ParticleParam

Constants in the ParticleParam enum.

All constant groups

At a glance, from the LSL definitions

// Emitter pattern and burstPSYS_SRC_PATTERN, integer pattern  // PSYS_SRC_PATTERN_*PSYS_SRC_BURST_RATE, float burst_sleep  // seconds between bursts; 0.0 is as fast as the viewer canPSYS_SRC_BURST_PART_COUNT, integer burst_particle_countPSYS_SRC_BURST_RADIUS, float radius  // metres from the emitter; ignored with PSYS_PART_FOLLOW_SRC_MASK// Particle appearancePSYS_PART_START_COLOR, vector color_startPSYS_PART_END_COLOR, vector color_end  // needs PSYS_PART_INTERP_COLOR_MASKPSYS_PART_START_ALPHA, float alpha_start  // 0.0 to 1.0PSYS_PART_END_ALPHA, float alpha_end  // needs PSYS_PART_INTERP_COLOR_MASKPSYS_PART_START_SCALE, vector scale_start  // 0.03125 to 4.0 m per axis; z ignoredPSYS_PART_END_SCALE, vector scale_end  // needs PSYS_PART_INTERP_SCALE_MASKPSYS_PART_START_GLOW, float glow_start  // 0.0 to 1.0PSYS_PART_END_GLOW, float glow_endPSYS_SRC_TEXTURE, string texture  // inventory name or UUIDPSYS_PART_BLEND_FUNC_SOURCE, integer bf_source  // PSYS_PART_BF_*; default _SOURCE_ALPHAPSYS_PART_BLEND_FUNC_DEST, integer bf_dest  // PSYS_PART_BF_*; default _ONE_MINUS_SOURCE_ALPHA// MotionPSYS_SRC_BURST_SPEED_MIN, float speed_min  // m/sPSYS_SRC_BURST_SPEED_MAX, float speed_max  // m/sPSYS_SRC_ACCEL, vector acceleration  // m/s², region axes; -100.0 to 100.0 per axisPSYS_SRC_OMEGA, vector omega  // pattern rotation per burst, region axesPSYS_SRC_ANGLE_BEGIN, float angle_begin  // half angle in radians; ANGLE patternsPSYS_SRC_ANGLE_END, float angle_end  // half angle in radians; ANGLE patternsPSYS_SRC_TARGET_KEY, key target  // needs PSYS_PART_TARGET_POS_MASK or _LINEAR_MASKPSYS_SRC_INNERANGLE, float angle_inner  // deprecated: use PSYS_SRC_ANGLE_BEGINPSYS_SRC_OUTERANGLE, float angle_outer  // deprecated: use PSYS_SRC_ANGLE_END// LifetimePSYS_PART_MAX_AGE, float duration_particle  // seconds per particle; at most 30.0PSYS_SRC_MAX_AGE, float duration_system  // seconds the emitter runs; 0.0 is forever// FlagsPSYS_PART_FLAGS, integer flags  // PSYS_PART_*_MASK, combined with |

Constants

Emitter pattern and burst

Constant	Type	Value	Description
PSYS_SRC_PATTERN	integer	9	Integer parameter specifying the generation pattern (PSYS_SRC_PATTERN_*) used to emit particles.
PSYS_SRC_BURST_RATE	integer	13	Float parameter specifying the interval in seconds between particle bursts.
PSYS_SRC_BURST_PART_COUNT	integer	15	Integer parameter specifying the number of particles to release in each burst.
PSYS_SRC_BURST_RADIUS	integer	16	Float parameter specifying the radial distance from the emitter's center at which particles are created.

Particle appearance

Constant	Type	Value	Description
PSYS_PART_START_COLOR	integer	1	Vector parameter <r, g, b> that determines the starting color of the particles.
PSYS_PART_END_COLOR	integer	3	Vector parameter <r, g, b> that determines the ending color of the particles.
PSYS_PART_START_ALPHA	integer	2	Float parameter that determines the starting alpha (transparency) of the particles.
PSYS_PART_END_ALPHA	integer	4	Float parameter that determines the ending alpha (transparency) of the particles.
PSYS_PART_START_SCALE	integer	5	Vector parameter <sx, sy, z> defining the starting size of the particle billboard in meters (z-axis value is ignored).
PSYS_PART_END_SCALE	integer	6	Vector parameter <sx, sy, z> defining the ending size of the particle billboard in meters (z-axis value is ignored).
PSYS_PART_START_GLOW	integer	26	Float parameter that determines the starting glow value of the particles.
PSYS_PART_END_GLOW	integer	27	Float parameter that determines the ending glow value of the particles.
PSYS_SRC_TEXTURE	integer	12	String parameter specifying the inventory name or UUID asset key of the texture used for the particles.
PSYS_PART_BLEND_FUNC_SOURCE	integer	24	Integer parameter defining the source blending function.
PSYS_PART_BLEND_FUNC_DEST	integer	25	Integer parameter defining the destination blending function.

Motion

Constant	Type	Value	Description
PSYS_SRC_BURST_SPEED_MIN	integer	17	Float parameter specifying the minimum initial speed of emitted particles.
PSYS_SRC_BURST_SPEED_MAX	integer	18	Float parameter specifying the maximum initial speed of emitted particles.
PSYS_SRC_ACCEL	integer	8	Vector parameter <x, y, z> specifying the constant acceleration to apply to particles.
PSYS_SRC_OMEGA	integer	21	Vector parameter setting the angular velocity used to rotate the emission axis for ANGLE and ANGLE_CONE patterns.
PSYS_SRC_ANGLE_BEGIN	integer	22	Float parameter specifying the angle in radians where particles will not be created (for ANGLE patterns).
PSYS_SRC_ANGLE_END	integer	23	Float parameter specifying the ending angle in radians to be filled with particles (for ANGLE patterns). If smaller than angle_begin, their roles are swapped.
PSYS_SRC_TARGET_KEY	integer	20	Key (UUID) of the target object that particles travel toward when PSYS_PART_TARGET_POS_MASK or PSYS_PART_TARGET_LINEAR_MASK is enabled.
PSYS_SRC_INNERANGLE	integer	10	Float parameter specifying the inner angle of the arc for ANGLE or ANGLE_CONE patterns. The specified inner area will not contain particles.
PSYS_SRC_OUTERANGLE	integer	11	Float parameter specifying the outer angle of the arc for ANGLE or ANGLE_CONE patterns. The area between the outer and inner angles is filled with particles.

Lifetime

Constant	Type	Value	Description
PSYS_PART_MAX_AGE	integer	7	Float parameter specifying the lifetime (age in seconds) of an individual particle before it dies.
PSYS_SRC_MAX_AGE	integer	19	Float parameter specifying the active duration of the particle system in seconds (0.0 means forever).

Flags

Constant	Type	Value	Description
PSYS_PART_FLAGS	integer	0	Integer bitfield parameter specifying the simulation flags for emitted particles. Multiple flags can be combined using bitwise OR (|).

Used by

• llLinkParticleSystemfunctionCreates or updates a particle system on the linked prim link based on the list of rules. An empty list removes the particle system.
• llParticleSystemfunctionCreates or updates a particle system on the prim containing the script based on rules. An empty list removes the particle system.