mirror of
https://github.com/Rezmason/matrix.git
synced 2026-04-17 05:49:30 -07:00
28 lines
825 B
GLSL
28 lines
825 B
GLSL
precision mediump float;
|
|
#define PI 3.14159265359
|
|
|
|
uniform sampler2D tex;
|
|
uniform sampler2D bloomTex;
|
|
uniform sampler2D stripes;
|
|
uniform float ditherMagnitude;
|
|
uniform float time;
|
|
uniform vec3 backgroundColor;
|
|
varying vec2 vUV;
|
|
|
|
highp float rand( const in vec2 uv, const in float t ) {
|
|
const highp float a = 12.9898, b = 78.233, c = 43758.5453;
|
|
highp float dt = dot( uv.xy, vec2( a,b ) ), sn = mod( dt, PI );
|
|
return fract(sin(sn) * c + t);
|
|
}
|
|
|
|
void main() {
|
|
vec3 color = texture2D(stripes, vUV).rgb;
|
|
// Combine the texture and bloom
|
|
float brightness = min(1., texture2D(tex, vUV).r * 2.) + texture2D(bloomTex, vUV).r;
|
|
|
|
// Dither: subtract a random value from the brightness
|
|
brightness = brightness - rand( gl_FragCoord.xy, time ) * ditherMagnitude;
|
|
|
|
gl_FragColor = vec4(color * brightness + backgroundColor, 1.0);
|
|
}
|