43 lines
1.2 KiB
GLSL
43 lines
1.2 KiB
GLSL
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varying vec3 nor;
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uniform sampler2D tex;
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uniform float far;
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uniform float objectid;
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varying vec3 eyenor;
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varying vec3 viewpos;
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const float near = 1.0;
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vec4 encdepth(float v) {
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vec4 enc = vec4(1.0, 255.0, 65025.0, 16581375.0) * v;
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enc = fract(enc);
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enc -= enc.yzww * vec4(1.0/255.0, 1.0/255.0, 1.0/255.0, 0.0);
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return enc;
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}
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void main() {
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float linear_z = (2.0 * near) / (far + near - gl_FragCoord.z * (far - near));
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// Tune for better inside range without losing outdoors
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linear_z *= 2.0;
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// Calculate the spherical UV
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const vec3 forward = vec3(0.0, 0.0, 1.0);
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// get the angle between the forward vector and the horizontal portion of the normal
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vec3 normal_x = normalize(vec3(eyenor.x, 0.0, eyenor.z));
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float sin_theta_x = length(cross( forward, normal_x )) * eyenor.x/abs(eyenor.x);
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// get the angle between the forward vector and the vertical portion of the normal
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vec3 normal_y = normalize(vec3(0.0, eyenor.y, eyenor.z));
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float sin_theta_y = length(cross( forward, normal_y )) * eyenor.y/abs(eyenor.y);
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vec4 detail0 = texture2D(tex, vec2(0.5 + sin_theta_x*0.5, 0.5 + sin_theta_y*0.5));
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gl_FragData[0] = detail0 * gl_Color;
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gl_FragData[1] = vec4(nor, linear_z);
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gl_FragData[2] = vec4(encdepth(gl_FragCoord.z).xyz, objectid);
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}
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