[GRASS-dev] Re: [GRASS GIS] #250: ps.map: new parameter to set line cap style of vector lines

[GRASS GIS]

#250: ps.map: new parameter to set line cap style of vector lines
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  Reporter:  alf          |       Owner:  hamish                     
      Type:  enhancement  |      Status:  assigned                   
  Priority:  major        |   Milestone:  6.4.0                      
 Component:  ps.map       |     Version:  svn-develbranch6           
Resolution:               |    Keywords:  line cap style vector round
  Platform:  All          |         Cpu:  All                        
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Changes (by hamish):

  * cpu:  x86-32 => All

Comment:

 I had a look to do a similar thing with the region instruction, which is
 currently drawn as a series of individually stroked lines which do not
 connect and look ugly if line width is set thick. These lines are plotted
 using the do_plt.c plotting instruction tmp file.
 It can't be passed as a rectangle plot instruction as it subdivides the
 horizontal line into three sections in case the region goes the long way
 around a LL world.

 I expect the easiest solution for the (sub)region box will be to put PS
 writing code directly into r_wind.c, but I worry that that code is
 executed before the main ps.map box is calculated and rendered.

 So as a second solution for that- perhaps we should add a "Y" polyline
 instruction to the do_plt.c set of internal drawing commands.  ??


 As for the main wish, I am still waiting on any feedback wrt the level of
 control we should provide before applying the patch.


 Hamish

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Ticket URL: <http://trac.osgeo.org/grass/ticket/250#comment:4>
GRASS GIS <http://grass.osgeo.org>