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(INTENSITY value) |(STYLE value) | (WIDTH value)
If a variable name or a coordinate point (x,y,z,h) is given, draw a
line from the current point to the indicated position, making it the
new current point, using either absolute or relative coordinates,
according to the optional second keyword. If the second keyword is
omitted, ABSOLUTE is assumed. The keyword LINE may be abbreviated to a
single letter because of its heavy use.
If the INTENSITY keyword is given, it must be followed by a value in
the range 0.0 .. 1.0 to set the line intensity for further plotting. A
value of 0.5 corresponds to the display device's normal intensity. It
is not possible to simulate this feature, so it is only useful on CRT
and film displays which can support it in hardware.
If the STYLE keyword is given, it must be followed by an integer value
defining the style number. Line style 1 is a solid line, styles 2..9
are different built-in dashed line patterns. Larger style numbers
encode patterns in their decimal digits, as follows:
----------- ------------------------------
Digit Value Line Segment
----------- ------------------------------
0,1 point (invisible,visible)
2,3 very short (invisible,visible)
4,5 short (invisible,visible)
6,7 medium (invisible,visible)
8,9 long (invisible,visible)
----------- ------------------------------
For example, line style 5494 selects a pattern of the form (short
visible, short invisible, long visible, short invisible), or
-- -------- -- -------- -- -------- -- -------- etc.
If the WIDTH keyword is specified, it must be followed by a value in
the range 0.0 .. 1.0 which sets the default line width for all further
plotting. On most display devices, line width is simulated by drawing
multiple parallel strokes for each line segment. The value 0.0 is the
default normal width, and each increment of 0.05 adds an extra stroke,
up to a maximum width of 1.0.