47 lines
819 B
Factor
47 lines
819 B
Factor
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USING: multiline ;
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IN: terrain.shaders
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STRING: terrain-vertex-shader
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uniform sampler2D heightmap;
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varying vec2 heightcoords;
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const vec4 COMPONENT_SCALE = vec4(0.5, 0.01, 0.002, 0.0);
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float height(sampler2D map, vec2 coords)
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{
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vec4 v = texture2D(map, coords);
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return dot(v, COMPONENT_SCALE);
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}
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void main()
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{
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gl_Position = gl_ModelViewProjectionMatrix
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* (gl_Vertex + vec4(0, height(heightmap, gl_Vertex.xz), 0, 0));
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heightcoords = gl_Vertex.xz;
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}
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;
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STRING: terrain-pixel-shader
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uniform sampler2D heightmap;
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varying vec2 heightcoords;
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const vec4 COMPONENT_SCALE = vec4(0.5, 0.01, 0.002, 0.0);
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float height(sampler2D map, vec2 coords)
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{
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vec4 v = texture2D(map, coords);
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return dot(v, COMPONENT_SCALE);
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}
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void main()
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{
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gl_FragColor = texture2D(heightmap, heightcoords);
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}
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;
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