. (Was CROSSING in that case.)
// But leave the warning in, it should be checked.
case 0: { eLocalPointType = SM_TC_TANGENT ; WARN(_T("Unexpected Branch")) ; break ; }
case 1: { eLocalPointType = SM_TC_TANGENT ; break ; }
case 2: { eLocalPointType = SM_TC_NEAR_TANGENT ;
// Find the other intersection -- i.e. the one we don't have
double dLineT = (smos_Fabs(adTsectLineParam[1]) > smos_Fabs(adTsectLineParam[0]))
? adTsectLineParam[1]
: adTsectLineParam[0];
SmPoint3d sOtherTsect = sSurfacePoint + dLineT * sSurfaceVec;
sFoundVector = dLineT * sSurfaceVec ;
}
break ;
} // end switch on number of line/circle intersection points
// when surface is represented by two lines
if(bSurfaceTwoLines)
{
// intersect SurfaceLine2 with CurveOsculating Circle
SER(smgu_LineCoPlanarCircleIntersect(sSurfacePoint, sSurfaceVec2,
sCurveCenter, sCurveCircleNormal,
dCurveRadius, d3DTol,
lNumTsect2, adTsectLineParam2));
// use number of intersections to classify the point against SurfaceVec2
switch(lNumTsect2)
{
// If no intersection, it's probably a tolerance thing,
// and probably tangent. (Was CROSSING in that case.)
// But leave the warning in, it should be checked.
case 0: { eLocalPointType2 = SM_TC_TANGENT ; WARN(_T("Unexpected Branch")) ; break ; }
case 1: { eLocalPointType2 = SM_TC_TANGENT ; break ; }
case 2: { eLocalPointType2 = SM_TC_NEAR_TANGENT ;
// Find the other intersection -- i.e. the one we don't have
double dLineT = (smos_Fabs(adTsectLineParam2[1]) > smos_Fabs(adTsectLineParam2[0]))
? adTsectLineParam2[1]
: adTsectLineParam2[0];
SmPoint3d sOtherTsect = sSurfacePoint + dLineT * sSurfaceVec;
sFoundVector2 = dLineT * sSurfaceVec ;
}
break ;
} // end switch on number of line/circle intersection points
} // end need to intersect with SurfaceVec2 check
// When there are no near-tangent cases - classify the intersection and exit
if(eLocalPointType != SM_TC_NEAR_TANGENT && eLocalPointType2 != SM_TC_NEAR_TANGENT)
{
rePointType = (!bSurfaceTwoLines) ? eLocalPointType : SM_TC_TANGENT ;
return(SM_SUCCESS) ;
}
// arrive here when we have a near-tangent case
rePointType = SM_TC_NEAR_TANGENT ;
// when there are two near-tangent cases
if(eLocalPointType == SM_TC_NEAR_TANGENT && eLocalPointType2 == SM_TC_NEAR_TANGENT)
{
// pick the closest 2nd intersection point (maybe we should use both)
if(sFoundVector2.LengthSquared() < sFoundVector.LengthSquared())
{ sFoundVector = sFoundVector2 ; }
}
// when only the second intersection was a near tangent case
else if(eLocalPointType2 == SM_TC_NEAR_TANGENT)
{
sFoundVector = sFoundVector2 ;
}
// else first intersection is a tangent case and sFoundVector is already set
} // end when surface is linear branch
// when curve and surface are both curved
if(!bCurveLine && !bSurfaceLine)
{
// intersect osculating curve and surface circles
ULONG lNumTsect;
SmPoint3d sTsectPoints[2];
// Do BiggerCircle/SmallerCircle intersection
if (dCurveRadius > dSurfaceRadius)
{
SER(smgu_CircleCoPlanarCircleIntersect(sCurveCircleNormal,
sCurveCenter,dCurveRadius,sSurfaceCenter,dSurfaceRadius,
d3DTol,
lNumTsect,sTsectPoints));
}
else
{
SER(smgu_CircleCoPlanarCircleIntersect(sSurfaceCircleNormal,
sSurfaceCenter,dSurfaceRadius,sCurveCenter,dCurveRadius,
d3DTol,
lNumTsect,sTsectPoints));
}
// If only have one or zero intersections we are done without
// picking up extra guess
switch(lNumTsect)
{
// If no intersection, it's probably a tolerance thing,
// and probably tangent. (Was CROSSING in that case.)
// But leave the warning in, it should be checked.
case 0: { rePointType = SM_TC_TANGENT ; WARN(_T("Unexpected Branch")) ; return SM_SUCCESS; }
case 1: { rePointType = SM_TC_TANGENT ; return SM_SUCCESS; }
case 2: { rePointType = SM_TC_NEAR_TANGENT ; break ; }
case 3: { rePointType = SM_TC_COINCIDENT ; return SM_SUCCESS; }
}
// else save new intersection guess point
sFoundVector = sTsectPoints[0] - sSurfacePoint ;
sFoundVector = (sFoundVector.Length() < sTsectPoints[1].DistanceBetween(sSurfacePoint))
? (sTsectPoints[1] - sSurfacePoint)
: (sTsectPoints[0] - sSurfacePoint) ;
} // end curve and surface are both curved branch
// { // let Circle1 = surface osculating circle in the curve's plane
// // remember to use Meusnier's theorem to pick correct circle1Radius
// dCircle1Radius = smos_Fabs(1.0 / dSurfaceSectionCurvature) * dCosPhi ;
// // SER(sSurfaceNormal.Unitize()); // all ready unitized
// // SER(sCurveNormal.Unitize()); // all ready unitized
//
// // rotate the surface normal into the curve's plane about the tangent
// // vector - do this by projecting the surface normal onto the curve plane
// // and unitizing.
// SmVector3d sSurfaceCircleNormal = (sCurveBinormal * sSurfaceNormal) * sCurveBinormal ;
// sSurfaceCircleNormal.Unitize() ;
//
// // sCircle1Center = lies in direction of the sSurfaceCircleNormal not the sSurfaceNormal
// sCircle1Center = sSurfacePoint + sSurfaceCircleNormal * dCircle1Radius ;
// sCircle1Normal = sCurveBinormal;
//
// // when Curve Curvature is or is close enough to being a line
// if ( smos_Fabs(dCurveCurvature) < SM_EFF_ZERO_SQRT
// || smos_Fabs(1.0/dCurveCurvature) > 2.0 * dCircle1Radius)
// {
// sLinePoint = sCurveGeomVec[0];
// sLineVec = sCurveGeomVec[1];
// SER(sLineVec.Unitize());
// bLineCircleIntersection = TRUE;
// }
// else // curve and surface curvatures are close enough to take into consideration
// {
// // let Circle2 = curve osculating circle
// dCircle2Radius = smos_Fabs(1.0/dCurveCurvature);
//
// // when surface is flat compared to the curve
// if (dCircle1Radius > 2.0 * dCircle2Radius)
// {
// // let circle1 = curve osculating circle
// dCircle1Radius = smos_Fabs(1.0/dCurveCurvature);
// sCircle1Center = sCurveGeomVec[0] + sCurveNormal * dCircle1Radius;
// sCircle2Normal = sCurveBinormal;
//
// // let line = surface tangent line
// sLinePoint = sSurfacePoint;
// sLineVec = sSurfaceSectionTangent;
// SER(sLineVec.Unitize());
// bLineCircleIntersection = TRUE;
// }
// else // curve and surface curvature are nearly equal branch
// {
// // let circle2 = curve osculating circle
// sCircle2Center = sCurveGeomVec[0] + sCurveNormal * dCircle2Radius;
// sCircle2Normal = sCurveBinormal;
// } // end nearly equal curve and surface curvatures branch
// } // end curve ans surface curvatures are close to one another
// } // end surface curvature in curve direction check
//
// SmBoolean bLineCircleIntersection = FALSE, bTwoLineIntersection = FALSE ;
//
// double dCircle1Radius, dCircle2Radius;
// SmPoint3d sLinePoint, sCircle1Center, sCircle2Center;
// SmVector3d sLineVec, sLineVec2, sCircle1Normal, sCircle2Normal;
// SmVector3d sFoundVector;
//
// // If the surface section curvature is zero then use a line instead of a circle for the surface.
// // Also if the radius of one circle is greater then twice the
// // other use a line for the one with the larger radius.
//
//
// // when test = circle/line intersection
// if (bLineCircleIntersection)
// {
// ULONG lNumTsect;
// double adTsectLineParam[2];
//
// // intersect line with circle
// SER(smgu_LineCoPlanarCircleIntersect(sLinePoint, sLineVec,
// sCircle1Center, sCircle1Normal,
// dCircle1Radius, SM_EFF_ZERO,
// lNumTsect, adTsectLineParam));
//
// // If only have one or zero intersections we are done without
// // picking up extra guess or finding coincidence
// switch(lNumTsect)
// {
// case 0: rePointType = SM_TC_CROSSING ; WARN(_T("Unexpected Branch")) ; return SM_SUCCESS;
// case 1: rePointType = SM_TC_TANGENT ; return SM_SUCCESS;
// case 2: rePointType = SM_TC_NEAR_TANGENT ; break ;
// }
//
// // Find the other intersection -- i.e. the one we don't have
// double dLineT = adTsectLineParam[0];
// if (smos_Fabs(adTsectLineParam[1]) > smos_Fabs(adTsectLineParam[0]))
// {
// dLineT = adTsectLineParam[1];
// }
// SmPoint3d sOtherTsect = sLinePoint + dLineT * sLineVec;
// sFoundVector = dLineT * sLineVec;
// }
// else // test = circle/circle interesection
// {
// ULONG lNumTsect;
// SmPoint3d sTsectPoints[2];
//
// // Do BiggerCircle/SmallerCircle intersection
// if (dCircle1Radius > dCircle2Radius)
// {
// SER(smgu_CircleCoPlanarCircleIntersect(sCircle1Normal,
// sCircle1Center,dCircle1Radius,sCircle2Center,dCircle2Radius,
// SM_EFF_ZERO,
// lNumTsect,sTsectPoints));
// }
// else
// {
// SER(smgu_CircleCoPlanarCircleIntersect(sCircle2Normal,
// sCircle2Center,dCircle2Radius,sCircle1Center,dCircle1Radius,
// SM_EFF_ZERO,
// lNumTsect,sTsectPoints));
// }
//
// // If only have one or zero intersections we are done without
// // picking up extra guess
// switch(lNumTsect)
// {
// case 0: rePointType = SM_TC_CROSSING ; WARN(_T("Unexpected Branch")) ; return SM_SUCCESS;
// case 1: rePointType = SM_TC_TANGENT ; return SM_SUCCESS;
// case 2: rePointType = SM_TC_NEAR_TANGENT ; break ;
// case 3: rePointType = SM_TC_COINCIDENT ; return SM_SUCCESS;
// }
//
// // else save new intersection guess point
// sFoundVector = sTsectPoints[0] - sSurfacePoint;
// if (sFoundVector.Length() < sTsectPoints[1].DistanceBetween(sSurfacePoint))
// {
// sFoundVector = sTsectPoints[1] - sSurfacePoint;
// }
// } // end test = circle/circle intersection
// Use the found vector to compute an approximate step in the
// curve and surface parameters.
SmVector3d sDU = sPVV[1][0] ;
SmVector3d sDV = sPVV[0][1] ;
rbFoundGuess = TRUE;
// old style: rdNewTGuess = dCurrentT + sm_ConvertToParameterDelta(sCurveGeomVec[1],sFoundVector);
// new style: account for circlular arc distance in curves.
// gwc: the two approaches were about the same so didn't bother to make a change to the surface guess.
rdNewTGuess = dCurrentT + smos_Sgn(sCurveGeomVec[1].Dot(sFoundVector))
* ( bCurveLine ? sFoundVector.Length()
: 2.0 * dCurveRadius * smos_ArcSine(sFoundVector.Length()/2.0/dCurveRadius))
/ sCurveGeomVec[1].Length();
// Use the combined 2d shift, instead of two 1-d shifts. [B30]
SmPoint2d sDeltaUV;
SmStatus eStat = smgu_VecLinCombTwoVectors( sDU, sDV, sFoundVector, sDeltaUV );
if ( eStat == SM_SUCCESS )
{
rNewUVGuess = crCurrentUV + sDeltaUV;
}
else
{
// Well, ok, if the 2d shift fails, then try two 1-d shifts.
