#version 410 core

uniform float fGlobalTime; // in seconds
uniform vec2 v2Resolution; // viewport resolution (in pixels)

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 texChecker;
uniform sampler2D texNoise;
uniform sampler2D texTex1;
uniform sampler2D texTex2;
uniform sampler2D texTex3;
uniform sampler2D texTex4;

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

vec4 plas( vec2 v, float time )
{
  float c = cos(atan(tan(0.5 + sin( v.x * 10.0 ) + cos( sin( time + v.y ) * 20.0 ))));
  return vec4( sin(c * 0.2 + cos(time)), c * 0.15, cos( c * 0.1 + time / .4 ) * .25, 1.0 );
}
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 m;
  m.x = atan(uv.x / uv.y) / 666;
  m.y = sin(tan(1 / length(uv) * .666));
  float d = m.y;

  float f = texture( texFFT, d ).r * 1;
  m.x += sin( fGlobalTime ) * 0.1;
  m.y += fGlobalTime * 0.25;
  
  vec4 t = plas(m*3.14, fGlobalTime) * d ;
     
  out_color = atan(sin(tan(f + t*3.14569898898989895466465))) ;
  //out_color = f * 0.1 + fGlobalTime + uv.x;
}