Radio Shack TRS-80 - Page 24

Computer Graphics Operation Manual
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CIRCLE (32~,l2~),9~,l,-6.2,-5
This statement draws an arc with a vertex ("origin") of
(32~,l2~) and radius of 9~. start is 6.2 and end is 5.
Radius lines are drawn for start and end.
CIRCLE (32~,l2~),9~,l,,-4
This example draws an arc with a vertex of (32~,l2~) and
radius of 9~. start is ~ and end is 4. A radius line is
drawn for end.
l~ PI=3.l4l5926
2~ CIRCLE (32~,l2~),l~~,l,PI,2*PI,.5
A semicircle is drawn.
l~ CIRCLE (l5~,l~~),l~~,l,-5,-l
2~ CIRCLE (22~,l~~),l~~,l,5,l
Two arcs are drawn with the same start and end point.
The arc with the negative start and end has two radius
lines drawn to the vertex. The arc with a positive start
and end has no radius lines.
CIRCLE (32~,l2~),l4~,,-4,6.l
This statement draws an arc with a vertex at (32~,l2~) and a
radius of l4~. Start is 4 and end is 6.1. A radius line
is drawn for start.
CIRCLE (32~,l2~),l4~,l,~,l,.5
This example draws an arc with a vertex of (32~,l2~) and
radius of l4~.
Sample Program
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