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Custom/extended splat encoding ranges, Premultiplied alpha for hyper-saturated colors (#134)

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* Externalized SparkRenderer.maxPixelRadius and .minAlpha settings. Added to documentation. Added to examples/editor under Debug folder, moved sort32 there.

* Added SplatEncoding concept, applied individually to SparkRenderer (rgbMin/Max, lnScaleMinMax), SplatMesh (additionally sh1Min/Max, sh2, sh3). Updated examples/editor to control settings via gui. Updated all related code to pipe along settings where needed.
Added SparkRenderer.premultipliedAlpha to control blend mode and enable hyper-saturated color contributions by default.

* Fix SplatLoader not passing along encoding. Complete renaming to splat encoding.
This commit is contained in:
Andreas Sundquist
2025-07-23 10:04:24 -07:00
committed by GitHub
parent f4b4522c56
commit f60c2b0cf9
19 changed files with 568 additions and 149 deletions
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rust/spark-internal-rs/src/lib.rs
+3 -2
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@@ -82,6 +82,7 @@ pub fn raycast_splats(
near: f32, far: f32,
num_splats: u32, packed_splats: Uint32Array,
raycast_ellipsoid: bool,
ln_scale_min: f32, ln_scale_max: f32,
) -> Float32Array {
let mut distances = Vec::<f32>::new();
@@ -94,9 +95,9 @@ pub fn raycast_splats(
subarray.copy_to(subbuffer);
if raycast_ellipsoid {
raycast_ellipsoids(subbuffer, &mut distances, [origin_x, origin_y, origin_z], [dir_x, dir_y, dir_z], near, far);
raycast_ellipsoids(subbuffer, &mut distances, [origin_x, origin_y, origin_z], [dir_x, dir_y, dir_z], near, far, ln_scale_min, ln_scale_max);
} else {
raycast_spheres(subbuffer, &mut distances, [origin_x, origin_y, origin_z], [dir_x, dir_y, dir_z], near, far);
raycast_spheres(subbuffer, &mut distances, [origin_x, origin_y, origin_z], [dir_x, dir_y, dir_z], near, far, ln_scale_min, ln_scale_max);
}
base += chunk_size;