Beginning in 1.14, the simulator will be using llParticleSystem to emulate legacy llMakeFountain particles.
llMakeFountain(integer particle_count,
float particle_scale,
float particle_speed,
float particle_lifetime,
float source_cone,
integer source_bounce,
string source_texture_id,
vector local_offset,
vector bounce_offset);
fakeMakeFountain(integer particle_count, float particle_scale, float particle_speed,
float particle_lifetime, float source_cone, integer bounce,
string source_texture_id, vector local_offset, vector bounce_offset)
{
// local_offset is ignored
// bounce is ignored
// bounce_offset is ignored
llParticleSystem([
PSYS_PART_FLAGS, PSYS_PART_INTERP_COLOR_MASK|PSYS_PART_INTERP_SCALE_MASK|PSYS_PART_WIND_MASK|PSYS_PART_BOUNCE_MASK|PSYS_PART_EMISSIVE_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, 0.25,
PSYS_PART_START_SCALE, <particle_scale/1.5, particle_scale/1.5, 0.0>,
PSYS_PART_END_SCALE, <0.0, 0.0, 0.0>,
PSYS_PART_MAX_AGE, 3.0,
PSYS_SRC_ACCEL, <1.0, 0.0, -4>,
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 discrepancies:
// 1) The bounce level is not adjustable with the new particle system,
// it will be fixed to 0
// 2) The original llMakeFountain has random particle lifetime, which cannot be
// created in the current particle system via a single call
// 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
