/* * by @aa_debdeb (https://twitter.com/aa_debdeb) */ precision highp float; #define PI 3.14159265359 uniform float time; uniform vec2 mouse; uniform vec2 resolution; struct Intersection { float d; vec3 diffuse; vec3 specular; float shiness; }; Intersection intersection(float d, vec3 diffuse, vec3 specular, float shiness) { Intersection isec; isec.d = d; isec.diffuse = diffuse; isec.specular = specular; isec.shiness = shiness; return isec; } Intersection intersection(float d, vec3 diffuse) { Intersection isec; isec.d = d; isec.diffuse = diffuse; isec.specular = vec3(0.0); isec.shiness = 1.0; return isec; } float random(vec3 x){ return fract(sin(dot(x,vec3(12.9898, 78.233, 39.425))) * 43758.5453); } float valuenoise(vec3 x) { vec3 i = floor(x); vec3 f = fract(x); vec3 u = f * f * (3.0 - 2.0 * f); return mix( mix( mix(random(i + vec3(0.0, 0.0, 0.0)), random(i + vec3(1.0, 0.0, 0.0)), u.x), mix(random(i + vec3(0.0, 1.0, 0.0)), random(i + vec3(1.0, 1.0, 0.0)), u.x), u.y ), mix( mix(random(i + vec3(0.0, 0.0, 1.0)), random(i + vec3(1.0, 0.0, 1.0)), u.x), mix(random(i + vec3(0.0, 1.0, 1.0)), random(i + vec3(1.0, 1.0, 1.0)), u.x), u.y ), u.z); } float fbm(vec3 x) { float sum = 0.0; float amp = 0.5; float scale = 1.0; for (int i = 0; i < 5; i++) { sum += amp * valuenoise(x); amp *= 0.5; x *= 2.1; } return sum; } mat2 rotate(float r) { float c = cos(r); float s = sin(r); return mat2(c, s, -s, c); } vec3 opBendX(vec3 p, float k) { float c = cos(k * p.x); float s = sin(k * p.x); mat2 m = mat2(c, -s, s, c); p.xy = m * p.xy; return p; } vec3 opBendZ(vec3 p, float k) { float c = cos(k * p.z); float s = sin(k * p.z); mat2 m = mat2(c, -s, s, c); p.zy = m * p.zy; return p; } float sdSphere(vec3 p, float r) { return length(p) - r; } float sdBox(vec3 p, vec3 b) { p = abs(p) - b; return length(max(p, 0.0)) + min(max(p.x, max(p.y, p.z)), 0.0); } float sdRoundBox(vec3 p, vec3 b, float r) { p = abs(p) - b; return length(max(p, 0.0)) + min(max(p.x, max(p.y, p.z)), 0.0) - r; } float sdRect(vec2 p, vec2 b) { p = abs(p) - b; return length(max(p, 0.0)) + min(max(p.x, p.y), 0.0); } float sdRoundRect(vec2 p, vec2 b, float r) { p = abs(p) - b; return length(max(p, 0.0)) + min(max(p.x, p.y), 0.0) - r; } Intersection shari(vec3 p) { p.y -= 0.5; float r = 0.3; float d = sdRoundBox(p, vec3(0.8 - r, 0.5 - r, 0.5 - r), r); float disp = 0.1 * (0.5 * valuenoise(p * vec3(2.0, 4.0, 3.0) + vec3(8.23, 6.19, 6.12)) + 0.5 * valuenoise(p * vec3(8.0, 12.0, 8.0) + vec3(16.43, 19.23, 26.32))); return intersection(d + disp, vec3(0.95, 0.95, 0.95)); } Intersection netaMaguro(vec3 p) { p = opBendX(p, -0.2); p = opBendZ(p, -0.3); p .y -= 1.0; float r = 0.1; float d= sdRoundBox(p, vec3(1.2 -r, 0.1 - r, 0.5 -r), r); return intersection(d, vec3(1.0, 0.3, 0.5), 0.2 * vec3(1.0, 0.7, 0.7), 2.0); } Intersection sushiMaguro(vec3 p) { Intersection sd = shari(p); Intersection nd = netaMaguro(p); if (sd.d < nd.d) { return sd; } else { return nd; } } Intersection netaIka(vec3 p) { p = opBendX(p, -0.3); p = opBendZ(p, -0.35); p .y -= 1.0; float r = 0.05; float d= sdRoundBox(p, vec3(1.2 -r, 0.05 - r, 0.45 - r), r); float cut = sdBox(vec3(p.x, p.y - 0.05, mod(p.z, 0.08) - 0.04), vec3(1.1, 0.05, 0.015)); return intersection(max(d, -cut), vec3(1.5), vec3(1.0), 1.0); } Intersection sushiIka(vec3 p) { Intersection sd = shari(p); Intersection nd = netaIka(p); if (sd.d < nd.d) { return sd; } else { return nd; } } vec3 tamagoColor(vec3 p) { float n = valuenoise(p * vec3(1.0, 2.0, 1.5) + vec3(34.19, 18.43, 21.53)) * 10.0; float v = sin(length(p.xz * vec2(10.0, 30.0) + n)) * 0.5 + 0.5; return mix(vec3(1.0, 1.0, 0.1), vec3(0.8, 0.7, 0.2), pow(v, 50.0)); } Intersection netaTamago(vec3 p) { vec3 c = tamagoColor(p); p = opBendX(p, -0.15); p = opBendZ(p, -0.25); p .y -= 1.0; float r = 