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Set nParticle Dynamic Properties
Creating nParticles
Create Liquid Simulations with nParticles
Generate Force Fields with nParticles
You can generate a
force field from your nParticle object that either pushes or pulls
nCloth objects or other nParticle objects away from or toward your nParticles.
Positive Point Field Magnitude values
produce a force that pushes Nucleus objects away, while negative Point
Field Magnitude values generate a force that pulls objects
towards the nParticles. The active area or region of the force field
is defined by a Point Field Distance attribute.
You can use the Point Field Scale ramp to control
how Point Field Magnitude is distributed along
the area defined by Point Field Distance.
nParticle objects can also generate a Self
Attract force. By adjusting Self Attract,
an nParticle object’s individual particles can be made to attract
or repel each other.
To
generate a force field for an nParticle object
- Select
the nParticle object that you want to generate force fields.
- In
the Attribute Editor, select the
nParticle object’s nParticleShape tab.
- In
the Point Field Generation section,
turn on force fields by selecting one of the following from the Point
Force Field list:
- ThicknessRelative:
Generates a Point Force Field that is relative
to the radius of the nParticle object. See
Radius.
- World
Space: Generates a Point Force Field that
is relative to world space.
- Adjust Point
Field Magnitude to increase or decrease the Point
Force Field strength.
- Adjust Point
Field Distance to specify how far from the nParticles’
center the force field will be active.
Nucleus objects located in the area specified
by the Point Field Distance are affected
by the nParticle’s Point Force Field.
Controlling a Point Force Field using
the Point Field Scale ramp
You can use the Point Field Scale ramp
to provide additional control of your nParticle object’s Point
Force Field. For example, you can define a Point
Field Scale curve that varies Point Field Magnitude along
the area defined by Point Field Distance.
For information about nParticle attribute ramps,
see
Working with nParticle attribute ramps.
To
control a Point Force Field using the Point
Field Scale ramp
- Select
the nParticle object that you want to generate point force fields,
and in the Attribute Editor, adjust the
object’s Point Force Field attributes.
See
To generate a force field for nCloth.
- In
the Point Field Scale section of
the Attribute Editor, set the ramp options
by doing the following:
- Create
the Point Field Scale curve by
setting values for Selected Position and Selected
Value. For more information, see
Point Field Scale.
- Set
an Interpolation method to determine
how Point Field Magnitude blends
between each position on the ramp. See
Interpolation.
- Set Point
Field Scale Input to determine which attribute is used
as the input attribute for the Point Field Scale ramp.
See
Point Field Scale Input.
- Set Input
Max to define the range of the Point Field Scale ramp.
See
Input Max.
Setting Point Field Dropoff
You can use the Point Field Dropoff ramp
to specify how much the Point Field Magnitude drops
off nParticle’s center and the edge of the area defined by Point
Field Distance.
For information about nParticle attribute ramps,
see
Set nParticle attribute ramps.
To
set the Point Field Dropoff
- Select
the nParticle object that you want to generate point force fields,
and in the Attribute Editor, adjust the
object’s Point Force Field and Point
Field Scale attributes.
- In
the Point Field Dropoff section
of the Attribute Editor, set the ramp options
by doing the following:
- Create
the Point Field Curve curve by
setting values for Selected Position and Selected
Value. See
Point Field Dropoff.
- Set
an Interpolation method to determine
how Point Field Dropoff blends between
each position on the ramp. See
Interpolation.