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36 lines
1.4 KiB
C++
36 lines
1.4 KiB
C++
// Luanti
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// SPDX-License-Identifier: LGPL-2.1-or-later
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// Copyright (C) 2010-2013 celeron55, Perttu Ahola <celeron55@gmail.com>
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#include "tile.h"
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void TileLayer::applyMaterialOptions(video::SMaterial &material, int layer) const
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{
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material.setTexture(0, texture);
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material.BackfaceCulling = (material_flags & MATERIAL_FLAG_BACKFACE_CULLING) != 0;
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if (!(material_flags & MATERIAL_FLAG_TILEABLE_HORIZONTAL)) {
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material.TextureLayers[0].TextureWrapU = video::ETC_CLAMP_TO_EDGE;
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material.TextureLayers[1].TextureWrapU = video::ETC_CLAMP_TO_EDGE;
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}
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if (!(material_flags & MATERIAL_FLAG_TILEABLE_VERTICAL)) {
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material.TextureLayers[0].TextureWrapV = video::ETC_CLAMP_TO_EDGE;
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material.TextureLayers[1].TextureWrapV = video::ETC_CLAMP_TO_EDGE;
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}
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/*
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* The second layer is for overlays, but uses the same vertex positions
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* as the first, which easily leads to Z-fighting.
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* To fix this we offset the polygons of the *first layer* away from the camera.
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* This only affects the depth buffer and leads to no visual gaps in geometry.
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*
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* However, doing so intrudes the "Z space" of the overlay of the next node
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* so that leads to inconsistent Z-sorting again. :(
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* HACK: For lack of a better approach we restrict this to cases where
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* an overlay is actually present.
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*/
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if (need_polygon_offset) {
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material.PolygonOffsetSlopeScale = 1;
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material.PolygonOffsetDepthBias = 1;
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}
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}
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