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24.12.2018

#photographers on tumblr #photooftheday #hamburg #osdorf #osdorfer born

#define MAX_OCTAVES 7 uniform vec2 u_resolution; float map(float value,float min1,float max1,float min2,float max2){ return min2+(value-min1)*(max2-min2)/(max1-min1); } float random(in vec2 st){ return fract(sin(dot(st.xy,vec2(12.9898,78.233)))*43758.5453123); } float noise(in vec2 st){ vec2 i=floor(st); vec2 f=fract(st); float a=random(i); float b=random(i+vec2(1.,.0)); float c=random(i+vec2(.0,1.)); float d=random(i+vec2(1.,1.)); vec2 u=f*f*(3.-2.*f); return mix(a,b,u.x)+(c-a)*u.y*(1.-u.x)+(d-b)*u.x*u.y; } float fbm(in vec2 n,in float l){ float v=.0; float lacunarity=2.; float a=.75; n*=l; for(int i=0;i0.;i--){ y=i/(3.0*i)*m*(fbm(.2*m*coords*i,1./(3.0+i))-.75)+i*2./(3.0+i); pct=plot(st,y); color=mix(color,vec3(map(i,.0,3.0,colorA.r,colorB.r),map(i,.0,3.0,colorA.g,colorB.g),map(i,.0,3.0,colorA.b,colorB.b)),pct); } gl_FragColor=vec4(color,1.); }