View Full Version : Union of overlapping polygon projections

04-09-2009, 06:39 AM
Hey OpenGL users,

I am not an OpenGL user and have only worked with creating graphics with the inventor library. I am yet to find a way to solve my problem. Perhaps someone here can help me.

I want to know if there's any tool within the OpenGL library for projecting two or more polygons onto a given plane, and then extracting a spatial dataset of the overlapping area of these projections.

I am investigating the effect of shading in fields of solar concentrators in order to optimise the array configuration. Any help would be greatly appreciated.



Ilian Dinev
04-09-2009, 06:48 AM
OpenGL draws stuff, doesn't do maths for you.

04-10-2009, 03:24 PM
Not sure what you mean by 'extracting a spatial dataset'? I can think of 3 things you might want: 1) a visual representation of the planar intersection of the projections (this would be 2D), 2) the actual area of this intersection (a number), or 3) a description of the intersection as a 2D polygon (probably concave). #3 would be vertices with coordinates and how they are connected.