///User can override this material combiner by implementing gContactAddedCallback and setting body0->m_collisionFlags |= btCollisionObject::customMaterialCallback;
private float CalculateCombinedFriction(CollisionObject body0, CollisionObject body1)
{
float friction = body0.GetFriction() * body1.GetFriction();
const float MAX_FRICTION = 10f;
if (friction < -MAX_FRICTION)
{
friction = -MAX_FRICTION;
}
if (friction > MAX_FRICTION)
{
friction = MAX_FRICTION;
}
return(friction);
}
public bool Callback(ref ManifoldPoint cp, CollisionObject colObj0, int partId0, int index0, CollisionObject colObj1, int partId1, int index1)
{
bool enable = true;
if (enable)
{
InternalEdgeUtility.AdjustInternalEdgeContacts(cp,colObj1,colObj0, partId1,index1,BulletXNA.BulletCollision.CollisionDispatch.InternalEdgeUtility.InternalEdgeAdjustFlags.BT_TRIANGLE_CONVEX_BACKFACE_NONE);
//btAdjustInternalEdgeContacts(cp,colObj1,colObj0, partId1,index1, BT_TRIANGLE_CONVEX_BACKFACE_MODE);
//btAdjustInternalEdgeContacts(cp,colObj1,colObj0, partId1,index1, BT_TRIANGLE_CONVEX_DOUBLE_SIDED+BT_TRIANGLE_CONCAVE_DOUBLE_SIDED);
}
float friction0 = colObj0.GetFriction();
float friction1 = colObj1.GetFriction();
float restitution0 = colObj0.GetRestitution();
float restitution1 = colObj1.GetRestitution();
if ((colObj0.GetCollisionFlags() & CollisionFlags.CF_CUSTOM_MATERIAL_CALLBACK) != 0)
{
friction0 = 1.0f;//partId0,index0
restitution0 = 0.0f;
}
if ((colObj1.GetCollisionFlags() & CollisionFlags.CF_CUSTOM_MATERIAL_CALLBACK) != 0)
{
if ((index1&1) != 0)
{
friction1 = 1.0f;//partId1,index1
}
else
{
friction1 = 0.0f;
}
restitution1 = 0.0f;
}
cp.m_combinedFriction = CalculateCombinedFriction(friction0,friction1);
cp.m_combinedRestitution = CalculateCombinedRestitution(restitution0,restitution1);
//this return value is currently ignored, but to be on the safe side: return false if you don't calculate friction
return true;
}
///User can override this material combiner by implementing gContactAddedCallback and setting body0->m_collisionFlags |= btCollisionObject::customMaterialCallback;
private float CalculateCombinedFriction(CollisionObject body0, CollisionObject body1)
{
float friction = body0.GetFriction() * body1.GetFriction();
const float MAX_FRICTION = 10f;
if (friction < -MAX_FRICTION)
friction = -MAX_FRICTION;
if (friction > MAX_FRICTION)
friction = MAX_FRICTION;
return friction;
}
public bool Callback(ref ManifoldPoint cp, CollisionObject colObj0, int partId0, int index0, CollisionObject colObj1, int partId1, int index1)
{
float friction0 = colObj0.GetFriction();
float friction1 = colObj1.GetFriction();
float restitution0 = colObj0.GetRestitution();
float restitution1 = colObj1.GetRestitution();
if ((colObj0.GetCollisionFlags() & CollisionFlags.CF_CUSTOM_MATERIAL_CALLBACK) != 0)
{
friction0 = 1.0f;//partId0,index0
restitution0 = 0.0f;
}
if ((colObj1.GetCollisionFlags() & CollisionFlags.CF_CUSTOM_MATERIAL_CALLBACK) != 0)
{
if ((index1&1) != 0)
{
friction1 = 1.0f;//partId1,index1
}
else
{
friction1 = 0f;
}
restitution1 = 0f;
}
cp.m_combinedFriction = CalculateCombinedFriction(friction0,friction1);
cp.m_combinedRestitution = calculateCombinedRestitution(restitution0,restitution1);
//this return value is currently ignored, but to be on the safe side: return false if you don't calculate friction
return true;
}
