Individual attributes

### 8.3.1 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 combined with +, e.g.
plotfunc(x2+y2,[x,y],display=red+line_width_3+filled)

The graphic attributes are:

- Colors, set with display=value or color=value. The values can be:
  - 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 rainbow,
  - any other numeric value smaller than 65535, the rendering is not guaranteed to be portable.
- Point shapes, set with display=value. The values can be:
  - rhombus_point plus_point
  - square_point cross_point
  - triangle_point
  - star_point
  - point_point
  - invisible_point
  - Point width, set with display=value. The values can be:
    point_width_n where n is an integer between 1 and 7.
  - Line thickness, set with thickness=n or display=line_width_n where n is an integer between 1 and 7.
  - Line shape, set with display=value. The values can be:
    - dash_line
    - solid_line
    - dashdot_line
    - dashdotdot_line
    - cap_flat_line
    - cap_square_line
    - cap_round_line
  - Legend, the text is set with legend="legendname"; the position is set with display=value, where the values can be:
    - quadrant1
    - quadrant2
    - quadrant3
    - quadrant4
    and correspond 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.

  Examples.
  (See Section 13.10.3, Section 13.6.2, Section 13.3.3 and Section 13.7.3 for information on the commands used.)

  - Input:
    polygon(-1,-i,1,2*i,legend="P")
    Output:
  - Input:
    point(1+i,legend="hello")
    Output:
  - Input:
    color(segment(0,1+i),red)
    Output:
  - Input:
    segment(0,1+i,color=red)
    Output: