SLUniverse Forums

// Keknehv's Particle Script v1.2
// 1.0 -- 5/30/05
// 1.1 -- 6/17/05
// 1.2 -- 9/22/05 (Forgot PSYS_SRC_MAX_AGE)
 //     This script may be used in anything you choose, including and not limited to commercial products. 
//     Just copy the MakeParticles() function; it will function without any other variables in a different script
//         ( You can, of course, rename MakeParticles() to something else, such as StartFlames() )
 //    This script is basically an llParticleSystem() call with comments and formatting. Change any of the values
//    that are listed second to change that portion. Also, it is equipped with a touch-activated off button,
//    for when your particles go haywire and cause everyone to start yelling at you.
 //  Contact Keknehv Psaltery if you have questions or comments.

MakeParticles()                //This is the function that actually starts the particle system.
{                
    llParticleSystem([ //KPSv1.0  
 PSYS_PART_FLAGS , 0 //Comment out any of the following masks to deactivate them
 //| PSYS_PART_BOUNCE_MASK           //Bounce on object's z-axis
 //| PSYS_PART_WIND_MASK             //Particles are moved by wind
    | PSYS_PART_INTERP_COLOR_MASK //Colors fade from start to end
    | PSYS_PART_INTERP_SCALE_MASK //Scale fades from beginning to end
    | PSYS_PART_FOLLOW_SRC_MASK //Particles follow the emitter
    | PSYS_PART_FOLLOW_VELOCITY_MASK //Particles are created at the velocity of the emitter
 //| PSYS_PART_TARGET_POS_MASK       //Particles follow the target
    | PSYS_PART_EMISSIVE_MASK //Particles are self-lit (glow)
 //| PSYS_PART_TARGET_LINEAR_MASK    //Undocumented--Sends particles in straight line?
    ,
    
    //PSYS_SRC_TARGET_KEY , NULL_KEY,   //Key of the target for the particles to head towards
 //This one is particularly finicky, so be careful.
 //Choose one of these as a pattern:
 //PSYS_SRC_PATTERN_DROP                 Particles start at emitter with no velocity
 //PSYS_SRC_PATTERN_EXPLODE              Particles explode from the emitter
 //PSYS_SRC_PATTERN_ANGLE                Particles are emitted in a 2-D angle
 //PSYS_SRC_PATTERN_ANGLE_CONE           Particles are emitted in a 3-D cone
 //PSYS_SRC_PATTERN_ANGLE_CONE_EMPTY     Particles are emitted everywhere except for a 3-D cone
 PSYS_SRC_PATTERN,           PSYS_SRC_PATTERN_ANGLE_CONE
    
    ,PSYS_SRC_TEXTURE,           "" //UUID of the desired particle texture, or inventory name
    ,PSYS_SRC_MAX_AGE,           0.0                //Time, in seconds, for particles to be emitted. 0 = forever
    ,PSYS_PART_MAX_AGE,          1.0                //Lifetime, in seconds, that a particle lasts
    ,PSYS_SRC_BURST_RATE,        0.02               //How long, in seconds, between each emission
    ,PSYS_SRC_BURST_PART_COUNT,  2                  //Number of particles per emission
    ,PSYS_SRC_BURST_RADIUS,      5.0                //Radius of emission
    ,PSYS_SRC_BURST_SPEED_MIN,   5.5                //Minimum speed of an emitted particle
    ,PSYS_SRC_BURST_SPEED_MAX,   6.0                //Maximum speed of an emitted particle
    ,PSYS_SRC_ACCEL,             <0.0,0.0,-0.8> //Acceleration of particles each second
    ,PSYS_PART_START_COLOR,      <0.0,0.0,1.0> //Starting RGB color
    ,PSYS_PART_END_COLOR,        <0.6,0.6,1.0> //Ending RGB color, if INTERP_COLOR_MASK is on 
    ,PSYS_PART_START_ALPHA,      0.9                //Starting transparency, 1 is opaque, 0 is transparent.
    ,PSYS_PART_END_ALPHA,        0.0                //Ending transparency
    ,PSYS_PART_START_SCALE,      <2.4,2.4,0.0> //Starting particle size
    ,PSYS_PART_END_SCALE,        <1.3,2.3,0.0> //Ending particle size, if INTERP_SCALE_MASK is on
    ,PSYS_SRC_ANGLE_BEGIN,       PI //Inner angle for ANGLE patterns
    ,PSYS_SRC_ANGLE_END,         PI //Outer angle for ANGLE patterns
    ,PSYS_SRC_OMEGA,             <0.0,0.0,0.0> //Rotation of ANGLE patterns, similar to llTargetOmega()
 ]);
}

default
{    
    state_entry()
    {
        MakeParticles();                //Start making particles
    }

    touch_start( integer num )            //Turn particles off when touched
    {
        state off;        //Switch to the off state
    }
}

state off
{
    state_entry()
    {
        llParticleSystem([]);        //Stop making particles
    }
    
    touch_start( integer num )        //Turn particles back on when touched
    {
        state default;
    }
}