Scripting Guide - SAS

Chapter 13 Three-Dimensional Scenes 443
Graphics Primitives
Size and Width
To set the point size of rendered objects, use the Point Size command.
Point Size (n)
where n is the number of pixels. Note that this might not be the actual number of pixels rendered,
depending on other settings such as anti-aliasing and your hardware configuration.
Set the line width using the Line Width command
Line Width(n)
where n is the number of pixels. The argument n must be larger than zero and is, by default, one.
Stippling Pattern
To make stippled lines, use the Line Stipple command.
Line Stipple(factor, pattern)
Factor is a stretching factor. Pattern is a 16-bit integer that turns pixels on or off. Use
Enable(LINE_STIPPLE) to turn the effect on.
To construct a line stippling pattern, write a 16-bit binary number that represents the stippling pattern that
you desire. Note that the pattern should read from right to left, so your representation might seem backward
to the way it is rendered. Convert the binary number to an integer and use this as the pattern parameter.
For example, imagine you want the dotted line pattern 0000000011111111. This is equal to 255 in decimal
notation, so use the command Line Stipple(1, 255).
The factor parameter expands each binary digit to two digits. In the example above, Line Stipple(2,
255) would result in 00000000000000001111111111111111.
For example, the following script draws three lines, each of different widths (the Line Width commands)
and stippling patterns.
// make a scene box...holds an OpenGL scene.
scene = SceneBox( 200, 200 );
// put the scene in a window.
New Window( "Stipples", scene );
scene