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/* 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 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.
*
*/
/*
* This file is based on WME Lite.
* http://dead-code.org/redir.php?target=wmelite
* Copyright (c) 2011 Jan Nedoma
*/
#include "engines/wintermute/base/particles/part_particle.h"
#include "engines/wintermute/base/particles/part_emitter.h"
#include "engines/wintermute/base/base_sprite.h"
#include "engines/wintermute/base/base_game.h"
#include "engines/wintermute/utils/utils.h"
#include "engines/wintermute/platform_osystem.h"
#include "common/str.h"
namespace WinterMute {
//////////////////////////////////////////////////////////////////////////
PartParticle::PartParticle(BaseGame *inGame) : BaseClass(inGame) {
_pos = Vector2(0.0f, 0.0f);
_posZ = 0.0f;
_velocity = Vector2(0.0f, 0.0f);
_scale = 100.0f;
_sprite = NULL;
_creationTime = 0;
_lifeTime = 0;
_isDead = true;
BasePlatform::setRectEmpty(&_border);
_state = PARTICLE_NORMAL;
_fadeStart = 0;
_fadeTime = 0;
_currentAlpha = 255;
_alpha1 = _alpha2 = 255;
_rotation = 0.0f;
_angVelocity = 0.0f;
_growthRate = 0.0f;
_exponentialGrowth = false;
}
//////////////////////////////////////////////////////////////////////////
PartParticle::~PartParticle(void) {
delete _sprite;
_sprite = NULL;
}
//////////////////////////////////////////////////////////////////////////
bool PartParticle::setSprite(const char *filename) {
if (_sprite && _sprite->getFilename() && scumm_stricmp(filename, _sprite->getFilename()) == 0) {
_sprite->reset();
return STATUS_OK;
}
delete _sprite;
_sprite = NULL;
SystemClassRegistry::getInstance()->_disabled = true;
_sprite = new BaseSprite(_gameRef, _gameRef);
if (_sprite && DID_SUCCEED(_sprite->loadFile(filename))) {
SystemClassRegistry::getInstance()->_disabled = false;
return STATUS_OK;
} else {
delete _sprite;
_sprite = NULL;
SystemClassRegistry::getInstance()->_disabled = false;
return STATUS_FAILED;
}
}
//////////////////////////////////////////////////////////////////////////
bool PartParticle::update(PartEmitter *emitter, uint32 currentTime, uint32 timerDelta) {
if (_state == PARTICLE_FADEIN) {
if (currentTime - _fadeStart >= (uint32)_fadeTime) {
_state = PARTICLE_NORMAL;
_currentAlpha = _alpha1;
} else _currentAlpha = (int)(((float)currentTime - (float)_fadeStart) / (float)_fadeTime * _alpha1);
return STATUS_OK;
} else if (_state == PARTICLE_FADEOUT) {
if (currentTime - _fadeStart >= (uint32)_fadeTime) {
_isDead = true;
return STATUS_OK;
} else _currentAlpha = _fadeStartAlpha - (int)(((float)currentTime - (float)_fadeStart) / (float)_fadeTime * _fadeStartAlpha);
return STATUS_OK;
} else {
// time is up
if (_lifeTime > 0) {
if (currentTime - _creationTime >= (uint32)_lifeTime) {
if (emitter->_fadeOutTime > 0)
fadeOut(currentTime, emitter->_fadeOutTime);
else
_isDead = true;
}
}
// particle hit the border
if (!_isDead && !BasePlatform::isRectEmpty(&_border)) {
Point32 p;
p.x = (int32)_pos.x;
p.y = (int32)_pos.y;
if (!BasePlatform::ptInRect(&_border, p))
fadeOut(currentTime, emitter->_fadeOutTime);
}
if (_state != PARTICLE_NORMAL) return STATUS_OK;
// update alpha
if (_lifeTime > 0) {
int age = (int)(currentTime - _creationTime);
