61 lines
1.2 KiB
GLSL
61 lines
1.2 KiB
GLSL
#version 330
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uniform sampler2D ntex;
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uniform sampler2D dtex;
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//uniform sampler2D cloudtex;
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uniform vec3 direction;
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uniform vec3 col;
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uniform mat4 invproj;
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//uniform int hasclouds;
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//uniform vec2 wind;
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in vec2 uv;
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out vec4 Diff;
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out vec4 Spec;
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vec3 DecodeNormal(vec2 n)
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{
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float z = dot(n, n) * 2. - 1.;
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vec2 xy = normalize(n) * sqrt(1. - z * z);
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return vec3(xy,z);
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}
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void main() {
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float z = texture(dtex, uv).x;
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vec4 xpos = 2.0 * vec4(uv, z, 1.0) - 1.0;
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xpos = invproj * xpos;
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xpos.xyz /= xpos.w;
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if (z < 0.03)
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{
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// Skyboxes are fully lit
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Diff = vec4(1.0);
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Spec = vec4(1.0);
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return;
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}
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vec3 norm = normalize(DecodeNormal(2. * texture(ntex, uv).xy - 1.));
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// Normalized on the cpu
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vec3 L = direction;
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float NdotL = max(0.0, dot(norm, L));
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vec3 R = reflect(L, norm);
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float RdotE = max(0.0, dot(R, normalize(xpos.xyz)));
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float Specular = pow(RdotE, 200);
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vec3 outcol = NdotL * col;
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/* if (hasclouds == 1)
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{
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vec2 cloudcoord = (xpos.xz * 0.00833333) + wind;
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float cloud = texture(cloudtex, cloudcoord).x;
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//float cloud = step(0.5, cloudcoord.x) * step(0.5, cloudcoord.y);
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outcol *= cloud;
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}*/
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Diff = vec4(NdotL * col, 1.);
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Spec = vec4(Specular * col, 1.);
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}
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