Autodesk LIGHTSCAPE, Руководство пользователя

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Animation 15
230
Lightscape
handles interactively. The Look At path represents the
direction in which the camera is oriented as it moves.
For information about editing the path, see “Editing a
Camera Path” on page 224.
You can also edit the speed at which the camera’s aim
moves along the Look At path with the Motion Editor.
For information, see “Varying the Camera Speed” on
page 231.
To set camera orientation using focus points:
1.
Select the keyframe(s).
2.
On the Path panel of the Animation dialog, select
At Point from the Look list.
A green focus point is placed at the origin for each
selected keyframe.
3.
To move the focus point, enable Pick, then click
on a surface in any orthographic view.
The focus point moves to the point you clicked on the
surface.
You can also enter specific coordinates for the focus
point in the X, Y, and Z boxes.
4. If necessary, modify the Look At path. For infor-
mation about editing the path, see “Editing a Camera
Path” on page 224.
Smoothing Out Camera Motion
Lightscape tries to smoothly interpolate the camera
orientation based on the camera orientation you
provide at each keyframe. If the camera orientation is
very different between sequential keyframes, the view
may not change smoothly.
To improve the smoothness of camera motion:
Try one of the following:
• Space the existing keyframes farther apart.
• Add additional keyframes between existing ones.
Changing the Camera’s Field of View
The direction the camera is facing at any particular
keyframe is established by the Look At position. You
can also modify the field of view or zoom factor for a
keyframe by:
• Adjusting the view parameters in the View Setup di-
alog
•
Zooming in or out using the zoom controls.
The field of view for all new keyframes is set, by
default, to the field of view specified by View Setup.
To change the camera’s field of view using the zoom
controls:
1. Click the Path tab in the Animation dialog.
2.
Set the View option to Keyframe.
3.
Click the Zoom button .
Selected keyframes (in red) and their corresponding focus
points (as represented by the straight green lines)
Focus point
Look At path
Look At direction for
selected keyframe
Camera path
keyframe
Pick option
Look list