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Starlink / ast

Starlink AST Library
GNU Lesser General Public License v3.0
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tick artifact when using very large line width #4

Closed duidae closed 5 years ago

duidae commented 5 years ago

hi: currently we are using AST for rendering coordinate systems, really a great library, thanks for your effort! However we met a problem which is the tick artifact when using very large line width. I wonder why is there a strange triangle after the rectangular tick? Hope there could be a fix for this, thanks again!

ticks

dsberry commented 5 years ago

That looks very much like it may be a problem in the Grf module that AST uses for drawing its primitive graphics (see "Choosing a Graphics Package" http://www.starlink.ac.uk/docs/sun211.htx/sun211se21.html#x22-21100015). Are you using a standard Grf module or have you written your own?

duidae commented 5 years ago

wow thanks for the feedback! I'll check it first, thanks again!

duidae commented 5 years ago

hi @dsberry we found the problem & it's actually caused by our customized grf function, so really appreciate your help! thank you & ast library again!