int[][] result;
float t, c;

float ease(float p) {
  return 3*p*p - 2*p*p*p;
}

float ease(float p, float g) {
  if (p < 0.5)
    return 0.5 * pow(2*p, g);
  else
    return 1 - 0.5 * pow(2*(1 - p), g);
}

float mn = .5*sqrt(3), ia = atan(sqrt(.5));

void push() {
  pushMatrix();
  pushStyle();
}

void pop(){
  popStyle();
  popMatrix();
}

void draw() {

  if(!recording){
    t = mouseX*1.0/width;
    c = mouseY*1.0/height;
    if(mousePressed)
        println(c);
    draw_();
  }

  else {
    for (int i=0; i<width*height; i++)
      for (int a=0; a<3; a++)
        result[i][a] = 0;

    c = 0;
    for (int sa=0; sa<samplesPerFrame; sa++) {
      t = map(frameCount-1 + sa*shutterAngle/samplesPerFrame, 0, numFrames, 0, 1);
      draw_();
      loadPixels();
      for (int i=0; i<pixels.length; i++) {
        result[i][0] += pixels[i] >> 16 & 0xff;
        result[i][1] += pixels[i] >> 8 & 0xff;
        result[i][2] += pixels[i] & 0xff;
      }
    }

    loadPixels();
    for (int i=0; i<pixels.length; i++)
      pixels[i] = 0xff << 24 |
        int(result[i][0]*1.0/samplesPerFrame) << 16 |
        int(result[i][1]*1.0/samplesPerFrame) << 8 |
        int(result[i][2]*1.0/samplesPerFrame);
    updatePixels();

    saveFrame("f###.gif");
    if (frameCount==numFrames)
      exit();
  }
}

//////////////////////////////////////////////////////////////////////////////

int samplesPerFrame = 4;
int numFrames = 240;
float shutterAngle = .6;

boolean recording = false;

void setup() {
  size(800,600,P3D);
  pixelDensity(recording ? 1 : 2);
  smooth(8);
  result = new int[width*height][3];
  rectMode(CENTER);
  noFill();
  strokeWeight(17);
  blendMode(ADD);
}

float x, y, z, tt;
int N = 15;
color[] cs = { #FF2116, #01FF40, #0050E0 };
float sp = 30, l = 440;
float qq, th;
int n = 40;

void thing(float q){
  beginShape();
  for(int i=0; i<n; i++){
    qq = i/float(n-1);
    x = 0;
    y = lerp(-l/2,l/2,qq);
    th = .35*sin(TWO_PI*q - HALF_PI*qq);
    curveVertex(x*cos(th) + y*sin(th),y*cos(th) - x*sin(th));
  }
  endShape();
}

void draw_() {
  background(20);
  push();
  translate(width/2, height/2);
  for(int i=-N; i<=N; i++){
    tt = t + i/3.1;
    push();
    stroke(cs[(i+N)%3]);
    translate(i*sp,0);
    thing(tt);
    pop();
  }
  pop();
}