Support for Right-Handed Systems

[timbeaudet]

The AllowAxisFlip() is great for keeping the gizmo from flipping, 😛, but it doesn't show the right coordinate-system for right-handed systems.

Would need to allow user to specify an axis to negate, in my case would be Z, to show properly for right-handed.

[timbeaudet]

I was investigating making this change, and I found that changing directionUnary is the singular place it would need to happen, but that is const so a function that takes an index flip couldn't modify it.

void SetRightHandedAxis(int flippedAxis)
{
     directionUnary[flippedAxis][flippedAxis] = -1.0f;
}

Something like this is what I had in mind, though it requires that to be non-const and I don't think that would be a great first change without prior approval.

[timbeaudet]

Upon further testing that change alone wouldn't quite enough, something broke with rotations.

[CedricGuillemet]

it sounds reasonable to me to add a new accessors to set right or left hand.

[timbeaudet]

Any updates on that, I am curious if that will help the Y rotation flip/flop issue #294 which would basically be life saving.