// Presumably one will succeed and one will fail, but the one that fails
// is on a degenerate surface derivative, so its magnitude doesn't mean much anyway.
rNewUVGuess.x = crCurrentUV.x + sm_ConvertToParameterDelta(sDU,sFoundVector);
rNewUVGuess.y = crCurrentUV.y + sm_ConvertToParameterDelta(sDV,sFoundVector);
}
// skip guesses outside of both given domains - keep guesses in at least one domain
if ( !crInterval.ContainsValue(rdNewTGuess)
&& !crUVDomain.ContainsPoint2d(rNewUVGuess))
{
// If the guess is outside of the domain we'll be able to pick it up using
// another method.
rbFoundGuess = FALSE;
return SM_SUCCESS;
}
// set output
rdNewTGuess = crInterval.ClampValue(rdNewTGuess);
rNewUVGuess = crUVDomain.ClampPoint2d(rNewUVGuess);
#ifdef SM_DEBUG_CODE
if(bDebugMe)
{
SmBrep *pBrep = crSurface.GetFace() ? ((SmFace *)crSurface.GetFace())->GetBrep() : NULL ;
if(pBrep == NULL) pBrep = crCurve.GetOwner() ? ((SmEdge *)crCurve.GetEdge())->GetBrep() : NULL ;
SmVector3d sNewCurvePt, sNewSurfacePt ;
crCurve.EvaluatePoint(rdNewTGuess, sNewCurvePt) ;
crSurface.EvaluatePoint(rNewUVGuess, sNewSurfacePt) ;
smgfx_Erase() ;
smgfx_SetLook(1,2, 0,0,1) ; if(pBrep) pBrep->Draw(TRUE) ; sm_GraphicsLoop() ;
smgfx_SetLook(1,2, 0,1,1) ; crSurface.DrawUV() ; sm_GraphicsLoop() ;
smgfx_SetLook(2,3, 0,1,0) ; crCurve.Draw() ; sm_GraphicsLoop() ;
smgfx_SetLook(4,5, 1,0,0) ; sPVV[0][0].Draw() ; sm_GraphicsLoop() ;
smgfx_SetLook(1,5, 1,.5,0); sPVV[0][0].DrawPointToPoint(sPVV[0][0]+sFoundVector) ; sm_GraphicsLoop() ;
smgfx_SetLook(5,6, 1,0,1) ; sCurveGeomVec[0].Draw() ; sm_GraphicsLoop() ;
smgfx_SetLook(7,8, 0,0,1) ; sNewCurvePt.Draw() ; sm_GraphicsLoop() ;
smgfx_SetLook(7,8, 0,.5,1); sNewSurfacePt.Draw() ; sm_GraphicsLoop() ;
sm_GraphicsLoop() ;
}
#endif // SM_DEBUG_CODE
// all done
return SM_SUCCESS; // Found a guess - loaded it now we are done
} // end sm_ClassifyCurveSurfaceXSectPoint
// ---- verbatim: SmSurface.cpp lines 15517-16945: sm_GlobalCurveIntersectCombineSolutions
/*******************************************************************//**
PURPOSE: Combine set of Surface/Curve solutions into unique
point and coincident segment solutions.
NOTES: Note that the solutions will be sorted relative to the curve.
***********************************************************************/
static SmStatus sm_GlobalCurveIntersectCombineSolutions
(const SmSurface & crSurface, // in : Surface being intersected
const SmExtent2d & crUVDomain, // in : Domain of the surface to intersect
const SmCurve & crCurve, // in : Curve to intersect with surface
const SmExtent1d & crInterval, // in : Domain of curve to intersect
double dDistanceTolerance, // in : 3D distance tolerance to use in intersection
SmSolutionArray & rSolutions) // i/o: Contains results of intersection
{
// locals
SmBoolean bFoundCoincidence = FALSE;
ULONG ii, jj ;
// See if Pairs of Solutions should be combined
// Classify the Opening between the two solutions
// case 1: Solutions are two ends of a closed curve - don't combine
// case 2: Solutions are two different ends of a seam in a closed surface - don't combine
// case 3: Solution interval EndPoints touch - do combine
// case 4: Solution Intervals overlap - do combine
// case 5: There is an opening between two interval solutions
// 5a. Curve and Surface are coincident throughout Solution Opening - do combine
// 5b. Curve and Surface are not coincident throughout Solution Opening - don't combine
// case 6: GWC: a Point solution neighbors a point solution -
// if both TsectPoints classify to SM_TC_COINCIDENT and the
// curve and Surface are coincident throughout Solution Opening - mark bFoundCoincidence TRUE
// case 7: GWC: a coincident interval neighbors a point solution,
// If the TsectPoint classifies to SM_TC_COINCIDENT - combine solutions
// if the TsectPoint classifies to SM_TC_CROSSING, SM_TC_NEAR_TANGENT or
// SM_TC_TANGENT, drop the coincident interval assuming intersecting
// nearly tangent curves
// gwc: When a nearly tangent curve intersects a surface it's possible
// that the actual intersection point(s) plus several neighboring
// coincident interval subdivision spans segments are returned as
// solutions - Save the intersection points and drop the
// false coincident segments.
// gwc: When a curve coincident to a surface is intersected its possible the
// local solve will return a set of intersection points - one per
// curveSubdivisionTree leaf node. These intersection points need
// to be identified as coincident solutions so that that the DropAndTrimCurve()
// function can be called to test for coincidence. This is done
// by setting the bFoundCoincidence boolean variable to TRUE.
#ifdef SM_DEBUG_CODE
SmBoolean bDebugMe = FALSE ;
if (bDebugMe)
{
rSolutions.Dump();
SmFace *pFace = (SmFace *)crSurface.GetFace() ;
SmEdge *pEdge = (SmEdge *)crCurve.GetEdge() ;
SmBrep *pBrep1 = pFace ? pFace->GetBrep() : NULL ;
SmBrep *pBrep2 = pEdge ? pEdge->GetBrep() : NULL ;
smgfx_Erase();
smgfx_SetLook(1,2, 0,0,1); if(pBrep1) pBrep1->Draw(TRUE) ; sm_GraphicsLoop() ;
smgfx_SetLook(1,2, 0,1,0); if(pBrep2) pBrep2->Draw(TRUE) ; sm_GraphicsLoop() ;
smgfx_SetLook(1,3, 0,1,1); crSurface.DrawUV(); sm_GraphicsLoop();
smgfx_SetLook(1,2, 0,0,0); if(pFace) pFace->Draw(SM_DM_CROSSHATCH); sm_GraphicsLoop() ;
smgfx_SetLook(2,3, 0,1,0); crCurve.Draw(); sm_GraphicsLoop();
smgfx_SetLook(4,5, 1,0,1); if(pEdge) pEdge->Draw(); sm_GraphicsLoop();
smgfx_SetLook(6,7, 1,0,0); rSolutions.Draw() ; sm_GraphicsLoop() ;
sm_GraphicsLoop();
}
#endif // SM_DEBUG_CODE
// keep, combine, drop, and compress solutions inplace in the rSolutions array in two phases.
// phase 1: merge coincident intervals
// merge point solutions close enough to be the same point
// identify point solutions that classify to SM_TC_COINCIDENT and
// remember that by setting bFoundCoincidence == TRUE.
// phase 2: drop coincident intervals that include or neighbor point solutions
// that don't classify to SM_TC_COINCIDENT
// rSolutions Indexing: keep a last intervalIndex and a last PointIndex,
// use a pointer to switch between the two within the upcoming loop.
// locals
SmVector2d sUVSize = crSurface.GetNaturalUVDomain().GetSize();
double sTSize = crCurve.GetNaturalInterval().GetLength() ;
SmTsectCurveType ePointType = SM_TC_UNKNOWN ;
SmPoint2d sCurrentUV, sNewUVGuess ;
double dCurrentT, dNewTGuess ;
SmBoolean bFoundGuess ;
// set up rSolutions array indexing for Point and interval solutions
ULONG lLastIntervalIndex = 0;
ULONG lLastPointIndex = 0; // may actually point to a range solution if the point has been combined
ULONG *pLastIndex ;
if(rSolutions.GetSize() > 0)
{
if(rSolutions[0].m_eSolutionType == SM_ST_RANGE_OF_VALUES)
{ lLastIntervalIndex = 0 ;
lLastPointIndex = SM_BIG_ULONG ;
}
else { lLastIntervalIndex = SM_BIG_ULONG ;
lLastPointIndex = 0 ;
sCurrentUV.Set(rSolutions[0].m_vStart[1], rSolutions[0].m_vStart[2]) ;
dCurrentT = rSolutions[0].m_vStart[0] ;
sm_ClassifyCurveSurfaceXSectPoint( crSurface, crUVDomain,
crCurve, crInterval,
sCurrentUV, dCurrentT,
bFoundGuess, sNewUVGuess, dNewTGuess,
ePointType) ;
if( ePointType == SM_TC_COINCIDENT
// || ePointType == SM_TC_NEAR_TANGENT ... for tiny two-pt intersections [B124]
)
{
bFoundCoincidence = TRUE ;
}
}
} // end need to init CombineLoop locals check
// for every rSolution after the 1st
// - see if it can be combined with the lastProcessed solution of same type
for (ii=1; ii<rSolutions.GetSize(); ii++)
{
// get current Solution
SmSolution & rCurrSol = rSolutions[ii];
// solutions are ordered by the curve parameter value
// When working with closed surfaces and solutions on seams
// multiple solutions with the same curve parameter may be generated.
// Choose which of those to examine next.
// 1. Find solution closest to the last lProcessedEnd solution measuring dist between sol StartPoints
// 2. Place it in the next SolutionsArray Slot
// get index of last solution of same type as rCurrSol
pLastIndex = (rCurrSol.m_eSolutionType == SM_ST_RANGE_OF_VALUES)
? &lLastIntervalIndex
: &lLastPointIndex ;
// get last solution
SmSolution & rLastSol = (*pLastIndex != SM_BIG_ULONG)
? rSolutions[*pLastIndex]
: rSolutions[0] ;
SmSolutionEnd * pLastEnd = (rLastSol.m_eSolutionType == SM_ST_RANGE_OF_VALUES)
? &rLastSol.m_vEnd
: &rLastSol.m_vStart ;
SmBoolean bDoCombine = FALSE;
// no previous solution of same type - keep solution see if solutions array needs packing
if(*pLastIndex == SM_BIG_ULONG)
{
bDoCombine = FALSE ;
goto CombineDecided ;
}
{
// init ClosestSolution to this solution (closed surface solutions?)
