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  Why is the viewing port  (Read 1267 times)
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Offline Java Cool Dude

Senior Member




Java forever


« Posted 2003-11-19 23:21:58 »

a bit different in Xith3D than what it feels like in Java3D?
I mean in one of my port, I set the primary TransformGroup 850 into the canvas3D whereas I had to get it 350 unit closer, 500, in Xith3D to achieve a better resemblance.
Java3D  t3D.setTranslation(new Vector3f(0,0,-850));
Xith3D   t3D.setTranslation(new Vector3f(0,0,-500));

...
Offline DavidYazel

Junior Member




Java games rock!


« Reply #1 - Posted 2003-11-20 01:07:50 »

Are you setting the field of view the same in both instances?  We use the standard mesa perspective calculation, so I would not expect differences.

David Yazel
Xith3D Project Founder
http://xith3d.dev.java.net

It may look complicated, but in the end it is just a bunch of triangles
Offline Java Cool Dude

Senior Member




Java forever


« Reply #2 - Posted 2003-11-20 02:09:04 »

Could you please post some code as in:
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    locale.addBranchGraph(branchGroup());
    virtualUniverse.addLocale(locale);
    virtualUniverse.addView(view);

    canvasPeer   = renderPeer.makeCanvas(canvasParent,canvasWidth,canvasHeight,32,false);
    canvasPeer.getComponent().addKeyListener(this);

    canvas.set3DPeer(canvasPeer);
    canvas.requestFocus();
    view.addCanvas3D(canvas);
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Offline DavidYazel

Junior Member




Java games rock!


« Reply #3 - Posted 2003-11-21 00:49:26 »

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        view.setFieldOfView((float) Math.toRadians(28));


I don't know what the default field of view is for Java3D, but you can use this same method in both to make sure it is the same.

David Yazel
Xith3D Project Founder
http://xith3d.dev.java.net

It may look complicated, but in the end it is just a bunch of triangles
Offline Java Cool Dude

Senior Member




Java forever


« Reply #4 - Posted 2003-11-21 05:54:02 »

I figured out Java3D's field of view after many attempts; 22.5.
Therefore to have Java3D's default view in Xith3D, one must include the following line:
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view.setFieldOfView((float) Math.toRadians(22.5)); 


Java3D


Xith3D


PS: Both demos are running the same amount of particles, notice the difference in the frame rate Wink
PS2: the only difference in code is how to load a texture and set up a canvas3D Wink x 2

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