GWBASIC User's Manual

GW-BASIC User's Guide
DRAW Statement
Purpose:
To draw a figure.
Syntax:
DRAW string expression
Comments:
The DRAW statement combines most of the capabilities of the other graphics statements into an
object definition language called Graphics Macro Language (GML). A GML command is a
single character within a string, optionally followed by one or more arguments.
The DRAW statement is valid only in graphics mode.
Movement Commands:
Each of the following movement commands begins movement from the current graphics position.
This is usually the coordinate of the last graphics point plotted with another GML command,
LINE, or PSET. The current position defaults to the center of the screen (160,100 in medium
resolution; 320,100 in high resolution) when a program is run. Movement commands move for a
distance of scale factor *n, where the default for n is 1; thus, they move one point if n is omitted
and the default scale factor is used.
Command Moves
Un up
Dn down
Ln left
Rn right
En diagonally up and right
Fn diagonally down and right
Gn diagonally down and left
Hn diagonally up and left
This command moves as specified by the following argument:
Mx, y Move absolute or relative. If x is preceded by a + or -, x and y are added to the
current graphics position, and connected to the current position by a line.
Otherwise, a line is drawn to point x, y from the current position.
The following prefix commands may precede any of the above movement commands:
B Move, but plot no points.
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