Compound collision and collision ID.

[Crashy]

Hi,

I'm looking for a way to retrieve the collision id of a sub-part of a compound collision when the collision occurs. I've only found ways to retrieve the compound collision's id, but not the id of the sub-part involved in the contact. Is there a way to do it?

Thanks.

[Julio Jerez]

In a contact callback or when iteration over the contact joints that link two bodies, you can get the contact material that was use to generate teh contact, teh conta contaion teh subshape and the body for both bodies
NewtonCollision* NewtonMaterialGetBodyCollidingShape (const NewtonMaterial* const material, const NewtonBody* const body);
something like this

Code: Select all

                NewtonBody* const body = NewtonJointGetBody0(contactJoint);
   for (void* contact = NewtonContactJointGetFirstContact (contactJoint); contact; contact = NewtonContactJointGetNextContact (contactJoint, contact)) {
      dFloat speed;
      dVector point;
      dVector normal;   
      dVector dir0;   
      dVector dir1;   
      dVector force;
      NewtonMaterial* material;

      material = NewtonContactGetMaterial (contact);

      NewtonMaterialGetContactForce (material, body, &force.m_x);

                               NewtonCollision* collidingSubShape = NewtonMaterialGetBodyCollidingShape (material, body);


      NewtonMaterialGetContactPositionAndNormal (material, body, &point.m_x, &normal.m_x);
      NewtonMaterialGetContactTangentDirections (material, body, &dir0.m_x, &dir1.m_x);
      speed = NewtonMaterialGetContactNormalSpeed(material);


      //speed = NewtonMaterialGetContactNormalSpeed(material);
      // play sound base of the contact speed.
      //
   }
}

[Crashy]

Thank you, it's working like a charm