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/*
* The Mana World
* Copyright 2006 The Mana World Development Team
*
* This file is part of The Mana World.
*
* The Mana World 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
* any later version.
*
* The Mana World 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 The Mana World; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include "particle.h"
#include <cmath>
#include "animationparticle.h"
#include "configuration.h"
#include "imageparticle.h"
#include "log.h"
#include "map.h"
#include "particleemitter.h"
#include "textparticle.h"
#include "resources/resourcemanager.h"
#include "utils/dtor.h"
#include "utils/fastsqrt.h"
#include "utils/xml.h"
class Graphics;
class Image;
int Particle::particleCount = 0;
int Particle::maxCount = 0;
int Particle::fastPhysics = 0;
int Particle::emitterSkip = 1;
const float Particle::PARTICLE_SKY = 800.0f;
Particle::Particle(Map *map) :
mAlive(true),
mPosX(0.0f), mPosY(0.0f), mPosZ(0.0f),
mLifetimeLeft(-1),
mLifetimePast(0),
mFadeOut(0),
mFadeIn(0),
mAutoDelete(true),
mMap(map),
mVectorX(0.0f), mVectorY(0.0f), mVectorZ(0.0f),
mGravity(0.0f),
mRandomnes(0),
mBounce(0.0f),
mTarget(NULL),
mAcceleration(0.0f),
mInvDieDistance(-1.0f),
mMomentum(1.0f)
{
Particle::particleCount++;
if (mMap) setSpriteIterator(mMap->addSprite(this));
}
void
Particle::setupEngine()
{
Particle::maxCount = (int)config.getValue("particleMaxCount", 3000);
Particle::fastPhysics = (int)config.getValue("particleFastPhysics", 0);
Particle::emitterSkip = (int)config.getValue("particleEmitterSkip", 0) + 1;
disableAutoDelete();
logger->log("Particle engine set up");
}
bool
Particle::update()
{
if (!mMap) return false;
if (mLifetimeLeft == 0)
{
mAlive = false;
}
if (mAlive)
{
//update child emitters
if (mLifetimePast%Particle::emitterSkip == 0)
{
for ( EmitterIterator e = mChildEmitters.begin();
e != mChildEmitters.end();
e++
)
{
Particles newParticles = (*e)->createParticles();
for ( ParticleIterator p = newParticles.begin();
p != newParticles.end();
p++
)
{
(*p)->moveBy(mPosX, mPosY, mPosZ);
mChildParticles.push_back (*p);
}
}
}
if (mMomentum != 1.0f)
{
mVectorX *= mMomentum;
mVectorY *= mMomentum;
mVectorZ *= mMomentum;
}
if (mTarget && mAcceleration != 0.0f)
{
float distX = mPosX - mTarget->getPosX();
float distY = mPosY - mTarget->getPosY();
float distZ = mPosZ - mTarget->getPosZ();
float invHypotenuse;
switch(Particle::fastPhysics)
{
case 1:
invHypotenuse = fastInvSqrt(
distX * distX + distY * distY + distZ * distZ);
break;
case 2:
invHypotenuse = 2.0f /
fabs(distX) + fabs(distY) + fabs(distZ);
break;
default:
invHypotenuse = 1.0f / sqrt(
distX * distX + distY * distY + distZ * distZ);
break;
}
if (invHypotenuse)
{
if (mInvDieDistance > 0.0f && invHypotenuse > mInvDieDistance)
{
mAlive = false;
}
float accFactor = invHypotenuse * mAcceleration;
mVectorX -= distX * accFactor;
mVectorY -= distY * accFactor;
mVectorZ -= distZ * accFactor;
}
}
if (mRandomnes > 0)
{
mVectorX += (rand()%mRandomnes - rand()%mRandomnes) / 1000.0f;
mVectorY += (rand()%mRandomnes - rand()%mRandomnes) / 1000.0f;
mVectorZ += (rand()%mRandomnes - rand()%mRandomnes) / 1000.0f;
}
mVectorZ -= mGravity;
// update position
mPosX += mVectorX;
mPosY += mVectorY;
mPosZ += mVectorZ;
//update other stuff
if (mLifetimeLeft > 0)
{
mLifetimeLeft--;
}
mLifetimePast++;
if (mPosZ > PARTICLE_SKY || mPosZ < 0.0f)
{
if (mBounce > 0.0f)
{
mPosZ *= -mBounce;
mVectorX *= mBounce;
mVectorY *= mBounce;
mVectorZ *= -mBounce;
}
else {
mAlive = false;
}
}
}
//update child particles
for ( ParticleIterator p = mChildParticles.begin();
p != mChildParticles.end();
)
{
if ((*p)->update())
{
p++;
}else {
delete (*p);
p = mChildParticles.erase(p);
}
}
