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3 In the Surface Follow Behavior rollout, click None or Multiple
Selection to designate the object or objects whose surface(s) the assignees
are to follow.
4 If you like, use the settings in the Projection Vector group to force
delegates to move in a specific direction.
Obstacle Avoidance
An important part of crowd behavior is avoidance of obstacles. Think of an
obstacle as anything that impedes a crowd member's progress. Examples of
obstacles include walls, telephone poles, and fences, as well as other crowd
members. Encountering such objects can cause avoidance behavior, which
consists of any combination of slowing down, turning, and stopping.
There are several ways to implement avoidance in character studio, including:
The
Avoid behavior on page 4867 is one of the most commonly used
behaviors. Use this behavior to cause crowd members to avoid other crowd
members, or spherical objects in the scene. It works by creating a spherical
volume of avoidance around the avoided object, so it doesnt accommodate
irregular objects.
The Avoid behavior is unlike any other behavior in Crowd. After all the
other behaviors exert their forces on the delegates, Avoid takes over and
has the power to turn, slow down, and even stop a delegate in order to
make it avoid an obstacle.
Use the
Wall Repel behavior on page 4895 to cause crowd members to avoid
broad, flat objects such as walls and fences. You can set a maximum
distance for the repel effect, and describe the rate at which the force away
from the wall increases as a delegate approaches the wall.
Unlike the Avoid behavior, which can stop or slow down a delegate, Wall
Repel simply exerts a force on the delegate to turn it away from the wall.
It does not guarantee wall avoidance. You must work with its distance
and falloff parameters, as well as its weight in the Assignments and Teams
dialog, to control its strength.
Use the
Repel behavior on page 4880 to cause crowd members to turn away
from an object. It works exactly like Wall Repel except that it uses a
spherical volume rather than a plane. You can set a maximum distance
for the repel effect, and describe the rate at which the repel force increases
as the delegate approaches the obstacle.
4780 | Chapter 17 character studio