/* built with Studio Sketchpad: 
 *   https://sketchpad.cc
 * 
 * observe the evolution of this sketch: 
 *   https://studio.sketchpad.cc/sp/pad/view/ro.dVC7eI4p$nL/rev.743
 * 
 * authors: 
 *   cathy

 * license (unless otherwise specified): 
 *   creative commons attribution-share alike 3.0 license.
 *   https://creativecommons.org/licenses/by-sa/3.0/ 
 */ 



// This sketch builds on a prior work, "Untitled Sketch", created by andor & jbuck & [unnamed author]
// http://sketchpad.cc/sp/pad/view/ro.Op7D7jlSYfN/rev.300



/*
  Andor Salga
  Sol
  Processing compliant
*/

import processing.opengl.*;

float rotEarth = 0.0;
float rotMoon = 0.0;
float zoom = 0;
PFont infoFont;
int red=0;
int blue=100;
int green=150;
int redinc=1;
int blueinc=1;
int greeninc=1;
int lighty = 100;
int lightz = 400;
int lightx = 0;
float shine =1;
float shineinc=0.1;
void setup(){
  size(400, 400, OPENGL);
  noStroke();
  infoFont = createFont("Arial", 28);
  textFont(infoFont);
}

void displayText(){
  fill(25, 70, 20);
  textFont(infoFont); 
  text( "FPS: " + int(frameRate), 0, 30); 
}

void draw()
{
  background(0);
//  displayText();
  lightSpecular(red, blue, green);
  if(red == 255){
      redinc=-1;
  }
  else if(red == 0){
      redinc=1;
  }
  if(green == 255){
      greeninc=-1;
  }
  else if(green == 0){
      greeninc=1;
  }
  if(blue == 255){
      blueinc=-1;
  }
  else if(blue == 0){
      blueinc=1;
  }
  
  if(shine == 5.0){
      shineinc=-0.2;
  }
  else if(shine == 0){
      shineinc=0.2;
  }
  red+=redinc;
  blue+=blueinc;
  green+=greeninc;
  lightx+=blueinc*3;
  lighty+=redinc*3;
  lightz+=greeninc*3;
  shine+=shineinc;
  pointLight(200, 200, 200, lightx, lighty, lightz);

  specular(204, 102, 0);
  shininess(shine);

  // push matrix to center of the viewport
  pushMatrix();
  translate(width/2, height/2, 150 + zoom);
  
  // draw the sun
  fill(255,0,0);
  sphere(40);
  
  // push on another matrix and rotate and trans
  pushMatrix();
  rotateY(rotEarth += 0.01);
  translate(0, 0, 80);
  
  fill(25, 70, 20);
  
  sphereDetail(int(zoom + 16));
  sphere(25);
  
  pushMatrix();
  rotateZ(rotMoon += 0.08);
  translate(0, 40, 0);
  fill(128, 128, 128);
  sphere(10);

  popMatrix();
  popMatrix();
  popMatrix();
}