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When you have more than one target, delegates initially move toward the
closest target in the group, and then move over its surface until they encounter
another target, at which point they switch to its surface, and so on.
Projection Vector group
These controls let you override the default direction calculated by the Surface
Follow behavior by describing a virtual plane along which the delegate is to
move. You do this by specifying a vector, in world coordinates, that's
perpendicular to the desired virtual plane.
For example, if you want the delegate, when it encounters a hill, to keep
moving forward, straight up and over the hill, instead of skirting it, you would
use the default Projection Vector settings: X=Y=0, Z=1. This vector is aligned
with the world Z (vertical) axis, so it specifies a plane parallel to the world XY
plane. Thus, the delegate always moves straight ahead while following the
surface.
Use Projection When on, Surface Follow calculates delegate direction from
the specified vector, rather than using the default.
X/Y/Z Specifies a vector using world coordinates. Default=X=Y=0, Z=1.
Range=-1.0 to 1.0.
If only one of these settings is not 0, then the projection vector is aligned with
the non-zero axis. Combine non-zero settings to create angled planes for
Surface Follow. For example, to create a virtual plane that's rotated 45 degrees
clockwise about world Y axis, set X=Z=1 and Y=0. Also, while you can set all
three axes to 0, that specifies no vector, and so effectively turns off Use
Projection.
Position on Surface group
Offset Specifies the delegate's distance above the surface, using the surface
normal. Recalculated at each frame.
Display Offset When on, shows the Offset distance as lines emanating from
each vertex in the surface object, perpendicular to the surface.
Color Swatch Shows the color used to draw the Surface Follow target (see
Display Target, next) during the solution. Click the box to choose a different
color.
Display Target When on, the interim goal for each delegate influenced by
the Surface Follow behavior is drawn in the viewports as a wireframe sphere
during the simulation solution.
4894 | Chapter 17 character studio