ULONG lClosest = ii;
double dScaledZero = SM_EFF_ZERO * (1.0 + smos_Fabs(rSolutions[ii].m_vStart[0]));
// for every other solution - Look for other solutions that start where this one starts on the curve
for(jj=ii+1; jj<rSolutions.GetSize(); jj++)
{
// when a solution starts at the same CurveParam
if (smos_Fabs(rSolutions[lClosest].m_vStart[0]-rSolutions[jj].m_vStart[0]) < dScaledZero)
{
// when OtherStart/LastEnd is closer in SurfUVSpace than ClosestStart/LastEnd UVDist
double dUDiff1 = smos_Fabs(rSolutions[lClosest].m_vStart[1]-(*pLastEnd)[1]);
double dVDiff1 = smos_Fabs(rSolutions[lClosest].m_vStart[2]-(*pLastEnd)[2]);
double dUDiff2 = smos_Fabs(rSolutions[jj].m_vStart[1]-(*pLastEnd)[1]);
double dVDiff2 = smos_Fabs(rSolutions[jj].m_vStart[2]-(*pLastEnd)[2]);
if (dUDiff2+dVDiff2 < dUDiff1+dVDiff1)
{
// make ThisSolution the closest solution
lClosest = jj;
}
}
else // quit at the first worst solution
{ break; }
} // end iter every otherSolution matching up endPoints
// when a closer OtherSolution was found - swap its position in the rSolutions array
if (lClosest != ii)
{
// Swap lClosest and ii - the original sorting order was not what we wanted
SmSolution sTmpSol = rSolutions[lClosest];
rSolutions[lClosest] = rSolutions[ii];
rSolutions[ii] = sTmpSol;
SM_ASSERT(&(rCurrSol.m_vStart) == &(rSolutions[ii].m_vStart)) ;
}
}
// See if Pairs of Solutions should be combined
// Classify the Opening between the two solutions
// case 1: Solutions are two ends of a closed curve - don't combine
// case 2: Solutions are two different ends of a seam in a closed surface - don't combine
// case 3: Solution interval EndPoints touch - do combine
// case 4: Solution Intervals overlap - do combine
// case 5: There is an opening between two interval solutions
// 5a. Curves are coincident throughout Solution Opening - do combine
// 5b. Curves are not coincident throughout Solution Opening - don't combine
// case 6: GWC: a Point solution neighbors a point solution -
// if both TsectPoints classify to SM_TC_COINCIDENT and the
// curve and Surface are coincident throughout Solution Opening - do combine
// case 7: GWC: a coincident interval neighbors a point solution,
// If the TsectPoint classifies to SM_TC_COINCIDENT - set bFoundCoincidence = TRUE
// if the TsectPoint classifies to SM_TC_CROSSING, SM_TC_NEAR_TANGENT, or
// SM_TC_TANGENT, drop the coincident interval assuming intersecting
// nearly tangent curves
// make new scope to isolate local variable initializations from the goto statement
{
// locals
SmSolutionEnd & rCurrStart = rCurrSol.m_vStart;
// Don't allow jumping over seam -
// detect seam jumping by large UVdistances between matched endPoints
// Get UVDist Vector between Surface solution endPoints
SmVector2d sUVDiff(smos_Fabs(rCurrStart[1]-(*pLastEnd)[1]),
smos_Fabs(rCurrStart[2]-(*pLastEnd)[2]) );
// Get TDist between Curve solution endPoints
double sTDiff = smos_Fabs(rCurrStart[0]-(*pLastEnd)[0]);
// when the Surface endPoints are separated by the domain space
// and the Curve endPoints are coincident
// Note, the parameter diffs can be a little less than the domain size
// due to tolerances. [my_test_csi_tol()]
// if( ( smos_Fabs(sUVDiff.x-sUVSize.x) < SM_EFF_ZERO_SQRT
// || smos_Fabs(sUVDiff.y-sUVSize.y) < SM_EFF_ZERO_SQRT)
// && (sTDiff < SM_EFF_ZERO_SQRT))
if( ( sUVDiff.x > sUVSize.x * 0.90 // maybe add? && crSurface.IsClosed( SM_SP_V
|| sUVDiff.y > sUVSize.y * 0.90)) // maybe Add? && crSurface.IsClosed( SM_SP_U
// && sTDiff < sTSize * 0.10 )
{
// don't connect solutions across Surface seams
bDoCombine = FALSE ;
goto CombineDecided ;
}
// when the Curve endPoints are separted by the domain space
// and the surface endPoints are coincident
// if( (sTDiff - sTSize) < SM_EFF_ZERO_SQRT
// && sUVDiff.x < SM_EFF_ZERO_SQRT
// && sUVDiff.y < SM_EFF_ZERO_SQRT)
if ( sTDiff > sTSize * 0.90 )
// && sUVDiff.x < sUVSize.x * 0.10
// && sUVDiff.y < sUVSize.y * 0.10
// && crCurve.IsClosed( crInterval, dDistanceTolerance ))
{
// don't connect solutions across closed curve ends
bDoCombine = FALSE ;
goto CombineDecided ;
}
// When Solution endPoints touch on either curve or surface - combine solutions.
// Test works for both IntervalPair and PointPair Solutions
// Solutions pairs on opposite sides of seams have already been culled.
if( SM_ARE_SAME((*pLastEnd)[0],rCurrStart[0])
|| ( SM_ARE_SAME((*pLastEnd)[1],rCurrStart[1])
&& SM_ARE_SAME((*pLastEnd)[2],rCurrStart[2])))
{
bDoCombine = TRUE ;
// for interval solutions - make some exceptions
if(rCurrSol.m_eSolutionType == SM_ST_RANGE_OF_VALUES)
{
double dStartDev1 = rLastSol.m_vStart.m_dSolutionValue;
double dEndDev1 = rLastSol.m_vEnd.m_dSolutionValue;
// don't combine when end of rLastSol is much better solution than start
if ( dStartDev1 > SM_EFF_ZERO
&& dStartDev1 > dEndDev1 * 100000.0)
{
bDoCombine = FALSE;
}
double dStartDev2 = rCurrSol.m_vStart.m_dSolutionValue;
double dEndDev2 = rCurrSol.m_vEnd.m_dSolutionValue;
// don't combine when start of CurrSol is much better solution than end
if ( dEndDev2 > SM_EFF_ZERO
&& dEndDev2 > dStartDev2 * 100000.0)
{
bDoCombine = FALSE;
}
// // GWC: I'm going to delete this part of this heuristic - it makes no sense.
// // Perhaps the last two checks should be turned off as well.
//
// // Keep those intervals which are increasing or decreasing
// // GWC: This looks like a bad heuristic implementation
// // 1. Anything set to FALSE from (dStartDev1 > dEndDev1 * 100000.0) will be set back to TRUE here
// // 2. Anything set to FALSE from (dEndDev2 > dStartDev2 * 100000.0) can't be set back to TRUE here
// if ( dStartDev2 > 100.0*dEndDev2
// && dStartDev1 > 100.0*dEndDev1)
// {
// bDoCombine = TRUE;
// }
// If the smaller segment is less than 1/1000 of the other then
// just combine them anyhow.
double dLastLeng = smos_Max( SM_EFF_ZERO, rLastSol.m_vEnd[0] - rLastSol.m_vStart[0] );
double dCurrLeng = smos_Max( SM_EFF_ZERO, rCurrSol.m_vEnd[0] - rCurrSol.m_vStart[0] );
if ( dLastLeng > dCurrLeng * 1000.00
|| dCurrLeng > dLastLeng * 1000.00)
{
bDoCombine = TRUE;
}
} // end special exceptions for IntervalPair Solutions checks
goto CombineDecided ;
}
// for point solutions only
if(rCurrSol.m_eSolutionType == SM_ST_SINGLE_VALUE)
{
// evaluate solution points
SmPoint3d sPt1, sPt2 ;
crCurve.EvaluatePoint(rCurrStart[0], sPt1) ;
crCurve.EvaluatePoint((*pLastEnd)[0], sPt2) ;
double dDist2 = sPt1.DistanceBetweenSquared(sPt2) ;
// combine solutions when points are close enough together
// don't combine solutions far enough apart to be distinct.
bDoCombine = dDist2 < dDistanceTolerance * dDistanceTolerance ;
if(bDoCombine)
goto CombineDecided ;
// for solutions which are further apart
// see if points bound a coincident segment region
sCurrentUV.Set(rSolutions[0].m_vStart[1], rSolutions[0].m_vStart[2]) ;
dCurrentT = rSolutions[0].m_vStart[0] ;
sm_ClassifyCurveSurfaceXSectPoint( crSurface, crUVDomain,
crCurve, crInterval,
sCurrentUV, dCurrentT,
bFoundGuess, sNewUVGuess, dNewTGuess,
ePointType) ;
if( ePointType == SM_TC_COINCIDENT
// || ePointType == SM_TC_NEAR_TANGENT ... for tiny two-pt intersections [B124]
)
{
bFoundCoincidence = TRUE ;
} // end combine two points into a coincident segment check
} // end if point solutions branch
// for range solutions only
// case 4: Solution Intervals overlap - do combine
// case 5: There is an opening between the two interval solutions
// 5a. Curves are coincident throughout Solution Opening - do combine
// 5b. Curves are not coincident throughout Solution Opening - don't combine
if(rCurrSol.m_eSolutionType == SM_ST_RANGE_OF_VALUES)
{
SM_ASSERT(rLastSol.m_eSolutionType == SM_ST_RANGE_OF_VALUES) ;
// When SolutionIntervals overlap on both curve and surface - combine solutions
if((*pLastEnd)[0] >= rCurrStart[0])
{
bDoCombine = ( SM_IS_BETWEEN(rCurrStart[1],
rLastSol.m_vStart[1],
rLastSol.m_vEnd[1])
&& SM_IS_BETWEEN(rCurrStart[1],
rLastSol.m_vStart[1],
rLastSol.m_vEnd[1]))
? TRUE
: FALSE ;
goto CombineDecided ;
}
// arrive here when Solution Intervals are separated by an opening on the curve.
// See if curves are coincident throughout the solution opening
// get SolutionOpening = curve parameter intervals from lastSol->End to nextSol->Start
SmExtent1d sIvl1, sIvl2, sIvl3 ;
sIvl1.AddValue((*pLastEnd)[0]) ; sIvl1.AddValue(rCurrStart[0]);
sIvl2.AddValue((*pLastEnd)[1]) ; sIvl2.AddValue(rCurrStart[1]);
sIvl3.AddValue((*pLastEnd)[2]) ; sIvl3.AddValue(rCurrStart[2]);
// Evaluate and Drop a Curve1 SolutionOpening MidPoint to Surface
SmPoint3d sPtOn1 ;
SmPoint2d sGuess, sParam;
double dParam, dDist;
SmBoolean bSuccess;
SmBoolean bIsMulti;
for(jj=0;jj<2;jj++)
{
dParam = .33 * (jj+1) ; // test CurveGap params [.33 .66]
SER(crCurve.EvaluatePoint(sIvl1.Evaluate(dParam),sPtOn1));
sGuess.Set(sIvl2.Evaluate(dParam), sIvl3.Evaluate(dParam)) ;
SER(crSurface.DropPoint(sPtOn1, crUVDomain, &sGuess, bSuccess, sParam, dDist, bIsMulti));
// don't combine solutions when SolutionGap MidPoint does not drop or is too far away
if( !bSuccess
|| dDist > dDistanceTolerance)
{ bDoCombine = FALSE;
goto CombineDecided ;
}
} // end 2 mid-point sample check
// Arrive here when its likely the curves are coincident to
// one another throughout the solutionOpening because their
// MidPoints are within tolerance of each other.
