38 lines
959 B
Plaintext
38 lines
959 B
Plaintext
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#version 450
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#extension GL_GOOGLE_include_directive : enable
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#include "lib/common.glsl"
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#include "lib/lighting.glsl"
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#include "lib/forward_fragment.glsl"
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CAMERA(0, camera)
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STORAGE_BUFFER(1, Object, objects)
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LIGHT_BUFFER(2, lights)
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SAMPLER_ARRAY(3, textures)
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float arc(vec3 a, vec3 b, float threshold) {
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return max(0, dot(a, b) - threshold) / (1 - threshold);
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}
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void main()
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{
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vec3 sky_angle = normalize(in_world_position - camera.Eye.xyz);
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vec3 sun_angle = normalize(vec3(0, 1, -1));
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vec3 sun_color = vec3(1, 0.8, 0.4);
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float sun_intensity = 16;
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float sun_halo = sun_intensity * 0.007;
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vec3 top = vec3(0.53, 0.69, 0.85);
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vec3 horizon = vec3(0.06, 0.18, 0.49);
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float frac = max(0, dot(sky_angle, vec3(0,1,0)));
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vec3 sky_color = mix(top, horizon, frac) +
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asin(arc(sun_angle, sky_angle, 0.9985)) * sun_intensity * sun_color +
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asin(arc(sun_angle, sky_angle, 0.99)) * sun_halo * sun_color;
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out_diffuse = vec4(sky_color, in_color.a);
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}
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