GRASS VALLEY Kayenne XL Package, Руководство пользователя

Страница: 60 / 624

60 Kayenne XL Package — User Manual
Section 2 — Concepts
Rotate
Picture rotation about the reference axis in the X, Y, and Z dimensions
(
Figure 23 ). Rotate is limited to ± one half revolution, and will always take
the shortest path to the new position. Rotate uses Quaternion mathematics
to calculate the move with increased accuracy. Multiple rotations are per-
formed with the Spin function.
Figure 23. Rotate
Spin
Supports multiple rotations about the reference axis in the X, Y, and Z direc-
tions. Spin supports fractional values, and is similar to Rotate when the
move is less than ± one half revolution. Spin uses Euler mathematics to cal-
culate the move, which is not quite as precise as Quaternion, but permits
multiple 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 24. Aspect, Skew, Perspective
Aspect
Scaling the X or Y components of the picture. X axis changes affect hori-
zontal size, Y axis changes affect vertical size (
Figure 24 ). Z axis changes
affect both X and Y dimensions, and is the same as Size.
0865_12_r1
Y
Z
X
Y
Z
X
Y
Z
X
X Rotate
(Around Y Axis)
Y Rotate
(Around X Axis)
Z Axis Rotate
0865
11
Y
Z
X
Aspect
Y
Z
X
Skew
Y
Z
X
Perspective