0.02; float d= sdRoundBox(p, vec3(1.2 -r, 0.15 - r, 0.45 -r), r); return intersection(d, c); } Intersection sushiTamago(vec3 p) { Intersection sd = shari(p); Intersection nd = netaTamago(p); Intersection nearest = sd; if (nd.d < nearest.d) { nearest = nd; } if (abs(p.x) < 0.3) { nearest.diffuse = vec3(0.0); } return nearest; } float sdGunkan(vec3 p, vec3 s, float r) { float d = sdRoundRect(p.xz, vec2(s.x - r, s.z -r), r); vec2 w = vec2(d, abs(p.y) - s.y); return length(max(w, 0.0)) + min(max(w.x, w.y), 0.0); } Intersection gunkan(vec3 p) { p.y -= 0.5; float r = 0.5; float d1 = sdGunkan(p, vec3(0.8, 0.5, 0.5), r); float d2 = sdGunkan(p, vec3(0.6, 0.5, 0.4), r); return intersection(max(d1, -d2), vec3(0.0)); } Intersection netaIkura(vec3 p) { p.y -= 1.0; float d = 1e5; vec2 size = vec2(0.8, 0.4); vec2 half_size = size * 0.5; vec2 gap = size * 0.25; for (float x = 0.0; x <= 4.0; x++) { for (float y = 0.0; y <= 4.0; y++) { vec3 q = p; q.xz += gap * vec2(x, y) - half_size; q.y += random((x + y) * vec3(12.43, 19.39, 21.31)) * 0.2; d = min(d, sdSphere(q, 0.25)); } } return intersection(d, vec3(1.3, 0.4, 0.0), vec3(1.0, 0.5, 0.0), 16.0); } Intersection sushiIkura(vec3 p) { Intersection sd = gunkan(p); Intersection nd = netaIkura(p); if (sd.d < nd.d) { return sd; } else { return nd; } } vec3 woodTexture(vec3 p) { float n = fbm(p * vec3(0.5, 2.0, 5.0) + vec3(132.23, 183.43, 152.91)); float v = sin(n) * 0.5 + 0.5; return mix(vec3(0.9, 0.8, 0.3), vec3(0.8, 0.4, 0.2), pow(v, 7.0)); } Intersection woodPlate(vec3 p) { vec3 size = vec3(5.0, 0.5, 3.0); vec3 q = vec3(abs(p.x), p.y + size.y, abs(p.z)); float dh = sdBox(q, size); float dl = sdBox(q - vec3(size.x * 0.5, -2.0 * size.y, 0.0), vec3(size.x * 0.1, size.y, size.z)); vec3 c = woodTexture(p); return intersection(min(dh, dl), c); } Intersection map(vec3 p) { p.xz *= rotate(-time * 0.5); Intersection nearest = intersection(1e5, vec3(0.0)); vec3 mp = p; mp.x -= 3.0; mp.xz *= rotate(-PI / 3.0); Intersection maguro = sushiMaguro(mp); if (maguro.d < nearest.d) { nearest = maguro; } vec3 ip = p; ip.x -= 1.0; ip.xz *= rotate(-PI / 3.0); Intersection ika = sushiIka(ip); if (ika.d < nearest.d) { nearest = ika; } vec3 tp = p; tp.x += 1.0; tp.xz *= rotate(-PI / 3.0); Intersection tamago = sushiTamago(tp); if (tamago.d < nearest.d) { nearest = tamago; } vec3 ikp = p; ikp.x += 3.0; ikp.xz *= rotate(-PI / 3.0); Intersection ikura = sushiIkura(ikp); if (ikura.d < nearest.d) { nearest = ikura; } Intersection plate = woodPlate(p); if (plate.d < nearest.d) { nearest = plate; } return nearest; } vec3 calcNormal(vec3 p) { float d = 0.01; return normalize(vec3( map(p + vec3(d, 0.0, 0.0)).d - map(p - vec3(d, 0.0, 0.0)).d, map(p + vec3(0.0, d, 0.0)).d - map(p - vec3(0.0, d, 0.0)).d, map(p + vec3(0.0, 0.0, d)).d - map(p - vec3(0.0, 0.0, d)).d )); } vec3 LightDir = normalize(vec3(-1.0, 1.0, -1.0)); vec3 color(vec3 rd, vec3 normal, Intersection isec) { vec3 diff = isec.diffuse * max(0.5, dot(normal, LightDir)); vec3 ref = reflect(rd, normal); vec3 spec = isec.specular * pow(max(0.0, dot(ref, LightDir)), isec.shiness); return diff + spec; } vec3 background(vec2 st) { float r = atan(st.y, st.x); float v = sin(r * 10.0); return mix(vec3(1.0, 0.3, 0.0), vec3(1.0, 1.0, 0.0), step(0.0, v)); } vec3 raymarch(vec3 ro, vec3 rd, vec2 st) { vec3 p = ro; for (int i = 0; i < 64; i++) { Intersection isec = map(p); float d = 0.8 * isec.d; p += d * rd; if (d < 0.01) { vec3 n = calcNormal(p); return color(rd, n, isec); } } return background(st); } void main(void) { vec2 st = (2.0 * gl_FragCoord.xy - resolution) / min(resolution.x, resolution.y); vec3 ro = vec3(0.0, 5.0, -7.0); vec3 ta = vec3(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 = raymarch(ro, rd, st); gl_FragColor = vec4(c, 1.0); }

Sushi Shader