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8.4.3 translucent

Paints markers in a transparent version of their selected colour. The degree of transparency is determined by how many points are plotted on top of each other and by the transparency level. Unlike transparent mode, the transparency varies according to the average point density in the plot, so leaving the setting the same as you zoom in and out usually has a sensible effect.

Usage:

   shadingN=translucent colorN=<rrggbb>|red|blue|... translevelN=<number>

All the parameters listed here affect only the relevant layer, identified by the suffix N.

Associated parameters are as follows:

colorN = <rrggbb>|red|blue|...       (Color)
The color of plotted data.

The value may be a six-digit hexadecimal number giving red, green and blue intensities, e.g. "ff00ff" for magenta. Alternatively it may be the name of one of the pre-defined colors. These are currently red, blue, green, grey, magenta, cyan, orange, pink, yellow, black, light_grey, white.

[Default: red]

translevelN = <number>       (Double)
Sets the level of automatically controlled transparency. The higher this value the more transparent points are. Exactly how transparent points are depends on how many are currently being plotted on top of each other and the value of this parameter. The idea is that you can set it to some fixed value, and then get something which looks similarly transparent while you zoom in and out.

[Default: 0.1]


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STILTS - Starlink Tables Infrastructure Library Tool Set
Starlink User Note256
STILTS web page: http://www.starlink.ac.uk/stilts/
Author email: m.b.taylor@bristol.ac.uk
Mailing list: topcat-user@bristol.ac.uk