#250: ps.map: new parameter to set line cap style of vector lines
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Reporter: alf | Owner: grass-dev@lists.osgeo.org
Type: enhancement | Status: new
Priority: major | Milestone: 6.4.0
Component: ps.map | Version: svn-develbranch6
Keywords: line cap style vector round | Platform: All
Cpu: x86-32 |
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Hello,
The code patch attached adds the 'cap' parameter to the vlines section of
ps.map, allowing to control the look of the ends of a vector line, or the
ends of the dashes in the case of a dashed line.
Three are the possible values: 'butt' (the default), 'round' for rounded
ends and 'extbutt' for extended butt ends. More detals are reported in
the updated documentation herein.
#250: ps.map: new parameter to set line cap style of vector lines
--------------------------+-------------------------------------------------
Reporter: alf | Owner: grass-dev@lists.osgeo.org
Type: enhancement | Status: new
Priority: major | Milestone: 6.4.0
Component: ps.map | Version: svn-develbranch6
Resolution: | Keywords: line cap style vector round
Platform: All | Cpu: x86-32
--------------------------+-------------------------------------------------
Comment (by hamish):
Hi,
patch looks good.
minor typo in docs: hald -> half line width.
Please break HTML at column 75-80.
maybe initialize linecap to -1 instead of testing to see if it is NULL.
(??)
before applying I'd like to hear ideas from the list on the added control
vs. lost simplicity aspects. also, any ideas on how best to implement
pattern=dashed and dotted? ("solid" is already there as an alias)
#250: ps.map: new parameter to set line cap style of vector lines
--------------------------+-------------------------------------------------
Reporter: alf | Owner: grass-dev@lists.osgeo.org
Type: enhancement | Status: new
Priority: major | Milestone: 6.4.0
Component: ps.map | Version: svn-develbranch6
Resolution: | Keywords: line cap style vector round
Platform: All | Cpu: x86-32
--------------------------+-------------------------------------------------
Comment (by hamish):
#250: ps.map: new parameter to set line cap style of vector lines
--------------------------+-------------------------------------------------
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: x86-32
--------------------------+-------------------------------------------------
Changes (by hamish):
#250: ps.map: new parameter to set line cap style of vector lines
--------------------------+-------------------------------------------------
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
--------------------------+-------------------------------------------------
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.