precision highp float; uniform vec2 mouse; uniform vec2 resolution; uniform float time; vec3 hsv2rgb(float h, float s, float v) { vec3 a = fract(h + vec3(0.0, 2.0, 1.0)/3.0) * 6.0 - 3.0; a = clamp(abs(a) - 1.0, 0.0, 1.0) - 1.0; a = a*s + 1.0; return a*v; } mat2 rot(float a) { float c = cos(a), s = sin(a); return mat2(c,s,-s,c); } vec3 onRep(vec3 p, float interval) { return mod(p, interval) - interval * 0.5; } vec3 rotate(vec3 p, float angle, vec3 axis) { vec3 a = normalize(axis); float s = sin(angle); float c = cos(angle); float r = 1.0 - c; mat3 m = mat3( a.x * a.x * r + c, a.y * a.x * r + a.z * s, a.z * a.x * r - a.y * s, a.x * a.y * r - a.z * s, a.y * a.y * r + c, a.z * a.y * r + a.x * s, a.x * a.z * r + a.y * s, a.y * a.z * r - a.x * s, a.z * a.z * r + c ); return m * p; } float box(vec3 p, float s) { p = abs(p) - s; return max(max(p.x, p.y), p.z); } float plane(vec3 p) { float d = p.y; return d; } float sdFloor(vec3 p) { return dot(p, vec3(0., 1., 0.)) + 0.28; } float boxZ(vec3 p, float speed, float size, float repx, float repz) { p.z -= (time - 1.) * speed; p.z = onRep(p, repz).z; p.x = onRep(p, repx).x; p.y += 0.2 - size; p = rotate(p, time * speed, vec3(-0.5,0.0,0.0)); return box(p, size); } float boxX(vec3 p, float speed, float size, float repx, float repz) { p.x -= time * speed; p.x = onRep(p, repx).x; p.z = onRep(p, repz).z; p.y += 0.2 - size; p = rotate(p, time * speed, vec3(0.0,0.0,0.5)); return box(p, size); } float myBoxZ1(vec3 p) { return boxZ(vec3(p.x + .5, p.y, p.z), 5., 0.1, 5., 2.); } float myBoxZ2(vec3 p) { return boxZ(vec3(p.x+1.5, p.y, p.z), 4., 0.2, 5., 2.); } float myBoxZ3(vec3 p) { return boxZ(vec3(p.x+2.5, p.y, p.z), 3., 0.25, 5., 2.); } float myBoxZ4(vec3 p) { return boxZ(vec3(p.x+3.5, p.y, p.z), 2., 0.3, 5., 2.); } float myBoxZ5(vec3 p) { return boxZ(vec3(p.x+4.5, p.y, p.z), 1.8, 0.4, 5., 2.); } float myBox4(vec3 p) { return boxX(vec3(p.x, p.y, p.z), 5., 0.1, 2., 8.); } float myBox5(vec3 p) { return boxX(vec3(p.x, p.y, p.z-2.), 4., 0.2, 2., 8.); } float myBox6(vec3 p) { return boxX(vec3(p.x, p.y, p.z-4.), 3., 0.25, 2., 8.); } float myBox7(vec3 p) { return boxX(vec3(p.x, p.y, p.z-6.), 2., 0.3, 2., 8.); } float sceneDist(vec3 p) { float ret = sdFloor(p); // z ret = min(ret, myBoxZ1(p)); ret = min(ret, myBoxZ2(p)); ret = min(ret, myBoxZ3(p)); ret = min(ret, myBoxZ4(p)); ret = min(ret, myBoxZ5(p)); // x // ret = min(ret, myBox4(p)); // ret = min(ret, myBox5(p)); // ret = min(ret, myBox6(p)); // ret = min(ret, myBox7(p)); return ret; } const float EPS = 0.0001; vec3 getNormal(vec3 p) { return normalize(vec3( sceneDist(p + vec3(EPS,0.,0.)) - sceneDist(p + vec3(-EPS,0.,0.)), sceneDist(p + vec3(0.,EPS,0.)) - sceneDist(p + vec3(0.,-EPS,0.)), sceneDist(p + vec3(0.,0.,EPS)) - sceneDist(p + vec3(0.,0.,-EPS)) )); } const vec3 lightDir = vec3(-0.577, 0.577, 0.577); mat3 camera(vec3 ro, vec3 ta) { vec3 cw = normalize(ta - ro); vec3 cp = vec3(0.0, 1.0, 0.0); vec3 cu = cross(cw, cp); vec3 cv = cross(cu, cw); return mat3(cu, cv, cw); } float genShadow(vec3 ro, vec3 rd) { float h = 0.0; float c = 0.001; float r = 1.0; float shadowCoef = 0.5; for (int i = 0; i<20; i++) { h = sceneDist(ro + rd * c); if(h < 0.001) { return shadowCoef; } r = min(r, h * 16.0 / c); c += h; } return 1.0 - shadowCoef + r * shadowCoef; } void main() { vec2 uv = (gl_FragCoord.xy * 2.0 - resolution.xy) / min(resolution.x, resolution.y); float screenZ = 1.5; vec3 rd = normalize(vec3(uv, screenZ)); // Camera vec3 ta = vec3(-1.5, -0.5, -1.); vec3 ro = vec3(1., 2.5, 2.); if (mod(time, 50.) < 10.) { ro *= mod(time, 50.); } else if (mod(time, 50.) < 20.) { ro = vec3(-1., 0.5, 1.5); ro.x *= mod(time, 50.) - 9.; ro.y *= mod(time, 50.) - 10.; } else if (mod(time, 50.) < 30.) { ro = vec3(0.1, 5., 0.5); ro.x += 2.; ro.zy *= mod(time, 50.) - 18.; ro.xy /= 2.; } else if (mod(time, 50.) < 40.) { ro = vec3(2., 0.8, 2.5); ro.x *= mod(time, 50.) - 30.; } else { ro = vec3(-5., 0.5, 2.5); ro.z *= mod(time, 50.) - 40.; } rd = camera(ro, ta) * normalize(vec3(uv, screenZ)); float d = 0.0; vec3 col = vec3(0.); vec3 light = normalize(lightDir + vec3(0., 2., 1.)); float shadow = 1.0; for(int i=0; i<99; i++) { vec3 rp = ro + rd * d; float dist = sceneDist(rp); if (abs(dist) < 0.0001) { vec3 normal = getNormal(rp); // light vec3 halfLE = normalize(light - rd); float diff = clamp(dot(light, normal), 0.1, 1.0); float spec = pow(clamp(dot(halfLE, normal), 0.0, 1.0), 50.0); shadow = genShadow(rp + normal * 0.001, light); float u = 1.0 - floor(mod(rp.x, 2.0)); float v = 1.0 - floor(mod(rp.z, 2.0)); if((u == 1.0 && v < 1.0) || (u < 1.0 && v == 1.0)) { diff *= 0.7; } col = vec3(0.89); col = col * diff + vec3(spec); if(myBoxZ1(rp) < 0.001) { col.rgb -= 0.5; } else if(myBoxZ2(rp) < 0.001) { col.r += 0.5; } else if(myBoxZ3(rp) < 0.001) { col.g += 0.5; } else if(myBoxZ4(rp) < 0.001) { col.b += 0.5; } else if(myBoxZ5(rp) < 0.001) { col.rgb += 0.5; } break; } d += dist; } gl_FragColor = vec4(col * max(0.5, shadow), 1.); }

Rolling Cubes