int alphaDelta = (int)(_alpha2 - _alpha1);
_currentAlpha = _alpha1 + (int)(((float)alphaDelta / (float)_lifeTime * (float)age));
}
// update position
float elapsedTime = (float)timerDelta / 1000.f;
for (int i = 0; i < emitter->_forces.getSize(); i++) {
PartForce *force = emitter->_forces[i];
switch (force->_type) {
case PartForce::FORCE_GLOBAL:
_velocity += force->_direction * elapsedTime;
break;
case PartForce::FORCE_POINT: {
Vector2 vecDist = force->_pos - _pos;
float dist = fabs(vecDist.length());
dist = 100.0f / dist;
_velocity += force->_direction * dist * elapsedTime;
}
break;
}
}
_pos += _velocity * elapsedTime;
// update rotation
_rotation += _angVelocity * elapsedTime;
_rotation = BaseUtils::normalizeAngle(_rotation);
// update scale
if (_exponentialGrowth)
_scale += _scale / 100.0f * _growthRate * elapsedTime;
else
_scale += _growthRate * elapsedTime;
if (_scale <= 0.0f)
_isDead = true;
return STATUS_OK;
}
}
//////////////////////////////////////////////////////////////////////////
bool PartParticle::display(PartEmitter *emitter) {
if (!_sprite) return STATUS_FAILED;
if (_isDead) return STATUS_OK;
_sprite->GetCurrentFrame();
return _sprite->display(_pos.x, _pos.y,
NULL,
_scale, _scale,
BYTETORGBA(255, 255, 255, _currentAlpha),
_rotation,
emitter->_blendMode);
}
//////////////////////////////////////////////////////////////////////////
bool PartParticle::fadeIn(uint32 currentTime, int fadeTime) {
_currentAlpha = 0;
_fadeStart = currentTime;
_fadeTime = fadeTime;
_state = PARTICLE_FADEIN;
return STATUS_OK;
}
//////////////////////////////////////////////////////////////////////////
bool PartParticle::fadeOut(uint32 currentTime, int fadeTime) {
//_currentAlpha = 255;
_fadeStartAlpha = _currentAlpha;
_fadeStart = currentTime;
_fadeTime = fadeTime;
_state = PARTICLE_FADEOUT;
return STATUS_OK;
}
//////////////////////////////////////////////////////////////////////////
bool PartParticle::persist(BasePersistenceManager *persistMgr) {
persistMgr->transfer(TMEMBER(_alpha1));
persistMgr->transfer(TMEMBER(_alpha2));
persistMgr->transfer(TMEMBER(_border));
persistMgr->transfer(TMEMBER(_pos));
persistMgr->transfer(TMEMBER(_posZ));
persistMgr->transfer(TMEMBER(_velocity));
persistMgr->transfer(TMEMBER(_scale));
persistMgr->transfer(TMEMBER(_creationTime));
persistMgr->transfer(TMEMBER(_lifeTime));
persistMgr->transfer(TMEMBER(_isDead));
persistMgr->transfer(TMEMBER_INT(_state));
persistMgr->transfer(TMEMBER(_fadeStart));
persistMgr->transfer(TMEMBER(_fadeTime));
persistMgr->transfer(TMEMBER(_currentAlpha));
persistMgr->transfer(TMEMBER(_angVelocity));
persistMgr->transfer(TMEMBER(_rotation));
persistMgr->transfer(TMEMBER(_growthRate));
persistMgr->transfer(TMEMBER(_exponentialGrowth));
persistMgr->transfer(TMEMBER(_fadeStartAlpha));
if (persistMgr->getIsSaving()) {
const char *filename = _sprite->getFilename();
persistMgr->transfer(TMEMBER(filename));
} else {
char *filename;
persistMgr->transfer(TMEMBER(filename));
SystemClassRegistry::getInstance()->_disabled = true;
setSprite(filename);
SystemClassRegistry::getInstance()->_disabled = false;
delete[] filename;
filename = NULL;
}
return STATUS_OK;
}
} // end of namespace WinterMute
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