9

Empty Flow 209
Empty Flow (page 2–209)
Standard Flow (page 2–209)
See also
Operators (page 2–142)
Tests (page 2–210)
Empty Flow
Particle View (page 2–125) >depot
Empty Flow provides a starting point for a
particle system consisting of a single g lobal event
containing a Render operat or. This lets you build
a system completely f rom scratch, without having
first to delete the default operators provided by the
Standard Flow system.
TouseEmptyFlow,dragitfromthedepotto
the event display. In Particle View, this creates a
global e vent containing a single Render operator.
If the Global default display option is active in the
Particle View > Options menu, the global event
will also contain a Display operator. Adding an
Empty Flow also creat es a Particle Flow Source
icon in the viewports, at the world origin (0,0,0).
Note: If an orthogonal view port is active when you
add an Empty Flow to the system, the software
orients the new source icon p arallel to the plane
oftheactiveviewport,withthedefaultemission
direction pointing forward. For example, if the
Fron t viewport is active, the icon is oriented
parallel to the XZ plane in the world coordinate
system, with the default emission direction along
thepositiveYaxis. IfaCameraorPerspective
viewport is active, Particle Flow uses the default
orientation: parallel to the XY plane, pointing in
thenegativeZdirection.
See also
Standard Flow (page 2–209)
Standard Flow
Particle View (page 2–125) >depot
Standard Flow provides a starting point for
a particle system consisting of a global event
containing a Render operator, wired to a birth
event containing a Birth, a Posit ion, a Speed, a
Rotation, a Shape, and a Display operator , with all
parameters set to default values. This is the same
system that the software creates automatical ly
when you add a Particle Flow icon to the viewport.
To use Standard Flow, drag it from the depot to
the event display. In Particle View, this creates
theparticlesystemdescribedabove.IftheGlobal
default display option is active in the Particle
View > Options menu, the global e vent will a lso
contain a Display operator. Adding a Standard
Flow also creates a Particle Flow Source icon in the
viewports, at the world orig in (0,0,0).
Note: If an orthogonal viewport is active when you
add a Standard Flow to the system, the software
orients the new source icon parallel to the plane
of the active v iewport, with the default emission
direction pointing forward. For example, if the
Fron t viewport is active, the icon is oriented
paralleltotheXZplaneintheworldcoordinate
system, with the default emission direction along
the positive Y axis. If a Camera or Perspective
viewport is active, Particle Flow uses the default
orientation: parallel to the XY plane, pointing in
the negative Z direction.
See also
Empty Flow (page 2–209)