Commodore 128D - Page 257

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The graphics commands DRAW, BOX, CIRCLE, PAINT, LOCATE AND
GSHAPE have an additional notation which allows you to specify a
distance and an angle relative to the previous coordinates of the
pixel cursor (PC). The notation is as follows:
KEYWORD
where:
KEYWORD
SOURCE
DISTANCE
ANGLE
source, distance; angle
is a graphics command such as DRAW,
CIRCLE, PAINT, LOCATE, BOX or GSHAPE
is the same code as in all of the graphics
commands
is the number of pixels to move the pixel
cursor
is the number of degrees to move relative to
the previous pixel cursor coordinate
EXAMPLES:
CIRCLE1,160,100,65,10
CIRCLE1,160,100,95,50
CIRCLE1, 60,40,20,18,,,,45
CIRCLE1, 260,40,20,,,,,90
Draws an ellipse.
Draws a circle.
Draws an octagon.
Draws a diamond.
CIRCLE1, 60,140,20,18,,,,120 Draws a triangle.
CIRCLE 1, + 2, + 2,50,50 Draws a circle (two pixels down and
two to the right) relative to the
original coordinates of the pixel
cursor.
You may omit a parameter, but you must still place a comma in the
appropriate position. Omitted parameters take on the default values.
CLOSE
—Close logical file
CLOSE file number
This statement closes any files opened by the DOPEN or OPEN
statements. The number following the word CLOSE is the file number
to be closed.
EXAMPLE:
CLOSE 2
Logical file 2 is closed.
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BASIC 7.0 ENCYCLOPEDIA—Basic Commands and Statements