Hey,

I am curious how to make compiled dynamic objects with custom vertex controller. I haven't found any example on forum or wiki about it, but documentation says that compile(true) method must be used to be able to modify vertexes and touch() method needs to be called everytime when they are changed.

I have created object in following way:
public Ray()
    {
super(4);

for (int i = 0; i < VERTEXES.length; ++i)
    vertexes[i] = new SimpleVector(VERTEXES[i]);

addTriangle(VERTEXES[HF1], 1, 1, VERTEXES[HT1], 1, 0, VERTEXES[HT2], 0, 0);
addTriangle(VERTEXES[HT2], 0, 0, VERTEXES[HF2], 0, 1, VERTEXES[HF1], 1, 1);
addTriangle(VERTEXES[VF1], 1, 1, VERTEXES[VT1], 1, 0, VERTEXES[VT2], 0, 0);
addTriangle(VERTEXES[VT2], 0, 0, VERTEXES[VF2], 0, 1, VERTEXES[VF1], 1, 1);

setCulling(Object3D.CULLING_DISABLED);
setLighting(Object3D.LIGHTING_NO_LIGHTS);
setTransparency(0);
build();
getMesh().setVertexController(new RayVertexController(),
    IVertexController.PRESERVE_SOURCE_MESH);
compile(true);
    }

and run periodically following method to change its shape:

public void initialize(SimpleVector from, SimpleVector to, double scale, Color color,
    int transparencyMode)
    {
setVertexes(from, to, (float) scale);
setAdditionalColor(color);
setTransparencyMode(transparencyMode);
getMesh().applyVertexController();
touch();
setCenter(SimpleVector.ORIGIN);
setOrigin(SimpleVector.ORIGIN);
getRotationMatrix().setIdentity();
setRotationPivot(SimpleVector.ORIGIN);
    }

Unfortunatelly I do not see any change on screen, ie. object is always displayed at it initial place (ie. first position that was set).

Is there anything more that needs to be set?

Thanks,
Wojtek

But why it works for not billboarded objects? Ie. when I comment out a following line
box.setBillboarding(true); the screen is rendered properly even if I set much bigger scale?

Hello,

I am sorry that I haven't written for so long - I have not had time to look at it and prepare example.
Well the problem with NullPointer seems to be that what you have said in some posts earlier ie. to not share objects between different FrameBuffers:

import java.awt.BorderLayout;
import java.awt.Canvas;
import java.awt.Color;
import java.awt.Graphics;
import javax.swing.JFrame;
import com.threed.jpct.FrameBuffer;
import com.threed.jpct.IRenderer;
import com.threed.jpct.Object3D;
import com.threed.jpct.Primitives;
import com.threed.jpct.SimpleVector;
import com.threed.jpct.World;

public class Test2 extends JFrame implements Runnable
{
    private static final long serialVersionUID = -1203822572518219468L;
    private World world;
    private FrameBuffer buffer;
    private Canvas canvas;
    private boolean initialized = false;
    private FrameBuffer buffer2;
    private Canvas canvas2;
    private World world2;
    private boolean alive = true;

    public static void main(String[] args)
    {
new Test2();
    }

    public Test2()
    {
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
init();
pack();
setVisible(true);
    }

    private static World createWorld()
    {
World w = new World();
w.setAmbientLight(100, 100, 100);
w.getCamera().setPosition(new SimpleVector(200, 0, 0));
w.getCamera().lookAt(SimpleVector.ORIGIN);
return w;
    }

    public void init()
    {
world = createWorld();
world2 = createWorld();

