Code coordinates to match compass bearings

Question

Right now in Matlab (0,0) is the origin, 0 degrees / 2pi would be to the right of the cartesian plane and angles are measured counter clockwise with 90 degrees being at the top.

I'm trying to write a simulator where the coordinates would match a compass bearing. 0/360 degrees or 2pi would be at the top and 90 degrees would be on the right.

Any idea how to code in Matlab or c++? I'd imaging it'd be a matrix flipped about the x axis and rotated 90 degrees but I'm at a total loss.

Phil

Answer 1

You need do nothing more than swap x and y coordinates. This is a reflection in the line x=y. No need to use a matrix or anything. Just swap coordinates before using them. If you really insist on applying a matrix then

[0 1]
[1 0]

swaps x and y.