Lumberyard
User Guide (Version 1.15)

Circle Emitter (CPU and GPU)

The Circle emitter enables spawning of particles along the shapes axial coordinate system (see diagram below). This allows you to create complex circular and cylindrical effects.

The following is an example of the Circle emitter in the Preview viewport.

The following are parameters for the Circle emitter.

Circle Emitter Parameters

Parameter Description
Emitter Size Sets the size of the circle emitter in meters.

Valid values: 0+ (radius)

Default value: 5

Spawn Pos XYZ XYZ values define the spawning position away from the emitter itself in emitter space. You can set a Random value and Strength over Emitter Lifetime curve.

Valid values: any

Default value: 0, 0, 0
Spawn Pos XYZ Random For additional random layering, XYZ values define the range of random spawning in both directions, away from the spawn position. You can set a Random value and Strength over Emitter Lifetime curve.

Valid values: any

Default value: 0, 0, 0

Spawn Pos Increment XYZ Spawns each subsequent particle at incremental positions along the axis over the emitter size, based on a percentage value. For example, if you set a value of 20, a particle spawn every 20% along the axis, making 5 particles on the axis to equal 100%. You can set a Random value and Strength over Emitter Lifetime curve.

Valid values: any (percentage)

Default value: 0

Spawn Pos Increment XYZ Random Provides another layer of randomization for each particle to spawn at percentages over the axis, independent of the Spawn Pos Increment parameter. You can set a Random value and Strength Over Emitter Lifetime curve.

Valid values: any (percentage)

Default value: 0

Velocity XYZ XYZ values define the velocity applied to particles in world space. The velocity direction also sets the axis around which velocity spread occurs. You can set a Random value and Strength over Emitter Lifetime curve.

Valid values: any

Default values: 0, 0, 0

Velocity XYZ Random For additional random layering, XYZ values define the random velocity applied to particles in world space. You can set a Random value and Strength over Emitter Lifetime curve.

Valid values: any

Default value: 0, 0, 0