42 lines
1.1 KiB
Plaintext
42 lines
1.1 KiB
Plaintext
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// #include "res://addons/rokojori_action_library/Runtime/Shading/Library/Wind.gdshaderinc"
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#include "res://addons/rokojori_action_library/Runtime/Shading/Library/Math.gdshaderinc"
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#include "res://addons/rokojori_action_library/Runtime/Shading/Library/Transform.gdshaderinc"
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/*
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uniform sampler2D terrainHeightMap;
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uniform vec2 terrainCenterXZ = vec2( 0.0, 0.0 );
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uniform vec2 terrainSizeXZ = vec2( 100.0, 100.0 );
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uniform float terrainMinHeight = 0.0;
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uniform float terrainMaxHeight = 100.0;
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uniform sampler2D terrainNormalMap;
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*/
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void addTerrainOffset(
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mat4 _MODEL_MATRIX,
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inout vec3 _VERTEX,
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sampler2D terrainHeightMap,
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vec2 terrainCenterXZ,
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vec2 terrainSizeXZ,
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float terrainMinHeight,
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float terrainMaxHeight
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)
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{
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vec3 worldVertex = localToWorld( _VERTEX, _MODEL_MATRIX );
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vec2 mapOffset = terrainCenterXZ - terrainSizeXZ/2.0;
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vec2 uv = ( worldVertex.xz - mapOffset ) / terrainSizeXZ;
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float height = mix( terrainMinHeight, terrainMaxHeight, texture( terrainHeightMap, uv ).r );
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worldVertex.y += height;
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_VERTEX = worldToLocal( worldVertex, _MODEL_MATRIX );
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}
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