Functional PostScript Tutorial

Style

You can control how the paths get turned into picture by specifying the style used by picture makes. A style is a collection of attributes, where attribute is a piece of information about the picture: color, line width, etc.

There are several ways to change or specify style and attributes. The simplest way is to include the attribute as an argument to the picture makers:

	(define thick-triangle-picture
	   (stroke triangle-path (:line-width 10)
			         (:color (rgb 1 0 0))))

We have changed the line-width attribute from the default value of 1 to 5, and the color attribute from the default black to red (rgb creates a color in the red/green/blue model. More on color in the next section) so the resulting picture is painted in a thick red line.

Related procedures in this section:
build-style, vary-default, with-style, with-attrib,
attributes

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