Some
nParticle attributes have internal ramps that allow you to control
the way the attributes are applied to your nParticle objects. Using
nParticle internal ramps, you can set attributes on a per-particle
basis as well as vary attribute values during your simulation.
For more information
about nParticle attribute ramps, see
nParticle internal ramps and per-particle attributes.
To set an nParticle attribute ramp
- In the scene view, select the nParticle
object for which you want to set an attribute ramp.
- In the Attribute Editor,
select the nParticleShape tab.
- In the Attribute Editor,
locate the attribute ramp you want set, and then create the ramp’s
curve by setting values for Selected Position and Selected
Value.
By clicking on the graph
and dragging the points, you can make a curve that defines specific
attribute values for any input value. You can also set your ramp
in a larger attribute ramp window.
- Set an Interpolation method
to specify how values blend between each Selected Position (point)
on ramp. You can select from the following options:
- None does
not interpolate the values, meaning that the curve is flat between
points.
- Linear interpolates
values using a linear curve.
- Smooth interpolates
values using a bell curve, so that each value on the ramp dominates
the region around it, then blends quickly to the next value.
- Spline interpolates
values using a spline curve, taking neighboring indices into account
for greater smoothness.
- Set the ramp’s scale input to specify
which attribute or property is used to scale or map the input attribute
value.
Working with attribute ramps in a separate
large window
- Click the arrow on the right side of
the attribute ramp to open the ramp in a larger window.
In this window, you can
add points to the curve as well as edit the interpolation method, Selected
Value and Selected Position.
- Make any necessary adjustments to the
ramp, and then close the window.
Any changes made to the
ramp are applied to the attribute ramp in the Attribute Editor.
