RE: [Flightgear-devel] Slope of a triangle

[Norman V. <nh...@ca...>]

David Megginson writes:

>Does anyone have a quick formula for calculating the slope of a
>triangular plane in the XYZ coordinate space, relative to the z axis?
>I know it cannot be that tricky, but I'm not much of a geometry guy.

Not sure what you mean by 'slope'
ie with respect to what ??

FYI there is code in PLib for most 'Plane' operations
several sgMakePlane() variants in sg.h

Cheers

Norman