Game Development Reference
In-Depth Information
private boolean m_Visible = true;
In the Object3d class's constructor, we have to create a new Physics object.
m_Physics = new Physics(iContext);
We then have to add functions that set and test the visibility. The
SetVisibility()
function sets if
the object is visible or not.
void SetVisibility(boolean value) { m_Visible = value; }
The
IsVisible()
function returns true if the object is visible false otherwise.
boolean IsVisible() { return m_Visible; }
We also have to add in the
GetObjectPhysics()
function that allows access to the
m_Physics
object
from outside the class.
Physics GetObjectPhysics() { return m_Physics; }
The
UpdateObjectPhysics()
function calls the
UpdatePhysicsObject()
function with the orientation of
the object to do the actual physics update.
The
UpdateObject3d()
is the main entry point for updating the physics of our object. If the object is
visible, the physics of that object are updated. (See Listing 5-12.)
Listing 5-12. The Physics Update Entry Point in the Object3d Class
void UpdateObjectPhysics()
{
m_Physics.UpdatePhysicsObject(m_Orientation);
}
void UpdateObject3d()
{
if (m_Visible)
{
UpdateObjectPhysics();
}
}
Finally, the
DrawObject()
function draws the object if the object is visible. The additions to this
function from previous examples are shown in bold in Listing 5-13.
Listing 5-13. Drawing an Object If It's Visible
void DrawObject(Camera Cam, PointLight light)
{
if (m_Visible)
{
DrawObject(Cam,
light,
