Chapter 2 Graphics Tutorial
2-2
Standard Graphics
The standard graphics mode provides a number of operators for constructing a variety of
filled shapes and lines. Using standard mode graphics, you can:
• Draw lines of any desired width
• Draw circles and rectangles
• Draw a variety of filled shapes, including boxes and arcs
• Draw pie charts
This is referred to as the standard graphics mode because it is a standard feature of all
versions of PRESCRIBE.
Drawing Lines
PRESCRIBE provides a number of Draw to commands for drawing lines in both stan-
dard and path modes. These include:
Lines to Absolute Position
Begin with a simple task such as drawing a line between two arbitrary points on a page.
Use the MAP and DAP commands to specify positions relative to the top and left mar-
gins.
This task has several distinct steps: selecting a line width, determining the starting point
of the line, and determining the end point of the line. The following command sequence
demonstrates this process.
!R! RES;
STM 0.5;
SLM 0.5;
SPD 0.01;
MAP 0.5, 1;
DAP 2, 0.5;
PAGE;
EXIT;
DAP (draw to absolute
position)
Draws a line to an absolute position in a Cartesian coor-
dinate system whose origin (0,0) is at the intersection of
the left and top margins.
DZP (draw to zero-relative
position)
Draws a line to an absolute position in a Cartesian coor-
dinate system whose origin (0,0) is at the intersection of
the left and top edge limits of the paper.
DRP (draw to relative position) Draws a line to a position specified as a horizontal and ver-
tical displacement from the current cursor position.
DRPA (draw to relative
position specified by angle)
Draws a line to a position that is specified as a distance and
angle from the current cursor position. Examples of these
commands are given in the sections that follow.
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