Object3D BLUEPRINT = Primitives.getPyramide(10);
Object3D o1 = BLUEPRINT.cloneObject();
o1.compileAndStrip();
world.addObject(o1);
Object3D o2 = BLUEPRINT.cloneObject();
o2.compileAndStrip();
world2.addObject(o2);

buffer = createBuffer();
buffer2 = createBuffer();

add(canvas = buffer.enableGLCanvasRenderer(), BorderLayout.LINE_START);
add(canvas2 = buffer2.enableGLCanvasRenderer(), BorderLayout.LINE_END);
initialized = true;
new Thread(this).start();
    }

    private static FrameBuffer createBuffer()
    {
FrameBuffer buffer = new FrameBuffer(300, 300,
FrameBuffer.SAMPLINGMODE_GL_AA_4X);
buffer.disableRenderer(IRenderer.RENDERER_SOFTWARE);
return buffer;
    }

    @Override
    public void run()
    {

while (alive)
{
    this.repaint();
    try
    {
Thread.sleep(1000);
    }
    catch (InterruptedException e)
    {
    }
}
alive = false;

    }

    private static void paint(FrameBuffer buffer, World world, Canvas canvas)
    {
buffer.clear(Color.BLACK);
world.renderScene(buffer);
world.draw(buffer);
buffer.update();
buffer.displayGLOnly();
canvas.repaint();
    }

    @Override
    public void paint(Graphics g)
    {
if (!initialized)
    return;
paint(buffer, world, canvas);
paint(buffer2, world2, canvas2);
    }
}

Everything is fine if o2 is added to first world. If it is added to world2, the mentioned exception is thrown.

Thanks,
Wojtek

Additionally, initialization has to happen in the paintGL-method of the renderer, so there's no way to do this beforehand, even if you are already in the EDT. However, it may be sufficient to skip the wait if we are already in the EDT. I've updated the jar in link a few posts ealier with a version that does this (hopefully).

Ok, I understand. In the meantime I have reduced the amount of reinitialization of the FrameBuffers on resize event, so now each canvas is initialzied only once. Additionally I noticed that the problem with waiting was related to the fact, that I was adding a new object to world (and run compile() on it) and reinitializing a FB in the same time (both operations were a result of the same event). Now I ensured that the canvas size is not changed in that time and now it seems to work ok.

Regarding to the link, I am not sure which one I should used - one from main page, or perhaps http://www.jpct.net/download/beta/jpct.jar.

BTW: Are you actually using the same objects multiple times in different views? I don't think that this will work if you are using display lists (what you do, juding from the log), because they are bound to the gl context which should be different in multiple canvas'. Or does it work anyway? I 'm just asking because i never really tried this...and hoped that nobody never will, so that i would never have to care about this case...

Looking at the code again, it might work with multiple contexts, because it tries to revert to normal vertex arrays in that case (which are somewhat slower, but not bound to the context). However, the current version might spam the log in that case. I've modified the jar again to prevent this (if it actually is a problem in your case).

My code is working in that way, that I am loading first all models, run build() and compile() and put them to "factory".
Next I am creating 3 views (with different FB, worlds, canvases etc).
When I want do display some objects, I run following method:
public Object3D createObject()
{
    Object3D result = object.cloneObject(); //it is the model
    result.compile();
    return result;
}
and adding object to specific world.
Is that a wrong concept?

I am not sharing objects between worlds, however I have noticed that sometimes (not all times) I receive exceptions like:
Exception in thread "AWT-EventQueue-0" java.lang.RuntimeException: java.lang.NullPointerException
at com.threed.jpct.AWTJPCTCanvas.paintGL(Unknown Source)
at org.lwjgl.opengl.AWTGLCanvas.paint(AWTGLCanvas.java:288)
at org.lwjgl.opengl.AWTGLCanvas.update(AWTGLCanvas.java:317)
at sun.awt.RepaintArea.updateComponent(Unknown Source)
at sun.awt.RepaintArea.paint(Unknown Source)
at sun.awt.windows.WComponentPeer.handleEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)
Caused by: java.lang.NullPointerException
at com.threed.jpct.CompiledInstance.render(Unknown Source)
at com.threed.jpct.AWTGLRenderer.drawVertexArray(Unknown Source)
... 15 more


I am wondering also how to use shareCompiledData() and compileAndStrip() for my models - I was not able to do that without problems so far so I am not using it yet.

