shader.glsl

#version 410 core

uniform float fGlobalTime; // in seconds
uniform vec2 v2Resolution; // viewport resolution (in pixels)
uniform float fFrameTime; // duration of the last frame, in seconds

uniform sampler1D texFFT; // towards 0.0 is bass / lower freq, towards 1.0 is higher / treble freq
uniform sampler1D texFFTSmoothed; // this one has longer falloff and less harsh transients
uniform sampler1D texFFTIntegrated; // this is continually increasing
uniform sampler2D texPreviousFrame; // screenshot of the previous frame
uniform sampler2D texChecker;
uniform sampler2D texNoise;
uniform sampler2D texTex1;
uniform sampler2D texTex2;
uniform sampler2D texTex3;
uniform sampler2D texTex4;

#define  iTime fGlobalTime
layout(location = 0) out vec4 out_color; // out_color must be written in order to see anything

vec3 pal(float t){
    return .5+.5*cos(2.*3.141592*(1.*t+vec3(.0,.3,.7)));
}
mat2 rot(float a){
    float c=cos(a),s=sin(a);
    return mat2(c,-s,s,c);
}
void main(void)
{
	vec2 uv = vec2(gl_FragCoord.x / v2Resolution.x, gl_FragCoord.y / v2Resolution.y);

	
  uv -= 0.5;
  
	uv /= vec2(v2Resolution.y / v2Resolution.x, 1);
vec2 id = (floor(uv*5.))*0.; // biome change, unused if *0.;
        // Time varying pixel color
    vec3 col = vec3(0.);

    

    
    vec2 cpos = uv+vec2(sin(iTime),cos(iTime*.33))*.5;
    float d = length(cpos)-.10-sin(iTime*.77)*.05+.05;
    d= smoothstep(.01,.001,abs(d)-.0004);
    col = vec3(d);
    
    
    vec2 puv = ((uv*v2Resolution.y)+(.5*v2Resolution.xy))/v2Resolution.xy;
    
    vec4 acc = vec4(0.);
    for(float x=-1.;x<=1.;x++){
        for(float y=-1.;y<=1.;y++){
               acc += texture(texPreviousFrame,(puv+vec2(x,y)*.001));
            }
    }
    
    
    vec4 pcol = vec4(0.,0.,0.,1.);
    
    for(int i=0;i<5;i++){
        if(acc[i] >.3 && acc[i] <1.0 ){
            if(acc[int(mod(float(i),3.))] >= 2.0*( acc[int(mod(float(i+1),3.))]  + acc[int(mod(float(i+2),3.))]) && 
            acc[i] >= .002*acc[int(mod(float(i+1)+mod(length(id),2.0),3.))]
            ) {
                pcol[i] += acc[i]+ acc[int(mod(float(i+1)+mod(length(id),2.0),3.))];
                pcol[int(mod(float(i+1),3.))]= acc[int(mod(float(i+1)+mod(length(id),2.0),3.))]/2.*9.201;
            } else {
             //pcol[i] *= acc[i];
            }
        } else if(acc[i] >=1.0){ pcol[i]= acc[i]/9.201;}
    }
    pcol = pcol*1.0;
    
    
    out_color = vec4(col*pal(iTime*1.33+atan(cpos.x,cpos.y)*2.),1.0)+pcol; 
	//out_color = fcol;
}