#define GLSLIFY 1
/*
* The main program
*/
void main() {
// Vertex shader output
gl_Position = vec4(position, 1.0);
}
uniform vec2 u_resolution;
uniform float u_time;
float rand(vec2 n) {
return fract(sin(dot(n, vec2(12.9898, 4.1414))) * 43758.5453);
}
float noise(vec2 p) {
vec2 ip = floor(p);
vec2 u = fract(p);
u = u*u*(3.0-2.0*u);
float res = mix(
mix(rand(ip),rand(ip+vec2(1.0,0.0)),u.x),
mix(rand(ip+vec2(0.0,1.0)),rand(ip+vec2(1.0,1.0)),u.x),u.y);
return res*res;
}
const mat2 m2 = mat2(0.8,-0.6,0.6,0.8);
float fbm( in vec2 p ){
float f = 0.0;
f += 0.5000*noise( p ); p = m2*p*2.02;
f += 0.2500*noise( p ); p = m2*p*2.03;
f += 0.1250*noise( p ); p = m2*p*2.01;
f += 0.0625*noise( p );
return f/0.769;
}
float pattern( in vec2 p ) {
vec2 q = vec2(fbm(p + vec2(0.0,0.0)));
vec2 r = vec2( fbm( p + 4.0*q + vec2(1.7,9.2)));
r+= u_time * 0.15;
return fbm( p + 1.760*r );
}
void main() {
vec2 uv = gl_FragCoord.xy/u_resolution.xy;
uv *= 4.5; // Scale UV to make it nicer in that big screen !
float displacement = pattern(uv);
vec4 color = vec4(displacement * 1.2, 0.2, displacement * 5., 1.);
color.a = min(color.r * 0.25, 1.); // Depth for CineShader
gl_FragColor = color;
}
