/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * 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 3 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, see <http://www.gnu.org/licenses/>.
 *
 */

/*
 * Copyright (C) 2006-2010 - Frictional Games
 *
 * This file is part of HPL1 Engine.
 */

#include "hpl1/engine/graphics/Renderable.h"

#include "hpl1/engine/graphics/RenderList.h"
#include "hpl1/engine/math/Frustum.h"
#include "hpl1/engine/math/Math.h"
#include "hpl1/engine/system/low_level_system.h"

namespace hpl {

//////////////////////////////////////////////////////////////////////////
// CONSTRUCTORS
//////////////////////////////////////////////////////////////////////////

//-----------------------------------------------------------------------

iRenderable::iRenderable(const tString &asName) : iEntity3D(asName) {
	mbRendered = true;
	mlLastMatrixCount = -1;

	mbStatic = false;

	mlRenderCount = -1;
	mlPrevRenderCount = -1;

	mlCalcScaleMatrixCount = -1;
	mvCalcScale = cVector3f(1, 1, 1);

	mbForceShadow = false;

	mbIsOneSided = false;
	mvOneSidedNormal = 0;
}

//-----------------------------------------------------------------------

//////////////////////////////////////////////////////////////////////////
// PUBLIC METHODS
//////////////////////////////////////////////////////////////////////////

//-----------------------------------------------------------------------

cMatrixf *iRenderable::GetInvModelMatrix() {
	cMatrixf *pModelMatrix = GetModelMatrix(NULL);
	if (pModelMatrix == NULL)
		return NULL;

	if (mlLastMatrixCount != GetMatrixUpdateCount()) {
		mlLastMatrixCount = GetMatrixUpdateCount();

		m_mtxInvModel = cMath::MatrixInverse(*pModelMatrix);
	}

	return &m_mtxInvModel;
}

//-----------------------------------------------------------------------

const cVector3f &iRenderable::GetCalcScale() {
	cMatrixf *pModelMatrix = GetModelMatrix(NULL);

	if (pModelMatrix != NULL && mlCalcScaleMatrixCount != GetMatrixUpdateCount()) {
		mlCalcScaleMatrixCount = GetMatrixUpdateCount();
		mvCalcScale.x = pModelMatrix->GetRight().Length();
		mvCalcScale.y = pModelMatrix->GetUp().Length();
		mvCalcScale.z = pModelMatrix->GetForward().Length();
	}

	return mvCalcScale;
}

//-----------------------------------------------------------------------

bool iRenderable::CollidesWithBV(cBoundingVolume *apBV) {
	return cMath::CheckCollisionBV(*GetBoundingVolume(), *apBV);
}

//-----------------------------------------------------------------------

bool iRenderable::CollidesWithFrustum(cFrustum *apFrustum) {
	return apFrustum->CollideBoundingVolume(GetBoundingVolume()) != eFrustumCollision_Outside;
}

//-----------------------------------------------------------------------

//////////////////////////////////////////////////////////////////////////
// SAVE OBJECT STUFF
//////////////////////////////////////////////////////////////////////////

//-----------------------------------------------------------------------

kBeginSerializeVirtual(cSaveData_iRenderable, cSaveData_iEntity3D)
	kSerializeVar(mbStatic, eSerializeType_Bool)
		kSerializeVar(mbRendered, eSerializeType_Bool)
			kSerializeVar(mfZ, eSerializeType_Float32)
				kEndSerialize()

	//-----------------------------------------------------------------------

	iSaveData *iRenderable::CreateSaveData() {
	return NULL;
}

//-----------------------------------------------------------------------

void iRenderable::SaveToSaveData(iSaveData *apSaveData) {
	kSaveData_SaveToBegin(iRenderable);

	kSaveData_SaveTo(mbStatic);
	kSaveData_SaveTo(mbRendered);
	kSaveData_SaveTo(mfZ);
}

//-----------------------------------------------------------------------

void iRenderable::LoadFromSaveData(iSaveData *apSaveData) {
	kSaveData_LoadFromBegin(iRenderable);

	kSaveData_LoadFrom(mbStatic);
	kSaveData_LoadFrom(mbRendered);
	kSaveData_LoadFrom(mfZ);
}

//-----------------------------------------------------------------------

void iRenderable::SaveDataSetup(cSaveObjectHandler *apSaveObjectHandler, cGame *apGame) {
	kSaveData_SetupBegin(iRenderable);
}

//-----------------------------------------------------------------------
} // namespace hpl