pymel.core.effects.setParticleAttr

setParticleAttr(*args, **kwargs)

This action will set the value of the chosen attribute for every particle or selected component in the selected or passed particle object. Components should not be passed to the command line. For setting the values of components, the components must be selected and only the particle object’s names should be passed to this action. If the attribute is a vector attribute and the -vv flag is passed, then the three floats passed will be used to set the values. If the attribute is a vector and the -fv flag is pass and the -vv flag is not passed, then the float will be repeated for each of the X, Y, and Z values of the attribute. Similarly, if the attribute is a float attribute and a vector value is passed, then the length of the vector passed will be used for the value. Note: The attribute passed must be a Per- Particle attribute.

Flags:

Long name (short name)		Argument Types	Properties
attribute (at)		unicode
	Tells the action which attribute you want to set
floatValue (fv)		float
	Tells what you want the value to be set to of a float attribute
object (o)		unicode
	If this flag is passed and the STRING is the name of a particle object’s transform or shape, then ONLY that object will be edited, ignoring the selection list or command line, and ALL of its particles’ values will be changed for the specified attribute.Flag can appear in Create mode of commandFlag can have multiple arguments, passed either as a tuple or a list.
randomFloat (rf)		float
	Tells the command to add a random value from -FLOAT to +FLOAT to the results of each particle. The default is 0.0.
randomVector (rv)		float, float, float
	Tells the command to add a random value from -x,-y,-zto x,y,zto the results of each particle. The default 0 0 0.
relative (r)		bool
	If this is set to TRUE (the default is FALSE), then the float or vector value will be added to the current value for each particle.
vectorValue (vv)		float, float, float
	Tells what you want the value to be set to of a vector attribute

Derived from mel command maya.cmds.setParticleAttr

Example:

import pymel.core as pm

import maya.cmds as cmds

pm.setParticleAttr( 'particle1', at='velocity', vv=(1, 2, 3) )
# This will set the velocity of all of the particles in particle1
# to "" 1, 2, 3 "".

pm.select( 'particleShape1.pt[0:7]', 'particleShape1.pt[11]' )
pm.setParticleAttr( vv=(1, 2, 3), at='velocity' )
pm.setParticleAttr( 'particleShape1', at='velocity' )

# This will set the velocity of particles 0-7 and 11 of
# particleShape1 to "" 1, 2, 3 "".  The rest of the particles are
# not changed.