Non-zero lift at zero angle of attack causes discontinuous lift when shifting from positive to negative AOA

[brihernandez]

Wings don't actually ever use the negative side of the lift curve because angle of attack lookup is always done with a positive number. This is why when wings have a nonzero lift at angle 0, it creates discontinuities.

This can be worked around by making a wing that creates zero lift at 0 degrees, but is set on the plane at some positive angle.

[josephsipos]

Another solution is to have a minAngleOfAttack. And if the angleOfAttack goes bellow it then set it to that number. That way the wing will always have lift at minAngleOfAttack.

angleOfAttack = Vector3.Angle(Vector3.forward, localVelocity);
if (angleOfAttack < minAngleOfAttack)
{
	angleOfAttack = minAngleOfAttack;
}`

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