precision highp float; uniform vec2 resolution; uniform float time; mat2 genRot(float t){ return mat2(cos(t),sin(t),sin(-t),cos(t)); } vec2 cmin(vec2 a,vec2 b){ return vec2(min(a.x,b.x), (a.x < b.x ? a.y : b.y)); } vec2 cmax(vec2 a,vec2 b){ return vec2(max(a.x,b.x), (a.x < b.x ? b.y : a.y)); } float sdBox( vec3 p, vec3 b ) { vec3 q = abs(p) - b; return length(max(q,0.0)) + min(max(q.x,max(q.y,q.z)),0.0); } vec3 path(float t){ vec3 res = vec3(sin(t)*0.25 + sin(t/4.0)*0.5,0.0,0.0); return res; } vec2 d_particle(vec3 p){ float space = 3.0; float speed = 3.0; float offset = speed*time; p.x += sin(p.z+offset)*0.5; p.x += sin(p.z)*0.5; p.y += sin(p.z)*0.5; p.z += offset; vec3 q = (fract(p/space+0.5)-0.5)*space; vec2 t = vec2(length(q)-0.005,0.0); return t; } vec2 d_stream(vec3 p){ vec3 q = p; p /= 2.0; q.x = fract(p.x + 0.5) - 0.5; q.y = fract(p.y + 0.5) - 0.5; p *= 2.0; float t = length(q.xy) - 0.0625; t = max(t,-(abs(p.y - 2.0) - 1.0)); t = max(t,-(abs(p.x) - 4.0)); return vec2(t,2.0); } vec2 d_line(vec3 p){ p.z *= -1.0; float t = length(p.xy-path(p.z+floor((p.z-time*30.0)/20.0)*0.1).xy) - 0.125*max(fract((p.z-time*30.0)/20.0)*fract((p.z-time*30.0)/20.0)-0.5,0.0); return vec2(t,3.0); } vec2 d_floor(vec3 p){ p.xz /= 2.0; float f = p.y + 0.0; f -= abs(fract(p.z+0.5)-0.5) > 0.4875 ? -0.1 : 0.0; f -= abs(fract(p.x+0.5)-0.5) > 0.4875 ? -0.1 : 0.0; vec3 q = p; q.x = fract(p.x + 0.5)-0.5; q.z = fract(p.z + 0.5)-0.5; vec2 grid = floor(p.xz+0.5); q.xz *= genRot(0.1*sin(grid.x)); q.xy *= genRot(0.1*sin(grid.y)); q.zy *= genRot(0.1*sin(grid.x+grid.y)); vec2 tower = vec2(abs(grid.x) < 2.0 ? 100000.0 : sdBox(q,vec3(0.25,1.75,0.25)),-1.0); vec2 res = cmin(vec2(f,0.0),tower); res = cmin(res,vec2(p.y+0.025,3.0)); return vec2(res); } vec2 d_body(vec3 p,float t){ vec3 r = abs(p); p.y -= max(0.0,sin(t*0.5*3.14)*0.125); p.z -= cos(t*0.5*3.14)*0.125; vec3 q = abs(p); //float d = max(max(q.x - 0.2,q.y - 0.2),q.z - 0.1); //float d = sdBox(r,vec3(0.3,0.3,0.1)); //d = min(d,sdBox(r,vec3(0.25,0.25,1.0))); float d = length(r.xy) - 0.35; d = max(d,-(r.z-0.2)); float d2 = length(r.xy) - 0.325; d2 = max(d2,-(r.z-0.15)); d = min(d,length(r.xy) - 0.3); d = max(d,-(r.z-0.1)); vec2 res = vec2(d,1.0); res = cmin(res,vec2(d2,2.0)); res = cmin(res,vec2(length(r.xy)-0.25,2.0)); vec3 s = p; s.xy *= genRot(time+p.z); s = abs(s); res = cmin(res,vec2(sdBox(s - vec3(0.0,0.6,0.0),vec3(0.125/2.0,0.125,0.05)),1.0)); res = cmin(res,vec2(sdBox(s - vec3(0.6,0.0,0.0),vec3(0.125,0.125/2.0,0.05)),1.0)); res = cmin(res,vec2(sdBox(s - vec3(0.0,0.6,0.0),vec3(0.1/2.0,0.15,0.04)),2.0)); res = cmin(res,vec2(sdBox(s - vec3(0.6,0.0,0.0),vec3(0.15,0.1/2.0,0.04)),2.0)); return vec2(res); } vec2 d_leg(vec3 p,float t){ float height = max(0.0,sin(t*0.5*3.14)*0.125); p.y -= height; p.z -= cos(t*0.5*3.14)*0.125; p.xy *= genRot(height*1.5); float d = 10000.0; //太棒 d = min(d,sdBox(p - vec3(0.75,0.75,0.0),vec3(0.05,0.4,0.05))); d = min(d,sdBox(p - vec3(0.75,0.75,0.0),vec3(0.07,0.35,0.07))); //横棒 d = min(d,sdBox(p - vec3(0.0,1.0,0.0),vec3(0.8,0.025,0.025))); //細棒 float d2 = 10000.0; d2 = min(d2,max(abs(p.x - 0.75) - 0.025,abs(p.z) - 0.025)); d2 = max(d2,-p.y); d2 = max(d2,p.y-1.25); d2 = min(d2,sdBox(p - vec3(0.75,1.25/2.0,0),vec3(0.025,1.25/2.0,0.025))); d2 = min(d2,sdBox(p - vec3(0.75,0.75,0.0),vec3(0.06,0.375,0.06))); //Donut vec2 q = vec2(length(p.xy - vec2(0.0,1.0))-0.4,p.z); d2 = min(d2,length(q)-0.025); d2 = max(d2,-(length(p.xy-vec2(0.0,1.0)) - (0.4-0.025))); //Donut d = min(d,length(q)-0.035); d = max(d,-sign((abs(p.x) - 0.2))); return cmin(vec2(d,1.0),vec2(d2,2.0)); } vec2 d_bodies(vec3 p){ p.z*=2.0; float st = floor(p.z+0.5); p.z/=2.0; vec3 q = vec3((p.xy - vec2(0.0,1.0) - path(p.z).xy),fract(p.z+0.5)-0.5); vec2 d = d_body(q,st*9.42+time*12.0); return d; } vec2 d_legs(vec3 p){ p = p - path(p.z); vec3 q = p; q.x = abs(p.x); q.z*=2.0; float st = floor(q.z+0.5)*sign(p.x); q.z = fract(q.z + 0.5)-0.5; q.z/=2.0; vec2 d = d_leg(q,st*9.42+time*12.0); return d; } vec2 map(vec3 p){ //p.x /= 3.0;a //p.x = fract(p.x+0.5)-0.5; //p.x *=3.0; vec2 d = d_floor(p); d = cmin(d,d_stream(p)); d = cmin(d,d_line(p - vec3(-1.0,2.0,0.0))); d = cmin(d,d_line(p - vec3(1.0,3.0,-5.0))); d = cmin(d,d_line(p - vec3(2.0,1.0,5.0))); p.z+=time*6.0/3.14; d = cmin(d,d_legs(p)); d = cmin(d,d_bodies(p)); return d; } vec3 getNormal(vec3 p){ float ep = 0.0001; return normalize(vec3( map(p).x - map(vec3(p.x - ep, p.y, p.z)).x, map(p).x - map(vec3(p.x, p.y - ep, p.z)).x, map(p).x - map(vec3(p.x, p.y, p.z - ep)).x )); } float Reflect(vec3 p,vec3 r,vec2 surface,float isHit,out vec3 o_p,out vec3 o_r,out vec3 hit_pos){ vec3 normal = getNormal(p); vec3 tmp_r = r; o_r = reflect(tmp_r,normal); hit_pos = isHit == 0.0 ? p : hit_pos; o_p = p + normal * 0.0015; return 1.0; } void trace_shadow(vec3 c,vec3 r,float t,out vec2 surface,out vec3 normal,out vec3 pos){ vec3 p = c; float dist = 0.0; float isHit = 0.0; vec2 d; for(int i = 0; i < 64; i++){ d = map(p); dist += d.x * 0.5; p += r *d.x*0.5; } surface = vec2(dist,d.x > 100.0 ? -10.0 : d.y); normal = getNormal(p); pos = isHit == 0.0 ? p : pos; pos = p; return; } vec4 getColor(vec2 surface,vec3 normal,vec3 cam,vec3 ray,vec3 pos,out float colmul){ float distFromCam = length(pos - cam); float fog = 1.0/(1.0 + distFromCam * distFromCam *0.00625); vec3 lightDir = normalize(vec3(1.0,-1.0,1.0)); vec2 _surface;vec3 _normal;vec3 _pos; trace_shadow(pos + normal * 0.01,-lightDir,time,_surface,_normal,_pos); float shadow = (_surface.x < 100.0 && _surface.y < 2.0) ? 0.0 : 1.0; shadow = surface.y == 2.0 ? 1.0 : shadow; shadow = surface.y == 3.0 ? 