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Documentation : Effex : Objects : Operators : POP::Surface Properties

### Params

Node Params
Params

#### Particle Group

The particle group to calculate the properties for.

#### Particles

The particle type of the Particle Group to use.
Passive
Vorticity
Liquid
Diffuse

#### Fluid Dynamics

Currently required in order to calculate normal and curvature of particles. Link any fluid dynamics node here.

#### Surface normal

Calculates and attached a surface normal property.

#### Curvature

Calculates and attaches a curvature property.

#### Neighbor Anisotropy

Calculates and attaches a particle anisotropy property. If you don't use a thin sheet that calculates anisotropy, you can use this one in order to use it in the anisotropic mesher (or for any other purpose).

#### Sampling Radius

To find particles nearby this radius defines the maximum distance around each particle to find neighboring particles.

#### Min. Density

Defines the minimum density a particle must have to be included.

#### Max. Density

Defines the maximum density a particle must have to be included.