Hi all,
It's great to see JPCT still active! I was using it back in '08 and glad to see its continued to be updated. So much for the "Java is dead" talk. 

So, I'm doing some wireframe rendering and thought there was a way to get double-sided rendering for a wireframe. That is the wireframe is rendered irrespective of the rotation within the camera's view.

Anyone have suggestions on how to achieve this other than adding triangles twice?

Thanks,
Vance

Hey all,
I am thinking about developing an applet for my church website, and using 3D graphics(jpct) in it. People that access this website, though aren't necessarily gamers, and therefore don't necessarily have high-end graphics equipment. So, has there ever been a "survey" to find out how much graphical power the average web visitor has? Or, maybe is there some site that does this periodically?
I want the applet to look good, but I don't want to put so much in that most people won't be able to run it.
Anybody know where this info may be available?
Thanks
Jman.

Hi everyone,
I haven't been very active in a while, so I hope its ok with everyone with me asking on here. Ok, on to my question.
I am applying to various universities. One of them is DeVry University for the online BS in CIS program. I was wondering, has anyone had any experience with DeVry? I have read some horrible things about DeVry, and some good things, but thought maybe some real programmers may know about it.
Thank-you for any help!
Jman

Hi everyone,

I have been learning how to use shadow mapping in jpct, and I am using the ShadowHelper class to do it. I tried out setting my objects as both casters and receivers so that it would look like things in the real world. Unfortunately, the shadows are very poor quality. Here is a screen shot.


Are you not supposed to set an object as a caster and a receiver? I have the projector moving around in a circle in the world, and the animation of the shadows is smooth, but the shadows are poor.

When I set an object as a receiver or just a caster, the shadows appear smooth.

Thanks
Jman

Hi,
I am trying to take the triangles from a primitive object (cube, sphere, pyramid)
and add them into another object. I can add the triangles from a cube, sphere, pyramid
just fine, but when the object that receives the triangles is rendererd an ArrayOutOfBounds
exception is thrown whenever I had added more than 60 triangles. Here is the code that adds
the triangles.

class MoldIn {
   private Object3De in;
   private Object3D from;
   private PolygonManager man;
   private static int index=0;
   public MoldIn(Object3De into, Object3D source){
      from=source;
      in=into;
   }

   public void mold(){
      System.out.println("-----IN MOLD() "+index+"--------");
      man = from.getPolygonManager();
      int id = man.getMaxPolygonID();
      in.build();
      in.unbuild();
      for(int i = 0; i<id; i++){
         System.out.println("Copy " + k + "|" + i);
         //System.out.println("" + man.getTransformedVertex(place,0) + " " + man.getTransformedVertex(place,1) + " " + man.getTransformedVertex(place,2) + " ");
         in.addTriangle(man.getTransformedVertex(i,0),man.getTransformedVertex(i,1),man.getTransformedVertex(i,2));
      }
      in.build();
      System.out.println("_________DONE WITH MOLD()_______");
   }

}

Object3De is just a class that extends Object3D. Any ideas why I can't
add more than 60 in? Actualy I can add a cube's trian. 7 times to the
object but after I add the 8th the exception is thrown??
Any ideas?

Jman

Here is the exception that is thrown during the rendering.

Exception in thread "Thread-2" java.lang.ArrayIndexOutOfBoundsException: 56
        at com.threed.jpct.Object3D.transformVertices(Unknown Source)
        at com.threed.jpct.World.renderScene(Unknown Source)
        at Controller.renderNow(Controller.java:181)
        at Controller.run(Controller.java:141)
        at java.lang.Thread.run(Unknown Source)

Hi, I was using sphere detection collision in an area of my code, but I decided to change to ray collision. The sphere works ok, but the ray type doesn't get a collision. The objects I used the sphere type are the same I am using for the ray-but it won't work. Here is the area where it is called.

      //tool.checkForCollisionSpherical(newSimpleVector(0,(tool.getTransformedCenter().y*-1)+30,0),100);
int obh = tool.checkForCollision(new SimpleVector(0,2,0),(tool.getTransformedCenter().y*-1));

When I uncomment the spherical and comment the ray, I get a collision, but when I run the code how it is here, I get no collision???
Config.collideOffset is 300. Any ideas?
Jman

How do I get this affect? How the texture appears to move over the bump there.

Could I have a little example, or maybe what class(es) is used for this?
JMan

Hi, I am learning about collision detection. I have looked around for help with it, and I thought this code would make box1 move until it runs into box2 then stop, but the box just keeps moving with no collision. Why?

import java.awt.*;
import javax.swing.*;
import com.threed.jpct.*;
import org.lwjgl.opengl.*;
class CanTest {
   public static void main(String args[])throws Exception{
   Config.farPlane=500000;
   final JPanel top = new JPanel();

   final World w = new World();
   Object3D o = new Object3D(200);
   Object3D box1 = Primitives.getCube(60);
   Object3D box2 = Primitives.getCube(60);
   box1.build();
   box2.build();
   box1.translate(900,0,0);
   box1.translateMesh();
   box1.build();
   box1.addCollisionListener(new Lis());
   box2.addCollisionListener(new Lis());
   box1.setTransparency(0);
   box2.setTransparency(0);
   box1.setCollisionMode(Object3D.COLLISION_CHECK_OTHERS|Object3D.COLLISION_CHECK_SELF);
   box2.setCollisionMode(Object3D.COLLISION_CHECK_OTHERS|Object3D.COLLISION_CHECK_SELF);

   w.addObject(box1);
   w.addObject(box2);

   box1.setAdditionalColor(Color.red);
   box2.setAdditionalColor(Color.blue);

   w.setAmbientLight(200,200,200);
   w.newCamera();
   Camera cam = w.getCamera();
   cam.moveCamera(Camera.CAMERA_MOVEOUT,5000);
   cam.moveCamera(Camera.CAMERA_MOVERIGHT,800);

   final FrameBuffer b = new FrameBuffer(800,600,FrameBuffer.SAMPLINGMODE_NORMAL);
   b.enableRenderer(IRenderer.RENDERER_OPENGL,FrameBuffer.SAMPLINGMODE_NORMAL );
   b.disableRenderer(IRenderer.RENDERER_SOFTWARE);

   box1.enableCollisionListeners();
   box2.enableCollisionListeners();

   int i = 0;
   while(i<5000){
         b.clear();
         w.renderScene(b);
         w.draw(b);
         b.update();
         b.displayGLOnly();
   Thread.sleep(100);
   SimpleVector v = box1.checkForCollisionSpherical(new SimpleVector(-10f,0,0),10f);
   box1.translate(v.x,v.y,v.z);
   System.out.println("" + v.x + " " + v.y + " " + v.z);
   }


   }
}

class Lis implements CollisionListener {
   public void collision(CollisionEvent e){
      System.out.println("OUCH!!!!!!!!!!!!");
   }








   public boolean requiresPolygonIDs(){
      return false;
   }
}

Thanks for any help! I really am stumped.