48 lines
1.2 KiB
Text
48 lines
1.2 KiB
Text
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#include "atmosphere.glsl"
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layout (location = 0) in vec2 in_uv;
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layout (location = 0) out vec4 out_color;
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layout(push_constant, binding = 1) uniform PushConstant{
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mat4 view;
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vec4 sun_position_fov;
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float aspect;
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};
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vec3 sky_ray(const vec2 uv) {
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const float d = 0.5 / tan(sun_position_fov.w / 2.0);
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return normalize(vec3((uv.x - 0.5) * aspect,
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uv.y - 0.5,
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d));
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}
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void main() {
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const vec3 color = atmosphere(
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// ray direction
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normalize(mat3(view) * sky_ray(in_uv)),
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// ray origin
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vec3(0, 6372e3, 0),
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// position of the sun in world space (this will be normalized)
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sun_position_fov.xyz,
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// intensity of the sun
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22.0,
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// radius of the plant in meters
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6371e3,
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// radius of the atmosphere in meters
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6471e3,
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// Rayleigh scattering coefficient
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vec3(5.5e-6, 13.0e-6, 22.4e-6),
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// Mie scattering coefficient
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21e-6,
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// Rayleigh scale height
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8e3,
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// Mie scale height
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1.2e3,
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// Mie preferred scattering direction
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0.758
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);
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out_color = vec4(color, 1.0);
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}
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