precision highp float; uniform vec2 resolution; uniform float time; uniform vec2 mouse; uniform sampler2D backbuffer; #define pi acos(-1.0) #define twoPi acos(-1.0) * 2.0 #define COLOR_N vec3(0.15, 0.34, 0.6) vec2 mainPoint; float voronoiStrength = 0.022; float spinnerAt = 0.0; mat2 rotate(float a){ float c = cos(a); float s = sin(a); return mat2(c, -s, s, c); } vec2 random2d2d(vec2 p){ return fract(sin(vec2(dot(p.xy,vec2(12.532,95.235)), dot(p.xy,vec2(42.532,65.235))))*24627.1245); } float random1d2d(vec2 p){ return fract(sin(dot(p.xy, vec2(12.532, 95.235))) * 24627.1245); } float random(vec3 v) { return fract(sin(dot(v, vec3(12.9898, 78.233, 19.8321))) * 43758.5453); } float valueNoise(vec3 v) { vec3 i = floor(v); vec3 f = smoothstep(0.0, 1.0, fract(v)); return mix( mix( mix(random(i), random(i + vec3(1.0, 0.0, 0.0)), f.x), mix(random(i + vec3(0.0, 1.0, 0.0)), random(i + vec3(1.0, 1.0, 0.0)), f.x), f.y ), mix( mix(random(i + vec3(0.0, 0.0, 1.0)), random(i + vec3(1.0, 0.0, 1.0)), f.x), mix(random(i + vec3(0.0, 1.0, 1.0)), random(i + vec3(1.0, 1.0, 1.0)), f.x), f.y ), f.z ); } float fbm(vec3 v) { float n = 0.0; float a = 0.5; for (int i = 0; i < 5; i++) { n += a * valueNoise(v); v *= 2.0; a *= 0.5; } return n; } float sdPlane(vec3 p, vec4 n) { return dot(p, n.xyz) + n.w; } float dPlaneBottom(vec3 p) { return sdPlane(p, vec4(0.0, 1.0, 0.0, 1.0)) * 0.8 + sin(p.z*4.0 + time*2.0)*0.05; } // https://iquilezles.org/www/articles/distfunctions/distfunctions.htm float sdCappedCylinder(vec3 p, float h, float r){ vec2 d = abs(vec2(length(p.xz),p.y)) - vec2(r,h); return min(max(d.x,d.y),0.0) + length(max(d,0.0)); } // https://iquilezles.org/www/articles/distfunctions/distfunctions.htm float sdCone(vec3 p, vec2 c, float h){ vec2 q = h * vec2(c.x/c.y, -1.0); vec2 w = vec2(length(p.xz), p.y); vec2 a = w - q * clamp(dot(w,q)/dot(q,q), 0.0, 1.0); vec2 b = w - q * vec2(clamp(w.x/q.x, 0.0, 1.0), 1.0); float k = sign(q.y); float d = min(dot(a, a), dot(b, b)); float s = max(k*(w.x*q.y - q.x*w.y), k*(w.y-q.y)); return sqrt(d) * sign(s); } float sdSpinner(vec3 p){ float c = 0.0; vec3 p1 = p; p1.xy *= rotate(pi); c += sdCone(p1 - vec3(0.0, 0.5722, 0.0), vec2(1.122, 0.82), 0.472); vec3 p2 = p; float cyl = sdCappedCylinder(p2, 0.12, 0.622); c = min(c, cyl); vec3 p3 = p; float axis = sdCappedCylinder(p3 - vec3(0.0, -0.1, 0.0), 0.62, 0.032); c = min(c, axis); return c; } float dSpinner(vec3 p){ // p *= 1.2; p.y += 0.36; p.xz *= rotate(time); p.xy *= rotate(0.2); return sdSpinner(p); } float smoothMin(float a, float b, float k){ float h = clamp(0.5 + 0.5 * (b-a)/k, 0.0, 1.0); return mix(b, a, h) - k * h * (1.0 - h); } float distanceFunction(vec3 p) { vec3 p1 = p; float d = 0.0; d += dSpinner(p1); spinnerAt += 0.4/(0.4+abs(d)); vec3 p2 = p; d = smoothMin(d, dPlaneBottom(p2), 0.01); return d; } vec3 getNormal(vec3 p){ vec2 err = vec2(0.01, 0.0); return normalize(vec3( distanceFunction(p + err.xyy) - distanceFunction(p - err.xyy), distanceFunction(p + err.yxy) - distanceFunction(p - err.yxy), distanceFunction(p + err.yyx) - distanceFunction(p - err.yyx) )); } float starOrb(vec2 uv, vec2 p, float flare){ float c = 0.0; uv -= p; float d = length(uv); c += 0.2/d; float ray = max(0.0, 1.0 - abs(uv.x*uv.y*200.0)); c += ray*flare; uv *= rotate(pi/4.0); ray = max(0.0, 1.0 - abs(uv.x*uv.y*500.0)); c += ray*0.2*flare; c *= smoothstep(0.4, 0.2, d); return c; } vec3 latticeStarField(vec2 uv, float s, vec2 subPos){ vec3 color = vec3(0.0); uv *= s; uv += subPos; vec2 fPos = fract(uv) - 0.5; vec2 iPos = floor(uv); for(float y = -1.0; y <= 1.0; y+=1.0){ for(float x = -1.0; x <= 1.0; x+=1.0){ vec2 offset = vec2(x, y); float n = random1d2d(iPos+offset); float s = fract(n*4052.22); float star = starOrb(fPos-offset, vec2(n, fract(n*34.24)), smoothstep(0.1, 0.02, s)); color += pow(star * s, 2.0); } } return color; } vec3 skyTexture(vec2 uv, float size, vec3 baseColor, float scrollSpeed, float timeSeed){ vec2 uv2 = uv * size; vec3 col = vec3(0.0); vec3 noiseCol = pow(vec3(fbm(vec3(uv2 + vec2(0.0, time*(scrollSpeed + 0.1) + timeSeed), 122.2))), vec3(2.0)); noiseCol += pow(vec3(fbm(vec3(uv2 + vec2(0.0, time*(scrollSpeed + 0.2) + timeSeed), 422.2))), vec3(3.2)); noiseCol += pow(vec3(fbm(vec3(uv2 + vec2(0.0, time*(scrollSpeed + 0.3) + timeSeed), 522.2))), vec3(4.0)); noiseCol += pow(vec3(fbm(vec3(uv2 + vec2(0.0, time*(scrollSpeed + 0.4) + timeSeed), 622.2))), vec3(7.0)); noiseCol += pow(vec3(fbm(vec3(uv2 + vec2(0.0, time*(scrollSpeed + 0.5) + timeSeed), 722.2))), vec3(9.0)); col += mix(baseColor, vec3(1.0), pow(noiseCol, vec3(3.0))); return col; } vec3 voronoi(vec2 uv, float s) { vec2 uv2 = uv * s; vec2 iPos= floor(uv2); vec2 fPos = fract(uv2); vec3 returnParam = vec3(0.0); float dist = 999.0; vec2 point = vec2(8.0); vec2 offset = vec2(8.0); vec2 diff = vec2(8.0); for(int y = -1; y <= 1; y++){ for(int x = -1 ; x <= 1; x++){ vec2 o = vec2(float(x), float(y)); vec2 p = random2d2d(iPos + o); p = 0.5 + 0.5 * sin(time*0.2 + twoPi * p); vec2 di = o + p - fPos; float d = dot(di, di); // edge > x // if(dist > d){ // returnDist = d; // dist = returnDist; // } // dist = min(dist, d); point = mix(point, p, (1.0 - step(dist, d))); offset = mix(offset, o, (1.0 - step(dist, d))); diff = mix(diff, di, (1.0 - step(dist, d))); dist = mix(dist, d, (1.0 - step(dist, d))); } } // https://thebookofshaders.com/edit.php#12/2d-voronoi.frag dist = 999.0; for(int y = -2; y <= 2; y++){ for(int x = -2 ; x <= 2; x++){ vec2 o = offset + vec2(float(x), float(y)); vec2 p = random2d2d(iPos + o); p = 0.5 + 0.5 * sin(time*0.2 + twoPi * p); vec2 di = o + p - fPos; dist = mix(dist, min(dist, dot(0.5*(diff+di), normalize(di-diff))), (1.0 - step(dot(diff-di, diff-di), 0.0001))); } } mainPoint = point; returnParam = vec3(dist, diff); return returnParam; } float easeInOutExpo(float t) { if (t == 0.0 || t == 1.0) { return t; } if ((t *= 2.0) < 