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Wheels EventManager
Posted: Thu Oct 07, 2010 11:11 am
by Pedro
Hi, i got some difficulties with the Wheels.
Ok i have a vehicle and i want to know when each wheel have a collision with the ground or not.
Iam using the
WheelShape.Detector property.
Code: Select all
for (var k = 0; k < 4; k++)
{
Vehicle.Wheels[k].Shape.Detector.Tag = string.Format("Wheel_{0}", k);
Vehicle.Wheels[k].Shape.Detector.EventManager.InitialCollisionDetected += HandleCollision;
Vehicle.Wheels[k].Shape.Detector.EventManager.CollisionEnded += HandleEndCollision;
}
But this code doesn't work
Thanks for helping...; and sorry for my bad English
Re: Wheels EventManager
Posted: Thu Oct 07, 2010 6:49 pm
by Norbo
The Detector does not create contacts with anything, so it will never actually fire contact-related events like InitialCollisionDetected or CollisionEnded. It will, however, fire CollisionPair related events.
CollisionPair events won't tell you exactly when the ray hits something, but rather when the Detector's AABB overlaps with other entities' AABB's.
You can also check the Vehicle's support entities each frame through each Wheel's SupportingEntity property.
Re: Wheels EventManager
Posted: Thu Oct 07, 2010 7:57 pm
by Pedro
Thanks. i will test the SupportingEntity
Re: Wheels EventManager
Posted: Thu Oct 07, 2010 8:11 pm
by Pedro
oops, when i try to use the SupportingEntity in the update method, i get "Object reference not set to an instance of an object."
wheel.SupportingEntity = null
the code is in the update method
Code: Select all
foreach (var wheel in Vehicle.Wheels)
{
wheel.SupportingEntity.EventManager.InitialCollisionDetected += HandleCollision;
wheel.SupportingEntity.EventManager.CollisionEnded += HandleEndCollision;
}
Re: Wheels EventManager
Posted: Thu Oct 07, 2010 8:26 pm
by Pedro
Oh, i fixe it.
Its just test if the supportingEntity is null or not "Collision or not"
Thanks Norbo, you are a life saver.