diff options
Diffstat (limited to 'engines/wintermute/Base/PartParticle.cpp')
| -rw-r--r-- | engines/wintermute/Base/PartParticle.cpp | 255 |
1 files changed, 255 insertions, 0 deletions
diff --git a/engines/wintermute/Base/PartParticle.cpp b/engines/wintermute/Base/PartParticle.cpp new file mode 100644 index 0000000000..5a17706ca6 --- /dev/null +++ b/engines/wintermute/Base/PartParticle.cpp @@ -0,0 +1,255 @@ +/* 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/dcgf.h"
+#include "engines/wintermute/Base/PartParticle.h"
+#include "engines/wintermute/Base/PartEmitter.h"
+#include "engines/wintermute/Base/BSprite.h"
+#include "engines/wintermute/Base/BGame.h"
+#include "engines/wintermute/utils.h"
+#include "engines/wintermute/PlatformSDL.h"
+#include "common/str.h"
+#include <math.h>
+
+namespace WinterMute {
+
+//////////////////////////////////////////////////////////////////////////
+CPartParticle::CPartParticle(CBGame *inGame) : CBBase(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;
+ CBPlatform::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;
+}
+
+
+//////////////////////////////////////////////////////////////////////////
+CPartParticle::~CPartParticle(void) {
+ delete _sprite;
+ _sprite = NULL;
+}
+
+//////////////////////////////////////////////////////////////////////////
+HRESULT CPartParticle::SetSprite(const char *Filename) {
+ if (_sprite && _sprite->_filename && scumm_stricmp(Filename, _sprite->_filename) == 0) {
+ _sprite->Reset();
+ return S_OK;
+ }
+
+ delete _sprite;
+ _sprite = NULL;
+
+ CSysClassRegistry::GetInstance()->_disabled = true;
+ _sprite = new CBSprite(Game, Game);
+ if (_sprite && SUCCEEDED(_sprite->LoadFile(Filename))) {
+ CSysClassRegistry::GetInstance()->_disabled = false;
+ return S_OK;
+ } else {
+ delete _sprite;
+ _sprite = NULL;
+ CSysClassRegistry::GetInstance()->_disabled = false;
+ return E_FAIL;
+ }
+
+}
+
+//////////////////////////////////////////////////////////////////////////
+HRESULT CPartParticle::Update(CPartEmitter *Emitter, uint32 CurrentTime, uint32 TimerDelta) {
+ if (_state == PARTICLE_FADEIN) {
+ if (CurrentTime - _fadeStart >= _fadeTime) {
+ _state = PARTICLE_NORMAL;
+ _currentAlpha = _alpha1;
+ } else _currentAlpha = ((float)CurrentTime - (float)_fadeStart) / (float)_fadeTime * _alpha1;
+
+ return S_OK;
+ } else if (_state == PARTICLE_FADEOUT) {
+ if (CurrentTime - _fadeStart >= _fadeTime) {
+ _isDead = true;
+ return S_OK;
+ } else _currentAlpha = _fadeStartAlpha - ((float)CurrentTime - (float)_fadeStart) / (float)_fadeTime * _fadeStartAlpha;
+
+ return S_OK;
+ } else {
+ // time is up
+ if (_lifeTime > 0) {
+ if (CurrentTime - _creationTime >= _lifeTime) {
+ if (Emitter->_fadeOutTime > 0)
+ FadeOut(CurrentTime, Emitter->_fadeOutTime);
+ else
+ _isDead = true;
+ }
+ }
+
+ // particle hit the border
+ if (!_isDead && !CBPlatform::IsRectEmpty(&_border)) {
+ POINT p;
+ p.x = _pos.x;
+ p.y = _pos.y;
+ if (!CBPlatform::PtInRect(&_border, p)) FadeOut(CurrentTime, Emitter->_fadeOutTime);
+ }
+ if (_state != PARTICLE_NORMAL) return S_OK;
+
+ // update alpha
+ if (_lifeTime > 0) {
+ int Age = CurrentTime - _creationTime;
+ int AlphaDelta = _alpha2 - _alpha1;
+
+ _currentAlpha = _alpha1 + ((float)AlphaDelta / (float)_lifeTime * (float)Age);
+ }
+
+ // update position
+ float ElapsedTime = (float)TimerDelta / 1000.f;
+
+ for (int i = 0; i < Emitter->_forces.GetSize(); i++) {
+ CPartForce *Force = Emitter->_forces[i];
+ switch (Force->_type) {
+ case CPartForce::FORCE_GLOBAL:
+ _velocity += Force->_direction * ElapsedTime;
+ break;
+
+ case CPartForce::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 = CBUtils::NormalizeAngle(_rotation);
+
+ // update scale
+ if (_exponentialGrowth)
+ _scale += _scale / 100.0f * _growthRate * ElapsedTime;
+ else
+ _scale += _growthRate * ElapsedTime;
+
+ if (_scale <= 0.0f) _isDead = true;
+
+
+ return S_OK;
+ }
+}
+
+//////////////////////////////////////////////////////////////////////////
+HRESULT CPartParticle::Display(CPartEmitter *Emitter) {
+ if (!_sprite) return E_FAIL;
+ if (_isDead) return S_OK;
+
+ _sprite->GetCurrentFrame();
+ return _sprite->Display(_pos.x, _pos.y,
+ NULL,
+ _scale, _scale,
+ DRGBA(255, 255, 255, _currentAlpha),
+ _rotation,
+ Emitter->_blendMode);
+}
+
+
+//////////////////////////////////////////////////////////////////////////
+HRESULT CPartParticle::FadeIn(uint32 CurrentTime, int FadeTime) {
+ _currentAlpha = 0;
+ _fadeStart = CurrentTime;
+ _fadeTime = FadeTime;
+ _state = PARTICLE_FADEIN;
+
+ return S_OK;
+}
+
+//////////////////////////////////////////////////////////////////////////
+HRESULT CPartParticle::FadeOut(uint32 CurrentTime, int FadeTime) {
+ //_currentAlpha = 255;
+ _fadeStartAlpha = _currentAlpha;
+ _fadeStart = CurrentTime;
+ _fadeTime = FadeTime;
+ _state = PARTICLE_FADEOUT;
+
+ return S_OK;
+}
+
+//////////////////////////////////////////////////////////////////////////
+HRESULT CPartParticle::Persist(CBPersistMgr *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->_saving) {
+ PersistMgr->Transfer(TMEMBER(_sprite->_filename));
+ } else {
+ char *Filename;
+ PersistMgr->Transfer(TMEMBER(Filename));
+ CSysClassRegistry::GetInstance()->_disabled = true;
+ SetSprite(Filename);
+ CSysClassRegistry::GetInstance()->_disabled = false;
+ delete[] Filename;
+ Filename = NULL;
+ }
+
+ return S_OK;
+}
+
+} // end of namespace WinterMute
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