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Difference between texture storing methods?

Started by Cakey Feb 19, 2009 at 2:01 PM 1 reply 800+ views

Original Post

Feb 19, 2009 at 2:01 PM

So in Java OpenGL I've noticed there are two ways to have/use a texture. I was wondering what or if there are any differences between the two? Don't worry about the actual semantics of the code just the method 1.


Texture myTex = new Texture();
myTex = TextureIO.TextureIO.newTexture(new File(fileName), false);
//then to use
myTex.bind();
//Draw object routine

Versus 2.


int[] textureId = new int[nbTexture];

gl.glGenTextures( nbTexture, textureId, 0 );

gl.glBindTexture( GL.GL_TEXTURE_2D, textureId[4] );

Currently I am experiancing some problems using the first method, when it comes to replacing a texture(very strange errors). Which makes me wonder if the first method is meant to be dynamic or not? Anyone with any articles, or knowledge would be greatly appreciated, because this is holding me back from doing a lot of things.

Caste

Feb 20, 2009 at 2:35 AM

To use textures in OpenGL, you have to generate IDs for them and call glTexImage2D or gluBuildMipmaps2D with the image data.

The Texture class you're using is probably part of your OpenGL framework (LWJGL or JoGL?), wich encapsulates these OpenGL calls. If you want to make sure that the texture works as expected, do the texture generation yourself → choose the 2nd option [wink].

Cakey

Author

Cakey

Feb 20, 2009 at 12:24 PM

Jogl is what I am using. See that's what I was wondering, Damn tutorials teaching me impractical things. Thank you caste!

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