//===========================================================================//
// File: EntityAttribute.hpp                                                 //
//---------------------------------------------------------------------------//
//   Date    Who  Modification                                               //
// --------  ---  ---------------------------------------------------------- //
// 08/25/97  JMA  Infrastructure changes												  //
// 08/25/97  ECH	Infrastructure changes												  //
//---------------------------------------------------------------------------//
// Copyright (C) 1994-97, Virtual World Entertainment, Inc.                  //
// All Rights reserved worldwide                                             //
// This unpublished sourcecode is PROPRIETARY and CONFIDENTIAL               //
//===========================================================================//

#include "AdeptHeaders.hpp"

#include "EntityAttribute.hpp"

//#############################################################################
//#####################    LocalToWorldAttributeEntry    ######################
//#############################################################################

//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//
LocalToWorldAttributeEntry::LocalToWorldAttributeEntry(
	Entity::AttributeID attribute_ID,
	const char *attribute_name
):
	AttributeEntry(
		attribute_ID,
		attribute_name,
		LinearMatrix4DClassID,
		NULL
	)			
{
}

//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//
LocalToWorldAttributeEntry::~LocalToWorldAttributeEntry()
{
}

//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//
void
	LocalToWorldAttributeEntry::GetValue(
		Entity *entity, 
		void *new_value
	)
{
	Check_Object(entity);
	Check_Pointer(new_value);
	*Cast_Pointer(LinearMatrix4D*, new_value) = entity->GetLocalToWorld();
}

//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//
bool
	LocalToWorldAttributeEntry::GetChangedValue(
		Entity *entity, 
		void *new_value,
		void *current_value,
		Scalar diff_threshold
	)
{
	Check_Object(entity);
	Check_Pointer(new_value);
	Check_Pointer(current_value);

	if (
		!Close_Enough(
			entity->GetLocalToWorld(),
			*Cast_Pointer(LinearMatrix4D*, current_value),
			diff_threshold
		)
	)
	{
		*Cast_Pointer(LinearMatrix4D*, new_value) = 
			entity->GetLocalToWorld();
		return true;
	}
	return false;
}