1.0 : shadow; vec3 baseCol = vec3(0.0); baseCol = surface.y == -1.0 ? vec3(-40, -40, -40)/255.0 : baseCol; baseCol = surface.y == 0.0 ? vec3(237, 242, 244)/8.0/255.0 : baseCol; baseCol = surface.y == 1.0 ? vec3(43, 45, 66)/255.0 : baseCol; baseCol = surface.y == 2.0 ? vec3(217, 4, 41)/255.0 : baseCol; baseCol = surface.y == 3.0 ? vec3(4, 41, 217)/255.0 : baseCol; colmul = surface.y == -1.0 ? colmul*0.75 : colmul; colmul = surface.y == 0.0 ? colmul*0.3 : colmul; colmul = surface.y == 1.0 ? colmul*0.1 : colmul; colmul = surface.y == 2.0 ? colmul*0. : colmul; colmul = surface.y == 3.0 ? colmul*0. : colmul; //vec3 baseCol = surface.y == 1.0 ? vec3(1.0,0.0,0.0) : (surface.y == 2.0 ? vec3(0.0,1.0,0.0) : vec3(1.0)); vec4 col = vec4(mix(baseCol*(shadow * 0.5 + 0.5),vec3(4, 41, 217)/255.0,1.0-fog), 1.0); return col; } vec4 getEmissionColor(vec2 surface){ vec4 res = surface.y == 2.0 ? vec4(vec3(217, 4, 41)/255.0/(0.1 + surface.x * surface.x),1.0) : vec4(0.0,0.0,0.0,1.0); res = surface.y == 3.0 ? vec4(vec3(4, 41, 217)/255.0/(0.1 + surface.x * surface.x),1.0) : res; return res; } vec4 trace(vec3 c,vec3 r,float t){ vec3 p = c; float dist = 0.0; float isHit = 0.0; vec2 d; vec3 pos; vec4 color = vec4(0.0,0.0,0.0,1.0); float colmul = 1.0; for(int i = 0; i < 128; i++){ d = map(p); dist += d.x * 0.5; p += r *d.x*0.5; color += getEmissionColor(d)*0.001; color += (d.x < 0.001) ? colmul*getColor(d,getNormal(p),c,r,p,colmul) : vec4(0.0); isHit = (d.x < 0.001) ? Reflect(p,r,d,isHit,p,r,pos) : isHit; //r = (d.y == 0.0 && d.x < 0.001) ? reflect(r,getNormal(p)) :r; //p = (d.y == 0.0 && d.x < 0.001) ? p + getNormal(p)*0.015 :p; } color += colmul*getColor(d,getNormal(p),c,r,p,colmul); return color; } float getScene(float t){ float s = fract(t/30.0)*30.0; float res = 4.0; res = (s < 24.0) ? 3.0 : res; res = (s < 18.0) ? 2.0 : res; res = (s < 12.0) ? 1.0 : res; res = (s < 6.0) ? 0.0 : res; return res; } vec3 ray(vec2 uv,float t){ vec3 r = vec3(uv,1.); float scene = getScene(t); r.xz = scene == 0.0 ? r.xz * genRot(-1.57) : r.xz; r.xz = scene == 1.0 ? r.xz * genRot(-0.2 - 0.1*(fract(time/6.0)*6.0)) : r.xz; r.yz= scene == 1.0 ? r.yz * genRot(-0.2 - 0.1*(fract(time/6.0)*6.0)) : r.yz; r.xz = scene == 2.0 ? r.xz * genRot(3.14/1.5*(fract(time/6.0))) : r.xz; r.yz = scene == 3.0 ? r.yz * genRot(-1.57) : r.yz; r = normalize(r); return r; } vec3 cam(float t){ vec3 c = vec3(0.0,0.5,-3.0+t*1.0); float scene = getScene(t); c.x -= (scene == 0.0 ? 3.0 : (0.0)); c.xy += scene == 1.0 ? vec2(1.0,1.5) : vec2(0.0); c.xy -= scene == 2.0 ? vec2(2.0,0.25) : vec2(0.0); c.yz += scene == 3.0 ? vec2(5.0,0.0) : vec2(0.0); c.yz -= scene == 4.0 ? vec2(0.25,0.0) : vec2(0.0); //c.xy += vec2(cos(t),sin(t)+0.5); //c.xy += vec2(1.0,1.5); //c += path(c.z); return c; } void main(void) { vec2 uv = (gl_FragCoord.xy * 2.0 - resolution.xy) / min(resolution.x, resolution.y); vec3 cam = cam(time); vec3 ray = ray(uv,time); vec2 surface;vec3 normal;vec3 pos; vec4 col = trace(cam,ray,time); gl_FragColor = col; //gl_FragColor = vec4(vec3(surface.x),1.0); //gl_FragColor = vec4(uv,0.0, 1.0); }

Neon Feet