Jackson Oursland 8301d1c48e Viewport: whole-body highlights reuse the model's own triangles (#4554) (#5109) ...

Hovering or selecting whole bodies -- a browser row, a History group, a body
under the pointer in body-pick mode -- built a CPU copy of every body's
triangles into the highlight scene. On a 40-body 4.3 MB STEP assembly that was
147 bodies, 70 MB of triangle copies and a 519 ms frame.

The model already has the same geometry on the GPU. The highlight now names it
and the renderer draws it again in the highlight colour:

- bodies drawn from a display plan: the model's evaluated plan chunks, with a
  hover/selection tint uniform (the chunks stay resident in the model scene);
- bodies drawn as placements of shared triangles: the same placements of the
  model's shared triangles, coloured per instance;
- bodies the model builds on the CPU: their vertex range in the model scene's
  block.

See-through and faded bodies keep the CPU feedback, which colours them; faces
and edges highlighted on their own are unchanged. The highlight looks the same
(verified side by side).

On the assembly the highlight build drops from 519 ms to 9 ms and no longer
copies any triangles; selecting the whole assembly takes 9-20 ms.

Co-authored-by: Claude Code <noreply@anthropic.com>

2026-10-23 16:05:41 -04:00

..

viewport.wgsl

Viewport: whole-body highlights reuse the model's own triangles (#4554) (#5109)

2026-10-23 16:05:41 -04:00