You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
83 lines
2.6 KiB
GLSL
83 lines
2.6 KiB
GLSL
// Author @patriciogv - 2015
|
|
// Title: Ikeda Digits
|
|
|
|
#ifdef GL_ES
|
|
precision mediump float;
|
|
#endif
|
|
|
|
// Copyright (c) Patricio Gonzalez Vivo, 2015 - http://patriciogonzalezvivo.com/
|
|
// I am the sole copyright owner of this Work.
|
|
//
|
|
// You cannot host, display, distribute or share this Work in any form,
|
|
// including physical and digital. You cannot use this Work in any
|
|
// commercial or non-commercial product, website or project. You cannot
|
|
// sell this Work and you cannot mint an NFTs of it.
|
|
// I share this Work for educational purposes, and you can link to it,
|
|
// through an URL, proper attribution and unmodified screenshot, as part
|
|
// of your educational material. If these conditions are too restrictive
|
|
// please contact me and we'll definitely work it out.
|
|
|
|
uniform vec2 u_resolution;
|
|
uniform float u_time;
|
|
|
|
float random(in float x){ return fract(sin(x)*43758.5453); }
|
|
// float random(in vec2 st){ return fract(sin(dot(st.xy ,vec2(12.9898,78.233))) * 43758.5453); }
|
|
float random(vec2 p) { return fract(1e4 * sin(17.0 * p.x + p.y * 0.1) * (0.1 + abs(sin(p.y * 13.0 + p.x)))); }
|
|
|
|
float bin(vec2 ipos, float n){
|
|
float remain = mod(n,33554432.);
|
|
for(float i = 0.0; i < 25.0; i++){
|
|
if ( floor(i/3.) == ipos.y && mod(i,3.) == ipos.x ) {
|
|
return step(1.0,mod(remain,2.));
|
|
}
|
|
remain = ceil(remain/2.);
|
|
}
|
|
return 0.0;
|
|
}
|
|
|
|
float char(vec2 st, float n){
|
|
st.x = st.x*2.-0.5;
|
|
st.y = st.y*1.2-0.1;
|
|
|
|
vec2 grid = vec2(3.,5.);
|
|
|
|
vec2 ipos = floor(st*grid);
|
|
vec2 fpos = fract(st*grid);
|
|
|
|
n = floor(mod(n,10.));
|
|
float digit = 0.0;
|
|
if (n < 1. ) { digit = 31600.; }
|
|
else if (n < 2. ) { digit = 9363.0; }
|
|
else if (n < 3. ) { digit = 31184.0; }
|
|
else if (n < 4. ) { digit = 31208.0; }
|
|
else if (n < 5. ) { digit = 23525.0; }
|
|
else if (n < 6. ) { digit = 29672.0; }
|
|
else if (n < 7. ) { digit = 29680.0; }
|
|
else if (n < 8. ) { digit = 31013.0; }
|
|
else if (n < 9. ) { digit = 31728.0; }
|
|
else if (n < 10. ) { digit = 31717.0; }
|
|
float pct = bin(ipos, digit);
|
|
|
|
vec2 borders = vec2(1.);
|
|
// borders *= step(0.01,fpos.x) * step(0.01,fpos.y); // inner
|
|
borders *= step(0.0,st)*step(0.0,1.-st); // outer
|
|
|
|
return step(.5,1.0-pct) * borders.x * borders.y;
|
|
}
|
|
|
|
void main(){
|
|
vec2 st = gl_FragCoord.st/u_resolution.xy;
|
|
st.x *= u_resolution.x/u_resolution.y;
|
|
|
|
float rows = 34.0;
|
|
vec2 ipos = floor(st*rows);
|
|
vec2 fpos = fract(st*rows);
|
|
|
|
ipos += vec2(0.,floor(u_time*20.*random(ipos.x+1.)));
|
|
float pct = random(ipos);
|
|
vec3 color = vec3(char(fpos,100.*pct));
|
|
color = mix(color,vec3(color.r,0.,0.),step(.99,pct));
|
|
|
|
gl_FragColor = vec4( color , 1.0);
|
|
}
|