import java.awt.*;
import graphics.*;

public class hw7 extends ThreeDApplet
{
  Sphere unitSphere;
  Sphere s;

  int[] color = {255, 255, 255};

  //place to save light direction b4 transform
  Vector3 lightdir;

  public void initialize() {
    super.initialize();

    lights = new Light[4];

    lights[0] = new Light(0, 0, 1);
    lights[0].color[0] = lights[0].color[1] = lights[0].color[2] = 255;

    lights[1] = new Light(1, 0, 0); //pointing right
    lights[1].color[0] = lights[1].color[1] = lights[1].color[2] = 255;

    lights[2] = new Light(-1, 0, 0); //pointing left
    lights[2].color[0] = lights[2].color[1] = lights[2].color[2] = 255;

    lights[3] = new Light(0, 1, 0); //pointing down
    lights[3].color[0] = lights[3].color[1] = lights[3].color[2] = 255;

    ambient[0] = ambient[1] = ambient[2] = 30;

    //save original light direction for later
    lightdir = new Vector3(lights[0].getDirection());

    unitSphere = new Sphere(50, 50);
    //unitSphere.uStart = 0.5;
    //unitSphere.vStart = 0.25;
    unitSphere.calculate();
  }

  void draw()
  {
    //outlineShape(s, color);
    //drawNormals(s, color, 0.25);

    drawShape(s);
  }

  void animate(long time)
  {
    double theta;

    //restore original light direction
    lights[0].setDirection(lightdir);

    s = (Sphere)unitSphere.clone();
    s.setDiffuse(0, 0, 120);
    //s.setSpecular(30, 120, 120, 120);
    s.setSpecular(8, 0, 0, 120);


    //lighting transformations
    push();
      theta = 0.001*time;
      rotateY(theta);

      double[] newDir = new double[3];

      transform(lights[0].getDirection(), newDir);

      //normalize and set light vector to result
      Vector3 v = new Vector3(newDir);
      //v.normalize();
      lights[0].setDirection(v);
    pop();

    push(); //scene
      //move everything out
      translate(0,0,-15);

      push();
        theta = 0.0005 * time;
        //rotateY(theta);
        rotateX(theta/2);

        rotateX(Math.PI/4);
        scale(2, 2, 2);
        transform(s);
      pop();

    pop(); //scene
  }
}