What are the semantics of glRotate and glTranslate's parameters?

Posted by Zarkopafilis on Game Development See other posts from Game Development or by Zarkopafilis
Published on 2013-11-01T14:55:08Z Indexed on 2013/11/01 16:23 UTC
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Filed under:

opengl

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java

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rotation

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lwjgl

I have been trying to play with OpenGL after watching some tutorials and I don't understand how the glTranslatef and glRotatef functions work. I believe a simple picture would help me.

I understand that glTranslatef changes the position of the "camera" (but does it change the position in wich the shapes are getting drawn)?

However, I don't understand the rotation concept at all. If I do glRotatef(1,0,0,1) it makes my quad spin around. If I just do glRotatef(1,0,0,0) it makes the quad smaller (further away) but if I try to rotate around the X or Y axis, I get a black screen. I don't understand the angle either. Help would be appreciated.

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