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.
50 lines
1.2 KiB
GLSL
50 lines
1.2 KiB
GLSL
// Author @patriciogv - 2015
|
|
// Title: Ikeda Data Stream
|
|
|
|
#ifdef GL_ES
|
|
precision mediump float;
|
|
#endif
|
|
|
|
uniform vec2 u_resolution;
|
|
uniform vec2 u_mouse;
|
|
uniform float u_time;
|
|
|
|
float random (in float x) {
|
|
return fract(sin(x)*1e4);
|
|
}
|
|
|
|
float random (in vec2 st) {
|
|
return fract(sin(dot(st.xy, vec2(12.9898,78.233)))* 43758.5453123);
|
|
}
|
|
|
|
float pattern(vec2 st, vec2 v, float t) {
|
|
vec2 p = floor(st+v);
|
|
return step(t, random(100.+p*.000001)+random(p.x)*0.5 );
|
|
}
|
|
|
|
void main() {
|
|
vec2 st = gl_FragCoord.xy/u_resolution.xy;
|
|
st.x *= u_resolution.x/u_resolution.y;
|
|
|
|
vec2 grid = vec2(100.0,50.);
|
|
st *= grid;
|
|
|
|
vec2 ipos = floor(st); // integer
|
|
vec2 fpos = fract(st); // fraction
|
|
|
|
vec2 vel = vec2(u_time*2.*max(grid.x,grid.y)); // time
|
|
vel *= vec2(-1.,0.0) * random(1.0+ipos.y); // direction
|
|
|
|
// Assign a random value base on the integer coord
|
|
vec2 offset = vec2(0.1,0.);
|
|
|
|
vec3 color = vec3(0.);
|
|
color.r = pattern(st+offset,vel,0.5+u_mouse.x/u_resolution.x);
|
|
color.g = pattern(st,vel,0.5+u_mouse.x/u_resolution.x);
|
|
color.b = pattern(st-offset,vel,0.5+u_mouse.x/u_resolution.x);
|
|
|
|
// Margins
|
|
color *= step(0.2,fpos.y);
|
|
|
|
gl_FragColor = vec4(1.0-color,1.0);
|
|
} |