Hamish wrote: > > One of the main areas where this is relevant is if we want translucent > > layers. It's possible to simulate translucency in PostScript using > > pattern fills, but you need to be careful when selecting the grid > > (frequency, phase, orientation) or else you can get artifacts. > > Older versions of Surfer (the commercial 3D surface rendering program) that I > have used do that for area fills- shades of grey are many dots of varying > density. The PS output is a massive file which takes a silly amount of time to > render in gv and is generally an all-around PITA to work with. (meant as an > anecdote, not as a condemnation of the approach)
That's just Surfer generating bad PostScript; it's probably "capturing" its rendering at a low level, resulting in vast numbers of individual "dots" being stored in the stream. Level 2 PostScript supports a pattern "colour space", which allows you to use a pattern as the fill colour. However, this can't be used for painting images (this may be related to the similar restriction for PDF; it would be interesting to see the PostScript generated when printing such a PDF). -- Glynn Clements <[EMAIL PROTECTED]> _______________________________________________ grass-dev mailing list grass-dev@grass.itc.it http://grass.itc.it/mailman/listinfo/grass-dev
