I'm using a Java JOGL wrapper called processing.org. I have coded some enviroment on it and I'm quite proud of it even if it has some ready stuffs that I didn't know anything about it (==LIGHTS).
Then, for some geometry, I've decided to use a VBO. I had to pass in the hard way and recode all lights. But I can't achieve the same result.
This is the original light system:
And this with VBO:
With this code:
Vec3D l;
gl.glEnable(GL.GL_LIGHTING);
gl.glEnable(GL.GL_LIGHT0);
gl.glEnable(GL.GL_COLOR_MATERIAL);
gl.glMaterialfv(GL.GL_FRONT_AND_BACK, GL.GL_AMBIENT, new float[]{0.8f,0f,0f}, 0);
l = new Vec3D(0,0,-10);
gl.glColor3f(0.8f,0f,0f);
gl.glLightfv(GL.GL_LIGHT0, GL.GL_POSITION, new float[] { l.x, l.y, l.z, 0 }, 0);
gl.glLightfv(GL.GL_LIGHT0, GL.GL_SPOT_DIRECTION, new float[] { 1, 1, 1, 1 }, 0);
I can't achive the same light, the same color material, and the same wireframe stuffs.
If needed I can also post the code I use for VBO, but it is quite standard vertex array grabbed on the net that uses glDrawArrays
