gistfile1.pde

// Processing motion blur
// 'time' runs from 0 to 1
// ignore everything above the /////////
// by Dave @ beesandbombs

int[][] result;
float time;

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

void draw() {
  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();
}

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

int samplesPerFrame = 16;
int numFrames = 96;        
float shutterAngle = .6;

void setup_() {
  size(500, 500, P2D);
  smooth(8);
  rectMode(CENTER);
  background(0);
  fill(255); 
  noStroke();
  pushMatrix();
  translate(width/2,height/2);
  rotate(QUARTER_PI);
  for (int i=-N; i<=N; i++) {
    for (int j=-N; j<=N; j++) {
      x = i*sp; 
      y = j*sp;
      if ((i+j)%2 == 0)
        rect(x, y, sp, sp);
    }
  }
  popMatrix();

  msk = get();
}


int N = 6;
float w = 11, h = 265, o = 50, sp = 16;
float t;
float x, y;

PImage msk, fr;


void draw_() {
  t = time;
  background(16);
  
  pushMatrix();
  translate(width/2,height/2);
  rotate(QUARTER_PI);

  for (int i=-N; i<=N; i++) {
    x = i*sp; 
    y = o*sin(TWO_PI*i/(2*N+1) - TWO_PI*t);
    fill(240, 0, 0);
    rect(x, y, w, h, 3);
  }

  for (int i=-N; i<=N; i++) {
    y = i*sp; 
    x = o*sin(TWO_PI*i/(2*N+1) - TWO_PI*t);
    fill(16, 80);
    rect(x+1, y+1, h+2, w+2, 4);
    fill(220);
    rect(x, y, h, w, 3);
  }

  fr = get();
  fr.mask(msk);

  background(16);
  for (int i=-N; i<=N; i++) {
    y = i*sp; 
    x = o*sin(TWO_PI*i/(2*N+1) - TWO_PI*t);
    rect(x, y, h, w, 3);
  }
  fill(255, 0, 0);
  for (int i=-N; i<=N; i++) {
    x = i*sp; 
    y = o*sin(TWO_PI*i/(2*N+1) - TWO_PI*t);
    fill(16, 80);
    rect(x+1, y+1, w+2, h+2, 4);
    fill(240, 0, 0);
    rect(x, y, w, h, 3);
  }
  
  popMatrix();

  image(fr, 0, 0);
}