Adding or removing children from a transform shape

A shape hierarchy is built using a transform shape created using the CID_REDTransformShape. See Creating and destroying shapes. Then, the following code can be used to manipulate the list of children of a shape from the RED::ITransformShape interface:

// Creating a transform shape:
RED::Object* transform = RED::Factory::CreateInstance( CID_REDTransformShape );
if( !transform )

// Accessing the needed interface to manipulate the shape list of children:
RED::ITransformShape* itransform = transform->As< RED::ITransformShape >();

// Add a 'meshA' shape. Here we don't update our scene graph bounding spheres:
RC_TEST( itransform->AddChild( meshA, RED_SHP_DAG_NO_UPDATE, iresmgr->GetState() ) );

// Remove 'meshB' shape, and update the bounding spheres in the shape hierarchy to adapt to changes:
RC_TEST( itransform->RemoveChild( meshB, RED_SHP_DAG_UPDATE, iresmgr->GetState() ) );

Note that for performance reasons, RED::ITransformShape::AddChild does not prevent duplicate insertion of the same child twice or more. A given child should be added once. Adding the same child shape several times is an error that can cause unpredictible engine behaviors.