1 // From the book:
  2 //
  3 // Scripting Recipes for Second Life
  4 // by Jeff Heaton (Encog Dod in SL)
  5 // ISBN: 160439000
  6 X// Copyright 2007 by Heaton Research, Inc.
  7 //
  8 // This script may be freely copied and modified so long as this header
  9 // remains unmodified.
 10 //
 11 // For more information about this book visit the following web site:
 12 //
 13 // http://www.heatonresearch.com/articles/series/22/
 14 
 15 generalParticleEmitterOn()                
 16 {   
 17     llParticleSystem([                   
 18         PSYS_PART_FLAGS , 0 
 19     //| PSYS_PART_BOUNCE_MASK       //Bounce on object's z-axis
 20     | PSYS_PART_WIND_MASK           //Particles are moved by wind
 21     | PSYS_PART_INTERP_COLOR_MASK   //Colors fade from start to end
 22     | PSYS_PART_INTERP_SCALE_MASK   //Scale fades from beginning to end
 23     | PSYS_PART_FOLLOW_SRC_MASK     //Particles follow the emitter
 24     | PSYS_PART_FOLLOW_VELOCITY_MASK//Particles are created at the velocity of the emitter
 25     //| PSYS_PART_TARGET_POS_MASK   //Particles follow the target
 26     | PSYS_PART_EMISSIVE_MASK       //Particles are self-lit (glow)
 27     //| PSYS_PART_TARGET_LINEAR_MASK//Undocumented--Sends particles in straight line?
 28     ,
 29     
 30     //PSYS_SRC_TARGET_KEY , NULL_KEY,//The particles will head towards the specified key
 31     //Select one of the following for a pattern:
 32     //PSYS_SRC_PATTERN_DROP                 Particles start at emitter with no velocity
 33     //PSYS_SRC_PATTERN_EXPLODE              Particles explode from the emitter
 34     //PSYS_SRC_PATTERN_ANGLE                Particles are emitted in a 2-D angle
 35     //PSYS_SRC_PATTERN_ANGLE_CONE           Particles are emitted in a 3-D cone
 36     //PSYS_SRC_PATTERN_ANGLE_CONE_EMPTY     Particles are emitted everywhere except for a 3-D cone
 37     
 38     PSYS_SRC_PATTERN,           PSYS_SRC_PATTERN_ANGLE_CONE
 39     
 40     ,PSYS_SRC_TEXTURE,           ""           //UUID of the desired particle texture, or inventory name
 41     ,PSYS_SRC_MAX_AGE,           0.0            //Time, in seconds, for particles to be emitted. 0 = forever
 42     ,PSYS_PART_MAX_AGE,          4.0            //Lifetime, in seconds, that a particle lasts
 43     ,PSYS_SRC_BURST_RATE,        0.5            //How long, in seconds, between each emission
 44     ,PSYS_SRC_BURST_PART_COUNT,  6              //Number of particles per emission
 45     ,PSYS_SRC_BURST_RADIUS,      10.0           //Radius of emission
 46     ,PSYS_SRC_BURST_SPEED_MIN,   .4             //Minimum speed of an emitted particle
 47     ,PSYS_SRC_BURST_SPEED_MAX,   .5             //Maximum speed of an emitted particle
 48     ,PSYS_SRC_ACCEL,             <0,0,1>    //Acceleration of particles each second
 49     ,PSYS_PART_START_COLOR,      <1,0,0>  //Starting RGB color
 50     ,PSYS_PART_END_COLOR,        <1,0,0>  //Ending RGB color, if INTERP_COLOR_MASK is on 
 51     ,PSYS_PART_START_ALPHA,      1.0            //Starting transparency, 1 is opaque, 0 is transparent.
 52     ,PSYS_PART_END_ALPHA,        1.0            //Ending transparency
 53     ,PSYS_PART_START_SCALE,      <.25,.25,.25>  //Starting particle size
 54     ,PSYS_PART_END_SCALE,        <1.5,1.5,1.5>  //Ending particle size, if INTERP_SCALE_MASK is on
 55     ,PSYS_SRC_ANGLE_BEGIN,       300 * DEG_TO_RAD //Inner angle for ANGLE patterns
 56     ,PSYS_SRC_ANGLE_END,         60 * DEG_TO_RAD//Outer angle for ANGLE patterns
 57     ,PSYS_SRC_OMEGA,             <0.0,0.0,0.0>  //Rotation of ANGLE patterns, similar to llTargetOmega()
 58             ]);
 59 }
 60 
 61 generalParticleEmitterOff()
 62 {
 63     llParticleSystem([]);
 64 }
 65 
 66 default
 67 {    
 68     state_entry()
 69     {
 70         generalParticleEmitterOn();
 71     }
 72 
 73     touch_start( integer num )            
 74     {
 75         // uncomment the following line to allow this effect to be turned off
 76         //state off;        
 77     }
 78 }
 79 
 80 state off
 81 {
 82     state_entry()
 83     {
 84         generalParticleEmitterOff();
 85     }
 86     
 87     touch_start( integer num )        
 88     {
 89         state default;
 90     }
 91 }