Grass Valley Kayak HD v.6.9.3 - Manual (Page 73)

Kayak — User Manual 73
3-D Digital Effects Concepts
Screen Coordinates
The Kayak Digital Picture Manipulator accommodates two different aspect
ratios, 4 x 3 and 16 x 9, selectable via the Video Standards menu. In 4 x 3
mode, the screen is six units high and eight units wide. In 16 x 9 mode, the
screen is 18 units high and 32 units wide. The numbering system begins in
the center of the screen, and has the standard horizontal X axis and the ver-
tical Y axis (
Figure 42 ). For simplicity, examples in this manual use the 4 x
3 aspect ratio.
These coordinates can be used for monitor screen locations (channel target
space with default global channel), or they can be applied to picture loca-
tions (channel source space).
Figure 42. Screen Coordinates
Screen units are also used to define Z axis dimension depth in 3-D space.
Positive Z axis values are back behind the picture, and negative values are
in front of the picture (
Figure 43 ).
Figure 43. Viewer Location in 3-D Space
0
+3Y
-3Y
+4X -4X
+9Y
-9Y
+16X -16X 0
0865_01
X
-Z
+Z
Target
Viewer - 16.67 S
cr een Units
+ 16.67 S
creen Units
0865_02
Source
Source