Difference between revisions of "LlMakeFire"

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todo: Write an equivalent llParticleSystem example script that duplicates the functionality of this particle command.
 
Beginning in 1.14, the simulator will be using llParticleSystem to emulate legacy llMakeFire particles.
 
llMakeFire(integer particle_count,
          float particle_scale,
          float particle_speed,
          float particle_lifetime,
          float source_cone,
          string source_texture_id,
          vector local_offset);
 
fakeMakeFire(integer particle_count, float particle_scale, float particle_speed,
            float particle_lifetime, float source_cone, string source_texture_id,
            vector local_offset)
{
//    local_offset is ignored
  llParticleSystem([
      PSYS_PART_FLAGS,            PSYS_PART_INTERP_COLOR_MASK|PSYS_PART_INTERP_SCALE_MASK|PSYS_PART_EMISSIVE_MASK|PSYS_PART_WIND_MASK,
      PSYS_SRC_PATTERN,            PSYS_SRC_PATTERN_ANGLE_CONE,
      PSYS_PART_START_COLOR,        <1.0, 1.0, 1.0>,
      PSYS_PART_END_COLOR,        <1.0, 1.0, 1.0>,
      PSYS_PART_START_ALPHA,        0.50,
      PSYS_PART_END_ALPHA,        0.10,
      PSYS_PART_START_SCALE,        <particle_scale/2, particle_scale/2, 0.0>,
      PSYS_PART_END_SCALE,        <particle_scale, particle_scale, 0.0>,
      PSYS_PART_MAX_AGE,            0.5,
      PSYS_SRC_ACCEL,                <0.0, 0.0, 0.0>,
      PSYS_SRC_TEXTURE,            source_texture_id,
      PSYS_SRC_BURST_RATE,        5 / particle_count,
      PSYS_SRC_ANGLE_BEGIN,        0.0,
      PSYS_SRC_ANGLE_END,            source_cone * PI,
      PSYS_SRC_BURST_PART_COUNT,    1,
      PSYS_SRC_BURST_RADIUS,        0.0,
      PSYS_SRC_BURST_SPEED_MIN,    particle_speed,
      PSYS_SRC_BURST_SPEED_MAX,    particle_speed,
      PSYS_SRC_MAX_AGE,            particle_lifetime / 2,
      PSYS_SRC_OMEGA,                <0.0, 0.0, 0.0>
      ]);
  }
  //    Known discrepencies:
//    1) The original llMakeFire has random particle lifetime, which cannot be
//      created in the current particle system via a single call
  //    2) The original llMakeFire has continual particle growth throughout its
//      lifetime, ending well past the 4m limit of the current system, on long lived
//      particles
  //    3) several values are not taken 'verbatim' in the original particle system
//      (velocity is not m/sec for instance, and number of particles seems to be
//      wildly off), these are approximated loosely in this simulation via basic
//      divisors, which may not work out the same in some scenarios
  //    4) There is no way to duplicate the offset from the old functions within the
//      new particle system
//    5) These effects do not 'pump' like the older functions do,
//      i.e. its a single, set property, calling it 10 times won't cause
//      10x as many particles, as the old ones did

Revision as of 17:19, 23 March 2007

Emblem-important.png Deprecated
(This function has been deprecated, please use llParticleSystem instead.)

Summary

Function: llMakeFire( integer particles, float scale, float vel, float lifetime, float arc, string texture, vector offset );

Make fire like particles

• integer particles
• float scale
• float vel
• float lifetime
• float arc
• string texture
• vector offset

Caveats

  • This function causes the script to sleep for 0.1 seconds.
  • This function has been deprecated, please use llParticleSystem instead.
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Examples

Deep Notes

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Signature

function void llMakeFire( integer particles, float scale, float vel, float lifetime, float arc, string texture, vector offset );


Beginning in 1.14, the simulator will be using llParticleSystem to emulate legacy llMakeFire particles. 

llMakeFire(integer particle_count,
         float particle_scale,
         float particle_speed,
         float particle_lifetime,
         float source_cone,
         string source_texture_id,
         vector local_offset);

fakeMakeFire(integer particle_count, float particle_scale, float particle_speed,
           float particle_lifetime, float source_cone, string source_texture_id,
           vector local_offset)
{
//    local_offset is ignored
  llParticleSystem([
      PSYS_PART_FLAGS,            PSYS_PART_INTERP_COLOR_MASK|PSYS_PART_INTERP_SCALE_MASK|PSYS_PART_EMISSIVE_MASK|PSYS_PART_WIND_MASK,
      PSYS_SRC_PATTERN,            PSYS_SRC_PATTERN_ANGLE_CONE,
      PSYS_PART_START_COLOR,        <1.0, 1.0, 1.0>,
      PSYS_PART_END_COLOR,        <1.0, 1.0, 1.0>,
      PSYS_PART_START_ALPHA,        0.50,
      PSYS_PART_END_ALPHA,        0.10,
      PSYS_PART_START_SCALE,        <particle_scale/2, particle_scale/2, 0.0>,
      PSYS_PART_END_SCALE,        <particle_scale, particle_scale, 0.0>,
      PSYS_PART_MAX_AGE,            0.5,
      PSYS_SRC_ACCEL,                <0.0, 0.0, 0.0>,
      PSYS_SRC_TEXTURE,            source_texture_id,
      PSYS_SRC_BURST_RATE,        5 / particle_count,
      PSYS_SRC_ANGLE_BEGIN,        0.0,
      PSYS_SRC_ANGLE_END,            source_cone * PI,
      PSYS_SRC_BURST_PART_COUNT,    1,
      PSYS_SRC_BURST_RADIUS,        0.0,
      PSYS_SRC_BURST_SPEED_MIN,    particle_speed,
      PSYS_SRC_BURST_SPEED_MAX,    particle_speed,
      PSYS_SRC_MAX_AGE,            particle_lifetime / 2,
      PSYS_SRC_OMEGA,                <0.0, 0.0, 0.0>
      ]);
  }
 //    Known discrepencies:
//    1) The original llMakeFire has random particle lifetime, which cannot be
//       created in the current particle system via a single call
 //    2) The original llMakeFire has continual particle growth throughout its
//       lifetime, ending well past the 4m limit of the current system, on long lived
//       particles
 //    3) several values are not taken 'verbatim' in the original particle system
//       (velocity is not m/sec for instance, and number of particles seems to be
//       wildly off), these are approximated loosely in this simulation via basic
//       divisors, which may not work out the same in some scenarios
 //    4) There is no way to duplicate the offset from the old functions within the
//       new particle system
//    5) These effects do not 'pump' like the older functions do,
//       i.e. its a single, set property, calling it 10 times won't cause
//       10x as many particles, as the old ones did
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