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Implement polygon offset in GL3 driver

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sfan5 2025-01-04 18:10:29 +01:00
parent 5b14c03301
commit 4774e65ed9
2 changed files with 12 additions and 6 deletions
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6
irr/include/SMaterial.h
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@ -304,11 +304,7 @@ public:
//! A constant z-buffer offset for a polygon/line/point
/** The range of the value is driver specific.
On OpenGL you get units which are multiplied by the smallest value that is guaranteed to produce a resolvable offset.
On D3D9 you can pass a range between -1 and 1. But you should likely divide it by the range of the depthbuffer.
Like dividing by 65535.0 for a 16 bit depthbuffer. Thought it still might produce too large of a bias.
Some article (https://aras-p.info/blog/2008/06/12/depth-bias-and-the-power-of-deceiving-yourself/)
recommends multiplying by 2.0*4.8e-7 (and strangely on both 16 bit and 24 bit). */
On OpenGL you get units which are multiplied by the smallest value that is guaranteed to produce a resolvable offset. */
f32 PolygonOffsetDepthBias;
//! Variable Z-Buffer offset based on the slope of the polygon.