nParticle Force Field Generation attributes

Uses these attribute to generate a force field that can push (positive fields) nCloth objects and other nParticle objects away from the current nParticles, and pull (negative fields) nCloth objects and other nParticle objects toward the current nParticles. A Point Force Field can only be exerted on Nucleus objects that are assigned to the same Nucleus solver as the nParticle object generating the Point Force Field.

Point Force Field

Sets the orientation of the Point Force Field.

Off

When turned off, the Point Force Field is not enabled.

World space

Point Force Field is set relative to world space.

Thickness Relative

Point Force Field is relative to the radius of individual nParticles. nParticles with higher Radius values generate stronger Point Force Fields relative to nParticles with low Radius values.

Point Field Magnitude

Sets the strength of the Point Force Field. Positive Point Field Magnitude values push nCloth objects and other nParticle objects away from the current nParticles. Negative Point Field Magnitude values pull nCloth objects and other nParticle objects toward the current nParticles.

Self Attract

Sets the strength of self attractive forces between the points (individual particles) of an nParticle object. Positive Self Attract values pull the points (individual particles) of an nParticle object together. Negative Self Attract values push the points (individual particles) away from each other.

Point Field Distance

Sets the distance (in field units) from the radius of the force generating nParticle that the Point Force Field is active. Outside the Point Field Distance, the Point Force Field does not affect nCloth objects and other nParticle objects.

Point Field Scale

Sets a Point Field Scale ramp that can be used to vary Point Field Magnitude along the Point Field Distance. See Set attributes using ramps.

Selected Position

This value indicates the position of the Point Field Magnitude on the ramp. The left position on ramp represents Point Field Magnitude at the outside radius of the nParticles. The right position on the curve represents Point Field Magnitude at the edge of the Point Field Distance.

Selected Value

This value indicates Point Field Magnitude at the selected position.

Interpolation

Controls the way per-particle attribute values blend between each position on the ramp. The default setting is Linear.

None

The curve is flat between points.

Linear

The per-particle attribute values are interpolated with a linear curve.

Smooth

The per-particle attribute values are interpolated along a bell curve, so that each value on the ramp dominates the region around it, then blends quickly to the next value.

Spline

The per-particle attribute values are interpolated with a spline curve, taking neighboring indices into account for greater smoothness.

Point Field Scale Input

Specifies which attribute is used to map Point Field Scale ramp values.

Off

When off, the per-particle attributes are deleted. If you want to use an expression with the per-particle attribute, you need to manually add them again. See About nParticle internal ramps and per-particle attributes.

Age

The per-particle attribute values are determined by the nParticle’s age, which is based on the particle Lifespan mode. See nParticle Lifespan attributes.

Normalized Age

The per-particle attribute values are determined by the normalized age of the nParticle. To use Normalized Age, the nParticle object must have a defined lifespan. For example, the nParticle object’s Lifespan Mode attribute must be set to Constant or Random range.

When Normalized Age is used, The per-particle attribute values are mapped within the range of the nParticle object’s lifespan.

Speed

The per-particle attribute values are determined by nParticle speed.

Acceleration

The per-particle attribute values are determined by nParticle acceleration.

Particle ID

The per-particle attribute values are determined by the nParticle’s ID. Particle IDs are unique and generated at the beginning of the particle’s lifespan.

Randomizing ID

The per-particle attribute values are determined by a randomized nParticle ID.

Input Max

Sets the maximum value for the range used by the ramp.

Point Field Dropoff

Sets a ramp that specifies how much the Point Field Magnitude drops off as you move away from the nParticle and toward the edge of the area defined by Point Field Distance. See Set attributes using ramps.

Selected Position

This value indicates the amount of Point Field Dropoff on the ramp. The left position on ramp represents the amount Point Field Dropoff at the outside radius of the nParticles. The right position on the curve represents Point Field Dropoff at the edge of the Point Field Distance.

Selected Value

This value indicates the magnitude of the Point Force Field at the selected position.

Interpolation

Controls the way per-particle attribute values blend between each position on the ramp. The default setting is Linear.

None

The curve is flat between points.

Linear

The per-particle attribute values are interpolated with a linear curve.

Smooth

The per-particle attribute values are interpolated along a bell curve, so that each value on the ramp dominates the region around it, then blends quickly to the next value.

Spline

The per-particle attribute values are interpolated with a spline curve, taking neighboring indices into account for greater smoothness.