Grass Valley Kalypso User Manual V.15.0 - Manual (Page 110)

110 Kalypso — User Manual
Section 2 — Concepts
Figure 86. Rotate
Spin — Supports multiple rotations about the reference axis in the X, Y, and
Z directions. Spin supports fractional values, and is similar to Rotate when
the move is less than ±. one half revolution. Spin uses Euler math to calcu-
late the move, which is not quite as precise as Quaternian, but permits mul-
tiple rotations. Spin applies transform values in Z, X, Y order, so editing
effects in this axis order provides the best control of the effect.
Note Following broadcast conventions, moving the Joystick forward or back along
the Joystick’s Y axis rotates the top of the picture forward or back (a rotation
about the X reference axis). Similarly, moving the Joystick left or right along
the Joystick’s X axis rotates the side picture left or right (a rotation about the
Y reference axis).
Figure 87. Aspect, Skew, Perspective
Aspect — Scaling the X or Y components of the picture. X axis changes affect
horizontal size, Y axis changes affect vertical size ( Figure 87 ). Z axis
changes affect both X and Y dimensions, and is the same as Size.
Skew — Slanting the picture in the X (horizontal) and Y (vertical) directions
( Figure 87 ).
Perspective — Changing the viewer’s apparent viewpoint of a picture. This
only applies when a picture is tilted so part of it is farther from the viewer.
The farther portion appears smaller than the closer portion, and the
amount of perspective controls how much smaller the distant part is
(
Figure 87 ). Multi-channel perspective is discussed later in this section.
Y Rotate
(Around X Axis)
Z Axis Rotate
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Y
Z
X
X Rotate
(Around Y Axis)
Y
Z
X
Y
Z
X
Aspect Skew Perspective
Y
Z
X
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Y
Z
X
Y
Z
X