Motion Blur + Chromatic Aberration

gistfile1.java

// by dave @ beesandbombs.tumblr.com >:)

void setup() {
  setup_();
  result = new int[width*height][3];
  result_ = new int[width*height][3];
}

int[][] result, result_;
float time;

void draw_() {
  if (aberrationAmount == 0.0) {
    draw__();
    return;
  }

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

  for (int a=0; a<3; a++) {
    pushMatrix();
    translate(width/2, height/2);
    scale(1+0.008*a*aberrationAmount);
    translate(-width/2, -height/2);
    draw__();
    popMatrix();
    loadPixels();
    for (int i=0; i<pixels.length; i++) {
      result_[i][a] = pixels[i] >> (8*(2-a)) & 0xff;
    }
  }

  loadPixels();
  for (int i=0; i<pixels.length; i++)
    pixels[i] = 0xff << 24 | result_[i][0] << 16 | 
      result_[i][1] << 8 | result_[i][2];
  updatePixels();
}

void draw() {
  if (shutterAngle == 0.0) {
    time = map(frameCount-1, 0, numFrames, 0, 1) % 1;
    draw_();
    return;
  }

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

  for (int sa=0; sa<samplesPerFrame; sa++) {
    time = 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 | (result[i][0]/samplesPerFrame) << 16 | 
      (result[i][1]/samplesPerFrame) << 8 | (result[i][2]/samplesPerFrame);
  updatePixels();

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

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

float aberrationAmount = 1; // 1 is quite a lot

int samplesPerFrame = 32;
int numFrames = 48;        
float shutterAngle = .5;

void setup_() {
  size(500,500,P2D);
}

void draw__() {
  background(0);
  fill(255);
  ellipse(width/2 + 100*sin(TWO_PI*time), height/2 + 100*sin(2*TWO_PI*time), 50, 50);
}