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import peasy.*;
import peasy.org.apache.commons.math.*;
import peasy.org.apache.commons.math.geometry.*;
import peasy.test.*;

PeasyCam cam;

PImage moonImg;

float[] colorData;

int stepSize = 2;

void setup() {
    
  size(500, 500, P3D);
  cam = new PeasyCam(this, 500);
  moonImg = loadImage("415183808_9d19a12439.jpg");
  cam.setMinimumDistance(50);
  cam.setMaximumDistance(500);

  noStroke();

  int _sumNum = 500 * 500;
  colorData = new float[_sumNum];

  for (int j=0; j<500; j+=stepSize) {
    for (int i=0; i<500; i+=stepSize) {
      int _index = i + j * 500;
      color _c = moonImg.get(i, j);
      float _sum = red(_c) + green(_c) + blue(_c);
      colorData[_index] = _sum / 3.0;

    }
  }
  
}


void draw() {

  background(0);

  translate(-250, -250);
  //image(moonImg, 0, 0);

  for (int j=0; j<500; j+=stepSize) {
    for (int i=0; i<500; i+=stepSize) {

      int _index = i + j * 500;
      fill(colorData[_index]);

      pushMatrix();
      float _zPos = map(colorData[_index], 0, 255, 0, 100);
      translate(0, 0, _zPos);
      rect(i, j, stepSize, stepSize);
      popMatrix();
    }
  }
  
}