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138 Chapter 11: Space Warps and Particle Systems
Selection rollout
Use these controls for selec ting particles on a
per-part icle or event basis. Selection of particles
at the Event level is for debugging and tracking
purposes. Particles selected at the Particle level
can be acted upon by the Delete operator (page
2–146) and the Split S elected test (page 2–235).You
cannot directly manipulate selected particles with
standard3dsMaxtoolssuchasMoveandRotate.
Note: This rollout appears only on the Modify
panel, not on the Create panel or Particle View
dialog > p arameters panel.
Part icle—Lets you select particles by click ing
them or dragging a region.
Event—Lets you select particles by event. At
this level, you can select all particles in one or more
events by hig h lighting the event(s) in the Select
By Event list,orintheviewportswithstandard
selection methods. To conv ert a selection from
the Event level to the Particle level for use with the
Delete operator or Split Selected test, use Get From
Event Level.
Selected particles appear in the viewports in red
(if not geometry), in the form desi gnate d by the
Display operator > Selected setting.
Selec t by Particle ID group
Each particle has a unique ID number, starting
with 1 for the first particle and counting up. Use
these controls to select and deselect particles by
their ID numbers. Available only at the Particle
selection level.
Tip: YoucandisplayparticleIDsintheviewports
by turning on Display operator > Show Particle
IDs.
ID—UsethistosettheIDnumberoftheparticle
you want to select. You c an set only one number
at a time.
Add—AftersettingtheIDnumberofaparticle
to select, click Add to add it to the selection. By
default, selecting a particle doesn’t deselect any
others.
Remove—After setting the ID number of a particle
to deselect, click Remove to remove it from the
selection.
Clear S election —When on, clicking Add to select a
particle deselects all other particles.
Get From Event Level—Click to convert an
Event-level selection to the Particle level. Available
onlyattheParticlelevel.
Select By Event—This list shows all events in
Particle Flow, and highlights selected events. To
select all of an event’s particles, click its list entry,
or use standard viewport-selection methods.
#ParticlesSelected—Shows the number of selected
particles.