Apple Motion 5.1.1 - Manual (Page 914)

Chapter 21 3D compositing 914
•
Adjust Around: A pop-up menu, located under the Move, Rotate, and Scale controls in the HUD,
that sets which relative coordinate space to use for transforms. The Adjust Around pop-up
menu has three options:
•
Local Axis: The default, this option orients the onscreen transform controls to the object’s
local axes.
•
World Axis: This option orients the onscreen transform controls to the axes of the 3D grid in
the Canvas.
•
View Axis: This option orients the onscreen transform controls to the view space of the
current view. The Z axis is aligned along the view’s line of sight. For more information on
views, see
3D workspace and views overview on page 918.
Relative coordinates
To better understand the concept of relative coordinates, think of a system of satellites, like the
earth, the moon, and the sun. The moon’s parent is the earth, and the earth’s parent is the sun.
Usually, when considering these three bodies, the moon’s position is described in terms of its
position relative to the earth (the moon’s parent), and the earth’s position is described relative to
the sun (the earth’s parent). In Motion, an object’s position and orientation are always relative to
its parent.
When you add a group to a Motion project, that group is created at the origin coordinates of
its parent. In the case of a root-level group (a group that is not nested inside other groups in
the Layers list), the parent is the project itself. An object placed inside a group has its position
described relative to its parent—the group.
Group position set to 100,100,100
In the example above, a group is positioned at X, Y, and Z coordinates of 100, 100, and 100,
respectively. The group is located 100 pixels away from its parent’s origin on all axes (the parent
in this case being the project itself). The image inside the group is positioned at 0, 0, 0. Because
the image’s position is relative to its parent, the group, it shares its parent’s origin and has an
apparent position in the world of 100, 100, 100.
67% resize factor