KFbxXMatrix FilmboxNode::GetGeometricTransform() const
{
KFbxXMatrix value;
value.SetIdentity();
if( m_node )
{
KFbxVector4 translation = m_node->GeometricTranslation.Get();
KFbxVector4 rotation = m_node->GeometricRotation.Get();
KFbxVector4 scale = m_node->GeometricScaling.Get();
value.SetS( scale );
value.SetR( rotation );
value.SetT( translation );
}
return value;
}
KFbxXMatrix FilmboxNode::GetParentWorldTransform( int frame ) const
{
KFbxXMatrix value;
value.SetIdentity();
if( m_node )
{
KFbxNode* fbx_parent_node = m_node->GetParent();
if( fbx_parent_node )
{
MCE::FBX::FilmboxNode mce_parent_node( fbx_parent_node );
value = mce_parent_node.GetWorldTransform( frame );
}
}
return value;
}
KFbxXMatrix FilmboxNode::GetWorldTransform( int frame ) const
{
KFbxXMatrix value;
value.SetIdentity();
if( m_node )
{
KFbxScene* scene = m_node->GetScene();
KFbxAnimEvaluator* evaluator = scene->GetEvaluator();
KTime frame_time;
if( frame == 0xFFFFFFFF )
{
frame_time = KTIME_INFINITE;
}
else
{
frame_time.SetTime( 0, 0, 0, frame );
}
value = evaluator->GetNodeGlobalTransform( m_node, frame_time );
if( m_type == MCE::FBX::SceneObjectType::CAMERA )
{
KFbxNode* fbx_target_node = m_node->GetTarget();
if( fbx_target_node )
{
// For target cameras we need to manually replace the rotation to point towards the target
KFbxVector4 camera_position = value.GetT();
MCE::FBX::FilmboxNode mce_target_node( fbx_target_node );
KFbxXMatrix target_transform = mce_target_node.GetWorldTransform( frame );
KFbxVector4 target_position = target_transform.GetT();
KFbxVector4 up_vector( 0.0, 1.0, 0.0, 0.0 );
KFbxVector4 look_axis = -( target_position - camera_position );
look_axis.Normalize();
KFbxVector4 right_axis = up_vector.CrossProduct( look_axis );
KFbxVector4 up_axis = look_axis.CrossProduct( right_axis );
KFbxMatrix rotation_matrix;
rotation_matrix.SetRow( 0, right_axis );
rotation_matrix.SetRow( 1, up_axis );
rotation_matrix.SetRow( 2, look_axis );
rotation_matrix.SetRow( 3, KFbxVector4( 0.0, 0.0, 0.0, 1.0 ) );
KFbxQuaternion camera_rotation;
double determinant;
rotation_matrix.GetElements( KFbxVector4(), camera_rotation, KFbxVector4(), KFbxVector4(), determinant );
KFbxVector4 camera_scale( 1.0, 1.0, 1.0, 0.0 );
value.SetTQS( camera_position, camera_rotation, camera_scale );
}
else
{
// Even though the SDK docs say that GetNodeGlobalTransform takes all transforms into account
// For cameras it appears that you have to manually apply post-rotation
KFbxVector4 post_rotation = m_node->GetPostRotation( KFbxNode::eSOURCE_SET );
KFbxXMatrix fbx_to_mce_camera;
fbx_to_mce_camera.SetR( post_rotation );
value *= fbx_to_mce_camera;
}
}
}
return value;
}
