Does anyone know how to perform CSG operations on flat objects.
I would like to do the following;

     difference{
          triangle {<0.7,0,1.6>,<-0.7,0,1.6>,<0,2.9,5.7>}//C
          triangle {<0.2,1.9,4.3>,<-.2,1.9,4.3>,<0,2.85,5.65>}  //front
cockpit
     }

and get the first triangle with the second cut out of it.

I think that the problem is that the two triangles are not coplanar.  Is

there any way to force this operation without having to recalculate the
second triangle to make it coplanar with the first? I have to do this
for about 70 triangles, and it sure would save time.

Thanks

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