mirror of https://github.com/bjornbytes/lovr.git
25 lines
635 B
GLSL
25 lines
635 B
GLSL
#version 460
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#extension GL_EXT_multiview : require
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#extension GL_GOOGLE_include_directive : require
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#include "lovr.glsl"
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vec4 lovrmain() {
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vec3 dir = normalize(Normal);
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float theta1 = -atan(dir.x, dir.z) / (2. * PI);
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float theta2 = fract(theta1);
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float dx1 = dFdx(theta1);
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float dy1 = dFdy(theta1);
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float dx2 = dFdx(theta2);
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float dy2 = dFdy(theta2);
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float phi = acos(dir.y) / PI;
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vec2 dx = vec2(abs(dx1) - 1e-5 < abs(dx2) ? dx1 : dx2, dFdx(phi));
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vec2 dy = vec2(abs(dy1) - 1e-5 < abs(dy2) ? dy1 : dy2, dFdy(phi));
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return Color * textureGrad(sampler2D(ColorTexture, Sampler), vec2(theta1, phi), dx, dy);
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}
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