summaryrefslogtreecommitdiff
path: root/src/particle.cpp
blob: f88b9c217bcb11198209a3bb40b5e09fc891fdb1 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
/*
 *  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
 *
 *  $Id$
 */

#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,
                              int colorR, int colorG, int colorB,
                              gcn::Font *font, int x, int y)
{
    Particle *newParticle = new TextParticle(mMap, text, colorR, colorG, colorB,
                                             font);
    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();
}