Markers, orientation and unit tests

[Darren S. <dsy...@gm...>]

I wondered if this project was still active and anyone monitoring the list?

I tried using the latest svgsharp library to load and render a diagram
created within Visio. Most of the diagram rendered cleanly (better
than firefox/chrome and Inkscape). However, arrows at the end of lines
had an incorrect orientation - they were rotated 90 degrees
anticlockwise. Reviewing the code I could see the marker orientation
calculated for marker-end adding 270 for the start angle which forced
an incorrect calculation for the marker angle to match the incoming
line. The unit tests are very explicit about angle calculations in
this area so I'm assuming that I don't understand the coordinate
system used or there are some other transformations occurring (or
should occur elsewhere).

I then tried a simple marker example and the library failed to render
this.  Checking the unit tests each of the marker examples in the unit
tests also failed to render.

I wondered if this was a known issue or if anyone had experienced this
in the past.


-- 
Darren