RDNWiki: DOWFXTool/SprayEffect ...

Spray Effect

• Emitter_deviation: Allows you to select how wide the cone of emission is, in degrees. The maximum value that you can enter here is 360 (full sphere, sprays in every direction), and the minimum value is 0 (straight up, or in the direction of the effect). For example, entering a value of 180 will create a spray pattern in a half sphere. Can be animated.
• Emitter_Direction: Allows you to set the emitter direction. 0 would be “default” setting and would shoot in the normal direction. A value of 1 will always make it shoot up, no matter what direction the marker is pointing (useful for things like fire), and 2 will always shoot down no matter which direction the marker is pointing.
• Emitter_Drag: Allows you to set the drag or “air resistance” of particle emitted. Basically the speed at which the velocity of particle decays. 0 is 100% percent drag and 1 is 0% drag. This value cannot be animated.
• Emitter_Duration: The duration that the emitter will spawn the effect. Possible values are 0.1 to 30 (in seconds). Extremely low values (below 0.05) are not practical since no or very few particles are ‘released’ from the emitter.
• Emitter_InheritVelocity: The amount of vectored velocity inherited from the movement of the emitter- meaning, particles take on a percentage of the parented object’s movement and speed.
• Emitter_Loop: Check box that determines if the emitter will return to the start of the effect and repeat in a loop. Useful for making never ending effects such as a steam vent.
• Emitter_Offset: Allows you to animate the XYZ offset for the emitter relative to a marker. If there is no marker, the effect will offset to the model’s space coordinate. The following is a screen-shot of the Keyframe Editing Window when the Emitter_Offset property is selected. Left-click in the slider to insert new keyframes. Right-click on keyframe markers to delete them.

• Emmiter_RandomStartTime: Offsets the start time so that two instances of the same effect will be offset in time. This only works when looping (via Emitter_Loop) is set to on.

• Emitter_ScaleSpeed: This toggles the inclusion of the emitter’s speed as part of the scaling transformation. Check this box if you want to scale the speed of particles using the “fx_scale” effect-event parameter.
• Emitter_RotRate : Emitter rotation rate in degrees per second. Will rotate the emitter, which will only be visible if you have a local dynamic on. The particles will spin along with the emitter.
• Emitter_Volume: This determines the volume of 3D space that the emitter will occupy, in which particles will be spawned. This is determined with XYZ values, and by adjusting this property, the shape of the emitter will change. For instance a values of {X=5;Y=0;Z=5;} will cause the particles to be spawned across the area of a flat square. Values of {X=0;Y=0;Z=0;} will cause the particles to be spawned at a single point. Can be animated.
• Force First: No matter the rate value at the beginning of the emitter’s duration, it will force one particle to be created the moment the effect is triggered. I.e. Used when you want exactly one and only one particle to be produced from a spray. This allows you to create rings with particle dynamics.
• Gravwell_Strength: Determines the strength of the gravwell’s influence on particles at any given time in the effect’s duration. Can be animated. Used in FX like the ‘swirling’ particles around the Farseer or the summoning of the Bloodthirster and all of the Chaos structures build FX. In these FX it helps to offset the emitter and rotate it so that the particles are constantly chasing it, and tend to swirl about nicely.
• Particle_Dynamics: This option determines the particle dynamic of the emitter, and helps determine how the particles act. Possible values are from 0 to 11, with each value’s result described in the following table:
• Particle Dynamics Values and Descriptions
  1. Default, particles travel at a constant velocity and trajectory for the duration of the effect.
  2. Particles are affected by gravity but disappear when they collide with the ground.
  3. Particles are affected by gravity but will bounce off the ground as well.DOES NOT CURRENTLY WORK IN DOW. Particles fall through ground.
  4. Particles are affected by gravity but will stick to the ground and stay in place. DOES NOT CURRENTLY WORK IN DOW. Particles fall through ground.
  5. Particles are affected by wind, according to the specified wind vectors.DOES NOT CURRENTLY WORK IN DOW. Wind has not been added in game to wind will have no effect.
  6. Particles will align themselves to the surface of the water plane in the game. These will instantly appear on the water. Given a particle speed, will travel outwards from the center of the effect. NOT USED IN DOW.
  7. All particles created with this dynamic stay local to an emitter’s orientation and translation.
  8. Particles emitted will align themselves to the surface of the ground plane, and if given a particle speed, will follow the contours of the landscape.NOT USED IN DOW.
  9. Particles are affected by gravity but will ignore the ground plane.NOT USED IN DOW.
  10. Particles will align itself to the highest surface.NOT USED IN DOW.
  11. Particles will be attracted back on to the emitter.
  12. Used when emitting beams (i.e. tracer fire) and in conjunction with the FX scale: distance, FX other: target and FX target group (in the Object Editor) so that each individual beam does not get scaled to the target but instead keeps it’s set length in the FX but the distance it travels is the distance to the target. This way the spray of beams will look like they reach the target and then terminate. If you did not use this dynamic the beams would stretch to the target and look like laser beams instead of tracer bolts.
• Particle_Fx: This can be any. LUA file representing a FX, even another particle system. The. LUA file used will actually make up the particles of the spray. As noted above, to view particles, you need to set this option.
• Particle_Scale: The global scaling of particles over time as defined by the user. Can be animated.
• Particle_Speed: The speed at which the FX particles will be emitted from the emitter The user can define the speed of particles over time using the keyframe editing window. Can be animated.

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