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fix(wipeout): bias the mask toward the camera so it wins coincident depth

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Even collected at the right place, a block-internal wipeout still let
geometry show through: the wipeout pipeline's depth bias was positive,
pushing the mask behind geometry at the same depth (a block's wipeout and
its shapes are coincident at Z=0), so LessEqual rejected it. Bias toward
the camera (constant -8, slope -1) so the mask wins against coincident
2-D geometry, small enough that genuinely nearer geometry still occludes.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
This commit is contained in:
Hakan Seven 2026-07-23 23:22:55 +03:00
commit 346f4ce27d
1 changed files with 7 additions and 2 deletions
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9
src/scene/pipeline/mod.rs
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@ -633,9 +633,14 @@ impl Pipeline {
depth_write_enabled: true, depth_write_enabled: true,
depth_compare: wgpu::CompareFunction::LessEqual, depth_compare: wgpu::CompareFunction::LessEqual,
stencil: content_stencil.clone(), stencil: content_stencil.clone(),
// Bias TOWARD the camera: a wipeout must win against geometry at
// its own depth (a block's wipeout + shapes are coincident at
// Z=0). A positive bias pushed the mask behind, so LessEqual
// rejected it and the geometry showed through. Tiny enough that
// meaningfully-nearer geometry still occludes the mask.
bias: wgpu::DepthBiasState { bias: wgpu::DepthBiasState {
constant: 1, constant: -8,
slope_scale: 1.0, slope_scale: -1.0,
clamp: 0.0, clamp: 0.0,
}, },
}), }),