9

Behaviors 915
Behaviors
In crowd animation (page 2–1154) ,behaviors
simulate a range of activities. Seek, avoid, path
follow, surface follow, repel, orientation, scripted,
space warp, surface arrive, wall repel, wall seek,
and w ander are all b ehaviors available i n a crowd
simulation.
Behaviors let you assign procedural ac t ivity ty pes
to delegates and objects link ed to delegates. You
can associate any number of behaviors with each
Crowd object, and then link delegates and teams
ofdelegatestoeachbehavior.Aspecificbehavior
assigned to a Crowd object belongs only to that
crowd; it cannot be assig ned to any other crowds.
B end Li nk s
Bend Links Mode active (left) and Bend Links Mode inactive
(right)
WhenyouturnonBendLinksMode(ontheBend
Links rollout (page 2–952)), rotating a single chain
link causes the other links to bend following a
natural c urvature. When Bend Links Mode is off,
rotating one link rotates all its children links by
thesameamount.
Tip: Bend Links works well on the biped spine,
neck, tail and ponytail links.
Bezier Curve
Bezier curve and the control points and tangent vectors about
each vertex
A curve mo deled using a paramet ric polynomial
technique. Bezier curves can be defined by many
vertices. Each vertex is controlled by two other
points that control the endpoint tangent vectors.
Bezier curves were developed by P. Bezier for
computer modeling in automobile design.
A vertex on a Bezier Curve affects the entire curve
in that area. Compare with B-splines (page 3–913),
where the control vertices (CVs) affect only their
local region of the curv e or surface.
Asegmentonaneditable spline (page 1–297) that
has its vertices set to Bezier or Bezier Cor ner is
considered a Bezier Curve.
B ioVision Fil es
TheBioVision™fileformatstoresmotion-capture
information. A BVH file contains the "actor ’s"
skeletal and limb/joint rotation data, and uses the
.bvh file name extension.
Note: FortheBVHfilespecification,seethe
BVH.rtf document on the program disc.