Re: rasterarray border?
- To: mathgroup at smc.vnet.net
- Subject: [mg56039] Re: rasterarray border?
- From: "Jens-Peer Kuska" <kuska at informatik.uni-leipzig.de>
- Date: Thu, 14 Apr 2005 08:54:33 -0400 (EDT)
- Organization: Uni Leipzig
- References: <d3ia99$9jj$1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
Hi, you need a line/circle drawing algorithm that work on the RasterArray[], look in the standard text books on computer raster graphics for "Bresenham Line-Drawing" Regards Jens "Manuel Marques-Pita" <m.marques-pita at ed.ac.uk> schrieb im Newsbeitrag news:d3ia99$9jj$1 at smc.vnet.net... > hello, > > I am drawing a rasterarray in which I need to > draw a border/stroke round > some of the elements in the array (all the ones > != -1 below). > > Show[Graphics[RasterArray[von /. > {-1 -> RGBColor[1, 1, 1], > 0 -> RGBColor[0.97, 0.97, 1], > 1 -> RGBColor[0.3, 0, 0], > 2 -> RGBColor[1, .78, .78]}]], > AspectRatio -> Automatic]; > > I haven't found a way to do this yet, any > ideas/suggestions? > > Thanks in advance! > > Manuel >