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/*==LICENSE==*
CyanWorlds.com Engine - MMOG client, server and tools
Copyright (C) 2011 Cyan Worlds, Inc.
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/>.
You can contact Cyan Worlds, Inc. by email legal@cyan.com
or by snail mail at:
Cyan Worlds, Inc.
14617 N Newport Hwy
Mead, WA 99021
*==LICENSE==*/
#ifndef plParticleEmitter_inc
#define plParticleEmitter_inc
#include "hsGeometry3.h"
#include "hsBounds.h"
#include "pnNetCommon/plSynchedValue.h"
#include "hsColorRGBA.h"
class hsBounds3Ext;
class plParticleSystem;
class plParticleCore;
class plParticleExt;
class plParticleGenerator;
class plSimpleParticleGenerator;
class hsResMgr;
#include "plEffectTargetInfo.h"
// This just holds a bunch of parameters for an emission location. A particle system can have several of these
class plParticleEmitter : public plCreatable
{
friend plParticleSystem;
friend plSimpleParticleGenerator;
public:
plParticleEmitter();
~plParticleEmitter();
void Init(plParticleSystem *system, UInt32 maxParticles, UInt32 spanIndex, UInt32 miscFlags,
plParticleGenerator *gen = nil);
void Clone(plParticleEmitter* src, UInt32 spanIndex);
plParticleCore *GetParticleArray() const { return fParticleCores; }
UInt32 GetParticleCount() const { return fNumValidParticles; }
UInt32 GetNumTiles() const;
const hsBounds3Ext &GetBoundingBox() const { return fBoundBox; }
UInt32 GetSpanIndex() const { return fSpanIndex; }
const hsMatrix44 &GetLocalToWorld() const;
void AddParticle(hsPoint3 &pos, hsVector3 &velocity, UInt32 tileIndex,
hsScalar hSize, hsScalar vSize, hsScalar scale, hsScalar invMass, hsScalar life,
hsPoint3 &orientation, UInt32 miscFlags, hsScalar radsPerSec=0);
void WipeExistingParticles();
void KillParticles(hsScalar num, hsScalar timeToDie, UInt8 flags);
UInt16 StealParticlesFrom(plParticleEmitter *victim, UInt16 num); // returns the number actually stolen
void TranslateAllParticles(hsPoint3 &amount); // Used to recenter the system when linking between ages.
void UpdateGenerator(UInt32 paramID, hsScalar paramValue);
static UInt32 CreateHexColor(const hsColorRGBA &color);
static UInt32 CreateHexColor(const hsScalar r, const hsScalar g, const hsScalar b, const hsScalar a);
void OverrideLocalToWorld(const hsMatrix44& l2w);
void UnOverrideLocalToWorld() { fMiscFlags &= ~kOverrideLocalToWorld; }
hsBool LocalToWorldOverridden() const { return 0 != (fMiscFlags & kOverrideLocalToWorld); }
void SetTimeToLive(hsScalar dt) { fTimeToLive = dt; }
hsScalar GetTimeToLive() const { return fTimeToLive; } // 0 time to live is never turn off.
CLASSNAME_REGISTER( plParticleEmitter );
GETINTERFACE_ANY( plParticleEmitter, plCreatable);
virtual void Read(hsStream* s, hsResMgr *mgr);
virtual void Write(hsStream* s, hsResMgr *mgr);
enum // Miscellaneous flags
{
kMatIsEmissive = 0x00000001,
kNormalUp = 0x00000010,
kNormalVelUpVel = 0x00000020,
kNormalFromCenter = 0x00000040,
kNormalDynamicMask = kNormalVelUpVel | kNormalFromCenter, // precalc methods that need updating each frame
kNormalPrecalcMask = kNormalDynamicMask | kNormalUp, // All types where emitter precalculates the normal
kNormalViewFacing = 0x00000100,
kNormalNearestLight = 0x00000200,
kNeedsUpdate = 0x01000000,
kBorrowedGenerator = 0x02000000,
kOverrideLocalToWorld = 0x04000000,
kOnReserve = 0x08000000,
kOrientationUp = 0x10000000,
kOrientationVelocityBased = 0x20000000,
kOrientationVelocityStretch = 0x40000000,
kOrientationVelocityFlow = 0x80000000,
kOrientationVelocityMask = kOrientationVelocityBased | kOrientationVelocityStretch | kOrientationVelocityFlow, // Velocity dependent
kOrientationMask = kOrientationUp | kOrientationVelocityMask,
};
UInt32 fMiscFlags;
protected:
plParticleSystem *fSystem; // The particle system this belongs to.
plParticleCore *fParticleCores; // The particle pool, created on init, initialized as needed, and recycled.
plParticleExt *fParticleExts; // Same mapping as the Core pool. Contains extra info the render pipeline
// doesn't need.
plParticleGenerator *fGenerator; // Optional auto generator (have this be nil if you don't want auto-generation)
UInt32 fSpanIndex; // Index of the span that this emitter uses.
UInt32 fNumValidParticles;
UInt32 fMaxParticles;
hsBounds3Ext fBoundBox;
plEffectTargetInfo fTargetInfo; // A collection of pointers and strides that plParticleEffects will manipulate.
hsColorRGBA fColor;
hsMatrix44 fLocalToWorld;
hsScalar fTimeToLive;
void IClear();
void ISetupParticleMem();
void ISetSystem(plParticleSystem *sys) { fSystem = sys; }
hsBool IUpdate(hsScalar delta);
void IUpdateParticles(hsScalar delta);
void IUpdateBoundsAndNormals(hsScalar delta);
void IRemoveParticle(UInt32 index);
};
#endif