Rajawali Tutorial 24: Using Geometry Data To Position And Rotate Objects

Posted by on May 30, 2012 in 3D, Android, Rajawali • 11 comments

This tutorial has moved to the Rajawali Wiki.



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11 comments

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  1. Trox on Jun 7, 2012, 1:52 pm:

    I’m following Rajawali with great interest, thank you and keep up the good work !

  2. tangra on Jul 17, 2012, 3:17 pm:

    Hey mate, you have a great framework going here! I was wondering if you plan on adding bone animation to it that will be extrapolated from your current parsers(fbx for example)?

    Beside this, great WORK!

  3. Trox on Aug 1, 2012, 3:08 pm:

    Hi again,

    Could you give some information concerning anti-aliasing. The things like :

    gl.glHint(GL10.GL_POLYGON_SMOOTH_HINT, GL10.GL_NICEST);

    never work well because the handset is completely free to ignore it.

    It appears that the best way to do multisampling is by creating an EGL context with multisampling enabled and then pass it setEGLConfigChooser.

    There’s an example here : https://code.google.com/p/gdc2011-android-opengl/source/browse/trunk/src/com/example/gdc11/MultisampleConfigChooser.java

    However it would be nice to have some information how to do it with Rajawali, especially while doing LiveWallpaper. Thanks a lot.

  4. Dennis on Aug 1, 2012, 3:30 pm:

    Hi Trox,
    That’s actually already built into Rajawali. I just need to write up a tutorial ;-)

  5. Trox on Aug 1, 2012, 9:50 pm:

    Great !!! The more I look into Rajawali, the more it appears as the best Graphic library out there :) .

    I’ve made my own live wallpaper in 3D with Rajawali, but I need to set some anti-aliasing because the edges of my 3D objects are a bit (in fact a lot) hard :/… So I look forward this tutorial with impatience ;) .

    Thanks a lot, and once again keep up the good work and congratulation !

  6. Dennis on Aug 2, 2012, 8:19 am:

    Hi Trox,
    It is as simple as setting the mMultisamplingEnabled property to true in your Activity (before super.onCreate():

    @Override
public void onCreate(Bundle savedInstanceState) {
	requestWindowFeature(Window.FEATURE_NO_TITLE);
	getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
				WindowManager.LayoutParams.FLAG_FULLSCREEN);
	mMultisamplingEnabled = true;
	super.onCreate(savedInstanceState);
	...
  7. Trox on Aug 3, 2012, 12:38 pm:

    Hi, thanks for your answer, it looks very simple indeed :) !

    And is it possible to enable multi-sampling in a live wallpaper ? In the case of a live wallpaper there is no activity so where should mMultisamplingEnabled = true be put ?

  8. RAN on Aug 6, 2012, 11:42 pm:

    Is there a way to rotate the object on a pivot which is different from the origin? Or is there a way to change the origin to enable this?

  9. Stefano on Sep 25, 2012, 9:10 am:

    Hi I think this framework is the best I’ve ever seen.
    Is there a simple way to extrude flat objects?
    Yes, I could create already extruded objects and put in my app’s res.
    But if I could extrude them at runtime, I could have a much smaller apk.

  10. Gunnar on Mar 15, 2013, 5:03 pm:

    Hey Dennis,
    I’m new to your great framework. Could you give me a hint on how to manipulate vertices and normals the most efficient way?
    I’d like to animate a plane’s grid geometry by applying some time variant wave functions to do a sailing simulation.
    Thanks!

  11. Armando on Apr 26, 2013, 8:18 pm:

    Hello dennis, i have a question, how can i move the objects using framework, i think that it’s possible but i don’t know how, could you tell me how to rotate the object, please.

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