GRASS VALLEY Kayenne XL Package, User Manual

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Kayenne XL Package — User Manual 65
3-D Digital Effects Concepts
Screen Coordinates
The Kayenne XL Package 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 vertical Y axis (
Figure 31 ). 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 31. 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 32 ).
Figure 32. Viewer Location in 3-D Space
For perspective calculations the factory default viewpoint places the
viewer -16.67 screen units from the monitor screen surface (4 x 3 aspect
0
+3Y
-3Y
+4X -4X
+9Y
-9Y
+16X
-16X
0
0865_01
X
-Z
+Z
Target
Viewer - 16.67 S
creen Units
+ 16.67 S
creen Units
0865_02
Source
Source