43 lines
1.4 KiB
Text
43 lines
1.4 KiB
Text
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#extension GL_GOOGLE_include_directive : enable
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#include "atmosphere.glsl"
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layout (location = 0) in vec2 inUV;
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layout (location = 0) out vec4 outColor;
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layout(push_constant, binding = 1) uniform PushConstant{
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mat4 view;
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vec4 aspectFovY, sunPosition;
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};
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vec3 skyRay (vec2 Texcoord) {
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float d = 0.5 / tan(aspectFovY.y/2.0);
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return normalize(vec3((Texcoord.x - 0.5) * aspectFovY.x,
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Texcoord.y - 0.5,
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-d));
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}
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void main() {
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vec3 vPosition = mat3(view) * skyRay(inUV);
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vec3 color = atmosphere(
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normalize(vPosition), // normalized ray direction
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vec3(0,6372e3,0), // ray origin
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sunPosition.xyz, // position of the sun
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22.0, // intensity of the sun
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6371e3, // radius of the planet in meters
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6471e3, // radius of the atmosphere in meters
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vec3(5.5e-6, 13.0e-6, 22.4e-6), // Rayleigh scattering coefficient
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21e-6, // Mie scattering coefficient
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8e3, // Rayleigh scale height
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1.2e3, // Mie scale height
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0.758 // Mie preferred scattering direction
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);
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// Apply exposure.
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color = 1.0 - exp(-1.0 * color);
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outColor = vec4(color, 1);
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}
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