1.0) { return 0.5 * pow(2.0, 10.0 * (t - 1.0)); } else { return 0.5 * (-pow(2.0, -10.0 * (t - 1.0)) + 2.0); } } float linearStep(float start, float end, float t) { return clamp((t - start) / (end - start), 0.0, 1.0); } vec3 background(vec3 rayDir){ float k = rayDir.y * 0.5 + 0.5; vec3 color = vec3(0.0); for(float i = 0.0; i <= 1.0; i+=1.0/5.0){ float depth = fract(time*0.2 + i); float scale = mix(3.0, 0.1, depth); float fade = depth*smoothstep(10.0, 0.001, depth); color.r += latticeStarField(rayDir.xy*rotate(i*234.25), scale, vec2(i*222.87)).r*(fade*(sin(i*200.0+time*4.0) * 0.1 + 0.1)); depth = fract(time*0.2 + i + 0.01); scale = mix(3.0, 0.1, depth); fade = depth*smoothstep(10.0, 0.001, depth); color.g += latticeStarField(rayDir.xy*rotate(i*234.25), scale, vec2(i*222.87)).g*(fade*(sin(i*200.0+time*4.0) * 0.1 + 0.1)); depth = fract(time*0.2 + i - 0.01); scale = mix(3.0, 0.1, depth); fade = depth*smoothstep(10.0, 0.001, depth); color.b += latticeStarField(rayDir.xy*rotate(i*234.25), scale, vec2(i*222.87)).b*(fade*(sin(i*200.0+time*4.0) * 0.1 + 0.1)); } return mix(vec3(1.0), color, k); } vec3 renderingFunc(vec2 uv){ vec3 color = vec3(0.0); vec3 camPos = vec3(0.0, 0.5, -2.5); vec3 objectPos = vec3(0.0, 0.0, 0.0); vec3 forward = normalize(objectPos - camPos); vec3 up = vec3(0.0, 1.0, 0.0); vec3 right = normalize(cross(forward, up)); up = normalize(cross(right, forward)); float fov = 0.0; float it = time * 0.5; float fTime = mod(it, 7.5); float t1 = linearStep(0.5, 1.0, fTime); float t2 = linearStep(3.0, 3.5, fTime); float t3 = linearStep(5.5, 6.0, fTime); fov = mix(1.0, 2.0, easeInOutExpo(t1)); fov = mix(fov, 0.5, easeInOutExpo(t2)); fov = mix(fov, 1.0, easeInOutExpo(t3)); vec3 rayDir = normalize(uv.x * right + uv.y * up + fov * forward); float d = 0.0; float df = 0.0; vec3 p = vec3(0.0); bool isHit = false; for(int i = 0; i < 300; i++){ p = camPos + rayDir * d; df = distanceFunction(p); if(df <= 0.001){ isHit = true; break; } if(df > 100.0){ break; } d += df; } if(isHit){ if(dPlaneBottom(p) <= 0.001){ vec2 mappingUv = p.xz; float voro = voronoiStrength/voronoi(mappingUv + vec2(time*0.01, 0.0), 2.0).x; float stepVoro = step(0.01, voro); vec3 skyColor = skyTexture(mappingUv + voro*0.5, 2.0, mix(COLOR_N, vec3(1.0), smoothstep(0.0, 102.0, d)), 1.0, 2.0); color += skyColor; color += voro*0.1; } if(dSpinner(p) <= 0.001){ vec3 skyColor = skyTexture(rayDir.xy, 9.0, mix(COLOR_N, vec3(1.0), smoothstep(0.0, 32.0, d)), 0.2, 2.0); color = skyColor; } }else{ vec3 skyColor = skyTexture(rayDir.yx, 20.0, COLOR_N, 0.1, 2.0); color += skyColor; } color += pow(background(rayDir), vec3(12.0))*smoothstep(0.0, 32.0, d); color += pow(spinnerAt * 0.05, 8.0); color = pow(color, vec3(0.4545)); return color; } void main(){ vec2 uv = (gl_FragCoord.xy * 2.0 - resolution) / min(resolution.x, resolution.y); vec3 color = vec3(0.0); color += renderingFunc(uv); gl_FragColor = vec4(color, 1.0); }

SkyColorSpinner