36 lines
922 B
GLSL
36 lines
922 B
GLSL
// See http://www.ozone3d.net/tutorials/glsl_texturing_p04.php for ref
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#ifndef GL_ARB_bindless_texture
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uniform sampler2D tex;
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#endif
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#ifdef GL_ARB_bindless_texture
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flat in sampler2D handle;
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#endif
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in vec3 nor;
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out vec4 FragColor;
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vec4 getPosFromUVDepth(vec3 uvDepth, mat4 InverseProjectionMatrix);
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vec3 getLightFactor(float specMapValue);
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void main() {
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vec3 texc = gl_FragCoord.xyz / vec3(screen, 1.);
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vec3 u = getPosFromUVDepth(texc, InverseProjectionMatrix).xyz;
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vec3 r = reflect(u, nor);
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float m = 2.0 * sqrt(r.x * r.x + r.y * r.y + (r.z + 1.0) * (r.z + 1.0));
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r.y = - r.y;
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#ifdef GL_ARB_bindless_texture
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vec4 detail0 = texture(handle, r.xy / m + .5);
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#ifdef SRGBBindlessFix
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detail0.xyz = pow(detail0.xyz, vec3(2.2));
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#endif
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#else
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vec4 detail0 = texture(tex, r.xy / m + .5);
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#endif
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vec3 LightFactor = getLightFactor(1.);
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FragColor = vec4(detail0.xyz * LightFactor, 1.);
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}
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