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/**
* @file llpartdata.h
* @brief Particle system data packing
*
* $LicenseInfo:firstyear=2003&license=viewergpl$
*
* Copyright (c) 2003-2008, Linden Research, Inc.
*
* Second Life Viewer Source Code
* The source code in this file ("Source Code") is provided by Linden Lab
* to you under the terms of the GNU General Public License, version 2.0
* ("GPL"), unless you have obtained a separate licensing agreement
* ("Other License"), formally executed by you and Linden Lab. Terms of
* the GPL can be found in doc/GPL-license.txt in this distribution, or
* online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
*
* There are special exceptions to the terms and conditions of the GPL as
* it is applied to this Source Code. View the full text of the exception
* in the file doc/FLOSS-exception.txt in this software distribution, or
* online at http://secondlifegrid.net/programs/open_source/licensing/flossexception
*
* By copying, modifying or distributing this software, you acknowledge
* that you have read and understood your obligations described above,
* and agree to abide by those obligations.
*
* ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
* WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
* COMPLETENESS OR PERFORMANCE.
* $/LicenseInfo$
*/
#ifndef LL_LLPARTDATA_H
#define LL_LLPARTDATA_H
#include "lluuid.h"
#include "v3math.h"
#include "v3dmath.h"
#include "v2math.h"
#include "v4color.h"
class LLMessageSystem;
class LLDataPacker;
const S32 PS_CUR_VERSION = 18;
//
// These constants are used by the script code, not by the particle system itself
//
enum LLPSScriptFlags
{
// Flags for the different parameters of individual particles
LLPS_PART_FLAGS,
LLPS_PART_START_COLOR,
LLPS_PART_START_ALPHA,
LLPS_PART_END_COLOR,
LLPS_PART_END_ALPHA,
LLPS_PART_START_SCALE,
LLPS_PART_END_SCALE,
LLPS_PART_MAX_AGE,
// Flags for the different parameters of the particle source
LLPS_SRC_ACCEL,
LLPS_SRC_PATTERN,
LLPS_SRC_INNERANGLE,
LLPS_SRC_OUTERANGLE,
LLPS_SRC_TEXTURE,
LLPS_SRC_BURST_RATE,
LLPS_SRC_BURST_DURATION,
LLPS_SRC_BURST_PART_COUNT,
LLPS_SRC_BURST_RADIUS,
LLPS_SRC_BURST_SPEED_MIN,
LLPS_SRC_BURST_SPEED_MAX,
LLPS_SRC_MAX_AGE,
LLPS_SRC_TARGET_UUID,
LLPS_SRC_OMEGA,
LLPS_SRC_ANGLE_BEGIN,
LLPS_SRC_ANGLE_END
};
class LLPartData
{
public:
LLPartData() :
mFlags(0),
mMaxAge(0.f),
mParameter(0.f)
{
}
BOOL unpack(LLDataPacker &dp);
BOOL pack(LLDataPacker &dp);
LLSD asLLSD() const;
operator LLSD() const {return asLLSD(); }
bool fromLLSD(LLSD& sd);
// Masks for the different particle flags
enum
{
LL_PART_INTERP_COLOR_MASK = 0x01,
LL_PART_INTERP_SCALE_MASK = 0x02,
LL_PART_BOUNCE_MASK = 0x04,
LL_PART_WIND_MASK = 0x08,
LL_PART_FOLLOW_SRC_MASK = 0x10, // Follows source, no rotation following (expensive!)
LL_PART_FOLLOW_VELOCITY_MASK = 0x20, // Particles orient themselves with velocity
LL_PART_TARGET_POS_MASK = 0x40,
LL_PART_TARGET_LINEAR_MASK = 0x80, // Particle uses a direct linear interpolation
LL_PART_EMISSIVE_MASK = 0x100, // Particle is "emissive", instead of being lit
LL_PART_BEAM_MASK = 0x200, // Particle is a "beam" connecting source and target
// Not implemented yet!
//LL_PART_RANDOM_ACCEL_MASK = 0x100, // Particles have random acceleration
//LL_PART_RANDOM_VEL_MASK = 0x200, // Particles have random velocity shifts"
//LL_PART_TRAIL_MASK = 0x400, // Particles have historical "trails"
// Viewer side use only!
