NewtonMaterialSetCollisionCallback problem

[TreantBG]

i use NewtonMaterialSetCollisionCallback to check if my missile is collide with a building, and if it does then explode the missile.
but the problem is the Callback function tells me that the missile collide with the purple rectangle around the building...




but when i remove the callback function my missile collide properly with the building but the problem is i don't know when to tell the missile to explode
any solution to the problem?

[Sweenie]

Sounds like you only defined a callback for the NewtonOnAABBOverlap event.

Code: Select all

void NewtonMaterialSetCollisionCallback (const NewtonWorld* newtonWorld, int id0, int id1, void* userData,
   NewtonOnAABBOverlap aabbOverlap, NewtonContactsProcess process);

Try using the NewtonContactsProcess event instead which is called when the missile is actually hitting the collider.
NewtonOnAABBOverlap is triggered when the missile is entering the bounding box of the body as you described.
You can pass NULL for NewtonOnAABBOverlap, but if you want NewtonOnAABBOverlap to be called as well, don't forget to return 1 in that function or else
Newton won't generate any collision contacts between the two bodies(NewtonContactsProcess won't be called).

[TreantBG]

ok but in NewtonContactsProcess how to take the body0 and body1??

[Sweenie]

The NewtonContactsProcess will pass a NewtonJoint parameter called contact.
Use NewtonJointGetBody0(contact) and NewtonJointGetBody1(contact) to retrieve the associated bodies;

[TreantBG]

im using the old Newton 1.53 and that functions doesn't exits there
any suggestions?

or should i upgrade the version?
Are the newest versions more optimized?

[Stucuk]

You should upgrade. Version 1.53 is very old. Newer versions are faster, more stable and have more features.