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.
124 lines
3.9 KiB
GLSL
124 lines
3.9 KiB
GLSL
// Author @patriciogv - 2015
|
|
// Title: Ikeda Numered Grid
|
|
|
|
#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;
|
|
}
|
|
|
|
float grid(vec2 st, float res){
|
|
vec2 grid = fract(st*res);
|
|
return 1.-(step(res,grid.x) * step(res,grid.y));
|
|
}
|
|
|
|
float box(in vec2 st, in vec2 size){
|
|
size = vec2(0.5) - size*0.5;
|
|
vec2 uv = smoothstep(size,
|
|
size+vec2(0.001),
|
|
st);
|
|
uv *= smoothstep(size,
|
|
size+vec2(0.001),
|
|
vec2(1.0)-st);
|
|
return uv.x*uv.y;
|
|
}
|
|
|
|
float cross(in vec2 st, vec2 size){
|
|
return clamp(box(st, vec2(size.x*0.5,size.y*0.125)) +
|
|
box(st, vec2(size.y*0.125,size.x*0.5)),0.,1.);
|
|
}
|
|
|
|
void main(){
|
|
vec2 st = gl_FragCoord.st/u_resolution.xy;
|
|
st.x *= u_resolution.x/u_resolution.y;
|
|
|
|
vec3 color = vec3(0.0);
|
|
|
|
// Grid
|
|
vec2 grid_st = st*300.;
|
|
color += vec3(0.5,0.,0.)*grid(grid_st,0.01);
|
|
color += vec3(0.2,0.,0.)*grid(grid_st,0.02);
|
|
color += vec3(0.2)*grid(grid_st,0.1);
|
|
|
|
// Crosses
|
|
vec2 crosses_st = st + .5;
|
|
crosses_st *= 3.;
|
|
vec2 crosses_st_f = fract(crosses_st);
|
|
color *= 1.-cross(crosses_st_f,vec2(.3,.3));
|
|
color += vec3(.9)*cross(crosses_st_f,vec2(.2,.2));
|
|
|
|
// Digits
|
|
vec2 digits_st = mod(st*60.,20.);
|
|
vec2 digits_st_i = floor(digits_st);
|
|
if (digits_st_i.y == 1. &&
|
|
digits_st_i.x > 0. && digits_st_i.x < 6. ) {
|
|
vec2 digits_st_f = fract(digits_st);
|
|
float pct = random(digits_st_i+floor(crosses_st)+floor(u_time*20.));
|
|
color += vec3(char(digits_st_f,100.*pct));
|
|
} else if (digits_st_i.y == 2. &&
|
|
digits_st_i.x > 0. && digits_st_i.x < 8. ) {
|
|
vec2 digits_st_f = fract(digits_st);
|
|
float pct = random(digits_st_i+floor(crosses_st)+floor(u_time*20.));
|
|
color += vec3(char(digits_st_f,100.*pct));
|
|
}
|
|
gl_FragColor = vec4( color , 1.0);
|
|
}
|