/******************************************************************************
	libx42.net - skinned vertex animation library (.NET API)
	Copyright (C) 2007 HermitWorks Entertainment Corporation

	This program is free software; you can redistribute it and/or modify it
	under the terms of the GNU General Public License as published by the Free
	Software Foundation; either version 2 of the License, or (at your option)
	any later version.

	This program is distributed in the hope that it will be useful, but
	WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
	or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
	for more details.

	You should have received a copy of the GNU General Public License along
	with this program; if not, write to the
	
		Free Software Foundation, Inc.
		51 Franklin Street, Fifth Floor
		Boston, MA  02110-1301, USA.
******************************************************************************/

#include "Stdafx.h"
#include "IndexCollection.h"

#include "Model.h"
#include "Group.h"

namespace Libx42
{

IndexCollection::IndexCollection( Model ^owner )
	: owner( owner )
{
	baseIndex = 0;
	count = owner->m->header.numIndices;
}

IndexCollection::IndexCollection( Model ^owner, Group ^group )
	: owner( owner )
{
	baseIndex = group->RawGroup.firstIndex != X42_NO_INDICES ?
		group->RawGroup.firstIndex : -1;
	count = group->RawGroup.numElems;
}

int IndexCollection::Offset::get( void )
{
	if( IsImplicit )
		throw gcnew InvalidOperationException;

	return baseIndex;
}

x42index_t IndexCollection::default::get( int index )
{
	if( index < 0 || index >= Count )
		throw gcnew ArgumentOutOfRangeException( "index" );

	if( IsImplicit )
		return (x42index_t)index;

	return owner->m->indices[baseIndex + index];
}

array< x42index_t >^ IndexCollection::ToArray( void )
{
	array< x42index_t > ^ret = gcnew array< x42index_t >( Count );

	if( IsImplicit )
	{
		for( int i = 0; i < ret->Length; i++ )
			ret[i] = (x42index_t)i;
	}
	else
	{
		pin_ptr< x42index_t > pinRet = &ret[0];
		memcpy( pinRet, owner->m->indices + baseIndex, ret->Length * sizeof( x42index_t ) );
	}

	return ret;	
}

};