Ok, my end goal of what I’m currently trying to do is load in a mesh from file, storing the vertex data and texture coord data into arrays, and then render this mesh to the screen. After I create the arrays, I create buffers for those arrays, and then I’d like to render them using glDrawArrays().
I’ve tried a couple different ways of rendering besides glDrawArrays() just to make sure that the data is actually populated correctly, which it does (you can see these commented out in the code dump). I’m not doing anything silly like using GL_FLOAT for stride or anything like that, but for some reason the mesh just doesn’t show up when I use glDrawArrays().
anyway, here’s the code dump: http://www.pastie.org/2829501
(or if you prefer here:
// unrelated code not shown:
public class Shapes
{
private final static float[] triVerts = new float[] {
0.0f, 1.0f, 0.0f,
-1.0f, -1.0f, 1.0f,
1.0f, -1.0f, 1.0f,
0.0f, 1.0f, 0.0f,
1.0f, -1.0f, 1.0f,
1.0f, -1.0f, -1.0f,
0.0f, 1.0f, 0.0f,
1.0f, -1.0f, -1.0f,
-1.0f, -1.0f, -1.0f,
0.0f, 1.0f, 0.0f,
-1.0f, -1.0f, -1.0f,
-1.0f, -1.0f, 1.0f
};
private final static float[] triTexCoord = new float[] {
0f, 1f,
1f, 1f,
0f, 1f,
0f, 0f,
0f, 1f,
1f, 1f,
0f, 1f,
0f, 0f,
0f, 1f,
1f, 1f,
0f, 1f,
0f, 0f
};
private final static FloatBuffer triVertBuffer = BufferUtil.toDirect(FloatBuffer.wrap(triVerts));
private final static FloatBuffer triTexCoordBuffer = BufferUtil.toDirect(FloatBuffer.wrap(triTexCoord));
public static void drawPyramidArrays(final float x, final float y, final float z)
{
glPushMatrix();
glTranslatef(x,y,z);
//* // this doesn't work
glEnableClientState(GL_VERTEX_ARRAY);
glEnableClientState(GL_TEXTURE_COORD_ARRAY);
glVertexPointer(3, 0, triVertBuffer);
glTexCoordPointer(2, 0, triTexCoordBuffer);
glDrawArrays(GL_TRIANGLES, 0, triVerts.length / 3);
glDisableClientState(GL_VERTEX_ARRAY);
glDisableClientState(GL_TEXTURE_COORD_ARRAY);
// */
/* // this works
glBegin(GL_TRIANGLES);
for(int i = 0; i < triVerts.length / 3; i++)
{
glTexCoord2f(triTexCoord[i*2], triTexCoord[i*2+1]);
glVertex3f(triVerts[i*3], triVerts[i*3+1], triVerts[i*3+2]);
}
glEnd();
// */
/* // this also works
glBegin(GL_TRIANGLES);
for(int i = 0; i < triVerts.length / 3; i++)
{
glTexCoord2f(triTexCoordBuffer.get(), triTexCoordBuffer.get());
glVertex3f(triVertBuffer.get(), triVertBuffer.get(), triVertBuffer.get());
}
triTexCoordBuffer.flip();
triVertBuffer.flip();
glEnd();
// */
glPopMatrix();
}
}
// and then in my rendering code I'm doing:
public void onRender()
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); // Clear The Screen And The Depth Buffer
glLoadIdentity(); // Reset The View
camera.use();
glColor3f(1f,1f,1f);
// TODO render meshes
glEnable(GL_TEXTURE_2D);
testpacker.bindTexture();
this.test[0].render(-2f, 0f, 3f); // this renders fine using a method similar to the ones I've commented out in the Shapes code.
glBegin(GL_QUADS);
glTexCoord2f(this.tex_sdot.getLeft(), this.tex_sdot.getTop()); glVertex3f(-1f, 0f, -1f);
glTexCoord2f(this.tex_sdot.getRight(), this.tex_sdot.getTop()); glVertex3f(1f, 0f, -1f);
glTexCoord2f(this.tex_sdot.getRight(), this.tex_sdot.getBottom()); glVertex3f(1f, 0f, 1f);
glTexCoord2f(this.tex_sdot.getLeft(), this.tex_sdot.getBottom()); glVertex3f(-1f, 0f, 1f);
glEnd();
Shapes.drawPyramidArrays(-1.5f, 0f, 1.6f); // nothing shows up
TexturePacker.bindNoTextures();
glDisable(GL_TEXTURE_2D);
glScalef(100f, 10f, 100f);
Shapes.drawCube(0f, 0.5f, 0f, 0f); // this shows up fine
}
your help is greatly appreciated! 
