Beginning Android 4 Games Development

Vertices in 3D

In Chapter 7, you learned that a vertex has a few attributes:

• Position
• Color (optional)
• Texture coordinates (optional)
• You created a helper class called Vertices, which handles all the dirty details for you. You limited the vertex positions to have only x- and y-coordinates. All you need to do to go 3D is modify the Vertices class so that it supports 3D vertex positions.

Vertices3: Storing 3D Positions

Let's write a new class called Vertices3 to handle 3D vertices based on your original Vertices class. Listing 10–1 shows the code.

Listing 10–1. Vertices3.java, Now with More Coordinates.

package com.badlogic.androidgames.framework.gl; import java.nio.ByteBuffer; import java.nio.ByteOrder; import java.nio.IntBuffer; import java.nio.ShortBuffer; ...