/* * by @aa_debdeb (https://twitter.com/aa_debdeb) */ precision highp float; uniform float time; uniform vec2 mouse; uniform vec2 resolution; float sdSphere(vec3 p, float r) { return length(p) - r; } float displacement(vec3 p) { return sin(2.0 * sin(time * 0.95) * p.x) * sin(2.0 * sin(time * 1.2) * p.y) * sin(2.0 * sin(time * 1.35) * p.z); } float map(vec3 p) { p += 1.0; return sdSphere(p, 3.0) + 0.5 * displacement(p); } vec3 calcNormal(vec3 p) { float d = 0.01; return normalize(vec3( map(p + vec3(d, 0.0, 0.0)) - map(p - vec3(d, 0.0, 0.0)), map(p + vec3(0.0, d, 0.0)) - map(p - vec3(0.0, d, 0.0)), map(p + vec3(0.0, 0.0, d)) - map(p - vec3(0.0, 0.0, d)) )); } float ambientOcculusion(vec3 o, vec3 n) { float step = 0.05; float sum = 0.0; float scale = 0.5; for (float i = 1.0; i <= 5.0; i += 1.0) { float d = step * i; vec3 p = o + d * n; sum += scale * (d - map(p)); scale *= 0.5; } return 1.0 - sum; } bool raymarch(vec3 ro, vec3 rd, out vec3 color) { vec3 p = ro; for (int i = 0; i < 64; i++) { float d = 0.5 * map(p); p += d * rd; if (d < 0.01) { vec3 n = calcNormal(p); float dotNL = dot(n, vec3(0.0, 1.0, 0.0)); float ao = ambientOcculusion(p, n); mat3 colMat = mat3( 0.6, 0.2, 0.3, 0.1, 0.8, 1.0, 1.0, 0.4, 0.1 ); color = 0.8 * colMat * (0.5 * n + 0.5) * (0.5 + 0.5 * pow(ao, 0.8)) * smoothstep(-1.5, 1.0, dotNL); return true; } } return false; } float softshadow(vec3 ro, vec3 rd, float k) { vec3 p = ro; float res = 1.0; float d = 0.0; for (int i = 0; i < 32; i++) { float t = map(p); if (t < 0.0) return 0.0; res = min(res, k * t / d); d += t; p += t * rd; } return res; } vec4 planeX(vec3 ro, vec3 rd, float h) { float t = (h - ro.x) / rd.x; return vec4(ro + t * rd, t); } vec4 planeY(vec3 ro, vec3 rd, float h) { float t = (h - ro.y) / rd.y; return vec4(ro + t * rd, t); } vec4 planeZ(vec3 ro, vec3 rd, float h) { float t = (h - ro.z) / rd.z; return vec4(ro + t * rd, t); } vec3 room(vec3 ro, vec3 rd) { vec3 size = vec3(20.0, 5.0, 20.0); vec3 baseColor = vec3(0.8); vec3 c = baseColor; float t = 1e6; vec4 bottom = planeY(ro, rd, -size.y); if (bottom.w > 0.0) { t = bottom.w; } vec4 top = planeY(ro, rd, size.y); if (top.w > 0.0 && top.w < t) { t = top.w; } vec4 far = planeZ(ro, rd, size.z); if (far.w > 0.0 && far.w < t) { t = far.w; } vec4 near = planeZ(ro, rd, -size.z); if (near.w > 0.0 && near.w < t) { t = near.w; } vec4 left = planeX(ro, rd, size.x); if (left.w > 0.0 && left.w < t) { t = left.w; } vec4 right = planeX(ro, rd, -size.x); if (right.w > 0.0 && right.w < t) { t = right.w; } vec3 p = ro + t * rd; if (abs(p.y - size.y) < 0.001) { // lights if (abs(abs(p.x) - 8.0) < 3.0 && abs(abs(p.z) - 8.0) < 1.0) { c = vec3(1.0); } } if (abs(p.y + size.y) < 0.001) { c *= 0.90 + 0.1 * softshadow(p, vec3(0.0, 1.0, 0.0), 3.0); } vec3 diff = abs(abs(p) - size); c *= 0.8 + 0.2 * min(pow(0.5 * (diff.x + diff.y), 0.5), 1.0); c *= 0.8 + 0.2 * min(pow(0.5 * (diff.y + diff.z), 0.5), 1.0); c *= 0.8 + 0.2 * min(pow(0.5 * (diff.z + diff.x), 0.5), 1.0); return c; } void main(void) { vec2 st = (2.0 * gl_FragCoord.xy - resolution) / min(resolution.x, resolution.y); float rad = time * 0.2; vec3 ro = vec3(15.0 * sin(rad), 0.5, 15.0 * cos(rad)); vec3 ta = vec3(0.0, -1.0, 0.0); vec3 z = normalize(ta - ro); vec3 up = vec3(0.0, 1.0, 0.0); vec3 x = normalize(cross(z, up)); vec3 y = normalize(cross(x, z)); vec3 rd = normalize(x * st.x + y * st.y + z * 1.5); vec3 c; if (raymarch(ro, rd, c)) { } else { c = room(ro, rd); } gl_FragColor = vec4(c, 1.0); }

Object in The Room