/* 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/ParticleEmitter.h"
#include "hpl1/engine/graphics/Graphics.h"
#include "hpl1/engine/graphics/MaterialHandler.h"
#include "hpl1/engine/resources/ImageManager.h"
#include "hpl1/engine/resources/MaterialManager.h"
#include "hpl1/engine/resources/Resources.h"
#include "hpl1/engine/system/low_level_system.h"

namespace hpl {

//////////////////////////////////////////////////////////////////////////
// DATA LOADER
//////////////////////////////////////////////////////////////////////////

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

iParticleEmitterData::iParticleEmitterData(const tString &asName, cResources *apResources,
										   cGraphics *apGraphics) {
	msName = asName;
	mpResources = apResources;
	mpGraphics = apGraphics;

	mfWarmUpTime = 0;
	mfWarmUpStepsPerSec = 20;
}

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

iParticleEmitterData::~iParticleEmitterData() {
	for (int i = 0; i < (int)mvMaterials.size(); i++) {
		if (mvMaterials[i])
			mpResources->GetMaterialManager()->Destroy(mvMaterials[i]);
	}
}
//-----------------------------------------------------------------------

void iParticleEmitterData::AddMaterial(iMaterial *apMaterial) {
	mvMaterials.push_back(apMaterial);
}

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

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

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

iParticleEmitter::iParticleEmitter(tMaterialVec *avMaterials,
								   unsigned int alMaxParticles, cVector3f avSize,
								   cGraphics *apGraphics, cResources *apResources) {
	mpGraphics = apGraphics;
	mpResources = apResources;

	mvParticles.resize(alMaxParticles);
	for (int i = 0; i < (int)alMaxParticles; i++) {
		mvParticles[i] = hplNew(cParticle, ());
	}
	mlMaxParticles = alMaxParticles;
	mlNumOfParticles = 0;

	mvMaterials = avMaterials;

	// Update vars:
	mbDying = false;
	mfTime = 0;
	mfFrame = 0;

	mbUpdateGfx = true;
	mbUpdateBV = true;
}

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

iParticleEmitter::~iParticleEmitter() {
	for (int i = 0; i < (int)mvParticles.size(); i++) {
		hplDelete(mvParticles[i]);
	}
}

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

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

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

void iParticleEmitter::Update(float afTimeStep) {
	UpdateMotion(afTimeStep);

	mfTime++;
	mbUpdateGfx = true;
	mbUpdateBV = true;
}

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

void iParticleEmitter::KillInstantly() {
	mlMaxParticles = 0;
	mlNumOfParticles = 0;
	mbDying = true;
}

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

//////////////////////////////////////////////////////////////////////////
// PROTECTED METHODS
//////////////////////////////////////////////////////////////////////////

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

cParticle *iParticleEmitter::CreateParticle() {
	if (mlNumOfParticles == mlMaxParticles)
		return NULL;
	++mlNumOfParticles;
	return mvParticles[mlNumOfParticles - 1];
}

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

void iParticleEmitter::SwapRemove(unsigned int alIndex) {
	if (alIndex < mlNumOfParticles - 1) {
		cParticle *pTemp = mvParticles[alIndex];
		mvParticles[alIndex] = mvParticles[mlNumOfParticles - 1];
		mvParticles[mlNumOfParticles - 1] = pTemp;
	}
	mlNumOfParticles--;
}

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

} // namespace hpl