Currently I'm working on a 3D project. This project consists of having sphere attracted to boxes in the x,y and z dimensions. Till now I've managed to create the spheres and boxes and the relevant force. Now I need to create the 3D dimension which must be accessed with the mouse or keyboard. e.g if the up arrow button is pressed you can zoom in or rotate left.

I know that Peasy cam can do the trick quite easily but for this project I'm not allowed to used Peasy cam. I must create my own camera fuctions. I'm supplying the code I'm working on so you can get an idea of what I'm after.


Thanks all

1.  
   import processing.opengl.*;
   
   int width,height;
   float xCube, yCube, zCube;   // x,y and z coordiante of Cube
   float xSph, ySph, zSph;     // x,y and z coordinate of sphere
   float dX,dY,dZ;            // Variables for sphere velocity
   
   Cube c;
   Sphere s;
   
   void setup()
   {
     width=height=800;
     size(width,height,OPENGL);
     c = new Cube();
     s = new Sphere();
     xCube=yCube=zCube=0;   // Initial variables for cube
     ySph=zSph=0;          //  Initial y and z coordinates for sphere
     xSph =40;            //   Initial x coordinates for sphere
     dY=4;               //    Inital velocity of sphere
   }
   
   void draw()
   {
     background(150);
     translate(width/2,height/2);     //Translate coordinate to centre of sketch
     c.drawCube(xCube,yCube,zCube);  // Draw Cube
     s.drawSphere(xSph,ySph,zSph);  //  Draw Sphere
     force();
     movement();
   }
   
   //CALCULATE FOREC OF ATTRACTION
   void force()
   {
     dX+=(xCube-xSph)/100.0;
     dY+=(yCube-ySph)/100.0;
     dZ+=(zCube-zSph)/100.0;
   }
   
   //CALCULATE MOVEMENT OF SPHERE
   void movement()
   {
     xSph+=dX;
     ySph+=dY;
     zSph+=dZ;
   }
   
2. class Cube
   {
     private float x;
     private float y;
     private float z;
    
     //CONSTRUCTOR
     public Cube()
     {
       this.x =x;
       this.y =y;
       this.z =y;
     }
    
     //DRAW CUBE
     public void drawCube(float x, float y, float z)
     {
       pushMatrix();
       translate(x,y,z);
       fill(255,0,0);
       box(15);
       popMatrix();
     }
   }
3. class Sphere
   {
     private float x;
     private float y;
     private float z;
    
     //CONSTRUCTOR
     public Sphere()
     {
       this.x =x;
       this.y =y;
       this.z =z;
     }
    
     //DRAW SPHERES
     public void drawSphere(float x, float y, float z)
     {
       pushMatrix();
       translate(x,y,z);
       fill(0,255,0);
       sphere(15);
       popMatrix();
     }
   }