9

64 Chapter 11: Space Warps and Particle Systems
Particle stream caught in a vortex
Procedure
To crea te a V or tex spa ce war p:
1.
On the Create panel, click Space War ps.
Choose Forces from t he list, and then click
Vor tex .
2. Determine w hich world axis you want the
vortex to spiral around, and then drag in the
appropriateviewporttocreatethespacewarp.
For example, if you want the vortex to spin
around the vertical world axis, create the space
warpintheTopviewport.Youcanrotatethe
warp later to change the vortex direc tion, and
animate the warp orientation.
The Vortex warp appears as a curved-arrow
icon in the plane you dr ag in, with a second,
perpendicular arrow indicating the axis of
rotation as well as the direction of the well. This
second axis is called the drop axis.
Note: Thepositionofthespacewarpplays
an important role in the results. The vert ical
position affects the shape of the vortex, and
the horizontal position determines its location.
If you want the p articles to spiral around the
particle emitter, place both at the same location.
Interfa ce