Hi All
I have modified my the example that exposes the bug so that it works for
svg. Please find attached.
Advertising
Phil
On 17 September 2016 at 21:57, Phil Rosenberg <p.d.rosenb...@gmail.com>
wrote:
> Hi Arjen
> I'm just emailing to say that I have now got plplot to compile with
> wxWidgets support on Cygwin and I also find that it doesn't function. I
> will look into it once I get time.
>
> On 16 September 2016 at 15:32, Arjen Markus <arjen.mar...@deltares.nl>
> wrote:
>
>> Hi Phil,
>>
>>
>>
>> As a package, definitely.
>>
>>
>>
>> Regards,
>>
>>
>>
>> Arjen
>>
>>
>>
>>
>>
>> *From:* Phil Rosenberg [mailto:p.d.rosenb...@gmail.com]
>> *Sent:* Friday, September 16, 2016 4:25 PM
>> *To:* Arjen Markus; Alan W. Irwin
>>
>> *Cc:* plplot-devel@lists.sourceforge.net
>> *Subject:* RE: [Plplot-devel] Bug in notcrossed() function of plfill.c
>>
>>
>>
>> Hi Arjen
>>
>> I'm just trying to reproduce your Cygwin problems, but I can't get plplot
>> to build with wxWidgets on. Do you know if you installed wxWidgets as a
>> package or from source?
>>
>>
>>
>> Sent from my Windows 10 phone
>>
>>
>>
>> *From: *Arjen Markus <arjen.mar...@deltares.nl>
>> *Sent: *16 September 2016 08:08
>> *To: *Alan W. Irwin <ir...@beluga.phys.uvic.ca>; Phil Rosenberg
>> <p.d.rosenb...@gmail.com>
>> *Cc: *plplot-devel@lists.sourceforge.net
>> *Subject: *RE: [Plplot-devel] Bug in notcrossed() function of plfill.c
>>
>>
>>
>> Hi Alan, Phil,
>>
>>
>>
>> I tried Phil’s example on Cygwin – PLplot as built on my installation
>> does have a wxWidgets driver – but unfortunately that fails to run:
>>
>>
>>
>> *** PLPLOT ERROR, ABORTING OPERATION ***
>>
>> unknown error in plD_init_wxwidgets., aborting operation
>>
>>
>>
>> *** PLPLOT ERROR, ABORTING OPERATION ***
>>
>> unknown error in plD_bop_wxwidgets., aborting operation
>>
>>
>>
>> *** PLPLOT ERROR, ABORTING OPERATION ***
>>
>> unknown error in plD_line_wxwidgets., aborting operation
>>
>> …
>>
>> I then tried it with other drivers, but none demonstrated the sort of
>> problem Phil mentions (I did not quite expect that to happen, but it never
>> hurts to try).
>>
>> Regards,
>>
>> Arjen
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>> *Arjen Markus*
>> Sr. Adviseur/Onderzoeker
>>
>> T
>>
>> +31(0)88335 8559
>>
>> E
>>
>> arjen.mar...@deltares.nl
>>
>>
>>
>>
>>
>> [image: Logo] <http://www.deltares.com/>
>>
>> * www.deltares.com* <http://www.deltares.com/>
>>
>> Postbus 177
>> 2600 MH Delft
>>
>>
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>>
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>>
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>>
>>
>> Please consider the environment before printing this email
>>
>>
>>
>> > -----Original Message-----
>> > From: Alan W. Irwin [mailto:ir...@beluga.phys.uvic.ca
>> <ir...@beluga.phys.uvic.ca>]
>> > Sent: Tuesday, September 13, 2016 11:59 PM
>> > To: Phil Rosenberg
>> > Cc: Arjen Markus; plplot-devel@lists.sourceforge.net
>> > Subject: Re: [Plplot-devel] Bug in notcrossed() function of plfill.c
>> >
>> > On 2016-09-13 10:44+0100 Phil Rosenberg wrote:
>> >
>> > > On 13 September 2016 at 03:27, Alan W. Irwin <
>> ir...@beluga.phys.uvic.ca>
>> > wrote:
>> > >> There is a substantial testing requirement for fill changes. The
>> > >> reason for that is we have had years of mostly good user experience
>> > >> with the present fill algorithm so I feel it is important that
>> > >> anybody that changes the fill algorithm in any further way needs to
>> > >> demonstrate with substantial testing that their change does not
>> > >> introduce fill regressions.
>> > >>
>> > >> I have alluded previously to automated fill regression testing (for
>> > >> all our standard examples that directly or indirectly use fill and
>> > >> all our file devices). The core of the idea is to compare old and
>> > >> updated plot file results using imagemagick image differences. Do
>> > >> you agree this general approach (supplemented by actually looking at
>> the "fill"
>> > >> subset of our examples for each of our interactive devices) is the
>> > >> way forward to insure that our further fill changes do not introduce
>> > >> more issues than they fix?
>> > >
>> > > I think this is a good idea in general to avoid all sorts of
>> > > regressions.
>> >
>> > Good.
>> >
>> > > Would it be easier to use the svg output and diff as the svg examples
>> > > can be built on all systems?
>> >
>> > Presumably you are aware of this already, but it should be mentioned
>> that one
>> > issue with diff results is you cannot reliably compare results from two
>> different
>> > floating-point (FP) platforms because FP errors propagate to rounded
>> results on
>> > two such platforms in different ways. So it is essential to calculate
>> both the old and
>> > revised fill result with exactly the same FP platform (i.e., you cannot
>> store plot
>> > results from one FP platform to compare with plot results from other FP
>> platforms).
