Cacher is the code snippet organizer for pro developers

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 = 7;

PShape s;

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;
    }
  }


  float _height = 0.5;

  s = createShape();
  s.beginShape();
  s.texture(moonImg);
  for (int j=0; j<500-stepSize; j+=stepSize) {
    for (int i=0; i<500-stepSize; i+=stepSize) {
      s.vertex(i, j, red(moonImg.get(i, j))*_height, i, j);
      s.vertex(i, j+500*stepSize, red(moonImg.get(i, j+500*stepSize))*_height, i, j+500*stepSize);
      s.vertex(i+stepSize, j+500*stepSize, red(moonImg.get(i+stepSize, j+500*stepSize))*_height, i+stepSize, j+500*stepSize);
      s.vertex(i+stepSize, j, red(moonImg.get(i+stepSize, j))*_height, i+stepSize, j);
    }
  }
  s.endShape(CLOSE);
  
}


void draw() {

  background(0);

  translate(-250, -250);
  shape(s);
  
}