outline_shader.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
float fMidiKnob;
float time = fGlobalTime;

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 );
}

mat2 rot(float a)
{
  return mat2(cos(a),sin(a),-sin(a),cos(a));
}

vec4 skybox(vec3 rd)
{
  if (rd.y < 0) return mix(vec4(0,0,0,0), vec4(0.5,0.2,0.1,1), rd.y+1);
  return mix(vec4(0.1,0.4,0.7,1),vec4(0,0,0.2,1), rd.y);
}

void main(void)
{
  vec2 uv = vec2(gl_FragCoord.x / v2Resolution.x, gl_FragCoord.y / v2Resolution.y);

  uv -= 0.5;

  uv.y += pow(texture(texFFTSmoothed, 0.2*abs(uv.x)).x,0.6) ;
  uv.x += pow(texture(texFFTSmoothed, 0.2*abs(uv.y)).x,0.6) ;

  uv /= vec2(v2Resolution.y / v2Resolution.x, 1);

  //vec3 cp = vec3(0,2,-5);
  //vec3 rd = normalize(vec3(uv,0.1));

  //vec4 sky = skybox(rd);


  //uv *= rot(40*a);

  float a = 100*texture(texFFTIntegrated, 0.1).x;
  vec2 squv = uv * rot(a);
  squv.x += 0.3*sin(texture(texFFTIntegrated,0.01).x*2.7);
  squv.y += 0.3*1.7777*sin(texture(texFFTIntegrated,0.02).x*2.3);
  float x = 8*sin(400*texture(texFFTIntegrated,0.03).x)+13;

  float square = pow(clamp((1-max(0, x*abs(squv.x)-1)),0,1) * clamp((1-max(0, x*abs(squv.y)-1)),0,1),2.);


  float t = time * 0.1;
uv *= 1.0 + 400*texture(texFFTSmoothed, 0.01).xx;
vec2 uv2 = uv;
  uv.x += 0.1*sin(t)*sin(uv.y*11 + time);
  uv.y += 0.1*sin(-t+1)*sin(uv.x*13 + time*1.3);
  uv.x += 0.1*sin(-t+2)*sin(uv.y*17 + time*1.7);
  uv.y += 0.1*sin(t+3)*sin(uv.x*19 + time*2.1);
  uv.x += 0.1*sin(-t+4)*sin(uv.y*21 + time*3.3);
  uv.y += 0.1*sin(-t+5)*sin(uv.x*23 + time*0.6);
  uv.x += 0.1*sin(t+6)*sin(uv.y*29 + time*0.4);
  uv.y += 0.1*sin(-t+7)*sin(uv.x*31 + time*4.2);
  uv.x += 0.1*sin(t+8)*sin(uv.y*34 + time);
  uv -= uv2;

  vec3 d = normalize(vec3(uv,0.2));

  out_color = vec4(0.2,0.5,1,1)*pow(clamp(dot(d,normalize(vec3(1,1,1))),0,1),8)*clamp(sin(time*3.3),0,1);
  out_color += vec4(1,0.5,0.2,1)*pow(clamp(dot(d,normalize(vec3(-1,1,1))),0,1),8)*clamp(sin(time*5.2),0,1);;
  out_color += vec4(0.8,0.2,0.8,1)*pow(clamp(dot(d,normalize(vec3(1,-1,1))),0,1),8)*clamp(sin(time*3.7),0,1);
  out_color += vec4(1,0.8,0.1,1)*pow(clamp(dot(d,normalize(vec3(-1,-1,1))),0,1),8)*clamp(sin(time*4.1),0,1);;
  out_color += vec4(1,1,1,1)*pow(clamp(dot(d,normalize(vec3(0,0,1))),0,1),25);

  out_color = mix(vec4(1,0.0,0.0,1),out_color,1-square);

  out_color.xyz /= 4*length(uv2.xy);


}