[osg-users] Draw open polygon

[Bruno Oliveira]

Hello,

How does one draw an open polygon using whether OSG API's or OpenGL
primitives?
I know how to draw, for instance, a filled rectangle, but how do I draw a
filled rectangle with a hole inside?

My data structures are stored as follows: a vector of the outward polygon's
vertices in clockwise order (e.g. filled rectangle), and then a vector of
"holes" stored as a vector of vertices in counter-clockwise order
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