// Assume coincidence when the OpeningSize is small
// (the midPoint tests are sufficient)
// Else assume coincidence when the curve/curve gapSize is less
// than tolerance at any Curve/Curve Gap Maximum within the
// Solution opening. (an extra expensive computation)
// If SolutionOpening Interval is less than 1000th of curve intervals
// assume the curves are coincident between solutions and combine
if ( ( sIvl1.GetLength() < sTSize / 1000.0 )
&& ( ( sIvl2.GetLength() < sUVSize.x / 1000.0 )
|| ( sIvl3.GetLength() < sUVSize.y / 1000.0 ) ) )
{
bDoCombine = TRUE;
goto CombineDecided ;
}
else // SolutionOpening is not very small
{
// We should solve for the max distance of the curve interval
// to the surface - but for now we'll just sample some more points
for(jj=0;jj<3;jj++)
{
// Evaluate and Drop a Curve1 SolutionOpening MidPoint to Surface
double dParameter = .25 * (jj+1) ; // test CurveGap params [.25 .50 .75]
SER(crCurve.EvaluatePoint(sIvl1.Evaluate( dParameter ),sPtOn1));
sGuess.Set(sIvl2.Evaluate( dParameter ), sIvl3.Evaluate( dParameter )) ;
SER(crSurface.DropPoint(sPtOn1, crUVDomain, &sGuess, bSuccess, sParam, dDist, bIsMulti));
// don't combine solutions when SolutionGap MidPoint does not drop or is too far away
if( !bSuccess
|| dDist > dDistanceTolerance)
{ bDoCombine = FALSE;
goto CombineDecided ;
}
}
} // end SolutionOpening is not very small branch
// arrive here after passing the gap between two interval solutions is coincident test
bDoCombine = TRUE;
goto CombineDecided ;
} // end if range solution branch
} // end test for merging solutions section
// continue here after deciding whether to combine current and last solutions
CombineDecided:
// when pair of solutions are marked for combining
if (bDoCombine)
{
// Expand rLastSol interval to cover rCurrSol interval
if (rCurrSol.m_eSolutionType == SM_ST_RANGE_OF_VALUES)
{
SM_ASSERT(rLastSol.m_eSolutionType == SM_ST_RANGE_OF_VALUES) ;
if (rLastSol.m_vEnd[0] < rCurrSol.m_vEnd[0])
{
rLastSol.m_vEnd = rCurrSol.m_vEnd;
}
SM_ASSERT(rLastSol.m_vStart[0] < rCurrSol.m_vStart[0]) ;
}
else // working with point solutions
{
// when combining a point solution we could
// get the average solution but for now,
// just use the better solution
if ( rCurrSol.m_vStart.m_dSolutionValue < pLastEnd->m_dSolutionValue )
{
rLastSol = rCurrSol ;
}
else
{
// take no action - which throws away rCurrSol
// same thing as combining rLastSol and rCurrSol by
// keeping just rLastSol.
}
}
} // end bDoCombine == TRUE branch
else // bDoCombine == FALSE branch
{
// Keep the current solution but squeeze it down
// into the rSolutions array to keep the rSolutions array packed
*pLastIndex = lLastIntervalIndex == SM_BIG_ULONG ? lLastPointIndex + 1
: lLastPointIndex == SM_BIG_ULONG ? lLastIntervalIndex + 1
: smos_Max(lLastIntervalIndex, lLastPointIndex) + 1 ;
if(*pLastIndex != ii)
{ rSolutions.SetAt(*pLastIndex, rCurrSol); }
} // end bDoCombine == FALSE branch
// // GWC: OBSOLETE SECTION
// // when its likely that two solution segments are coincident
// if (bDoCombine)
// {
// SmSolution & sLastSolution = rSolutions[lProcessedEnd];
// SmSolution & rCurrSolution = rSolutions[ii];
//
// // See if we need to make an interval or just a single point
// sLastSolution.m_eSolutionType = SM_ST_RANGE_OF_VALUES;
//
// // When ThisSol is a Range
// if (rCurrSolution.m_eSolutionType == SM_ST_RANGE_OF_VALUES)
// {
// // Set last Solution to be a range that includes ThisSol range
// if (!bSwapEnds) // when bSwapEnds == TRUE because of tolerances, no
// // need to modify LastSolEnd - its already big enough.
// {
// sLastSolution.m_vEnd = rCurrSolution.m_vEnd;
// if (sLastSolution.m_vStart[0] > sLastSolution.m_vEnd[0])
// {
// SER(SM_ERR);
// }
// }
// } // end ThisSol is a range branch
// else // ThisSolution is a point solution
// {
// // When LastSolStart/ThisSolStart are the same point in CurveDomain
// SmBoolean bSamePoint = smos_Fabs(sLastSolution.m_vStart[0]-rCurrSolution.m_vStart[0]) < SM_EFF_ZERO_SQRT ;
// if(bSamePoint)
// {
// // Check LastSol/ThisSol CurvePoint 3d Distance
// SmPoint3d sCurvePoint1, sCurvePoint2 ;
// crCurve.EvaluatePoint(sLastSolution.m_vStart[0], sCurvePoint1) ;
// crCurve.EvaluatePoint(rCurrSolution.m_vStart[0], sCurvePoint2) ;
// double dDist = sCurvePoint1.DistanceBetween(sCurvePoint2) ;
// double dScaledZero = 100.0 * SM_EFF_ZERO * (1.0 + sCurvePoint1.GetMaxDimension()) ;
// bSamePoint = dDist < dScaledZero
// ? TRUE
// : FALSE ;
// } // end SolCurvePoint 3d Dist
//
// // When LastSolStart/NextSolStart points are the same - make 1 point solution
// if (bSamePoint)
// {
// sLastSolution.m_eSolutionType = SM_ST_SINGLE_VALUE;
// }
// else // expand LastSol range to include ThisSolPoint
// {
// sLastSolution.m_vEnd = rCurrSolution.m_vStart;
// // If have opposite sorting because of tolerancing
// // swap the ends of sLastSolution.
// if (sLastSolution.m_vStart[0] > sLastSolution.m_vEnd[0])
// {
// SmSolutionEnd sTmpEnd = sLastSolution.m_vEnd;
// sLastSolution.m_vEnd = sLastSolution.m_vStart;
// sLastSolution.m_vStart = sTmpEnd;
// }
// } // end expand LastSol range to include ThisSol Point branch
// } // end ThisSol is a point branch
// } // end bDoCombine branch
// else // bDoCombine == FALSE branch
// {
// // Save this Solution, make it the last processed solution.
// // 1. Place solution in lProcessedEnd+1 rSolutions slot
// // 2. Increment the lProcessedEnd index value
// lProcessedEnd ++;
// SmSolution & rCurrSolution = rSolutions[ii];
// rSolutions.SetAt(lProcessedEnd,rCurrSolution);
// }
// GWC: End Obsolete section
} // end iter every solution looking for solutions to combine of same type
// Set rSolutions array Size after all combining has been done.
if (rSolutions.GetSize() > 0)
{
ULONG lLastIndex = lLastIntervalIndex == SM_BIG_ULONG ? lLastPointIndex
: lLastPointIndex == SM_BIG_ULONG ? lLastIntervalIndex
: smos_Max(lLastIntervalIndex, lLastPointIndex) ;
rSolutions.SetSize(lLastIndex+1);
}
#ifdef SM_DEBUG_CODE
if (bDebugMe)
{
rSolutions.Dump();
}
#endif
// Phase 2: remove coincident segments which include or are adjacent to
// point intersections. The assumption here is that nearly
// tangent intersecting curves often will be found to lie
// within a coincident segment. The design choice is to
// keep the intersection point and discard the coincident segment
// Mark every interval solution next-to or containing a point solution for removal
SmTArray<SmBoolean> bCullSolution(rSolutions.GetSize(), NULL, rSolutions.GetSize()) ;
SmBoolean bCompress = FALSE ;
// search for interval solutions
for (ii=0; ii<rSolutions.GetSize(); ii++)
{
SmSolution & rInvSol = rSolutions[ii];
bCullSolution[ii] = FALSE ;
// skip point-solutions solutions
if(rInvSol.m_eSolutionType != SM_ST_RANGE_OF_VALUES)
{ continue; }
SmSolutionEnd &rInvStart = rInvSol.m_vStart ;
SmSolutionEnd &rInvEnd = rInvSol.m_vEnd ;
SmExtent1d sInvSpan1 ; sInvSpan1.AddValue(rInvStart[0]) ; sInvSpan1.AddValue(rInvEnd[0]) ;
SmExtent1d sInvSpan2 ; sInvSpan2.AddValue(rInvStart[1]) ; sInvSpan2.AddValue(rInvEnd[1]) ;
SmExtent1d sInvSpan3 ; sInvSpan2.AddValue(rInvStart[2]) ; sInvSpan2.AddValue(rInvEnd[2]) ;
// search for point solutions within or adjacent to this interval solution
for(jj=0; jj<rSolutions.GetSize(); jj++)
{
if(ii == jj) { continue ; }
SmSolution &rPtSol = rSolutions[jj] ;
// skip interval solutions
if(rPtSol.m_eSolutionType != SM_ST_SINGLE_VALUE) { continue ; }
SmSolutionEnd &rPtStart = rPtSol.m_vStart ;
// Get the cache subdivision intervals containing this point
SmTreeNode *pNode1 = rPtSol.m_apNodes[0] ;
SmTreeNode *pNode2 = rPtSol.m_apNodes[1] ;
// These asserts will cause a crash if violated,
// so get and use Boolean values.
SmBoolean bNode1Valid = (pNode1 && ( pNode1->m_eAuxDataType == SM_AD_BEZIER_CURVE
|| pNode1->m_eAuxDataType == SM_AD_CURVE_DATA)) ;
SmBoolean bNode2Valid = (pNode2 && ( pNode2->m_eAuxDataType == SM_AD_BEZIER_SURFACE
|| pNode2->m_eAuxDataType == SM_AD_BEZIER_SURFACE_HEAD
|| pNode2->m_eAuxDataType == SM_AD_AUX_DATA)) ;
SM_ASSERT( bNode1Valid );
SM_ASSERT( bNode2Valid );
// Note, if these are not valid, then we can't check whether they were
// taken from adjacent nodes or not. In that case, go ahead and check
// the intervals: we'll be able to check by looking at the curve parameters.
if ( bNode1Valid && bNode2Valid )
{
SmExtent1d sPtIvl1 = ((SmBezierAux1d *)pNode1->m_pData)->m_sIvl ;
SmExtent1d sPtIvl2 = ((SmBezierAux2d *)pNode2->m_pData)->GetUVDomain().GetUInterval() ;
SmExtent1d sPtIvl3 = ((SmBezierAux2d *)pNode2->m_pData)->GetUVDomain().GetVInterval() ;
// check for overlap between IntervalSolution Span and PointSubDivision Span
SmExtent1d sXSect1 ;
SmExtent1d sXSect2 ;
SmExtent1d sXSect3 ;
sPtIvl1.Intersect(sInvSpan1, sXSect1) ;
sPtIvl2.Intersect(sInvSpan2, sXSect2) ;
sPtIvl3.Intersect(sInvSpan3, sXSect3) ;
// when InvSpan is adjacent to or contains solution or its sub-division end-points
if( sXSect1.IsInit()
|| sXSect2.IsInit()
|| sXSect3.IsInit())
{ continue; }
}
else
{ SM_ASSERT( FALSE ); } // for breakpoint.
// Now InvSpan is adjacent to or contains solution or its sub-division end-points.
// Check whether this pair really looks like a suspicious range solution.
// The correct behavior might be to delete the point solution instead,
// or not do anything.
//
// (Programming note: this is checked here instead of down below
// because here we have both the range and the point solution.)
// (Also note: this check is the same as in SmCurve::GlobalCurveIntersect().
// It was added there to fix a bug, and here for completeness.)
//
// Unfortunately, we have to get into heuristics here.
// Sometimes when there is a true range solution (or even a point solution),
// the curves will diverge very slowly outside of the solution, and the
// global solver's caching mechanism will pick up an extraneous point
// solution very near the true solution. [B98; my_test_cci_adv()]
// That would be signalled by (heuristics here): the range solution
// is more accurate, and the range solution is relatively long and the
// point solution is very close to it.
// So the heuristics will be:
// - Keep the range solution if it's big enough, and
// - remove the point solution if it's very close to one end of
// the range solution, and has a worse deviation.
