// SPDX-License-Identifier: MIT
// Copyright (c) 2026 Incoprea
// Flat particle fan
// Not compiled or tested in-world
// Setup: Place in a spare prim; rotate the prim to orient the fan plane. Owner-touch toggles the emitter.
// Stop / restore: Touch to clear the emitter before removing. Existing particles fade according to their lifetime; use Stop particle effect if the starter was removed early.
// Notes: Viewer-only particles do not provide collision geometry. Uses a sparse emission rate and replaces any previous emitter settings. ANGLE uses a planar spread. Particle sprites themselves normally face the camera; the fan is a distribution of positions.
// License: see LICENSE in this distribution.
// Original Incoprea. MIT. Not compiled or tested in-world.
integer active;
default
{
    touch_start(integer count)
    {
        if(llDetectedKey(0)!=llGetOwner())return;
        active=!active;
        if(!active)
        {
            llParticleSystem([]);
            return;
        }
        llParticleSystem([PSYS_PART_FLAGS,PSYS_PART_INTERP_COLOR_MASK,
        PSYS_SRC_PATTERN,PSYS_SRC_PATTERN_ANGLE,PSYS_SRC_ANGLE_BEGIN,0.0,PSYS_SRC_ANGLE_END,1.0,
        PSYS_PART_START_COLOR,<0.6,1.0,0.8>,PSYS_PART_END_COLOR,<0.6,1.0,0.8>,PSYS_PART_START_ALPHA,0.7,PSYS_PART_END_ALPHA,0.0,
        PSYS_PART_START_SCALE,<0.04,0.04,0.0>,PSYS_PART_MAX_AGE,2.0,PSYS_SRC_BURST_RATE,0.25,PSYS_SRC_BURST_PART_COUNT,2,
        PSYS_SRC_BURST_SPEED_MIN,0.5,PSYS_SRC_BURST_SPEED_MAX,0.6]);
    }
}