LL_PART_DEAD_MASK = 0x80000000,
};
void setFlags(const U32 flags);
void setMaxAge(const F32 max_age);
void setStartScale(const F32 xs, F32 ys);
void setEndScale(const F32 xs, F32 ys);
void setStartColor(const LLVector3 &rgb);
void setEndColor(const LLVector3 &rgb);
void setStartAlpha(const F32 alpha);
void setEndAlpha(const F32 alpha);
friend class LLPartSysData;
friend class LLViewerPartSourceScript;
// These are public because I'm really lazy...
public:
U32 mFlags; // Particle state/interpolators in effect
F32 mMaxAge; // Maximum age of the particle
LLColor4 mStartColor; // Start color
LLColor4 mEndColor; // End color
LLVector2 mStartScale; // Start scale
LLVector2 mEndScale; // End scale
LLVector3 mPosOffset; // Offset from source if using FOLLOW_SOURCE
F32 mParameter; // A single floating point parameter
};
class LLPartSysData
{
public:
LLPartSysData();
BOOL unpack(LLDataPacker &dp);
BOOL pack(LLDataPacker &dp);
BOOL unpackBlock(const S32 block_num);
BOOL packBlock();
static BOOL packNull();
static BOOL isNullPS(const S32 block_num); // Returns FALSE if this is a "NULL" particle system (i.e. no system)
// Different masks for effects on the source
enum
{
LL_PART_SRC_OBJ_REL_MASK = 0x01, // Accel and velocity for particles relative object rotation
LL_PART_USE_NEW_ANGLE = 0x02, // Particles uses new 'correct' angle parameters.
};
// The different patterns for how particles are created
enum
{
LL_PART_SRC_PATTERN_DROP = 0x01,
LL_PART_SRC_PATTERN_EXPLODE = 0x02,
// Not implemented fully yet
LL_PART_SRC_PATTERN_ANGLE = 0x04,
LL_PART_SRC_PATTERN_ANGLE_CONE = 0x08,
LL_PART_SRC_PATTERN_ANGLE_CONE_EMPTY = 0x10,
};
void setBurstSpeedMin(const F32 spd) { mBurstSpeedMin = llclamp(spd, -100.f, 100.f); }
void setBurstSpeedMax(const F32 spd) { mBurstSpeedMax = llclamp(spd, -100.f, 100.f); }
void setBurstRadius(const F32 rad) { mBurstRadius = llclamp(rad, 0.f, 50.f); }
void setPartAccel(const LLVector3 &accel);
void setUseNewAngle() { mFlags |= LL_PART_USE_NEW_ANGLE; }
void unsetUseNewAngle() { mFlags &= ~LL_PART_USE_NEW_ANGLE; }
// Since the actual particle creation rate is
// a combination of multiple parameters, we
// need to clamp it using a separate method instead of an accessor.
void clampSourceParticleRate();
friend std::ostream& operator<<(std::ostream& s, const LLPartSysData &data); // Stream a
public:
// Public because I'm lazy....
//
// There are two kinds of data for the particle system
// 1. Parameters which specify parameters of the source (mSource*)
// 2. Parameters which specify parameters of the particles generated by the source (mPart*)
//
U32 mCRC;
U32 mFlags;
U8 mPattern; // Pattern for particle velocity/output
F32 mInnerAngle; // Inner angle for PATTERN_ANGLE
F32 mOuterAngle; // Outer angle for PATTERN_ANGLE
LLVector3 mAngularVelocity; // Angular velocity for emission axis (for PATTERN_ANGLE)
F32 mBurstRate; // How often to do a burst of particles
U8 mBurstPartCount; // How many particles in a burst
F32 mBurstRadius;
F32 mBurstSpeedMin; // Minimum particle velocity
F32 mBurstSpeedMax; // Maximum particle velocity
F32 mMaxAge; // Maximum lifetime of this particle source
LLUUID mTargetUUID; // Target UUID for the particle system
F32 mStartAge; // Age at which to start the particle system (for an update after the
// particle system has started)
//
// These are actually particle properties, but can be mutated by the source,
// so are stored here instead
//
LLVector3 mPartAccel;
LLUUID mPartImageID;
//
// The "template" partdata where we actually store the non-mutable particle parameters
//
LLPartData mPartData;
protected:
S32 mNumParticles; // Number of particles generated
};
#endif // LL_LLPARTDATA_H
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