// Delete the range interval only if it's 'short': 1/1000 of the whole domain.
double dCloseParam = crInterval.GetLength() / 1000;
if ( sInvSpan1.GetLength() < dCloseParam )
{
// Delete the range interval.
bCullSolution[ii] = TRUE;
bCompress = TRUE;
}
else
{
// Range is long enough. See about deleting the point solution.
double dPtParam1 = rPtSol.m_vStart[0];
if ( dPtParam1 < sInvSpan1.GetMin() )
{
double dDist = sInvSpan1.GetMin() - dPtParam1;
if ( dDist < dCloseParam )
{
if ( rPtSol.m_vStart.m_dSolutionValue > 2.0 * rInvStart.m_dSolutionValue )
{
// Delete the point sol.
bCullSolution[jj] = TRUE;
bCompress = TRUE;
}
}
}
else if ( dPtParam1 > sInvSpan1.GetMax() )
{
double dDist = dPtParam1 - sInvSpan1.GetMax();
if ( dDist < dCloseParam )
{
if ( rPtSol.m_vStart.m_dSolutionValue > 2.0 * rInvEnd.m_dSolutionValue )
{
// Delete the point sol.
bCullSolution[jj] = TRUE;
bCompress = TRUE;
}
}
}
else
{
// Point sol is inside the range sol: delete it.
bCullSolution[jj] = TRUE;
bCompress = TRUE;
}
} // end else: range is long enough
#ifdef SM_DEBUG_CODE
if ( bCullSolution[ii] || bCullSolution[jj] ) {
if(bDebugMe)
{
SmSolution &rIvlSolution = rSolutions[ii] ; // interval solution
SmSolution &rPtSolution = rSolutions[jj] ; // point solution
rIvlSolution.Dump();
rPtSolution.Dump();
SmFace *pFace1 = (SmFace *)crSurface.GetFace() ;
SmEdge *pEdge2 = (SmEdge *)crCurve.GetEdge() ;
SmBrep *pBrep1 = pFace1 ? pFace1->GetBrep() : NULL ;
SmBrep *pBrep2 = pEdge2 ? pEdge2->GetBrep() : NULL ;
smgfx_Erase();
smgfx_SetLook(1,2, 0,0,1); if(pBrep1) pBrep1->Draw(TRUE) ; sm_GraphicsLoop() ;
smgfx_SetLook(1,2, 0,1,0); if(pBrep2) pBrep2->Draw(TRUE) ; sm_GraphicsLoop() ;
smgfx_SetLook(3,5, 0,1,1); crSurface.Draw(); sm_GraphicsLoop();
smgfx_SetLook(4,6, 0,1,0); crCurve.Draw(); sm_GraphicsLoop();
smgfx_SetLook(7,8, 1,0,0); rIvlSolution.Draw() ; sm_GraphicsLoop() ;
smgfx_SetLook(7,8, 1,0,0); rPtSolution.Draw() ; sm_GraphicsLoop() ;
sm_GraphicsLoop();
}
}
#endif // SM_DEBUG_CODE
if ( bCullSolution[ii] )
{ break; }
// quit searching when point solutions get past interval solutions
if( rPtStart[0] > sInvSpan1.GetMax()
|| rPtStart[1] > sInvSpan2.GetMax()
|| rPtStart[2] > sInvSpan3.GetMax())
{ break ; }
} // end iter solutions looking for points
} // end iter solutions looking for intervals
// compress the solutions array to remove all unwanted interval solutions
if(bCompress)
{
ULONG lNextIndex = 0 ;
for(ii=0;ii<rSolutions.GetSize();ii++)
{
// omit solutions to drop
if(bCullSolution[ii]) { continue ; }
// move current solution to next open rSolutions array spot
if(ii != lNextIndex)
{ rSolutions[lNextIndex] = rSolutions[ii] ; }
lNextIndex++ ;
} // end iter every solution
// Set rSolutions array Size after discarding unwanted interval solutions is done.
if (rSolutions.GetSize() > 0)
{
rSolutions.SetSize(lNextIndex);
}
} // end need to compress array check
#ifdef SM_DEBUG_CODE
if(bDebugMe)
{
rSolutions.Dump();
}
#endif
// // GWC: OBSOLETE SECTION
// // Here is where we need to do some post processing to see if we have
// // coincidences.
//
// // Let's look through the intersections and see if we have coincidences
// // between them. If we do then we need to combine the coincident
// // segments in some cases. In other cases we may need to split them.
// // In the future we could expand the intersections to cover all
// // areas where the curve is within tolerance of the surface.
//
// SmVector2d sUVSize = crUVDomain.GetSize();
//
// ULONG lProcessedEnd = 0;
//
// // for every rSolution after the 1st
// // - see if it can be combined with the lastProcessed solution
// for (ULONG i=1; i<rSolutions.GetSize(); i++)
// {
// SmBoolean bDoCombine = FALSE;
// SmBoolean bSwapEnds = FALSE;
//
// // now decide if lProcessedEnd solution should be combined with next solution
// // 1. Find solution closest to the last lProcessedEnd solution measuring dist between sol StartPoints
// // 2. Place it in the next SolutionsArray Slot
// // 3. Don't Combine ProcessedEnd/Next sols on opposite sides of a Surface seam
// // 4. Don't Combine ProcessedEnd/Next sols not sharing the same curve param (opposite ends of closed curves)
// // 5. Get ProcessedEnd/NextStart Curve Interval gap.
// // Drop 2 Curve Interval gap NearMidPoints to surface.
// // If both drop assume a coincident interval and Combine,
// // else Don't Combine
// {
// // Get Solution endParameter
// SmSolution & rLastSol = rSolutions[lProcessedEnd];
// SmSolutionEnd * pLastEnd = (rLastSol.m_eSolutionType == SM_ST_RANGE_OF_VALUES)
// ? &rLastSol.m_vEnd
// : &rLastSol.m_vStart;
//
// // init ClosestSolution to this solution (closed curve solutions?)
// ULONG lClosest = i;
// double dScaledZero = SM_EFF_ZERO * (1.0 + smos_Fabs(rSolutions[i].m_vStart[0]));
//
// // for every other solution - Look for other solutions that start where this one starts
// for (ULONG j=i+1; j<rSolutions.GetSize(); j++)
// {
// // when a solution starts at the same CurveParam
// if (smos_Fabs(rSolutions[lClosest].m_vStart[0]-rSolutions[j].m_vStart[0]) < dScaledZero)
// {
// // when OtherStart/LastEnd is closer in SurfUVSpace than ClosestStart/LastEnd UVDist
// double dUDiff1 = smos_Fabs(rSolutions[lClosest].m_vStart[1]-(*pLastEnd)[1]);
// double dVDiff1 = smos_Fabs(rSolutions[lClosest].m_vStart[2]-(*pLastEnd)[2]);
// double dUDiff2 = smos_Fabs(rSolutions[j].m_vStart[1]-(*pLastEnd)[1]);
// double dVDiff2 = smos_Fabs(rSolutions[j].m_vStart[2]-(*pLastEnd)[2]);
//
// if (dUDiff2+dVDiff2 < dUDiff1+dVDiff1)
// {
// // make ThisSolution the closest solution
// lClosest = j;
// }
// }
// else // quit at the first worst solution
// { break; }
// } // end iter every otherSolution matching up endPoints
//
// // when a closer OtherSolution was found - place it in the next SolutionsArray Slot
// if (lClosest != i)
// {
// // Swap lClosest and i - the original sorting order was messed up
// SmSolution sTmpSol = rSolutions[lClosest];
// rSolutions[lClosest] = rSolutions[i];
// rSolutions[i] = sTmpSol;
// }
//
// // get current Solution StartParam
// SmSolution & rCurrSol = rSolutions[i];
// SmSolutionEnd & sCurrStart = rCurrSol.m_vStart;
//
// // Don't allow jumping over seam -
// // detect seam jumping by large UVdistances between matched endPoints
//
// // Get UVDist Vector between Surface solution endPoints
// SmVector2d sUVDiff(smos_Fabs(sCurrStart[1]-(*pLastEnd)[1]),
// smos_Fabs(sCurrStart[2]-(*pLastEnd)[2]) );
//
// // Get TDist between Curve solution endPoints
// double sTDiff = smos_Fabs(sCurrStart[0]-(*pLastEnd)[0]);
//
// // when the Surface endPoints are separated by the domain space
// // and the Curve endPoints are coincident
// if( ( smos_Fabs(sUVDiff.x-sUVSize.x) < SM_EFF_ZERO_SQRT
// || smos_Fabs(sUVDiff.y-sUVSize.y) < SM_EFF_ZERO_SQRT)
// && (sTDiff < SM_EFF_ZERO_SQRT))
// {
// // don't connect solutions across Surface seams
// bDoCombine = FALSE ;
// goto CombineDecided ;
// }
//
// // When the Curve solution endPoints are not near zero to one another
//
// // when Last/Next solutions are not close on the Curve
// if ((*pLastEnd)[0] > sCurrStart[0]+SM_EFF_ZERO_SQRT)
// { // Have a case of curve falling along seam or something
// // nasty like that - don't combine
// bDoCombine = FALSE;
// goto CombineDecided ;
// }
//
// // see if interval from LastEnd to NextStart is coincident
//
// // remember when LastEnd is Greater than CurrentStart (overlapping solutions)
// if ((*pLastEnd)[0] > sCurrStart[0])
// { bSwapEnds = TRUE;
// }
//
// // get LastEnd to CurrStart Curve Interval
// SmExtent1d sIvl1((*pLastEnd)[0]);
// sIvl1.AddValue(sCurrStart[0]);
//
// // get LastEnd's associated surface UVPoint
// SmPoint2d sUVPnt((*pLastEnd)[1], (*pLastEnd)[2]);
//
// // Drop CurveInterval Near MidPoint to Surface
// SmPoint3d sPtOn1;
// SmSolution sSolData[16];
// SmSolutionArray sSolutions(16,sSolData);
// SER(crCurve.EvaluatePoint(sIvl1.Evaluate(0.45678),sPtOn1));
// SER(GlobalPointSolve(crUVDomain, SM_SO_INTERSECT,
// sPtOn1, dDistanceTolerance,
// NULL, SM_SR_ALL, sSolutions));
//
// // Skip combining when Curve LastEnd/NextStart Interval NearMidPoints not dropping to surface
// if (sSolutions.GetSize() < 1)
// { // don't combine solutions separated by a nonCoincident Curve Gap
// bDoCombine = FALSE;
// goto CombineDecided ;
// }
//
// // when Curve LastEnd/NextStart Interval near midPoint dropped to Surface
// // drop 2nd LastEnd/NextStart Interval near midPoint to surface
// SER(crCurve.EvaluatePoint(sIvl1.Evaluate(0.65432),sPtOn1));
// SER(GlobalPointSolve(crUVDomain,SM_SO_INTERSECT,
// sPtOn1, dDistanceTolerance,
// NULL, SM_SR_ALL, sSolutions));
//
// // Skip combining when Curve LastEnd/NextStart Interval NearMidPoints not dropping to surface
// if (sSolutions.GetSize() < 1)
// { // don't combine solutions separated by a nonCoincident Curve Gap
// bDoCombine = FALSE;
// goto CombineDecided ;
// }
//
// // when 2 LastEnd/ThisStart CurveInterval near midPoints drop to Surface
// // assume LastEnd/ThisStart CurveInterval is coincident to Surface and
// // combine solutions
// bDoCombine = TRUE;
// } // end decide to combine block
//
// // continue here after deciding whether to combine current and last solutions
// CombineDecided:
//
// // when its likely that two solution segments are coincident
// if (bDoCombine)
// {
// SmSolution & sLastSolution = rSolutions[lProcessedEnd];
// SmSolution & rCurrSolution = rSolutions[i];
//
// // See if we need to make an interval or just a single point
// sLastSolution.m_eSolutionType = SM_ST_RANGE_OF_VALUES;
//
// // When ThisSol is a Range
// if (rCurrSolution.m_eSolutionType == SM_ST_RANGE_OF_VALUES)
// {
// // Set last Solution to be a range that includes ThisSol range
// if (!bSwapEnds) // when bSwapEnds == TRUE because of tolerances, no
// // need to modify LastSolEnd - its already big enough.
