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Placing Motions on the Motion Flow Graph 1027
man y parameters to simulate moving crowds
and incorporates collision detection, surface
follow and other parameters. The delegate–driven
method uses a network of clips, but instead of
random selection. it bases clip selection on a
delegate’s speed and heading. In a delegate–driven
crowd simulation, clips are ar ranged to follow a
logical sequence. For example, the first clip could
beastartwalkclip,thenawalkloop,thenabranch
toaturnrightandturnleftclip,thenaslowto
stop clip and so on. Dur ing motion synthesis, this
arrangement is used to pick clips. If the software
senses a collision ahead, the slow to stop clip is
selected, or a veer to avoid clip is chosen. For
a detailed breakdown of delegate driven crowd
behavior, see Crowd Animation (page 2–1154) .
Pl acing M otions on the M otion
Flow Gr a ph
The Motion Flow Graph (page 2–1045) contains the
tools you’ll use to add clips to the dialog window,
calculate optimized transitions, set random script
transition values, move and delete clips, and
display clip dependencies. Clips display as icons
and tr ansit ions appear as arrows in the Motion
Flow Graph.
The Motion Flow Graph displays when you click
Show Graph on the Motion Flow rollout (page
2–1045) on the Motion panel.
Motion Flow G raph
The first step in Motion Flow mode is to add clips
in the Motion Flow Graph for use in scripts. Clips
represent all or part of a .bip file. Transitions
represent different paths through the clips in the
Motion Flow Graph. A transition looping back to
thesamecliprepresentsacycleorloop.
If a biped is using a shared motion flow, then the
titleofthegraphdialogsays"SharedMotionFlow
Graph", followed by the name of the shared motion
flow. Shared Motion Flows are used to control
multiple bipeds with one shared motion flow .
TherearetwowaystocreateclipsintheMotion
Flow Graph (page 2–1045). The first method lets
you create a blank clip to which you later assign
a .bip file. The second method lets you create
multiple clips at once by choosing a several .bip
files at once.
Procedures
To create clips in the Mot ion Fl ow Gr aph:
1.
Select a biped
2. Open the Motion panel.
3. Click Motion Flow Mode on the Biped
rollout.
4. On the Motion Flow rollout, click the
ShowGraphbuttontoopentheMotionFlow
Graph.
5. On the Motion Flow Graph toolbar, click
Create Clip
6. Click a few t imes inside the Motion Flow Graph
dialog.
Clip icons will appear in the Motion Flow Graph
(page 2–1045) that are named clip1, clip2 and
so on.
7. On the Motion Flow Graph toolbar, click
Select Clip/Transition.