56 lines
1.8 KiB
GLSL
56 lines
1.8 KiB
GLSL
#version 330 core
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layout(location = 0) out vec4 gbuffer0;
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layout(location = 1) out vec2 gbuffer1;
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layout(location = 2) out vec4 gbuffer2;
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in vec3 normalVS;
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in vec2 texCoord;
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uniform sampler2D landclass;
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uniform sampler2DArray atlas;
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uniform sampler1D dimensionsArray;
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uniform sampler1D diffuseArray;
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uniform sampler1D specularArray;
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uniform sampler2D perlin;
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// Passed from VPBTechnique, not the Effect
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uniform float tile_width;
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uniform float tile_height;
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vec2 encodeNormal(vec3 n);
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vec3 decodeSRGB(vec3 screenRGB);
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void main()
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{
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// The Landclass for this particular fragment. This can be used to
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// index into the atlas textures.
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int lc = int(texture(landclass, texCoord).g * 255.0 + 0.5);
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// Different textures have different have different dimensions.
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// Dimensions array is scaled to fit in [0...1.0] in the texture1D, so has to be scaled back up here.
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vec4 color = texture(diffuseArray, float(lc)/512.0);
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vec4 specular = texture(specularArray, float(lc)/512.0);
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vec2 atlas_dimensions = 10000.0 * texture(dimensionsArray, float(lc)/512.0).st;
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vec2 atlas_scale = vec2(tile_width / atlas_dimensions.s, tile_height / atlas_dimensions.t );
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vec2 st = atlas_scale * texCoord;
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// Rotate texture using the perlin texture as a mask to reduce tiling
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if (step(0.5, texture(perlin, atlas_scale * texCoord / 8.0).r) == 1.0) {
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st = vec2(atlas_scale.s * texCoord.t, atlas_scale.t * texCoord.s);
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}
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if (step(0.5, texture(perlin, - atlas_scale * texCoord / 16.0).r) == 1.0) {
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st = -st;
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}
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vec3 texel = texture(atlas, vec3(st, lc)).rgb;
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gbuffer0.rgb = decodeSRGB(texel) * color.rgb;
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gbuffer0.a = 1.0;
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gbuffer1 = encodeNormal(normalVS);
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float specularity = clamp(dot(specular.rgb, vec3(0.333)), 0.0, 1.0);
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gbuffer2 = vec4(0.0, 1.0-specularity, 0.0, 0.0);
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}
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