Live-Coding-Sources/2019-11-30/07-novac.glsl

#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 = 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 );
}

float d(vec2 uv, float ff){
    uv.x += sin(fGlobalTime*2);
    uv.y += sin(fGlobalTime);
    uv.x *= fract(uv.x *10 * cos(fGlobalTime ));
    uv.y *= fract(uv.y *10 * sin(fGlobalTime ));

    uv.x += (1 + sin(fGlobalTime)) * 2 * ff;
    uv.y += (1 + cos(fGlobalTime)) * 2 * ff;
    
    return step(length(uv), 0.2);
}
 
void main(void)
{
  vec2 uv = vec2(gl_FragCoord.x / v2Resolution.x, gl_FragCoord.y / v2Resolution.y);
  float texFFT = texture(texNoise, uv).r;
  float rfft = texFFT;
  uv -= 0.5;
  uv /= vec2(v2Resolution.y / v2Resolution.x, 1);
  float dd = d(uv, rfft);
  vec4 color = vec4(dd,dd,dd,1);
  color+=rfft;
  out_color = color;
}