Game Development Reference
In-Depth Information
public class Cube {
public Cube() {
int one = 0x10000;
// 8 vertices each with 3 xyz coordinates
int vertices[] = { -one, -one, -one
, one, -one, -one
, one, one, -one
, -one, one, -one
, -one, -one, one
, one, -one, one
, one, one, one
, -one, one, one };
// 8 colors each with 4 RGBA values
int colors[] = { 0, 0, 0, one
, one, 0, 0, one
, one, one, 0, one
, 0, one, 0, one
, 0, 0, one, one
, one, 0, one, one
, one, one, one, one
, 0, one, one, one};
// 12 indices each with 3 xyz coordinates
byte indices[] = { 0, 4, 5, 0, 5, 1, 1, 5, 6, 1, 6, 2, 2, 6, 7,
2, 7, 3, 3, 7, 4, 3, 4, 0, 4, 7, 6, 4, 6, 5, 3, 0, 1,
3, 1, 2 };
ByteBuffer vbb = ByteBuffer.allocateDirect(vertices.length * 4);
vbb.order(ByteOrder.nativeOrder());
mVertexBuffer = vbb.asIntBuffer();
mVertexBuffer.put(vertices);
mVertexBuffer.position(0);
ByteBuffer cbb = ByteBuffer.allocateDirect(colors.length * 4);
cbb.order(ByteOrder.nativeOrder());
mColorBuffer = cbb.asIntBuffer();
mColorBuffer.put(colors);
mColorBuffer.position(0);
mIndexBuffer = ByteBuffer.allocateDirect(indices.length);
mIndexBuffer.put(indices);
mIndexBuffer.position(0);
}
public void draw(GL10 gl) {
gl.glFrontFace(GL10.GL_CW);
gl.glVertexPointer(3, GL10.GL_FIXED, 0, mVertexBuffer);
gl.glColorPointer(4, GL10.GL_FIXED, 0, mColorBuffer);
gl.glDrawElements(GL10.GL_TRIANGLES, 36, GL10.GL_UNSIGNED_BYTE,
mIndexBuffer);
}
