Adding calculation of area about freewake HOT 8 CLOSED

a few ways to do this. I can calculate the panel areas and add them up, and also calculate the projected panel areas and add them up. These values will not change with camber or flap deflection.

We can also add up the DVE element areas. Those values would change with camber, and the projected areas would change with flap deflection.

Also, what will these values be used for? for example, what if we want to non-dimensionalize to just the wing area and not include the tail? how will the user approach this?

I think panel areas are not quite the projected areas when the panels have dihedral.
projected area is related to induced drag and exposed/wetted area is of value when judging profile drag. This latter area could be computed by just adding the DVE areas.
Let's compute the areas, store them, but for now continue to use info.S input for nondimensionalizing.

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I think I can calculate:
-total panel area = global panel span * panel chord
-projected area = y component of global span * (chord *cos(eps))
-surface area = sum of DVE area

Do we want it stored on a panel basis, or total for all panels added up?

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ok, I think the best place to do this is in surface_dve_geometry. This happens just after the vehicle is rotated for roll / alpha, and just before camber / flap deflection. However, the panel and info struct are constants in the function, do they have to be?

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added in 012fb04

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if this is acceptable in the output files, we can close

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