A nice little particle engine with an on/off switch and timer!
//////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////
//// eltee Statosky's Particle Creation Engine 1.0
//// 01/09/2004
//// *PUBLIC DOMAIN*
//// Free to use
//// Free to copy
//// Free to poke at
//// Free to hide in stuff you sell
//// Just please leave this header intact
//////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////
integer effectFlags=0;
integer running=TRUE;
///////////////////////////////////////////////////////
// Color Secelection Variables
///////////////////////////////////////////////////////
// Interpolate between startColor and endColor
integer colorInterpolation = TRUE;
// Starting color for each particle
vector startColor = <1.0, 0.5, 0.75>;
// Ending color for each particle
vector endColor = <0.75, 0.5, 1.0>;
// Starting Transparency for each particle (1.0 is solid)
float startAlpha = 1.0;
// Ending Transparency for each particle (0.0 is invisible)
float endAlpha = 0.0;
// Enables Absolute color (true) ambient lighting (false)
integer glowEffect = TRUE;
///////////////////////////////////////////////////////
// Size & Shape Selection Variables
///////////////////////////////////////////////////////
// Interpolate between startSize and endSize
integer sizeInterpolation = TRUE;
// Starting size of each particle
vector startSize = <0.5, 0.5, 0.0>;
// Ending size of each particle
vector endSize = <0.5, 0.5, 0.0>;
// Turns particles to face their movement direction
integer followVelocity = TRUE;
// Texture the particles will use ("" for default)
string texture = "";
///////////////////////////////////////////////////////
// Timing & Creation Variables Variables
///////////////////////////////////////////////////////
// Lifetime of one particle (seconds)
float particleLife = 3.0;
// Lifetime of the system 0.0 for no time out (seconds)
float SystemLife = 0.0;
// Number of seconds between particle emissions
float emissionRate = 0.02;
// Number of particles to releast on each emission
integer partPerEmission = 1;
///////////////////////////////////////////////////////
// Angular Variables
///////////////////////////////////////////////////////
// The radius used to spawn angular particle patterns
float radius = 3.0;
// Inside angle for angular particle patterns
float innerAngle = 1;
// Outside angle for angular particle patterns
float outerAngle = 0;
// Rotational potential of the inner/outer angle
vector omega = <0.0, 0.0, 0.2>;
///////////////////////////////////////////////////////
// Movement & Speed Variables
///////////////////////////////////////////////////////
// The minimum speed a particle will be moving on creation
float minSpeed = 0.0;
// The maximum speed a particle will be moving on creation
float maxSpeed = 0.1;
// Global acceleration applied to all particles
vector acceleration = <0.0, 0.0, -0.5>;
// If true, particles will be blown by the current wind
integer windEffect = FALSE;
// if true, particles 'bounce' off of the object's Z height
integer bounceEffect = FALSE;
// If true, particles spawn at the container object center
integer followSource = FALSE;
// If true, particles will move to expire at the target
//integer followTarget = TRUE;
// Desired target for the particles (any valid object/av key)
// target Needs to be set at runtime
key target = "";
///////////////////////////////////////////////////////
//As yet unimplemented particle system flags
///////////////////////////////////////////////////////
integer randomAcceleration = FALSE;
integer randomVelocity = FALSE;
integer particleTrails = FALSE;
///////////////////////////////////////////////////////
// Pattern Selection
///////////////////////////////////////////////////////
// Uncomment the pattern call you would like to use
// Drop parcles at the container objects' center
//integer pattern = PSYS_SRC_PATTERN_DROP;
// Burst pattern originating at objects' center
//integer pattern = PSYS_SRC_PATTERN_EXPLODE;
// Uses 2D angle between innerAngle and outerAngle
integer pattern = PSYS_SRC_PATTERN_ANGLE;
// Uses 3D cone spread between innerAngle and outerAngle
//integer pattern = PSYS_SRC_PATTERN_ANGLE_CONE;
//
//integer pattern = PSYS_SRC_PATTERN_ANGLE_CONE_EMPTY;
setParticles()
{
// Here is where to set the current target
// llGetKey() targets this script's container object
// llGetOwner() targets the owner of this script
// Feel free to insert any other valid key
target="";
// The following block of if statements is used to construct the mask
if (colorInterpolation) effectFlags = effectFlags|PSYS_PART_INTERP_COLOR_MASK;
if (sizeInterpolation) effectFlags = effectFlags|PSYS_PART_INTERP_SCALE_MASK;
if (windEffect) effectFlags = effectFlags|PSYS_PART_WIND_MASK;
if (bounceEffect) effectFlags = effectFlags|PSYS_PART_BOUNCE_MASK;
if (followSource) effectFlags = effectFlags|PSYS_PART_FOLLOW_SRC_MASK;
if (followVelocity) effectFlags = effectFlags|PSYS_PART_FOLLOW_VELOCITY_MASK;
if (target!="") effectFlags = effectFlags|PSYS_PART_TARGET_POS_MASK;
if (glowEffect) effectFlags = effectFlags|PSYS_PART_EMISSIVE_MASK;
//Uncomment the following selections once they've been implemented
// if (randomAcceleration) effectFlags = effectFlags|PSYS_PART_RANDOM_ACCEL_MASK;
// if (randomVelocity) effectFlags = effectFlags|PSYS_PART_RANDOM_VEL_MASK;
// if (particleTrails) effectFlags = effectFlags|PSYS_PART_TRAIL_MASK;
llParticleSystem([
PSYS_PART_FLAGS, effectFlags,
PSYS_SRC_PATTERN, pattern,
PSYS_PART_START_COLOR, startColor,
PSYS_PART_END_COLOR, endColor,
PSYS_PART_START_ALPHA, startAlpha,
PSYS_PART_END_ALPHA, endAlpha,
PSYS_PART_START_SCALE, startSize,
PSYS_PART_END_SCALE, endSize,
PSYS_PART_MAX_AGE, particleLife,
PSYS_SRC_ACCEL, acceleration,
PSYS_SRC_TEXTURE, texture,
PSYS_SRC_BURST_RATE, emissionRate,
PSYS_SRC_INNERANGLE, innerAngle,
PSYS_SRC_OUTERANGLE, outerAngle,
PSYS_SRC_BURST_PART_COUNT, partPerEmission,
PSYS_SRC_BURST_RADIUS, radius,
PSYS_SRC_BURST_SPEED_MIN, minSpeed,
PSYS_SRC_BURST_SPEED_MAX, maxSpeed,
PSYS_SRC_MAX_AGE, SystemLife,
PSYS_SRC_TARGET_KEY, target,
PSYS_SRC_OMEGA, omega ]);
}
default
{
state_entry()
{
running=TRUE;
llSetText("Running", <0.0, 1.0, 0.0>, 0.5);
setParticles();
}
touch_start(integer num_detected)
{
if (running==TRUE)
{
running=FALSE;
llSetText("Stopped", <1.0, 0.0, 0.0>, 0.5);
llParticleSystem([]);
}
else
{
running=TRUE;
llSetText("Running", <0.0, 1.0, 0.0>, 0.5);
setParticles();
}
}
}