6.1.1 Individual attributes
Graphic attributes are optional arguments of the
form display=value, they must be given
as the last argument of a graphic instruction. Attributes
are ordered in several categories: color, point shape, point width,
line style, line thickness, legend value, position and presence.
In addition, surfaces may be filled or not, 3-d surfaces
may be filled with a texture, 3-d objects may also have properties
with respect to the light.
Attributes of different categories
may be added, e.g.
Colors display= or color=
black, white, red, blue, green,
magenta, cyan, yellow,
- a numeric value between 0 and 255,
- a numeric value between 256 and 256+7*16+14 for a color of the
- any other numeric value smaller than 65535, the rendering
is not guaranteed to be portable.
- Point shapes display= one of the following value
rhombus_point plus_point square_point cross_point
triangle_point star_point point_point invisible_point
- Point width: display= one of the following value
point_width_n where n is an
integer between 1 and 7
- Line thickness: thickness=n
or display=line_width_n where n is an
integer between 1 and 7 or
- Line shape: display= one of the following values
dash_line solid_line dashdot_line dashdotdot_line
cap_flat_line cap_square_line cap_round_line
- Legend, value: legend="legendname";
position: display= one of
quandrant1 quadrant2 quadrant3 quadrant4
corresponding to the position of the legend of the object
(using the trigonometric plane conventions).
The legend is not displayed if the attribute
display=hidden_name is added
- display=filled specifies that surfaces will be filled,
- gl_texture="picture_filename" is used to fill
a surface with a texture.
Cf. the interface manual for a more complete
description and for gl_material= options.