Comments on: Android 3D game tutorial – Part VI

By: Ole

Ole — Mon, 30 Jan 2012 14:40:25 +0000

Thanks Martin, I think it is, for this tutorial. I’m new to Android, and here is weeks of studies.
And thanks to “yokese” for making things easy accesible.

By: yokese

yokese — Wed, 21 Dec 2011 14:24:14 +0000

Thanks for the introduction course. I’ve made a Eclipse project with all the six parts accesible from a options menu in a single application, with all the code sepparated in six VortexView/VortexRenderer different classes too. Enjoy it:

http://www.fileserve.com/file/wAYFeaZ/Vortex.zip

By: Yashraj

Yashraj — Wed, 07 Dec 2011 17:35:26 +0000

Hey Martin awesome tutorial for beginners..Please post some example code with cocos2d and andengine….

By: tartuffe

tartuffe — Sat, 03 Dec 2011 02:12:57 +0000

no offense, but it’s not a 3D GAME tutorial. Where is the sound ? the animation, menu system, state engine? a game is way more than that. having said that, Now,it’s a nice 3D tutorial for beginners

By: Darky

Darky — Sat, 29 Oct 2011 15:29:26 +0000

Thanks a lot for this amazing code tutorial – it helped me a lot!

By: ch_mac

ch_mac — Fri, 21 Oct 2011 16:07:43 +0000

Hello, your tutorial is amazing!

But have you meet something on OpenGL 3D ?

On OnDrawframe() will cause many of GC (Logcat can look this) and some time it cause game lag and latency.

I am try to resolve that issue, but seems like to use NDK.

By: jan

jan — Sun, 16 Oct 2011 15:13:56 +0000

Ged, thank you for the fix!

By: Ged

Ged — Wed, 12 Oct 2011 15:06:56 +0000

In response to this coment:
Hello Martin, great tutorial!
I’ve tried to draw a pyramid with a square base, but the last face in my indices
array is never drawed. Can you help me? Below there is my code…

I have the same problem, and I fix it with this, in this line:
gl.glDrawElements(GL10.GL_TRIANGLES, _nrOfVertices, GL10.GL_UNSIGNED_SHORT,
_indexBuffer);

the _nrOfVertices is lower than the count of vertices you need to draw, but if you look it carefully, I think the indices.lenth is exactly what you need. So change the
_nrOfVertices = coords.length; TO THIS _nrOfVertices = indices.length;

By: malte baden

malte baden — Mon, 26 Sep 2011 22:35:19 +0000

Great tutorials! When will the next part be released?

By: jan

jan — Mon, 26 Sep 2011 10:10:30 +0000

Hello Martin, great tutorial!
I’ve tried to draw a pyramid with a square base, but the last face in my indices array is never drawed. Can you help me? Below there is my code…

        float[] coords = {
                -0.5f, -0.5f, -0.5f,   // 0
        	0.5f, -0.5f, -0.5f,    // 1
                0.5f, -0.5f, 0.5f,     // 2
                -0.5f, -0.5f, 0.5f,    // 3
                0f, 0.5f, 0f           // 4
        };
        _nrOfVertices = coords.length;
 
        float[] colors = {
                1f, 0f, 0f, 1f, // red
                0f, 1f, 0f, 1f, // green
                0f, 0f, 1f, 1f, // blue
                1f, 1f, 1f, 1f, // white
                1f, 1f, 0f, 1f  // yellow
        };
 
        short[] indices = new short[] {
        		0, 3, 2, 0, 2, 1, // base
        		0, 1, 4,
        		1, 2, 4, 
        		2, 3, 4,
        		0, 4, 3
        };

Thank you!