/// Creates a fixture and attach it to this body. Use this function if you need
/// to set some fixture parameters, like friction. Otherwise you can create the
/// fixture directly from a shape.
/// If the density is non-zero, this function automatically updates the mass of the body.
/// Contacts are not created until the next time step.
/// @param def the fixture definition.
/// @warning This function is locked during callbacks.
public b2Fixture CreateFixture(b2FixtureDef def)
{
Debug.Assert(m_world.IsLocked() == false);
if (m_world.IsLocked() == true)
{
return(null);
}
b2Fixture fixture = new b2Fixture();
fixture.Create(this, def);
if ((m_flags & BodyFlags.e_activeFlag) != 0)
{
b2BroadPhase broadPhase = m_world.m_contactManager.m_broadPhase;
fixture.CreateProxies(broadPhase, m_xf);
}
fixture.m_next = m_fixtureList;
m_fixtureList = fixture;
++m_fixtureCount;
fixture.m_body = this;
// Adjust mass properties if needed.
if (fixture.m_density > 0.0f)
{
ResetMassData();
}
// Let the world know we have a new fixture. This will cause new contacts
// to be created at the beginning of the next time step.
m_world.m_flags |= b2World.WorldFlags.e_newFixture;
return(fixture);
}