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  VertexArray  (Read 1948 times)
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Offline TarmTarm

Senior Newbie




Write once, never run.


« Posted 2003-07-21 22:35:04 »

I'm stuck with VertexArrays, I can't get it to work. Cry Does anyone have a small working example (for jogl)? Tongue
Offline DavidYazel

Junior Member




Java games rock!


« Reply #1 - Posted 2003-07-21 22:58:18 »

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  if (normals != null) {
                gl.glEnableClientState(gl.GL_NORMAL_ARRAY);
                gl.glNormalPointer(gl.GL_FLOAT, 0, normals);
            }

            if (vectors != null) {
                gl.glEnableClientState(gl.GL_VERTEX_ARRAY);
                gl.glVertexPointer(3, gl.GL_FLOAT, 0, vectors);
            }

            if (texCoords2D != null) {
                gl.glEnableClientState(gl.GL_TEXTURE_COORD_ARRAY);
                gl.glTexCoordPointer(2, gl.GL_FLOAT, 0, texCoords2D);
            }

            if (texCoords3D != null) {
                gl.glEnableClientState(gl.GL_TEXTURE_COORD_ARRAY);
                gl.glTexCoordPointer(3, gl.GL_FLOAT, 0, texCoords3D);
            }

            gl.glDrawArrays(mode, 0, numVertices);

David Yazel
Xith3D Project Founder
http://xith3d.dev.java.net

It may look complicated, but in the end it is just a bunch of triangles
Archimedes
Guest
« Reply #2 - Posted 2003-07-22 04:10:43 »

Yes, that's been clear. :-)
Now please show how you define your arrays (?) named normals, vectors, etc.
I didn't manage to use just a float array for example (like in "float vectors[] = new float[dim]").
For static data I use display lists now. :)
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Offline TarmTarm

Senior Newbie




Write once, never run.


« Reply #3 - Posted 2003-07-22 05:33:28 »

I thought this code would paint something to the screen, what did i do wrong?

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ByteBufferbb = ByteBuffer.allocateDirect(9 * 4);
bb.order(ByteOrder.nativeOrder());
FloatBuffer bufPoints = bb.asFloatBuffer();
bufPoints.put(-1f);
bufPoints.put(-1f);
bufPoints.put(1f);
bufPoints.put(1f);
bufPoints.put(-1f);
bufPoints.put(1f);
bufPoints.put(1f);
bufPoints.put(1f);
bufPoints.put(1f);
gl.glEnableClientState(GL.GL_VERTEX_ARRAY);
g.glVertexPointer(3, GL.GL_FLOAT, 0, bufPoints);

gl.glDrawArrays(GL.GL_TRIANGLES, 0, 1);
Offline TarmTarm

Senior Newbie




Write once, never run.


« Reply #4 - Posted 2003-07-22 08:55:14 »

I got it to work when I changed
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gl.glDrawArrays(GL.GL_TRIANGLES, 0, 1);
to
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gl.glDrawArrays(GL.GL_TRIANGLES, 0, 3); 


I'll try to think before I post next time  Grin
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