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  Translating OBJ Models  (Read 1439 times)
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Offline crastyrs

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« Posted 2013-05-01 21:12:12 »

I'm trying to create a chess game with LWJGL. How is it possible to move the pieces if I'm using VBOs and the data is stored in OBJ models? In other words, how do I translate the vertices?
Offline relminator
« Reply #1 - Posted 2013-05-02 11:10:17 »

Store your objects in local space and move by transforming your objects via a matrix transform.
Offline crastyrs

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« Reply #2 - Posted 2013-05-02 19:48:05 »

How do I do this matrix transform with LWJGL? All the tutorials I've read are written in C++ and use a library such as GLM
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Offline gouessej
« Reply #3 - Posted 2013-05-02 20:41:38 »

Call glPushMatrix(), glTranslate() and glPopMatrix(). I advise you to learn OpenGL basics if you want to use any low level Java binding for the OpenGL API.

Offline crastyrs

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« Reply #4 - Posted 2013-05-03 00:17:43 »

I know how to do that, but I'm looking for a method that isn't deprecated.
Offline theagentd

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« Reply #5 - Posted 2013-05-03 16:20:59 »

If, and only if, you're using LWJGL you should consider using the Matrix4f and Vector3f classes to create a transformation matrix, store it into a FloatBuffer using Matrix4f.store() and finally upload it to your shader using glUniformMatrix4(). Or if you're using JOGL, Gouessej is your man.

Myomyomyo.
Offline gouessej
« Reply #6 - Posted 2013-05-03 16:27:09 »

If, and only if, you're using LWJGL you should consider using the Matrix4f and Vector3f classes to create a transformation matrix, store it into a FloatBuffer using Matrix4f.store() and finally upload it to your shader using glUniformMatrix4(). Or if you're using JOGL, Gouessej is your man.
In that case, I should have advised him to use PMVMatrix.

Offline crastyrs

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« Reply #7 - Posted 2013-05-03 20:50:22 »

Thanks! Are there any articles or tutorials on how to do that?
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