In article ,   
   Hans Bezemer   wrote:   
   >On 29-01-2025 19:49, Buzz McCool wrote:   
   >> On 1/18/2025 7:52 AM, Hans Bezemer wrote:   
   >>> Ever tried to create a graphics library - only to find that even   
   >>> drawing a simple line requires a degree in mathematics? What if I tell   
   >>> you you can make a fully fledged graphics library in less than 200   
   >>> lines, providing high quality vector graphics files which can be used   
   >>> in a plethora of application programs?   
   >>>   
   >>> https://youtu.be/_MKFQIHm_ss   
   >>   
   >> Hans -   
   >>   
   >> I believe you said in passing that you didn't like PostScript, but   
   >> didn't elaborate. Just curious if you have any detailed comments about   
   >> using PostScript for graphics.   
   >   
   >Not really. It was actually as brief as I described in the video. Didn't   
   >feel like I could quickly get that one going, so I moved to the next   
   >option. And yes, I immediately fell in love with SVG.   
   >   
   >Of course I don't think it's impossible to get things going in PS, the   
   >question is - how much time do I want to put into it? Especially if I   
   >got the functionality of vector graphics covered.   
      
   I did some programming almost directly in PostScript (Rotterdam Harbour)   
   I could draw the harbour almost directly from the sql database that contains   
   the boundaries between water and land. PostScript did not mind that   
   there are details that are contained in one pixel.   
   I produced maps where the color was indicative how much chance you got from   
   being killed by a disaster involving chemicals on ships. Also maps where a   
   toxic waste distribution was colored in.   
   It was relatively easy to use real coordinates, using a matrix multiplication   
   to generate  paper coordinates.   
   Some maths required but no too much.   
      
   Having some pipes to a display postscript terminal could be the easiest   
   way to get graphics done in Forth.   
      
   dislin looks attractive too. The python examples could be realitively   
   easy to convert to wina using dll interface, with regexp transformation.   
   Apparently all windows examples links to dislin.dll.   
   The wina examples then directly call the dll's.   
      
   Mnemonics tables using postscript are part of ciasdis.   
    The advantage that you   
   could have a mnemonic  movi with hex code 8F and draw it in place   
   row 8 column F with bother for the order.   
   If you have double assigned mnemonics, or holes, that is apparent.   
      
   I recently made illustrations of how to draw sine and calculate pi for   
   a Forth lecture. Some time ago illustrations for continued fractions,   
   where points in a grid show a rational approximation.   
      
   Quite fond of PostScript and it has the reverse polish mindset.   
      
   >   
   >Hans Bezemer   
   >   
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