// {
// sLastSolution.m_vEnd = rCurrSolution.m_vEnd;
// if (sLastSolution.m_vStart[0] > sLastSolution.m_vEnd[0])
// {
// SER(SM_ERR);
// }
// }
// } // end ThisSol is a range branch
// else // ThisSolution is a point solution
// {
// // When LastSolStart/ThisSolStart are the same point in CurveDomain
// SmBoolean bSamePoint = smos_Fabs(sLastSolution.m_vStart[0]-rCurrSolution.m_vStart[0]) < SM_EFF_ZERO_SQRT ;
// if(bSamePoint)
// {
// // Check LastSol/ThisSol CurvePoint 3d Distance
// SmPoint3d sCurvePoint1, sCurvePoint2 ;
// crCurve.EvaluatePoint(sLastSolution.m_vStart[0], sCurvePoint1) ;
// crCurve.EvaluatePoint(rCurrSolution.m_vStart[0], sCurvePoint2) ;
// double dDist = sCurvePoint1.DistanceBetween(sCurvePoint2) ;
// double dScaledZero = 100.0 * SM_EFF_ZERO * (1.0 + sCurvePoint1.GetMaxDimension()) ;
// bSamePoint = dDist < dScaledZero
// ? TRUE
// : FALSE ;
// } // end SolCurvePoint 3d Dist
//
// // When LastSolStart/NextSolStart points are the same - make 1 point solution
// if (bSamePoint)
// {
// sLastSolution.m_eSolutionType = SM_ST_SINGLE_VALUE;
// }
// else // expand LastSol range to include ThisSolPoint
// {
// sLastSolution.m_vEnd = rCurrSolution.m_vStart;
// // If have opposite sorting because of tolerancing
// // swap the ends of sLastSolution.
// if (sLastSolution.m_vStart[0] > sLastSolution.m_vEnd[0])
// {
// SmSolutionEnd sTmpEnd = sLastSolution.m_vEnd;
// sLastSolution.m_vEnd = sLastSolution.m_vStart;
// sLastSolution.m_vStart = sTmpEnd;
// }
// } // end expand LastSol range to include ThisSol Point branch
// } // end ThisSol is a point branch
// } // end bDoCombine branch
// else // bDoCombine == FALSE branch
// {
// // Save this Solution, make it the last processed solution.
// // 1. Place solution in lProcessedEnd+1 rSolutions slot
// // 2. Increment the lProcessedEnd index value
// lProcessedEnd ++;
// SmSolution & rCurrSolution = rSolutions[i];
// rSolutions.SetAt(lProcessedEnd,rCurrSolution);
// }
//
// } // end iter every solution looking for solutions to combine
//
// // Set rSolutions array Size after all combining has been done.
// if (rSolutions.GetSize() > 0)
// {
// rSolutions.SetSize(lProcessedEnd+1);
// }
// // GWC: END OBSOLETE SECTION
#ifdef SM_DEBUG_CODE
if(bDebugMe)
{
rSolutions.Dump();
}
#endif
// check each coincident interval solution to see if it should be treated as a point solution
// if the interval is very short
// then change it into a point solution
// if One end solutionValue is zero and
// the GapFunction diverges at greater than linear rate
// to the other end and the other end solution
// is near tolerance - assume this is a 'coincident maybe' segment
// then replace the interval with a point solution.
// if the interval contains a local curve/curve distance minimum
// or an exact intersection
// then split the interval at that point of interest.
//
SmBoolean bDone2 = FALSE;
while (!bDone2)
{
// We are done unless we split something.
bDone2 = TRUE;
// locals: curve/solution metrics
double dLength = SM_BIG_DOUBLE ;
double dSegLeng = SM_BIG_DOUBLE ;
SmBoolean bLargeInterval = FALSE ;
SmBoolean bSmallInterval = FALSE ;
SmBoolean bIsDegenerate = FALSE ;
// for every SM_ST_RANGE_OF_VALUES solution
for (ii=0; ii<rSolutions.GetSize(); ii++)
{
SmSolution & rCurrSol = rSolutions[ii];
// skip SM_ST_SINGLE_VALUE solutions
if (rCurrSol.m_eSolutionType != SM_ST_RANGE_OF_VALUES)
{ continue; }
// locals - intersection StartPoint, Start/End Deviations, Interval ParameterLengths
SmPoint3d sPnt;
double dDevStart = rCurrSol.m_vStart.m_dSolutionValue;
double dDevEnd = rCurrSol.m_vEnd.m_dSolutionValue;
SmExtent1d sIvl (rCurrSol.m_vStart[0]) ;
SmExtent2d sReg(SmPoint2d(rCurrSol.m_vStart[1],rCurrSol.m_vStart[2])) ;
sIvl.AddValue(rCurrSol.m_vEnd[0]) ;
sReg.AddPoint2d(SmPoint2d(rCurrSol.m_vEnd[1],rCurrSol.m_vEnd[2])) ;
double dIvlLength = sIvl.GetLength() ;
double dRegLength = sReg.GetSize().Length() ;
SER(crCurve.EvaluatePoint(rCurrSol.m_vStart[0],sPnt));
// locals: Curve 3d and solution range lengths
if(dLength == SM_BIG_DOUBLE) { dLength = crCurve.ApproximateLength(crInterval,5); }
dSegLeng = crCurve.ApproximateLength(sIvl,5);
// Scaled Zeros in 3D and both Parameter Spaces
double dScaledZero = SM_EFF_ZERO * (1.0 + sPnt.GetMaxDimension());
double dScaledPSTol = 100.0 * SM_EFF_ZERO * (1.0 + crInterval.GetMaxDimension()) ;
double dScaledPSTol2 = 100.0 * SM_EFF_ZERO * (1.0 + crUVDomain.GetMaxDimension()) ;
// keep nonZero intervals whose ends are exact intersections to ScaledZero
if ( dDevStart < dScaledZero
&& dDevEnd < dScaledZero
&& dIvlLength > dScaledPSTol
&& dRegLength > dScaledPSTol2)
{ continue; }
// See if solution range is a large interval
// if it is at least 1/10 the length of the shorter curve.
bLargeInterval = dSegLeng > dLength/10.0 ;
// See if solution range is a small interval
// if it is less than ScaledZero in either curve domain
bSmallInterval = ( (dIvlLength < dScaledPSTol)
|| (dRegLength < dScaledPSTol2))
? TRUE
: FALSE ;
// for nonDegenerate intervals
if(!bSmallInterval)
{
// if GapVector is diverging over length of solution range
// change solution to type SM_ST_SINGLE_VALUE for a tangent point intersection
// note: side effect: rCurrSol.m_vStart is modified when bIsDegenerate == TRUE
crSurface.ClassifyIntersectingRangeSolution(crCurve,
rCurrSol,
dDistanceTolerance,
bIsDegenerate,
rCurrSol.m_vStart) ;
}
// keep interval if it is at least 1/10 the length of the shorter curve.
if ( bLargeInterval
&& !bIsDegenerate)
{
// gwc: This keep intervals 1/10th the length heuristic
// was here before the addition of the
// ClassifyIntersectingRangeSolution() check.
// Signal when these two heuristics differ so that
// we can come back and analyze when this heuristic should
// be used if ever.
continue;
}
// Change very small and diverging intervals into a single pt solutions.
if ( bSmallInterval
|| bIsDegenerate)
{
// load the solution with smallest deviation into m_vStart
if (rCurrSol.m_vStart.m_dSolutionValue > rCurrSol.m_vEnd.m_dSolutionValue)
{ rCurrSol.m_vStart = rCurrSol.m_vEnd; }
// change the solutionType
rCurrSol.m_eSolutionType = SM_ST_SINGLE_VALUE;
continue;
} // end interval small enough to be changed into a point solution check
/* // gwc: don't need to split intervals because we replace all
// interval solutions with DropAndTrimCurve() solutions in the next section
// NOTE: on second reading - I see that we don't always replace all interval
// solutions with DropAndTrimCurve() solutions. When the maximum curve/surface
// distance is found to exceed tolerance, then the current interval solutions
// are returned as the output. We may have to add this section back into the
// code. For now, leave it out until we can run prog_test.
// Check to see if there is a
// minimum value where the solution needs to be split.
// if we found a minimum and it is less than 1/2 of the end
// values then we will call it a splitting value
double dSplit1, dSplit2, dSplit3;
double dSplitDev;
SmBoolean bSplit = FALSE;
// when endDeviations are larger than zero
if ( dDevStart > dScaledZero
&& dDevEnd > dScaledZero)
{
SmSolution sMinSolution;
SmBoolean bFoundSolution = FALSE;
// look for a local distance minimum within this interval
SER(LocalCurveSolve(sReg, crCurve, sIvl,
SM_SO_MINIMIZE, dDistanceTolerance,
NULL, NULL,
sReg.Evaluate(0.5, 0.5), sIvl.Evaluate(0.5),
bFoundSolution, sMinSolution));
// when a solution with a better deviation than endPoint deviations was found
if ( bFoundSolution
&& sMinSolution.m_vStart.m_dSolutionValue
< smos_Min(dDevStart,dDevEnd)/2.0)
{
// set the split values and split flag
dSplit1 = sMinSolution.m_vStart[0];
dSplit2 = sMinSolution.m_vStart[1];
dSplit3 = sMinSolution.m_vStart[2];
dSplitDev = sMinSolution.m_vStart.m_dSolutionValue;
bSplit = TRUE;
} // end found a tighter local distance point check
} // end endDeviation larger than zero check
// If either end deviation is greater than zero
// then split interval near any interior intersections near nonZero deviation.
if ( !bSplit
&& ( dDevStart > dScaledZero
|| dDevEnd > dScaledZero))
{
// let guesses = largest deviation end solution
double dGuess1, dGuess2, dGuess3;
if (dDevStart > dDevEnd) { dGuess1 = rCurrSol.m_vStart[0];
dGuess2 = rCurrSol.m_vStart[1];
dGuess3 = rCurrSol.m_vStart[2];
}
else { dGuess1 = rCurrSol.m_vEnd[0];
dGuess2 = rCurrSol.m_vEnd[1];
dGuess3 = rCurrSol.m_vEnd[2];
}
// LocalCurveIntersect Locals
SmBoolean bFound;
double dMyParam, dDeviation;
SmPoint2d sUVParam ;
// look for an intersecton
SER(LocalCurveIntersect(sReg, crCurve, sIvl, dDistanceTolerance,
SmPoint2d(dGuess2, dGuess3), dGuess1,
bFound, sUVParam, dMyParam, dDeviation));
if ( bFound
&& dDeviation < smos_Min(dDevStart,dDevEnd) / 2.0)
{
// Only split if the split point is not on the end of the curve
double dSegDist = sIvl.GetMax() - sIvl.GetMin();
if ( dMyParam > sIvl.GetMin() + dSegDist/100.0
&& dMyParam < sIvl.GetMax() - dSegDist/100.0)
{
// set the split values and flag
dSplit1 = dMyParam;
dSplit2 = sUVParam.x ;
dSplit3 = sUVParam.y ;
dSplitDev = dDeviation;
bSplit = TRUE;
} // end new solution not on end of interval check
} // end found an intersection with smaller deviations check
} // end endDeviation larger than zero and not yet split check
// Split the rCurrSol and put the new solution before rCurrSol
// Then quit and start loop again.
if (bSplit)
{
// make a nwe solution copy of the current solution
SmSolution sNewSol = rCurrSol;
// trim current solution interval to [SplitPoint, End]
rCurrSol.m_vStart[0] = dSplit1;
rCurrSol.m_vStart[1] = dSplit2;
rCurrSol.m_vStart[2] = dSplit3;
rCurrSol.m_vStart.m_dSolutionValue = dSplitDev;
// make new solution interval [Start, SplitPoint]
sNewSol.m_vEnd[0] = dSplit1;
sNewSol.m_vEnd[1] = dSplit2;
sNewSol.m_vEnd[2] = dSplit3;
sNewSol.m_vEnd.m_dSolutionValue = dSplitDev;
// Add new solution to rSolutions array in front of current solution
rSolutions.InsertAt(ii,sNewSol,1);
// restart the coincident segment check loop
bDone2 = FALSE;
break;
} // end split requested check
*/ // end removed split intervals section because interval solutions are going to be replaced
} // end iter every interval solution looking for cases to be turned into point solutions
} // end while (!bDone2)
// Replace coincident curve/surface solutions with dropCurve Solutions
// gwc: I suspect this is needed to accurately find trim points for coincident
// curves. The Local solver finds a point of intersection
// somewhere within each leaf node of the curve's subdivision intervals.
