enter the noise

enter_the_noise.pde

double[] map;
int charwidth = 20;
int cellW, cellH;

float xSpeed = 0.005;
float ySpeed = 0.005;
float step = 0.10;
float xOffset = 0;
float yOffset = 0;
float xPos = 0;
float yPos = 0;



void setup() {
  size(1024,768, P3D);
  colorMode(HSB, 255, 255, 255);
  cellW = width/charwidth;
  cellH = cellW;
  
  map = new double[cellW*cellH];  
  
}

void update() {
   
  step = 0.5 * sin((TWO_PI * frameCount)/(60*frameRate));
  xPos = xOffset;
  yPos = yOffset;
  for (int i = 0; i < map.length; i++) {
    map[i] = noise(xPos, yPos);
    // if we jump a row, add one step to yPos
    // but bring back xPos to what it was.
    if ((i % cellW) == 0) {
      yPos += step;
      xPos -= step * cellW;
    }
    xPos += step;
  }
  xOffset += xSpeed;
  yOffset += ySpeed;
  
}

void draw() {
//  background(255);

  fill(20, 50);
  noStroke();
  rect(0, 0, width, height);
  update();
  translate(charwidth/2, charwidth/2);
  for (int i = 0; i < map.length; i++) {
    pushMatrix();
    translate((i % cellW) * charwidth, floor(i / cellH) * charwidth);
    strokeWeight(charwidth/2);

    rotate((int) (2*PI/map[i]));
    beginShape();
    float factor = 1;//(float) map[i];
    stroke((int) (map[i]*255), 255, 255, 150);
    if (map[i] >= 0.5) {
      vertex(-charwidth * factor, -charwidth * factor, charwidth * (float) map[i]);
      vertex(charwidth * factor, charwidth * factor, charwidth * (float) map[i]);
    } else {
      vertex(-charwidth * factor, charwidth * factor, charwidth * (float) map[i]);
      vertex(charwidth * factor, -charwidth * factor, charwidth * (float) map[i]);
    }
    
    endShape();
    popMatrix(); 
  }
}