On Thu, Dec 5, 2019 at 7:30 AM Thorsten Behrens <[email protected]> wrote:
> Hey Chris, > > Chris Sherlock wrote: > > I’m trying to work out how to implement the SETMETERLIMIT EMF record. > > > > Can anyone point me to the spot where we implement bevelling? > > > We discussed on IRC earlier this week, below the log for reference - > did that solve the question for you? > > chris_wot: thorsten! hey, can you help me out? > chris_wot: do you know what does line mitering? > chris_wot: is it in basegfx? > quikee[m]: the vcl polyline accepts miter limit as an parameter > thorsten: yep, fwict the method noelgrandin gave does that > ***chris_wot relooks at the code > chris_wot: you mean basegfx/source/polygon/b2dlinegeometry.cxx ? > thorsten: yep > chris_wot: thorsten how do I set the miter limit though? > thorsten: chris_wot: see vcl/headless/svpgdi.cxx: // convert miter > minimum angle to miter limit for how to convert between the two related > ways to express that > chris_wot: legend > chris_wot: thorsten is it the line double fMiterLimit = 1.0 / sin( > fMiterMinimumAngle / 2.0); > chris_wot: as I want to do this indepently of the angle > chris_wot: which is what SETMITERLIMIT does... > chris_wot: thorsten something like this - > https://www.partnersoftware.com/documentation/MP/v4.5.26/mp_wblegendlinestylemiterlimit.png > thorsten: chris_wot: indeed, that's the concept > > Cheers, > > -- Thorsten > That was helpful, but it didn't tell me how to get the meter limit independently of the angle. I think that I will need to probably to add another miter limit parameter to createAreaGeometryForJoin() and then introduce an isosceles trapezoid instead of a triangle for the miter. This is because you can actually specify the miter length, however, the example given doesn't show how just call on a basegfx function to produce a bevelled join based on the miter length itself - I did look for something that handles this but couldn't find anything. Chris
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