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Use polygon offset to fix z-fighting for overlay tiles

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sfan5 2025-01-04 17:51:04 +01:00
parent dfd7628950
commit 5b14c03301
4 changed files with 49 additions and 23 deletions
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10
src/client/mapblock_mesh.cpp
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@ -702,6 +702,16 @@ MapBlockMesh::MapBlockMesh(Client *client, MeshMakeData *data, v3s16 camera_offs
tex.MinFilter = video::ETMINF_NEAREST_MIPMAP_NEAREST;
tex.MagFilter = video::ETMAGF_NEAREST;
});
/*
* The second layer is for overlays, but uses the same vertex positions
* as the first, which quickly leads to z-fighting.
* To fix this we can offset the polygons in the direction of the camera.
* This only affects the depth buffer and leads to no visual gaps in geometry.
*/
if (layer == 1) {
material.PolygonOffsetSlopeScale = -1;
material.PolygonOffsetDepthBias = -1;
}
{
material.MaterialType = m_shdrsrc->getShaderInfo(