75 lines
2.2 KiB
GLSL
75 lines
2.2 KiB
GLSL
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#version 330 core
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in VS_OUT {
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vec2 texcoord;
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vec2 orthophoto_texcoord;
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vec3 vertex_normal;
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} fs_in;
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uniform sampler2D landclass;
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uniform sampler2DArray atlas;
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uniform sampler2D perlin;
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// Passed from VPBTechnique, not the Effect
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uniform float fg_tileWidth;
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uniform float fg_tileHeight;
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uniform bool fg_photoScenery;
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uniform vec4 fg_dimensionsArray[128];
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uniform vec4 fg_ambientArray[128];
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uniform vec4 fg_diffuseArray[128];
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uniform vec4 fg_specularArray[128];
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uniform vec4 fg_textureLookup1[128];
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uniform vec4 fg_textureLookup2[128];
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uniform mat4 fg_zUpTransform;
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uniform vec3 fg_modelOffset;
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const float TERRAIN_METALLIC = 0.0;
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const float TERRAIN_ROUGHNESS = 0.95;
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// gbuffer_pack.glsl
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void gbuffer_pack(vec3 normal, vec3 base_color, float metallic, float roughness,
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float occlusion, vec3 emissive, uint mat_id);
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// color.glsl
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vec3 eotf_inverse_sRGB(vec3 srgb);
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void main()
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{
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vec3 texel;
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vec4 specular = vec4(0.1, 0.1, 0.1, 1.0);
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if (fg_photoScenery) {
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texel = texture(landclass, vec2(fs_in.texcoord.s, 1.0 - fs_in.texcoord.t)).rgb;
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} else {
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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(texture2D(landclass, fs_in.texcoord).g * 255.0 + 0.5);
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uint tex1 = uint(fg_textureLookup1[lc].r * 255.0 + 0.5);
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//color = ambientArray[lc] + diffuseArray[lc] * NdotL * gl_LightSource[0].diffuse;
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specular = fg_specularArray[lc];
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// Different textures have different have different dimensions.
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vec2 atlas_dimensions = fg_dimensionsArray[lc].st;
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vec2 atlas_scale = vec2(fg_tileWidth / atlas_dimensions.s, fg_tileHeight / atlas_dimensions.t );
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vec2 st = atlas_scale * fs_in.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 * fs_in.texcoord / 8.0).r) == 1.0) {
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st = vec2(atlas_scale.s * fs_in.texcoord.t, atlas_scale.t * fs_in.texcoord);
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}
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if (step(0.5, texture(perlin, - atlas_scale * fs_in.texcoord / 16.0).r) == 1.0) {
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st = -st;
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}
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texel = texture(atlas, vec3(st, tex1)).rgb;
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}
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vec3 color = eotf_inverse_sRGB(texel);
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vec3 N = normalize(fs_in.vertex_normal);
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gbuffer_pack(N, color, TERRAIN_METALLIC, TERRAIN_ROUGHNESS, 1.0, vec3(0.0), 3u);
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}
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