half boxes

halfBoxes.pde

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));

float c01(float g) {
  return constrain(g, 0, 1);
}

void draw() {
  if (recording) {
    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###.png");
    if (frameCount==numFrames)
      exit();
  } else if (preview) {
    c = mouseY*1.0/height;
    if (mousePressed)
      println(c);
    t = (millis()/(20.0*numFrames))%1;
    draw_();
  } else {
    t = mouseX*1.0/width;
    c = mouseY*1.0/height;
    if (mousePressed)
      println(c);
    draw_();
  }
}

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

int samplesPerFrame = 2;
int numFrames = 400;        
float shutterAngle = .6;

boolean recording = false, 
  preview = true;

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

color c1a = #F1856A, c1b = #EA481F, 
  c2a = #FFDE70, c2b = #FFBC1F, 
  c3a = #4E68D0, c3b = #1734A6;

void halfBox() {
  push();
  translate(0, 0, l/2);
  gradientRectangle(c1a, c1b);
  pop();

  push();
  rotateY(HALF_PI);
  translate(0, 0, l/2);
  gradientRectangle(c2a, c2b);
  pop();

  push();
  rotateX(HALF_PI);
  translate(0, 0, l/2);
  gradientRectangle(c3a, c3b);
  pop();
}

void gradientRectangle(color c1_, color c2_) {
  push();
  rotate(HALF_PI*int(random(4)));
  
  beginShape();
  fill(c1_);
  vertex(-l/2, -l/2);
  vertex(l/2, -l/2);

  fill(c2_);
  vertex(l/2, l/2);
  vertex(-l/2, l/2);
  endShape();
  
  pop();
}

float l = 50, sp = 2*l;
int N = 8;

void draw_() {
  randomSeed(12345);
  background(#FAFEFF);
  push();
  translate(width/2, height/2);
  scale(1, 1, -1);
  rotateX(-ia);
  rotateY(QUARTER_PI);
  rotateX(HALF_PI);
  
  for (int i=-N; i<N; i++) {
    for (int j=-N; j<N; j++) {
      push();
      translate((i+.5)*sp, (j+.5)*sp, 0);
      rotate(TWO_PI*t - 0.2*(i+j));
      halfBox();
      pop();
    }
  }
  
  pop();
}