RigidBody2D::RigidBody2D(const RigidBody2D& object) :
m_geom(object.m_geom),
m_userData(object.m_userData),
m_world(object.m_world),
m_isStatic(object.m_isStatic),
m_gravityFactor(object.m_gravityFactor),
m_mass(object.GetMass())
{
NazaraAssert(m_world, "Invalid world");
NazaraAssert(m_geom, "Invalid geometry");
m_handle = Create(m_mass, object.GetMomentOfInertia());
SetGeom(object.GetGeom(), false);
CopyBodyData(object.GetHandle());
for (std::size_t i = 0; i < m_shapes.size(); ++i)
m_shapes[i]->bb = cpShapeCacheBB(object.m_shapes[i]);
}
void RigidBody2D::SetGeom(Collider2DRef geom, bool recomputeMoment)
{
// We have no public way of getting rid of an existing geom without removing the whole body
// So let's save some attributes of the body, destroy it and rebuild it
if (m_geom)
{
cpFloat mass = cpBodyGetMass(m_handle);
cpFloat moment = cpBodyGetMoment(m_handle);
cpBody* newHandle = Create(static_cast<float>(mass), static_cast<float>(moment));
CopyBodyData(m_handle, newHandle);
Destroy();
m_handle = newHandle;
}
if (geom)
m_geom = geom;
else
m_geom = NullCollider2D::New();
m_geom->GenerateShapes(this, &m_shapes);
cpSpace* space = m_world->GetHandle();
for (cpShape* shape : m_shapes)
cpShapeSetUserData(shape, this);
if (m_isSimulationEnabled)
RegisterToSpace();
if (recomputeMoment)
{
if (!IsStatic() && !IsKinematic())
cpBodySetMoment(m_handle, m_geom->ComputeMomentOfInertia(m_mass));
}
}
