9

Position Objec t Operator 151
(total number of par ticles/number of objects).
ButifyousetLocationtoanyotheroption,each
objectemitsanumberofparticlesproportionate
to the number of available emission points per
object. For instance, if you set Location to Volume,
then a larger object will emit more particles than
a smaller one. Similarly, with Location set to
Vertices, an object with 100 vertices wi ll emit twice
asmanyparticlesasanobjectwith50.
If you delete from the scene an object designated
as an emitter , its entry in the list is replaced with
“<deleted>”.
UsetheAddandRemovebuttonstoeditthislist.
Add—Adds an object to the list. Click Add, and
thenclickanobjectintheviewport.
By List—Adds multiple objects to the list. Click
By List to open the Select Emitter Objects dialog.
This works just like the Select Objects dialog (page
1–78); hig hlight the objects to use as emitters, and
then click the Select button.
Remove—Removes an object from the list.
Highlight t he objec t in the list, and then click
Remove.
Animated Shape—Turn on to allow particles to
emit from the surface of an object whose form is
animated by morphing or with modifiers.
Subframe Sampling—When on, the operator
acquires animation of the emitter shape on a tick
basis (every 1/4800th of a second) r ather than a
frame basis. This provides greater precision in
allowing the particle positions to follow animation
of the emitter object’s form .
Location group
The Location drop-dow n list lets you specify where
on each emitter the particles appear. This choice
applies to all emitter objects. Default=Surface.
The S elected Vertices/Edges/Faces options in this
list let you emit particles fro m a specific part of
the e mitter object by using an existing sub-object
selection. To create this selection, first convert the
object to an editable mesh or poly, or apply a Mesh
Select or Poly Select modifier (or equivalent),
select the sub-objects that are to emit particles, and
then choose the corresponding Location option. If
the software doesn’t find a sub-object selection, it
uses a ll sub-objects of the indicated ty pe.
Pivot—Emits particles from the original position of
the emitter object’s pivot. Moving the pivot does
notaffectthisoption.
Vertices—Emits particles from randomly selected
vertices of the emitter objects.
Edges—Emits particles from random points along
the edge sub-objects of the emitter objects.
Surf ace—Emits particles from random points on
thesurfaceoftheicon.
Volume—Emits p articles from random points
within the volume of the icon.
Selected Vertices—Emits particles from the current
vertex sub-object selection.
Selected Edges—Emits p ar t icles from the current
edge sub-object selection.
Selected Faces—Emits particles from the current
face or polygon sub-object selection.
You can modify the Location choice with any
combination of the following:
Sur face Offset—Lets you specify a range of
distances f rom the object surface for particle
placement.
Surface Offset is unavailable when Location is
set to Pivot or Volume. U se the Min and Max
parameters to set the range.
Note: Negative values offset the particles below the
surface.
Min/Max—When Surface Offset is on, these let
you specify the range of offset distances f rom the