// Simulated screen for view control by dragging points
// Written by Jarek Rossignac June 2006. Modified Septmber 2007
import processing.opengl.*;                // load OpenGL
import javax.media.opengl.*; 
import javax.media.opengl.glu.*; 
import java.nio.*;
GL gl; 
GLU glu; 
float a=0;
boolean pickS=false;

// ** SETUP **
void setup() { size(800, 800, OPENGL); setColors(); sphereDetail(12); //smooth();
  PFont font = loadFont("Courier-14.vlw"); textFont(font, 12);  // font for writing labels on screen
  this.addMouseWheelListener(new CMouseWheelEvent());// wheel 
  gl=((PGraphicsOpenGL)g).gl; glu=((PGraphicsOpenGL)g).glu; 
  B.add(new pt(0,0,0),30);
  B.add(new pt(100,0,0),35);
  B.add(new pt(200,0,0),20);
  B.add(new pt(300,0,0),10);
  B.add(new pt(350,50,0),10);
  B.add(new pt(350,100,0),15);
   } 
 
// ** DRAW **
void draw() {
  lights(); directionalLight(0,0,128,0,1,0); directionalLight(0,0,128,0,0,1);  
  background(white); 
  fill(black); text("Click&drag on nodes to change their value.",10,20); noFill();
  fill(black); text("Hold 1, 2, or 3 and drag to change the view. Press 'h' to reset it.",10,40); noFill();
  pushMatrix();
  translate(float(height)/2, float(height)/2, 0.0);     // center view wrt window  
  if (!picked) if (keyPressed&&mousePressed) {changeView();  if (key=='t') {  }; };
  updateView(); 
  noStroke();
    fill(green); S.showBalls();  
   if (!keyPressed&&mousePressed) {
     if (pick) {mark.setTo( fromMouse() ); eye.setTo(fromOrigin()); picked=S.pickBall(mark);  pick=false;} ; 
     if (picked) S.changeRadius();
     else  { viewPar[4][0]+=mouseX-pmouseX; viewPar[4][1]+=mouseY-pmouseY; };
     };
  fill(dgreen); S.showCaplets(12);  
  a+=0.1;
  rotateY(a);
  fill(cyan); B.show();    

  


   popMatrix();
  }

//***      KEY ACTIONS (details in keys tab)
void keyPressed() { keys(); };
void mousePressed() { pick=true; };  
void mouseReleased() {picked=false;};  // reset the view if any key was pressed when mouse was released