// These points do not necessarily mark the boundaries where the curve
// meanders beyond the surface's domain boundaries.
//
// 1. Save Far From Tangent Point solutions
// 2. Drop Curve to Surface within dDistanceTolerance with DropAndTrimCurve()
// 3. If Curve fails to Drop - use current Solution set and return
// else replace current solutions with
// a. Saved Far From Tangent Point Solutions plus
// b. an intervalSolution for every DroppedAndTrimmed Curve Segment.
// and return.
// for every solution - look for a NonDegenerate RangeOfValues solution
for (ii=0; ii<rSolutions.GetSize() && bFoundCoincidence == FALSE; ii++)
{
SmSolution & rSol = rSolutions[ii];
if (rSol.m_eSolutionType == SM_ST_RANGE_OF_VALUES)
{
if (rSol.m_vEnd[0]-rSol.m_vStart[0] > 0.02 * crInterval.GetLength())
{
bFoundCoincidence = TRUE;
}
}
} // end iter every solution looking for a NonDegenerate RangeOfValues solution
// when a coincident point solution or a NonDegenerate RangeOfValues solution was found
if (bFoundCoincidence)
{
// place all FarFromTangent Point Solutions on TmpArray
SmSolution sTmpData[16];
SmSolutionArray sTmpSols(16,sTmpData);
// for every SM_ST_SINGLE_VALUE solution
for (ULONG iii=0; iii<rSolutions.GetSize(); iii++)
{
SmSolution & rSol = rSolutions[iii];
if (rSol.m_eSolutionType == SM_ST_SINGLE_VALUE)
{
// gwc: we could modify this section to use the following check
// and keep all non SM_TC_COINCIDENT solutions
// // for solutions which are further apart
// // see if points bound a coincident segment region
// sCurrentUV.Set(rSolutions[0].m_vStart[1], rSolutions[0].m_vStart[2]) ;
// dCurrentT = rSolutions[0].m_vStart[0] ;
// sm_ClassifyCurveSurfaceXSectPoint(*this, crUVDomain,
// crCurve, crInterval,
// sCurrentUV, dCurrentT,
// bFoundGuess, sNewUVGuess, dNewTGuess,
// ePointType) ;
// if(ePointType != SM_TC_COINCIDENT)
// {
// sTmpSols.Add(rSol);
// }
// Keep Curve/Surface through intersections
// (CurveTangent/SurfaceNormal angle > 2.0 degrees)
SmVector3d sPV[2]; // sPV[0] = crCurve 3dPoint
// sPV[1] = crCurve 3dTangent
SER(crCurve.Evaluate(rSol.m_vStart[0],1,TRUE,sPV,TRUE)); // NonZeroTangent values
SmPoint2d sUV(rSol.m_vStart[1],rSol.m_vStart[2]);
SmVector3d sNormal;
SER(crSurface.EvaluateNormal(sUV,TRUE,TRUE,sNormal));
if (!sPV[1].IsPerpendicularTo(sNormal,2.0))
{
// place intersection in tmpOutput
sTmpSols.Add(rSol);
}
}
} // end keeping every NONRangeOfValues Solution not tangent with the surface
// drop curve locals
SmTArray<SmBSplineCurve*> sUVCurves;
SmObjsDelete<SmBSplineCurve*> sUVClean(&sUVCurves);
double dDistToSurface, dDeviation;
const SmBSplineCurve* pBSC = SM_CAST_NONNULL_PTR(SmBSplineCurve, &crCurve);
// drop and trim the 3DCurve to the Surface
SER(crSurface.DropAndTrimCurve(*crSurface.GetContext(), crUVDomain, *pBSC, crInterval, dDistanceTolerance,
dDistToSurface, dDeviation, sUVCurves, TRUE, TRUE));
//Potential solution to CrvOnSurf edge curve (suspect)
//const SmCurve * pC = &crCurve;
//// drop and trim the 3DCurve to the Surface
//SER(crSurface.DropAndTrimCurve(*crSurface.GetContext(), crUVDomain,
// *pC, crInterval, dDistanceTolerance,
// dDistToSurface, dDeviation, sUVCurves, TRUE, TRUE ));
// when the curve/surface 3dDistance is beyond tolerance
if (dDistToSurface > dDistanceTolerance)
{
// exit - using all the solutions already in sSolutions array as the output.
return SM_SUCCESS;
}
// else when the DropAndTrimCurve DistToSurface is within tolerance
// add a range solution to sTmpSols for every DropAndTrimCurve output curve
// and use sTmpSols as the output.
// for every projection curve segment
for (ULONG jjj=0; jjj<sUVCurves.GetSize(); jjj++)
{
// add a RangeOfValues solution to the tmpOutput
SmCurve *pUVCurve = sUVCurves[jjj];
SmExtent1d sIvl = pUVCurve->GetNaturalInterval();
SmSolution sSol;
sSol.m_lNumVariables = 3;
sSol.m_lNumObjects = 2;
sSol.m_apObjects[0] = (SmObject *)&crCurve ;
sSol.m_apObjects[1] = (SmObject *)&crSurface ;
sSol.m_eSolutionType = SM_ST_RANGE_OF_VALUES;
SmPoint3d sPnt;
SER(pUVCurve->EvaluatePoint(sIvl.GetMin(),sPnt));
sSol.m_vStart.m_dSolutionValue = dDistToSurface;
sSol.m_vStart[0] = sIvl.GetMin();
sSol.m_vStart[1] = sPnt.x;
sSol.m_vStart[2] = sPnt.y;
SER(pUVCurve->EvaluatePoint(sIvl.GetMax(),sPnt));
sSol.m_vEnd.m_dSolutionValue = dDistToSurface;
sSol.m_vEnd[0] = sIvl.GetMax();
sSol.m_vEnd[1] = sPnt.x;
sSol.m_vEnd[2] = sPnt.y;
sTmpSols.Add(sSol);
} // end making every dropCurve solution a RangeOfValues solution
// When curve dropped to surface - replace rSolutions with TmpSols
if (sUVCurves.GetSize() != 0)
{
rSolutions.ReSet();
rSolutions.Append(sTmpSols);
}
return SM_SUCCESS;
} // end a Coincident point or NonDegenerate RangeOfValues solution was found check
#ifdef SM_DEBUG_CODE
if (bDebugMe)
{ rSolutions.Dump() ; }
#endif
// all done
return SM_SUCCESS ;
} // end sm_GlobalCurveIntersectCombineSolutions
// ---- end verbatim
// clang-format on
} // namespace sc_srf_p10
namespace
{
struct Bad : std::runtime_error
{
Bad() : std::runtime_error("bad program") {}
};
struct Rd
{
const double* in;
int64_t n;
int64_t at;
double num()
{
if (at >= n)
throw Bad();
return in[at++];
}
int64_t idx(int64_t lo, int64_t hi)
{
double d = num();
if (!(d >= (double)lo && d <= (double)hi) || d != (double)(int64_t)d)
throw Bad();
return (int64_t)d;
}
bool flag() { return idx(0, 1) != 0; }
SmVector3d vec()
{
double x = num();
double y = num();
double z = num();
return SmVector3d(x, y, z);
}
SmVector2d uv()
{
double x = num();
double y = num();
return SmVector2d(x, y);
}
SmExtent2d dom4()
{
double a = num();
double b = num();
double c = num();
double d = num();
return SmExtent2d(a, b, c, d);
}
};
// `n m p q r s cpts(x y z w) u v`, sizes checked by the Rust side.
SmBSplineSurface* read_bspline_surface(Rd& rd, const SmContext& ctx)
{
gw_INDEX n = (gw_INDEX)rd.idx(1, 16);
gw_INDEX m = (gw_INDEX)rd.idx(1, 16);
gw_DEGREE p = (gw_DEGREE)rd.idx(1, 8);
gw_DEGREE q = (gw_DEGREE)rd.idx(1, 8);
gw_INDEX r = (gw_INDEX)rd.idx(3, 40);
gw_INDEX s = (gw_INDEX)rd.idx(3, 40);
if (p > n || q > m || r != n + p + 1 || s != m + q + 1)
throw Bad();
std::vector<double> v;
for (int64_t i = 0; i < 4 * (n + 1) * (m + 1) + r + 1 + s + 1; i++)
v.push_back(rd.num());
gw_SURFACE* sur = sm_AllocateNurbSurface(n, m, p, q, r, s);
size_t k = 0;
for (gw_INDEX i = 0; i <= n; i++)
for (gw_INDEX j = 0; j <= m; j++)
{
sur->net->Pw[i][j].x = v[k++];
sur->net->Pw[i][j].y = v[k++];
sur->net->Pw[i][j].z = v[k++];
sur->net->Pw[i][j].w = v[k++];
}
for (gw_INDEX i = 0; i <= r; i++)
sur->knu->U[i] = v[k++];
for (gw_INDEX i = 0; i <= s; i++)
sur->knv->U[i] = v[k++];
return new (ctx) SmBSplineSurface(sur, FALSE, &ctx);
}
// `0 bspline-surface` or `1 o x y scale[2] dom[4]` (SmPlane(o, x, y, scale, dom, ctx)).
SmSurface* read_surface(Rd& rd, const SmContext& ctx)
{
int64_t kind = rd.idx(0, 1);
if (kind == 0)
return read_bspline_surface(rd, ctx);
SmPoint3d o = rd.vec();
SmVector3d x = rd.vec();
SmVector3d y = rd.vec();
SmVector2d s = rd.uv();
SmExtent2d d = rd.dom4();
return new (ctx) SmPlane(o, x, y, s, d, &ctx);
}
// A 3D B-spline curve `n p m cpts(x y z w) knots`.
SmBSplineCurve* read_curve(Rd& rd, const SmContext& ctx)
{
int64_t n = rd.idx(1, 32);
int64_t p = rd.idx(1, 8);
int64_t m = rd.idx(3, 64);
if (p > n || m != n + p + 1)
throw Bad();
std::vector<double> v;
for (int64_t i = 0; i < 4 * (n + 1) + m + 1; i++)
v.push_back(rd.num());
gw_CURVE* cur = sm_AllocateNurbCurve((gw_INDEX)n, (gw_DEGREE)p, (gw_INDEX)m);
for (int64_t i = 0; i <= n; i++)
{
cur->pol->Pw[i].x = v[4 * i];
cur->pol->Pw[i].y = v[4 * i + 1];
cur->pol->Pw[i].z = v[4 * i + 2];
cur->pol->Pw[i].w = v[4 * i + 3];
}
for (int64_t i = 0; i <= m; i++)
cur->knt->U[i] = v[4 * (n + 1) + i];
SmBSplineCurve* c = new (ctx) SmBSplineCurve(3, (ULONG)cur->pol->n, (ULONG)cur->knt->m, (short)cur->p,
cur->pol->Pw, cur->knt->U, &ctx);
smos_Free(cur);
return c;
}
struct TreePeek : SmTree
{
explicit TreePeek(SmObject* owner) : SmTree(owner) {}
SmMemBlockMgr& node_mgr() { return m_sNodeMgr; }
SmTreeNode*& top() { return m_pTopNode; }
};
struct CachePeek : SmSurfaceCache
{
CachePeek(const SmSurface& s, const SmExtent2d& d) : SmSurfaceCache(s, d) {}
SmTree*& tree() { return m_pTree; }
SmMemBlockMgr& bez() { return m_sBezMgr; }
SmMemBlockMgr& aux() { return m_sAuxMgr; }
};
// Cache flags `point_test have_t_surface_cache face_was_modified process_boundary_curves`.
