precision highp float; uniform vec2 resolution; uniform float time; uniform vec2 mouse; uniform sampler2D backbuffer; const float pi = acos(-1.0); mat2 rotate(float a) { return mat2(cos(a), -sin(a), sin(a), cos(a)); } vec2 pmod(vec2 p, float n) { float a = 2.*pi/n; float theta = atan(p.y, p.x) + 0.5*a; theta = floor(theta/a)*a; return p*rotate(-theta); } vec3 hsv2rgb(float h, float s, float v) { return ((clamp(abs(fract(h+vec3(0,2,1)/3.)*6.-3.)-1.,0.,1.)-1.)*s+1.)*v; } /*vec3 hsv2rgb(float h, float s, float v) { float c_max = v; float c_min = c_max-s*c_max; float r,g,b; h = mod(h, 1.); h *= 6.; if(h < 1.) { r = c_max; g = h*(c_max-c_min) + c_min; b = c_min; } else if(h < 2.) { r = (2.-h)*(c_max-c_min) + c_min; g = c_max; b = c_min; } else if(h < 3.) { r = c_min; g = c_max; b = (h-2.)*(c_max-c_min) + c_min; } else if(h < 4.) { r = c_min; g = (4.-h)*(c_max-c_min) + c_min; b = c_max; } else if(h < 5.) { r = (h-4.)*(c_max-c_min) + c_min; g = c_min; b = c_max; } else if(h < 6.) { r = c_max; g = c_min; b = (6.-h)*(c_max-c_min) + c_min; } return vec3(r,g,b); }*/ float rand2(vec2 p) { return fract(sin(dot(p, vec2(12.5322, 57.2115)))*65231.1264); } float distBox(vec3 p, float size) { return length(max(abs(p)-size, 0.))-size*0.5; } const float num = 5.; float interval_xy; float interval_z = 15.; float dist(vec3 p) { float d = 1e5; vec3 z; p.xy = mod(p.xy, interval_xy) - 0.5*interval_xy; for(float i=0.; i temp.y && temp.x > temp.z) { fPos = Pos.yz; } else if(temp.y > temp.z && temp.y > temp.x) { fPos = Pos.zx; } else { fPos = Pos.xy; } fPos /= num; fPos *= rotate(time*2.); float s = 0.06; vec2 z; z = fPos; z = pmod(z, 3.); base *= s/abs(z.x-0.3); z = fPos*rotate(pi/3.); z = pmod(z, 3.); base *= s/abs(z.x-0.3); z = fPos; base *= s/length(z-normalize(z)*0.6); float spec = pow(max(dot(lightDir, normal), 0.), 30.); color = base + spec; } float fog = exp2Fog(length(rPos-cPos), 0.01); color = mix(vec3(1), color, fog); gl_FragColor = vec4(color, 1.0); }

Magic Boxes