36 lines
1.2 KiB
Plaintext
36 lines
1.2 KiB
Plaintext
shader_type sky;
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uniform sampler2D base;
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uniform vec3 base_color : source_color;
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uniform float base_speed : hint_range(0,1) = 0.1;
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uniform sampler2D layer;
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uniform sampler2D layer_two;
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uniform float NOISE : hint_range(0,1) = 0.5;
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float random(vec2 coords) {
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return fract(sin(dot(coords.xy, vec2(12.9898,78.233))) * 43758.5453);
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}
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void sky() {
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float NOISE_GRANULARITY = NOISE / 100.0;
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vec2 base_coords = vec2(SKY_COORDS.x+TIME*base_speed*0.05, SKY_COORDS.y);
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vec4 base_pix = texture(base, base_coords);
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float noise = mix(-NOISE_GRANULARITY, NOISE_GRANULARITY, random(base_coords));
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float base_alpha = base_pix.a;
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//if (base_alpha < 0.01 && base_alpha > 0.0) {
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//base_alpha += noise;
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//}
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vec2 star_coords = vec2(SKY_COORDS.x-TIME*base_speed*0.05, SKY_COORDS.y);
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vec4 star_pix = texture(layer_two, star_coords)*0.5;
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vec2 galaxy_coords = vec2(SKY_COORDS.x-TIME*base_speed*0.01, SKY_COORDS.y);
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vec4 galaxy_pix = max(vec4(0,0,0,0),texture(layer, galaxy_coords));
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COLOR = vec3(0,0,0) + star_pix.rgb * star_pix.a + base_pix.rgb * base_alpha + + galaxy_pix.rgb * galaxy_pix.a;
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// Called for every visible pixel in the sky background, as well as all pixels
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// in the radiance cubemap.
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}
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