vortex force field

This field will move the particles in a vortex (swirl), based on the field shape position, rotation and scale. Particles outside of the field will not be affected. ATTENTION!: omni.particle.system.core is currently undergoing extensive (breaking) changes. Please be aware that systems built with the existing extension will need to be rebuilt in the USD Composer 2023.2 release.

Installation

To use this Node, you must enable omni.particle.system.core in the Extension Manager.

Inputs

Name	Type	Description	Default
active	bool	Is the Vortex field active?	True
attenuation	float	Attenuation is how much the effect of the field decays from the ‘center’ to the ‘boundary’ of the Vortex Field Source.	1.0
contain	float	This will affect the overall look of the vortex. Higher values will tighten the vortex in the field.	0.0
magnitude	float	The amount of force to apply to the particles through the vortex field.	1.0
magnitudeRandom	float	Randomize the amount of force through the vortex field.	0.0
randomSeed	uint64	Random Seed is the seed used for generating random numbers. On the emitter, one of the time attributes is also used in conjunction with the main random seed, else on every frame, exactly the same particles would be emitted.	0
pointcloudPoints	pointf[3][]	Input pointcloud points	[]
pointcloudNormals	normalf[3][]	Input pointcloud normals, one for each point	[]
pointcloudPointRadius	float	radius of points in cloud	1.0
particles	bundle	Input particle data, including position and impulse.
$accelTree	bundle	Bounding geometry acceleration structure
prim	bundle	Input geometry prims
primPath	path	Input geometry prim paths

Outputs

Name	Type	Description	Default
particles	bundle	Output particle data, including position and velocity.