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bugfix(pointgroup): Render ground-aligned particles without sorting #2838

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bugfix(pointgroup): Render ground-aligned particles without sorting #2838

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45a97a7
perf: Render ground-aligned particles without sorting
stephanmeesters Jun 27, 2026
8ab6dd2
Clarify bugfix comment, add info comment for volumetric particles
stephanmeesters Jun 30, 2026
f42e0d5
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stephanmeesters Jul 1, 2026
0c4ff29
Technical justification
stephanmeesters Jul 1, 2026
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9 changes: 8 additions & 1 deletion Core/Libraries/Source/WWVegas/WW3D2/pointgr.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -927,7 +927,12 @@ void PointGroupClass::Render(RenderInfoClass &rinfo)
DX8Wrapper::Set_Texture(0,Texture);

// Enable sorting if the primitives are translucent and alpha testing is not enabled.
const bool sort = (Shader.Get_Dst_Blend_Func() != ShaderClass::DSTBLEND_ZERO) && (Shader.Get_Alpha_Test() == ShaderClass::ALPHATEST_DISABLE) && (WW3D::Is_Sorting_Enabled());
// TheSuperHackers @bugfix stephanmeesters 30/06/2026 However, do not apply sorting to ground-aligned particles.
// This improves performance and resolves rendering artifacts caused by clipping between ground-aligned particles and billboard particles.
const bool sort = Billboard &&
Shader.Get_Dst_Blend_Func() != ShaderClass::DSTBLEND_ZERO &&
Shader.Get_Alpha_Test() == ShaderClass::ALPHATEST_DISABLE &&
WW3D::Is_Sorting_Enabled();

IndexBufferClass *indexbuffer;
int verticesperprimitive;/// lorenzen fixed
Expand Down Expand Up @@ -1836,6 +1841,8 @@ void PointGroupClass::RenderVolumeParticle(RenderInfoClass &rinfo, unsigned int
DX8Wrapper::Set_Texture(0,Texture);

// Enable sorting if the primitives are translucent and alpha testing is not enabled.
// TheSuperHackers @info Volumetric particles, both billboarded and ground-aligned, must have sorting enabled to
// ensure accurate alpha-blending because these particles have stacked layers that don't face the camera straight on.
const bool sort = (Shader.Get_Dst_Blend_Func() != ShaderClass::DSTBLEND_ZERO) && (Shader.Get_Alpha_Test() == ShaderClass::ALPHATEST_DISABLE) && (WW3D::Is_Sorting_Enabled());
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IndexBufferClass *indexbuffer;
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