Quantum Data 802BT, User Manual

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360 Appendix A Command Reference
GRIV
draw a GRIll pattern of Vertical lines
Class Custom image primitive
Description Draws equally spaced vertical lines that form a grill over the entire active video area. The
gaps are not touched and will show any previously drawn primitives. The primitive uses
three parameters. The first is the color of the lines, the second is the thickness of the lines,
and the third is the thickness of the space between the lines.
Command syntax GRIV color line_width space_width
color
available colors
line_width
number of pixels in line
space_width
number of pixels in space
Other required
commands
The FMTU command instructs the generator to use the new settings. The ALLU command
updates the hardware to the new settings and redraws the test image.
Example
GRIV cyan 16 16 // Draw cyan grill with 16-pixel lines
// and 16-pixel spaces
ALLU // Update hardware to current buffer contents