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Topics - gamerfan

Pages: 1 [2]
Support / Object translation clarification
« on: July 01, 2011, 04:02:23 pm »
I am further understanding this rotation and camera movement of collisionDemoSoftware.This time I have added the code for moving the cube along Y-axis.And this is the following code I have added.But what happens is that the camera itself is moving up and the cube disappears.
Code: [Select]
if(keyA) {
                    SimpleVector t = cube.getYAxis();
                    moveRes = cube.checkForCollisionEllipsoid(moveRes, ellipsoid, 8);
                     if(moveRes.y < 0) {
                         System.out.println(" less than zer0....");
                         cube.translate(0, 0.25f, 0);
                     else {
I have added the above two lines. But the cube is not moving along y-axis, similarly the way it is moving along z-axis. Instead of that, the camera itself is moving up as I described earlier.What exactly I am missing here?

Support / Object rotation
« on: June 29, 2011, 11:44:23 am »
I was going through the CollisionDemoSoftware and trying to understand how it works.There I noticed one thing that the small cube has been placed on the plane.Here I need to rotate the small cube along X-axis to a certain degree.But when rotated the cube, the entire scene was away from the other objects along with small cube. (In fact, only the small cube is visible). What I want to achieve here is everything should be there as expected but the small cube should be rotated along x axis. This is the code I have used.
Code: [Select]
                cube = Primitives.getCube(2);
cube.translate(-50, -10, -50);
How to handle this? Thanks in advance.

Support / loading .obj file
« on: June 20, 2011, 07:37:56 pm »
I am new to jPCT and am using this framework to develop a sample game.I am trying yo load .obj file under 3ds folder.I have created .obj file from .blender file using its exporter.But when I run the following code I am getting this exception:

Text file 3ds\butterfly.obj loaded...287934 bytes
Processing object from OBJ-file: Cube_Cube.001
Object 'Cube_Cube.001_jPCT0' created using 12 polygons and 8 vertices.
Processing object from OBJ-file: Plane.001_Plane
Object 'Plane.001_Plane_jPCT1' created using 10368 polygons and 5329 vertices.
Processing object from OBJ-file: butterfly_logic
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: -10000
        at com.threed.jpct.Loader.createOBJObject(Unknown Source)
        at com.threed.jpct.Loader.loadOBJ(Unknown Source)
        at com.threed.jpct.Loader.loadOBJ(Unknown Source)
        at jpctdemo.Main.<init>(
        at jpctdemo.Main.main(

Let me paste the code here.This sample I have taken from the forum only.

Code: [Select]
package jpctdemo;

import java.awt.*;
import java.awt.event.*;
import javax.swing.JFrame;
import com.threed.jpct.*;

class Main extends JFrame
   private FrameBuffer _buffer = null;
   private World _world = null;
   private TextureManager _texMgr = null;
   private Camera _camera = null;
   private int _width = 800;
   private int _height = 600;
   private Graphics _graphics = null;
   private int _titleBarHeight = 0;
   private int _leftBorderWidth = 0;
   private Object3D[] _model = null;
   private ClassLoader _classLoader = getClass().getClassLoader();

   public Main()
      super("jPCT " + Config.getVersion());
      Config.glFullscreen = false;
      Config.glMipmap = true;
      Config.glColorDepth = 16;
      Config.maxPolysVisible = 64000;
      Config.fadeoutLight = false;
      _world = new World();
      _world.setAmbientLight(25, 30, 30);
      _world.addLight(new SimpleVector(-1000, -150, 1000), 22, 5, 4);
      _world.addLight(new SimpleVector(1000, -150, -1000), 4, 2, 22);     

      _texMgr = TextureManager.getInstance();
   char c = File.separatorChar;
  _texMgr.addTexture("prop_butterfly_diff", new Texture("textures"+c+"prop_butterfly_diff.png"));
      _texMgr.addTexture("fx_sparkles", new Texture("textures"+c+"fx_sparkles.png"));

//      _texMgr.addTexture("tex", new Texture(_classLoader.getResourceAsStream("model/Mat.jpg")));

      _model = Loader.loadOBJ("3ds"+c+"butterfly.obj", "3ds"+c+"butterfly.mtl", 1f);
      for (int i = 0; i < _model.length; i++)
      _camera = _world.getCamera();
      _camera.setPosition(-12, 90, 0);  // ARGGGHH  how can I center the camera over the stick figure?


      Insets insets = getInsets();
      _titleBarHeight =;
      _leftBorderWidth = insets.left;
      setSize(_width + _leftBorderWidth + insets.right, _height + _titleBarHeight + insets.bottom);
      _graphics = getGraphics();

      addMouseMotionListener(new MouseDragListener());

      _buffer = new FrameBuffer(_width, _height, FrameBuffer.SAMPLINGMODE_NORMAL);

   public static void main(String[] args)
      new Main();

   private void drawWorld()
      _buffer.display(_graphics, _leftBorderWidth, _titleBarHeight);
   private class MouseDragListener implements MouseMotionListener
      final float speed = 0.05f;
      int lastX = 0;
      int lastY = 0;
      public void mouseDragged(MouseEvent me)
         int currentX = me.getX();
         int currentY = me.getY();
         if (currentX > lastX)
            // the mouse is going to the right
         else if (currentX < lastX)
            // the moust is going to the left
         if (currentY > lastY)
            // we are going down on the screen
         else if (currentY < lastY)
            // we are going up on the screen
         lastX = currentX;
         lastY = currentY;

      public void mouseMoved(MouseEvent arg0)

Can you please look into this issue and tell what I am doing wrong here.


Pages: 1 [2]