You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
 
 
 
 
 

185 lines
7.2 KiB

/*==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 plParticleSystem_inc
#define plParticleSystem_inc
#include "hsTemplates.h"
#include "hsGeometry3.h"
#include "pnModifier/plModifier.h"
#include "pnNetCommon/plSynchedValue.h"
#include "hsColorRGBA.h"
#include "hsMatrix44.h"
#include "plEffectTargetInfo.h"
class plPipeline;
class plParticle;
class plParticleGenerator;
class plSimpleParticleGenerator;
class plParticleEmitter;
class plParticleEffect;
class plParticleSDLMod;
class plController;
class hsGMaterial;
class plDrawableSpans;
class plDrawInterface;
class Mtl;
// This is responsible for creating and maintaining (allocation and update cycle) a related set of particles.
// Automatic particle generation is handled by the plParticleEmitters (one for each spawning location).
class plParticleSystem : public plModifier
{
friend plParticleEmitter;
friend plSimpleParticleGenerator;
protected:
static const hsScalar GRAVITY_ACCEL_FEET_PER_SEC2;
plSceneObject *fTarget;
hsGMaterial *fTexture; // One texture per system (Tiling is your friend!)
UInt32 fXTiles, fYTiles; // Width/height of the texture (in tiles) for determining a particle's UVs
double fCurrTime;
double fLastTime;
hsVector3 fAccel;
hsScalar fPreSim;
hsScalar fDrag;
hsScalar fWindMult;
bool fAttachedToAvatar;
UInt32 fMaxTotalParticles;
UInt32 fMaxTotalParticlesLeft;
UInt32 fNumValidEmitters;
UInt32 fMaxEmitters;
UInt32 fNextEmitterToGo;
plParticleEmitter **fEmitters; // Various locations we're emitting particles from (the first one is
// reserved for particles added explicitly (to keep all the bookkeeping
// in the hands of plParticleEmitter).
hsTArray<plParticleEffect *> fForces; // Global forces (wind/gravity/etc) that affect accelleration.
hsTArray<plParticleEffect *> fEffects; // Any other non-constraint effects.
hsTArray<plParticleEffect *> fConstraints; // Rigid body, collision, connectivity, etc.
plParticleContext fContext; // Rendering context passed to forces/effects/constraints.
hsTArray<plKey> fPermaLights; // Runtime lights assigned to this system. Currently don't support projected lights on particles.
// Material related animations, mapped over the course of a particle's life
plController *fAmbientCtl;
plController *fDiffuseCtl;
plController *fOpacityCtl;
plController *fWidthCtl;
plController *fHeightCtl;
plParticleSDLMod *fParticleSDLMod;
hsBool IShouldUpdate(plPipeline* pipe) const;
virtual hsBool IEval(double secs, hsScalar del, UInt32 dirty); // required by plModifier
void IHandleRenderMsg(plPipeline* pipe);
plDrawInterface* ICheckDrawInterface();
void IAddEffect(plParticleEffect *effect, UInt32 type);
void IReadEffectsArray(hsTArray<plParticleEffect *> &effects, UInt32 type, hsStream *s, hsResMgr *mgr);
void IPreSim();
public:
plParticleSystem();
virtual ~plParticleSystem();
void Init(UInt32 xTiles, UInt32 yTiles, UInt32 maxTotalParticles, UInt32 numEmitters,
plController *ambientCtl, plController *diffuseCtl, plController *opacityCtl,
plController *widthCtl, plController *heightCtl);
enum effectType
{
kEffectForce = 0x1,
kEffectMisc = 0x2,
kEffectConstraint = 0x4,
};
enum miscFlags
{
kParticleSystemAlwaysUpdate = 0x1
};
UInt8 fMiscFlags; // Not read/written (could be, but it's not needed yet.)
// There might not be enough particles available. this function returns the number of maxParticles that
// the emitter actually received.
UInt32 AddEmitter(UInt32 maxParticles, plParticleGenerator *gen, UInt32 emitterFlags);
plParticleEmitter* GetAvailEmitter();
CLASSNAME_REGISTER( plParticleSystem );
GETINTERFACE_ANY( plParticleSystem, plModifier);
// These are just public wrappers to the equivalent plParticleEmitter functions, provided for the purpose
// of adding particles to a system explicitly.
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.f);
void GenerateParticles(UInt32 num, hsScalar dt = 0.f);
void WipeExistingParticles(); // Instant nuke
void KillParticles(hsScalar num, hsScalar timeToDie, UInt8 flags); // Sets a death timer. They'll get removed on the next update (if time has run out)
UInt16 StealParticlesFrom(plParticleSystem *victim, UInt16 num); // Returns the number of particles actually stolen
void TranslateAllParticles(hsPoint3 &amount); // Used to recenter the system when linking between ages.
void DisableGenerators();
UInt32 GetNumTiles() const { return fXTiles * fYTiles; }
void SetTileIndex(plParticle &particle, UInt32 index); // Sets the UV coordinates appropriate for the current texture
UInt32 GetNumValidParticles(hsBool immortalOnly = false) const; // Takes a bit longer if we want a count of immortal particles...
UInt32 GetMaxTotalParticles() const { return fMaxTotalParticles; }
const hsMatrix44 &GetLocalToWorld() const;
void SetAccel(const hsVector3& a) { fAccel = GRAVITY_ACCEL_FEET_PER_SEC2 * a; }
void SetGravity(hsScalar pct) { fAccel.Set(0, 0, -GRAVITY_ACCEL_FEET_PER_SEC2 * pct); }
void SetDrag(hsScalar d) { fDrag = -d; }
void SetWindMult(hsScalar m) { fWindMult = m; }
void SetPreSim(hsScalar time) { fPreSim = time; }
void UpdateGenerator(UInt32 paramID, hsScalar value);
plParticleGenerator *GetExportedGenerator() const;
const hsVector3& GetAccel() const { return fAccel; }
hsScalar GetDrag() const { return fDrag; }
hsScalar GetWindMult() const { return fWindMult; }
plParticleEffect *GetEffect(UInt16 type) const;
plParticleSDLMod* GetSDLMod() {return fParticleSDLMod;}
// Functions related to/required by plModifier
virtual int GetNumTargets() const { return fTarget ? 1 : 0; }
virtual plSceneObject* GetTarget(int w) const { hsAssert(w < 1, "Bad target"); return fTarget; }
virtual void AddTarget(plSceneObject* so);
virtual void RemoveTarget(plSceneObject* so);
virtual void Read(hsStream* s, hsResMgr* mgr);
virtual void Write(hsStream* s, hsResMgr* mgr);
virtual hsBool MsgReceive(plMessage* msg);
void SetAttachedToAvatar(bool attached);
// Export only functions for building the system. Not supported at runtime.
// AddLight allows the particle system to remain in ignorant bliss about runtime lights
void AddLight(plKey liKey);
};
#endif