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OpenGL question... (Read 1311 times)
bituman
OpenGL question...
Jun 9th, 2005, 10:52am  
ahoi.. a few questions :)

1:
beginShape(QUAD);
texture(someTexture);
vertex(x,y,z);
...
endShape();

simply wont put the desired texture on my poly in OPENGL.

2:
To get access to the GL object, you can use the following:
GL gl = ((PGraphicsGL)g).gl;
// see http://processing.org/faq/bugs.html#opengl
even though its not recommended, i'd like to play around with openGL in processing.

when trying the above code, i get the error message:
Type "GL" was not found.

3:
with accessing GL object, can i access all opengl functions?
and can i write jogl code in processing with the declared gl object?

thanks for your replies in advance..
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v3ga
Re: OpenGL question...
Reply #1 - Jun 9th, 2005, 11:40am  
Hello,

2 : add this line in your program
Code:

import net.java.games.jogl.*;


3 : once you get the reference on the GL instance, you have access to its methods like this :
Code:

gl.glClearColor(0.0f,0.0f,0.0f,1.0f);
gl.glClear(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT);
...

Notice that opengl constants are static members of the GL class.
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Koenie
Re: OpenGL question...
Reply #2 - Jun 9th, 2005, 12:20pm  
About the first question:
The texture doesn't show up because you have to set the coordinates on the texture too, like vertex(x,y,z, u,v);
Take a good look at the reference: http://www.processing.org/reference/vertex_.html

Koenie
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bituman
Re: OpenGL question...
Reply #3 - Jun 9th, 2005, 12:31pm  
thanks Cheesy
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