>> >
>> > Another issue with using diff even for the same FP platform is any
>> significant
>> > change in the fill code is likely to cause real differences, e.g., the
>> effective
>> > boundaries of the filled regions will be slightly different. In fact,
>> this is a problem for
>> > all fully automated methods I can think of to test for fill
>> regressions; there are going
>> > to be large local changes (as boundaries change slightly) in results,
>> but so long as
>> > the final result looks OK (i.e., no obvious holes in any fill region
>> and no significantly
>> > overfilled regions) then the change does not count as a significant
>> fill regression.
>> >
>> > As a result of this concern, I am now thinking along the lines of an
>> interactive script
>> > (i.e., not completely automated so it will be tiring to use unless we
>> are careful with
>> > the selection of what images to compare). At the heart of the script,
>> imagemagick
>> > would calculate the normalized difference of the old and modified image
>> results, and
>> > then simultanously display old, modified, and difference image results
>> to help
>> > evaluate by visual means (as opposed to fully automated means) whether
>> any
>> > significant regression has occurred. (Of course, for those cases where
>> the
>> > normalized difference image is zero, the script could simply skip the
>> visual
>> > comparison to speed up the comparison).
>> >
>> > I have mentioned imagemagick here because I am reasonably familiar with
>> it, and it
>> > is one of the primary collections of software that is used on Unix to
>> manipulate and
>> > display images. However, you should also note that imagemagick is
>> available as a
>> > binary download on Windows (see <http://www.imagemagick.org/sc
>> ript/binary-
>> <http://www.imagemagick.org/script/binary-%0b>> releases.php>).
>> > Furthermore, even though it appears not to be specifically packaged for
>> Cygwin
>> > such packaging has occurred for the MinGW-w64/MSYS2 platform so if the
>> generic
>> > windows binary download does not work, there is that other Windows
>> platform
>> > alternative to try as well.
>> >
>> > Alan
>> > __________________________
>> > Alan W. Irwin
>> >
>> > Astronomical research affiliation with Department of Physics and
>> Astronomy,
>> > University of Victoria (astrowww.phys.uvic.ca).
>> >
>> > Programming affiliations with the FreeEOS equation-of-state
>> implementation for
>> > stellar interiors (freeeos.sf.net); the Time Ephemerides project (
>> timeephem.sf.net);
>> > PLplot scientific plotting software package (plplot.sf.net); the
>> libLASi project
>> > (unifont.org/lasi); the Loads of Linux Links project (loll.sf.net);
>> and the Linux
>> > Brochure Project (lbproject.sf.net).
>> > __________________________
>> >
>> > Linux-powered Science
>> > __________________________
>>
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>
>
// Bar chart demo.
//
#include "plcdemos.h"
void
plfbox( );
const PLFLT xMin = 1980.;
const PLFLT xMax = 1990.;
const PLFLT yMin = 0.0;
const PLFLT yMax = 35.0;
//--------------------------------------------------------------------------
// main
//
// Does a simple bar chart, using color fill. If color fill is
// unavailable, pattern fill is used instead (automatic).
//--------------------------------------------------------------------------
int
main( int argc, char *argv[] )
{
int i;
char string[20];
PLFLT y0[10];
static PLFLT pos[] = { 0.0, 0.25, 0.5, 0.75, 1.0 };
static PLFLT red[] = { 0.0, 0.25, 0.5, 1.0, 1.0 };
static PLFLT green[] = { 1.0, 0.5, 0.5, 0.5, 1.0 };
static PLFLT blue[] = { 1.0, 1.0, 0.5, 0.25, 0.0 };
// Parse and process command line arguments
(void) plparseopts( &argc, argv, PL_PARSE_FULL );
// Initialize plplot
plinit();
pladv( 0 );
plvsta();
plwind( xMin, xMax, yMin, yMax );
plbox( "bc", 1.0, 0, "bcnv", 10.0, 0 );
plcol0( 2 );
pllab( "Year", "Widget Sales (millions)", "#frPLplot Example 12" );
y0[0] = 35-0.002818376; //this value makes max for this polygon y 2 plplot internal units less than the max y for the window
plscmap1l( 1, 5, pos, red, green, blue, NULL );
plcol1( 0.0 );
plpsty( 0 );
plfbox( );
// Don't forget to call plend() to finish off!
plend();
exit( 0 );
}
void
plfbox( )
{
PLFLT x[4], y[4];
PLFLT plXMin = 4587.;
PLFLT plXMax = 29900.;
PLFLT plYMin = 2867.;
PLFLT plYMax = 21708.;
PLFLT worldPerPlX = (xMax - xMin) / (plXMax - plXMin);
PLFLT worldPerPlY = (yMax - yMin) / (plYMax - plYMin);
x[0] = xMin + 14.0 * worldPerPlX;
y[0] = yMin - 6.0 * worldPerPlY;
x[1] = 1980. + 15.0 * worldPerPlX;
y[1] = yMin -4.0 * worldPerPlY;
x[2] = 1980. + 15.0 * worldPerPlX;
y[2] = yMin -2.0 * worldPerPlY;
x[3] = 1980. + 14.0 * worldPerPlX;
y[3] = yMin -1.0 * worldPerPlY;
plfill( 4, x, y );
plcol0( 1 );
pllsty( 1 );
plline( 4, x, y );
}
------------------------------------------------------------------------------
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