Fix web depth/projection regression, causing incorrect rendering on all 3D scenes #2170
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| // True if we're running on Gles/WebGL. | ||
| // (patched accordingly if necessary) | ||
| const GLES = false; |
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I think something like this would be better:
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| // True if we're running on Gles/WebGL. | |
| // (patched accordingly if necessary) | |
| const GLES = false; | |
| // True if we're running on Gles/WebGL. | |
| // Will be set by `re_renderer` during startup | |
| const GLES = ${GLES}; |
That way we cannot accidentally break the patch-code without us noticing it.
…or just pass it in the global uniform buffer
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| // On GLES/WebGL, the NDC clipspace range for depth is from -1 to 1 and y is flipped. | ||
| // wgpu/Naga counteracts this by patching all vertex shader with: |
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| // On GLES/WebGL, the NDC clipspace range for depth is from -1 to 1 and y is flipped. | |
| // wgpu/Naga counteracts this by patching all vertex shader with: | |
| // On GLES/WebGL, the NDC clipspace range for depth is from -1 to 1 (and y is flipped). | |
| // wgpu/Naga counteracts this by patching all vertex shaders with: |
| // This is great, since it means that we can pretend depth is 0 to 1 as specified by WebGPU. | ||
| // But it completely messes up depth precision, in particular since we use | ||
| // an inverse depth projection that tries to make use of the high float precision closer to zero. | ||
| eps *= 1000.0; |
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This doesn't seem like an ideal fix. It seems like flipping this around (like the previous PR did) is better for depth precision, just that we also need to flip the Z test?
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…ll 3D scenes (#2170) * Revert "Fix depth precision issues on WebGL due to different NDC space (#2123)" This reverts commit 4f60fd7. * fudge depth offsets on Webgl * hardware_tier global constant, better depth handling for gles * Improve the depth offset for all platforms --------- Co-authored-by: Emil Ernerfeldt <emil.ernerfeldt@gmail.com>
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Reverts
and fixes the issue with a generous depth factor instead.
#2123 didn't make sense: The assumption was that depth range is -1 to 1 on the Web, but if that was true all our clipping would have been wrong. In actuality, wgpu emulates 0 to 1 range for us but this causes precision issues.
Fixes #2166
This also improves the z offset on all platforms
Checklist
PR Build Summary: https://build.rerun.io/pr/2170