0d14e5a379
Needs a lot of cleanup. Data has been de-duplicated, and where identical copies existed, one of them has been replaced with a symlink. Some files have been excluded, such as binaries, installers and debug dumps. Some of that may still be present.
79 lines
2.4 KiB
GLSL
79 lines
2.4 KiB
GLSL
//SETTINGS//
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uniform float timeScale = 0.25;
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uniform float cloudScale = 0.5;
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uniform float skyCover = 0.6;
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uniform float softness = 0.2;
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uniform float brightness = 0.1;
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uniform int noiseOctaves = 8;
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uniform float curlStrain = 3.0;
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uniform float cover = 0.35;
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//SETTINGS//
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float saturate(float num) {
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return clamp(num, 0.0, 1.0);
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}
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float noise(vec2 uv) {
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return (snoise(uv) + 1.0) / 2.0;
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}
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vec2 rotate(vec2 uv) {
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uv = uv + noise(uv * 0.2) * 0.005;
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float rot = curlStrain;
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float sinRot = sin(rot);
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float cosRot = cos(rot);
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mat2 rotMat = mat2(cosRot, -sinRot, sinRot, cosRot);
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return uv * rotMat;
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}
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float fbm(vec2 uv) {
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float rot = 1.57;
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float sinRot = sin(rot);
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float cosRot = cos(rot);
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float f = 0.0;
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float total = 0.0;
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float mul = 0.5;
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mat2 rotMat = mat2(cosRot, -sinRot, sinRot, cosRot);
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for (int i = 0; i < noiseOctaves; i++) {
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f += noise(uv + iGlobalTime * 0.15 * timeScale * (1.0 - mul)) * mul;
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total += mul;
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uv *= 3.0;
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uv = rotate(uv);
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mul *= 0.5;
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}
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return f / total;
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}
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// https://sites.google.com/site/justinscsstuff/object-intersection
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const vec3 SKY_NORMAL = vec3(0, 1, 0);
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const vec3 SKY_COLOR = vec3(0.05, 0.05, 0.07);
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const vec3 SKY_POSITION = vec3(0, 0.5, 0);
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vec3 getSkyboxColor() {
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vec3 normal = normalize(_normal);
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float nDotD = dot(SKY_NORMAL, normal);
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vec3 intersection = normal * (-dot(SKY_NORMAL, -SKY_POSITION) / nDotD);
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float fw = length(fwidth(intersection.xz));
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if (nDotD < 0) {
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return vec3(SKY_COLOR) * max(pow(fw, 0.8) * 2.0, 0.5);
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}
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vec2 uv = intersection.xz;
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float bright = brightness*(1.8-cover);
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float color1 = fbm(uv-0.5+iGlobalTime*0.04*timeScale);
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float color2 = fbm(uv-10.5+iGlobalTime*0.02*timeScale);
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float clouds1 = smoothstep(1.0-cover,min((1.0-cover)+softness*2.0,1.0),color1);
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float clouds2 = smoothstep(1.0-cover,min((1.0-cover)+softness,1.0),color2);
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float cloudsFormComb = saturate(clouds1+clouds2) + pow(fw, 0.8) * 2.0;
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float cloudCol = saturate(saturate(1.0-pow(color1,1.2)*0.2)*bright);
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vec3 clouds1Color = vec3(cloudCol,cloudCol,cloudCol);
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vec3 clouds2Color = mix(clouds1Color,SKY_COLOR,0.25);
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vec3 cloudColComb = mix(clouds1Color,clouds2Color,saturate(clouds2-clouds1));
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return mix(SKY_COLOR, cloudColComb, min(cloudsFormComb, 1.0));
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}
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