/// <summary>
/// Initialize physical-engine related stuff and set callbacks to respond to contact start / ended / processed events.
/// </summary>
public static void Initialize()
{
// set collision start callback
BulletSharp.ManifoldPoint.ContactAdded += (
BulletSharp.ManifoldPoint cp,
BulletSharp.CollisionObjectWrapper obj0,
int partId0,
int index0,
BulletSharp.CollisionObjectWrapper obj1,
int partId1,
int index1) =>
{
// get physical bodies
BasicPhysicalBody body0 = obj0.CollisionObject.UserObject as BasicPhysicalBody;
BasicPhysicalBody body1 = obj1.CollisionObject.UserObject as BasicPhysicalBody;
// if one of the bodies don't support collision skip
if (body0 == null || body1 == null)
{
return;
}
// store both bodies for the collision end event
cp.UserPersistentData = new CollisionPersistData(body0, body1);
// send collision events
CollisionData data = new CollisionData(ToMonoGame.Vector(cp.PositionWorldOnA));
body0.CallCollisionStart(body1, ref data);
body1.CallCollisionStart(body0, ref data);
};
// set while-collising callback
BulletSharp.PersistentManifold.ContactProcessed += (
BulletSharp.ManifoldPoint cp,
BulletSharp.CollisionObject body0,
BulletSharp.CollisionObject body1) =>
{
if (cp.UserPersistentData == null)
{
return;
}
CollisionPersistData data = (CollisionPersistData)cp.UserPersistentData;
data.Body0.CallCollisionProcess(data.Body1);
data.Body1.CallCollisionProcess(data.Body0);
};
// set collising-ended callback
BulletSharp.PersistentManifold.ContactDestroyed += (object userPersistantData) =>
{
if (userPersistantData == null)
{
return;
}
CollisionPersistData data = (CollisionPersistData)userPersistantData;
data.Body0.CallCollisionEnd(data.Body1);
data.Body1.CallCollisionEnd(data.Body0);
};
}
/// <summary>
/// Remove a physical body from the world.
/// </summary>
/// <param name="body"></param>
public void RemoveBody(BasicPhysicalBody body)
{
// this might happen after the world was destroyed, hence the _world != null test.
if (_world != null)
{
body.RemoveSelfFromBulletWorld(_world);
}
body._world = null;
}
/// <summary>
/// Update single object's aabb.
/// </summary>
/// <param name="body">Body to update.</param>
public void UpdateSingleAabb(BasicPhysicalBody body)
{
_world.UpdateSingleAabb(body._BulletEntity);
}
/// <summary>
/// Add a physical body to the world
/// </summary>
/// <param name="body">Physics entity to add.</param>
public void AddBody(BasicPhysicalBody body)
{
Utils.CountAndAlert.Count(Utils.CountAndAlert.PredefAlertTypes.AddedOrCreated);
body.AddSelfToBulletWorld(_world);
body._world = this;
}
public CollisionPersistData(BasicPhysicalBody body0, BasicPhysicalBody body1)
{
Body0 = body0;
Body1 = body1;
}
/// <summary>
/// Called while this physical body is colliding with another body.
/// </summary>
/// <param name="other">The other body we are colliding with.</param>
public void CallCollisionProcess(BasicPhysicalBody other)
{
EcsComponent.CallCollisionProcess(other.EcsComponent);
}
/// <summary>
/// Called when this physical body start colliding with another body.
/// </summary>
/// <param name="other">The other body we collide with.</param>
/// <param name="data">Extra collision data.</param>
public void CallCollisionStart(BasicPhysicalBody other, ref CollisionData data)
{
EcsComponent.CallCollisionStart(other.EcsComponent, data);
}
/// <summary>
/// Add a physical body to the world
/// </summary>
/// <param name="body">Physics entity to add.</param>
public void AddBody(BasicPhysicalBody body)
{
body.AddSelfToBulletWorld(_world);
body._world = this;
}