Thanks,
Wojtek

Hello,

I am wondering if it is possible to force full initialization of AWTGLCanvas during construction FrameBuffer in mentioned code.

What happens now is that the game main window is displayed and when I show a JPanel that contains AWTGLCanvas for a first time, game freezes for some time before it shows something. I am using JTabbedPane so the canvases that I am using are not visible from the begining.
Now, I am using compiled objects (at least main ones), and noticed also a bunch of following messages:
Using LWJGL's AWTGLCanvas
Software renderer disposed
Waiting for renderer to initialize...0
Waiting for renderer to initialize...1
Waiting for renderer to initialize...2
[...]
Waiting for renderer to initialize...48
Waiting for renderer to initialize...49
Subobject of object 15129/object15131 compiled using 670 vertices in 1ms!

My question is if it is possible to force full initialization of renderers/canvases and make that before the main window is displayed (lets say in constructor of window or in some method that will be called before setVisible())?
The other question is how to avoid such messages?

Thanks,
Wojtek

Hello,

I would like to ask some questions related to FrameBuffer hardware mode initialization process.

My code for that is
buffer = new FrameBuffer(currentWidth, currentHeight, FrameBuffer.SAMPLINGMODE_GL_AA_4X);
canvas = buffer.enableGLCanvasRenderer();
buffer.disableRenderer(IRenderer.RENDERER_SOFTWARE);
where currentWidth and currentHeight are dimensions of panel where canvas is displayed.

Well, first of all I am getting following errors in logs:
Java version is: 1.6.0_17
-> support for BufferedImage
Version helper for 1.5+ initialized!
-> using BufferedImage
Software renderer (OpenGL mode) initialized
Using LWJGL's AWTGLCanvas
Can't find desired videomode (1232 x 555 x 32) - searching for alternatives
Can't find alternative videomode (1232 x 555 x 32) - trying something else
[ Mon Mar 15 19:58:05 CET 2010 ] - ERROR: Can't find any suitable videomode!
[ Mon Mar 15 19:58:05 CET 2010 ] - ERROR: Can't set videomode - try different settings!
Software renderer disposed
I have read in docs that width and height must match to the one of available VideoModes for hardware mode, however when I ignore it, the game is running fine and the canvas content is displayed correctly - it fills to the panel content.
My question is how it is working in that case and what is the consequence of ignoring those error messages?

The other thing is that I do not see any difference between SAMPLINGMODE_NORMAL, SAMPLINGMODE_GL_AA_2X and SAMPLINGMODE_GL_AA_4X mode. Is there anything else that I have to do to enable it?
The logs about graphics card are:
Driver is: vga/6.0.6001.18000 on NVIDIA Corporation / GeForce 9650M GT/PCI/SSE2
GL_ARB_texture_env_combine supported and used!
FBO supported and used!
OpenGL renderer initialized (using 4 texture stages)

There is an screenshot of my ship, and I am assuming the AA is not working because I see sharp shapes of ship and station:



Thanks,
Wojtek

Yes, you can use the calcMinDistance that you are calling anyway for this. calcMinDistance triggers a CollisionEvent if a CollisionListener is assigned to the object...so just implement a CollisionListener (don't forget to let your requiresPolygonIDs() -impl return true), add it to all objects and you can get object and polygon id from the event.

Hello Egon,

Can you please put the example code how to use World.calcMinDistanceAndObject3D() method instead of Interact2D.pickPolygon() for mouse handler?

I have tried something like this, but it does not seem to work correctly (ie. returns wrong object)
SimpleVector ray = Interact2D.reproject2D3D(camera, buffer, mouseX, mouseY);
Object[] result = getWorld().calcMinDistanceAndObject3D(camera.getPosition(), ray, HORIZON_RADIUS);
return (Object3D) result[1];

Thanks,
Wojtek