void read_flags(Rd& rd, CachePeek* cache)
{
cache->m_bPointTestEnabled = rd.flag() ? TRUE : FALSE;
cache->m_bHaveTSurfaceCache = rd.flag() ? TRUE : FALSE;
cache->m_bFaceWasModified = rd.flag() ? TRUE : FALSE;
cache->SetProcessBoundaryCurves(rd.flag() ? TRUE : FALSE);
}
// Tree nodes `n` x `parent c1 c2 aux dom[4] class bbox[6] uconts[2] vconts[2] polar pseudo`,
// allocated in order from the tree's node manager (node 0 the top); patches (aux
// SM_AD_BEZIER_SURFACE) from m_sBezMgr, the others from m_sAuxMgr; every mBA_pSurface is the
// cache surface. `polar` is `0` (uninitialised: built on demand) or `1 k vecs[k]` (AddVector3d
// of each); `pseudo` (patches only) is `0` (SmPseudoBox()) or `1 basis[3] k pts[k]`
// (SmPseudoBox(), SetBasis, AddPoint3d of each); the continuities (patches only) are
// SmContinuityType codes.
std::vector<SmTreeNode*> read_tree(Rd& rd, CachePeek* cache, const SmSurface* s, const SmContext& ctx)
{
int64_t n = rd.idx(1, 16);
TreePeek* tree = new (ctx) TreePeek(cache);
tree->node_mgr().Initialize(ALIGN_SIZE(sizeof(SmTreeNode)), 25);
cache->bez().Initialize(ALIGN_SIZE(sizeof(SmBezierPatch)), 25);
cache->aux().Initialize(ALIGN_SIZE(sizeof(SmBezierAux2d)), 25);
cache->tree() = tree;
std::vector<SmTreeNode*> nodes;
for (int64_t k = 0; k < n; k++)
nodes.push_back((SmTreeNode*)tree->node_mgr().GetNewElement());
auto ptr = [&](int64_t k) -> SmTreeNode* { return k < 0 ? nullptr : nodes[(size_t)k]; };
for (int64_t k = 0; k < n; k++)
{
SmTreeNode* nd = nodes[(size_t)k];
nd->m_pTree = tree;
nd->m_pParent = ptr(rd.idx(-1, n - 1));
nd->m_pChild1 = ptr(rd.idx(-1, n - 1));
nd->m_pChild2 = ptr(rd.idx(-1, n - 1));
nd->m_eAuxDataType = (SmAuxDataType)rd.idx(0, 7);
nd->m_eGeomType = SM_NG_DEFAULT;
bool patch = nd->m_eAuxDataType == SM_AD_BEZIER_SURFACE;
SmBezierAux2d* a =
patch ? (SmBezierAux2d*)cache->bez().GetNewElement() : (SmBezierAux2d*)cache->aux().GetNewElement();
a->m_eSplitDir = SM_SP_UNKNOWN;
a->m_bIsMarked = FALSE;
a->m_pFace = NULL;
a->m_sUVDomain = rd.dom4();
a->m_eNodeClass = (SmNodeClassType)rd.idx(0, 3);
a->mBA_pSurface = s;
a->m_pOwningTreeNode = nd;
double b[6];
for (int i = 0; i < 6; i++)
b[i] = rd.num();
nd->m_sBBox = SmExtent3d(b[0], b[1], b[2], b[3], b[4], b[5]);
SmContinuityType uc0 = (SmContinuityType)rd.idx(0, 13);
SmContinuityType uc1 = (SmContinuityType)rd.idx(0, 13);
SmContinuityType vc0 = (SmContinuityType)rd.idx(0, 13);
SmContinuityType vc1 = (SmContinuityType)rd.idx(0, 13);
if (rd.flag())
{
SmPolarBox pb;
int64_t kv = rd.idx(0, 16);
for (int64_t i = 0; i < kv; i++)
pb.AddVector3d(rd.vec());
*const_cast<SmPolarBox*>(a->GetPolarBoxPtr()) = pb;
}
if (patch)
{
SmBezierPatch* bp = (SmBezierPatch*)a;
bp->m_pBezier = NULL;
bp->m_eUCurveConts[0] = uc0;
bp->m_eUCurveConts[1] = uc1;
bp->m_eVCurveConts[0] = vc0;
bp->m_eVCurveConts[1] = vc1;
SmPseudoBox pbox;
if (rd.flag())
{
SmVector3d b1 = rd.vec();
SmVector3d b2 = rd.vec();
SmVector3d b3 = rd.vec();
pbox.SetBasis(b1, b2, b3);
int64_t kp = rd.idx(0, 16);
for (int64_t i = 0; i < kp; i++)
pbox.AddPoint3d(rd.vec());
}
bp->GetPseudoBox() = pbox;
}
nd->m_pData = a;
}
tree->top() = nodes[0];
return nodes;
}
// A solution record `type nvars nobjs start_value start[3] end_value end[3] node0 node1 obj0
// obj1`; nodes are indices into `n0` / `n1` (-1: NULL or not found), objects `0` the curve, `1`
// the surface, `-1` NULL or other.
void put_sol(std::vector<double>& o, const SmSolution& s, const std::vector<SmTreeNode*>& n0,
const std::vector<SmTreeNode*>& n1, const SmObject* curve, const SmObject* surface)
{
o.push_back((double)s.m_eSolutionType);
o.push_back((double)s.m_lNumVariables);
o.push_back((double)s.m_lNumObjects);
o.push_back(s.m_vStart.m_dSolutionValue);
for (int i = 0; i < 3; i++)
o.push_back(s.m_vStart[i]);
o.push_back(s.m_vEnd.m_dSolutionValue);
for (int i = 0; i < 3; i++)
o.push_back(s.m_vEnd[i]);
auto find = [](const std::vector<SmTreeNode*>& ns, const SmTreeNode* p) -> double {
for (size_t i = 0; i < ns.size(); i++)
if (ns[i] == p)
return (double)i;
return -1.0;
};
o.push_back(find(n0, s.m_apNodes[0]));
o.push_back(find(n1, s.m_apNodes[1]));
for (int i = 0; i < 2; i++)
{
const SmObject* p = s.m_apObjects[i];
o.push_back(p != NULL && p == curve ? 0.0 : (p != NULL && p == surface ? 1.0 : -1.0));
}
}
// LSI: `flags tree branch uvdom[4] point[3] vector[3] has_ivl ivl[2] ray dist_tol tol3d`.
void run_lsi(Rd& rd, const SmContext& ctx, SmSurface* srf, std::vector<double>& o)
{
CachePeek* cache = new (ctx) CachePeek(*srf, srf->GetNaturalUVDomain());
read_flags(rd, cache);
std::vector<SmTreeNode*> nodes = read_tree(rd, cache, srf, ctx);
SmTreeNode* node = nodes[(size_t)rd.idx(0, (int64_t)nodes.size() - 1)];
SmExtent2d dom = rd.dom4();
SmPoint3d lp = rd.vec();
SmVector3d lv = rd.vec();
bool has_ivl = rd.flag();
double i0 = rd.num();
double i1 = rd.num();
SmExtent1d ivl(i0, i1);
bool ray = rd.flag();
double dist_tol = rd.num();
double tol3d = rd.num();
{
SmLSIGlobalSolver gs(cache->tree(), dom, lp, lv, has_ivl ? &ivl : NULL, ray ? TRUE : FALSE, dist_tol);
SmSolutionArray sols;
gs.SetSolutions(&sols);
gs.SetSolverOperation(SM_SO_INTERSECT);
gs.Set3DTolerance(tol3d);
gs.SetSolutionRequested(SM_SR_ALL);
SmTreeNode* branch[SM_GS_MAX_TREES] = {NULL};
branch[0] = node;
SmBoolean more = FALSE;
SmStatus r = gs.LocalSolve(branch, more);
o.push_back(st(r));
if (r == SM_SUCCESS)
{
o.push_back(more ? 1.0 : 0.0);
o.push_back((double)sols.GetSize());
std::vector<SmTreeNode*> none;
for (ULONG i = 0; i < sols.GetSize(); i++)
put_sol(o, sols[i], nodes, none, NULL, srf);
}
}
delete cache;
}
// Combine: `curve uvdom[4] ivl[2] tol k_curve_nodes x (aux ivl[2]) surface_tree n_sols x (type
// nvars start_value start[3] end_value end[3] node0 node1)`. The surface tree's cache is over
// the surface's natural domain with default flags.
void run_combine(Rd& rd, const SmContext& ctx, SmSurface* srf, std::vector<double>& o)
{
SmBSplineCurve* crv = read_curve(rd, ctx);
SmExtent2d dom = rd.dom4();
double i0 = rd.num();
double i1 = rd.num();
SmExtent1d ivl(i0, i1);
double tol = rd.num();
int64_t kc = rd.idx(0, 16);
std::vector<SmTreeNode*> cnodes;
std::vector<SmBezierAux1d*> caux;
for (int64_t i = 0; i < kc; i++)
{
SmTreeNode* nd = new SmTreeNode();
SmBezierAux1d* a = new SmBezierAux1d();
nd->m_eAuxDataType = (SmAuxDataType)rd.idx(0, 7);
double a0 = rd.num();
double a1 = rd.num();
a->m_sIvl = SmExtent1d(a0, a1);
nd->m_pData = a;
cnodes.push_back(nd);
caux.push_back(a);
}
CachePeek* cache = new (ctx) CachePeek(*srf, srf->GetNaturalUVDomain());
{
std::vector<SmTreeNode*> snodes = read_tree(rd, cache, srf, ctx);
int64_t ns = rd.idx(0, 64);
SmSolutionArray sols;
for (int64_t i = 0; i < ns; i++)
{
SmSolution s;
s.m_eSolutionType = (SmSolutionType)rd.idx(0, 4);
s.m_lNumVariables = (ULONG)rd.idx(0, 3);
s.m_lNumObjects = 2;
s.m_apObjects[0] = crv;
s.m_apObjects[1] = srf;
s.m_vStart.m_dSolutionValue = rd.num();
for (int j = 0; j < 3; j++)
s.m_vStart[j] = rd.num();
s.m_vEnd.m_dSolutionValue = rd.num();
for (int j = 0; j < 3; j++)
s.m_vEnd[j] = rd.num();
int64_t n0 = rd.idx(-1, (int64_t)cnodes.size() - 1);
int64_t n1 = rd.idx(-1, (int64_t)snodes.size() - 1);
s.m_apNodes[0] = n0 < 0 ? NULL : cnodes[(size_t)n0];
s.m_apNodes[1] = n1 < 0 ? NULL : snodes[(size_t)n1];
sols.Add(s);
}
SmStatus r = sc_srf_p10::sm_GlobalCurveIntersectCombineSolutions(*srf, dom, *crv, ivl, tol, sols);
o.push_back(st(r));
if (r == SM_SUCCESS)
{
o.push_back((double)sols.GetSize());
for (ULONG i = 0; i < sols.GetSize(); i++)
put_sol(o, sols[i], cnodes, snodes, crv, srf);
}
}
delete cache;
for (size_t i = 0; i < cnodes.size(); i++)
{
cnodes[i]->m_pData = NULL;
delete cnodes[i];
delete caux[i];
}
delete crv;
}
} // namespace
SC_EXPORT int32_t sc_surface_surface_p10_run(const double* in, int64_t n_in, double* out, int64_t cap,
int64_t* out_len)
{
if (in == NULL || n_in < 2)
return SC_ERR_ARG;
try
{
SC_NATIVE_LOCK;
SmContext ctx;
std::vector<double> o;
Rd rd{in, n_in, 0};
int64_t op = rd.idx(1, 2);
SmSurface* srf = read_surface(rd, ctx);
if (op == 1)
run_lsi(rd, ctx, srf, o);
else
run_combine(rd, ctx, srf, o);
delete srf;
if (rd.at != rd.n)
return SC_ERR_ARG;
return sc_copy_out(o.data(), (int64_t)o.size(), out, cap, out_len);
}
catch (const Bad&)
{
return SC_ERR_ARG;
}
catch (...)
{
return SC_ERR_EXCEPTION;
}
}
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