if (!mAlive && mChildParticles.empty() && mAutoDelete)
{
return false;
};
return true;
}
void Particle::draw(Graphics *graphics, int offsetX, int offsetY) const
{
}
Particle*
Particle::addEffect (std::string particleEffectFile, int pixelX, int pixelY)
{
Particle *newParticle = NULL;
// XML parser initialisation stuff
int size;
ResourceManager *resman = ResourceManager::getInstance();
char *data = (char*) resman->loadFile(particleEffectFile.c_str(), size);
if (!data) {
logger->log("Warning: Particle engine could not find %s !",
particleEffectFile.c_str());
return NULL;
}
xmlDocPtr doc = xmlParseMemory(data, size);
free(data);
if (!doc) {
logger->log("Warning: Particle engine found syntax error in %s!",
particleEffectFile.c_str());
return NULL;
}
xmlNodePtr rootNode = xmlDocGetRootElement(doc);
if (!rootNode || !xmlStrEqual(rootNode->name, BAD_CAST "effect")) {
logger->log("Warning: %s is not a valid particle effect definition file!",
particleEffectFile.c_str());
return NULL;
}
// parse particles
for_each_xml_child_node(effectChildNode, rootNode)
{
// We're only interested in particles
if (!xmlStrEqual(effectChildNode->name, BAD_CAST "particle"))
continue;
// Determine the exact particle type
xmlNodePtr node;
// Animation
if ((node = XML::findFirstChildByName(
effectChildNode, "animation"))) {
newParticle = new AnimationParticle(mMap, node);
}
// Image
else if ((node = XML::findFirstChildByName(
effectChildNode, "image"))) {
Image *img= resman->getImage((const char*)
node->xmlChildrenNode->content);
newParticle = new ImageParticle(mMap, img);
}
// Other
else {
newParticle = new Particle(mMap);
}
// Read and set the basic properties of the particle
int offsetX = XML::getProperty(effectChildNode, "position-x", 0);
int offsetY = XML::getProperty(effectChildNode, "position-y", 0);
int offsetZ = XML::getProperty(effectChildNode, "position-z", 0);
int particleX = (int)mPosX + pixelX + offsetX;
int particleY = (int)mPosY + pixelY + offsetY;
int particleZ = (int)mPosZ + offsetZ;
int lifetime = XML::getProperty(effectChildNode, "lifetime", -1);
newParticle->setPosition(particleX, particleY, particleZ);
newParticle->setLifetime(lifetime);
// Look for additional emitters for this particle
for_each_xml_child_node(emitterNode, effectChildNode)
{
if (!xmlStrEqual(emitterNode->name, BAD_CAST "emitter"))
continue;
ParticleEmitter *newEmitter;
newEmitter = new ParticleEmitter(emitterNode, newParticle, mMap);
newParticle->addEmitter(newEmitter);
}
mChildParticles.push_back(newParticle);
}
return newParticle;
}
Particle*
Particle::addTextSplashEffect(std::string text, gcn::Font *font,
int colorR, int colorG, int colorB, int x, int y)
{
Particle *newParticle = new TextParticle(mMap, text, font,
colorR, colorG, colorB);
newParticle->setPosition( x,
y,
0
);
newParticle->setVector ( ((rand()%100) - 50) / 200.0f, //X Vector
((rand()%100) - 50) / 200.0f, //Y Vector
((rand()%100) / 200.0f) + 4.0f //Z Vector
);
newParticle->setGravity(0.1f);
newParticle->setBounce(0.5f);
newParticle->setLifetime(200);
newParticle->setFadeOut(100);
mChildParticles.push_back(newParticle);
return newParticle;
}
void
Particle::setMap(Map *map)
{
mMap = map;
if (mMap) setSpriteIterator(mMap->addSprite(this));
// TODO: Create map emitters based on emitter data in map data
}
Particle::~Particle()
{
//remove from map sprite list
if (mMap) mMap->removeSprite(mSpriteIterator);
//delete child emitters and child particles
clear();
Particle::particleCount--;
}
void
Particle::clear()
{
std::for_each(mChildEmitters.begin(), mChildEmitters.end(),
make_dtor(mChildEmitters));
mChildEmitters.clear();
std::for_each(mChildParticles.begin(), mChildParticles.end(),
make_dtor(mChildParticles));
mChildParticles.clear();
}
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