koobas.hobune.stream
Find rotation between up and two vectors
Hi guys,
this one's probably really simple and I'm just being dense but I need to find the gradient of a line between vector a (Xa, Ya) and vector b (Xb, Yb). I need to instantiate a game object with the rotation which is consistent with the line that runs from point A to B. I need to find the gradient as degrees so I can apply the rotation to the Z axis of my GameObject so as 0 is vertically up, 45 is up-right, 90 is right etc.
I think I'm just being dense but any help would be appreciated.
Thanks!
I'm not entirely sure if I've got you right but if you are looking to find the angle that the line segment makes on a 2D plane with an axis you can make a triangle out of the change in X coordinates for a side, and the Y, and then use the tangent of the opposite side over the adjacent to find the angle.
That's what I was doing but It was only working for me between 0 and 90 degrees.
public Vector3 findRotation(Vector3 a, Vector3 b) { float x, y, rot; x = a.x - b.x; x = $$anonymous$$athf.Sqrt(x * x); y = a.y - b.y; y = $$anonymous$$athf.Sqrt(y * y); rot = $$anonymous$$athf.Rad2Deg * $$anonymous$$athf.Atan (x / y); Vector3 rotation = new Vector3 (0, 0, rot); return rotation; }
obviously when I get beyond 90 degrees that becomes an issue and it just calculates it as if it were between 1-90 again.
nvm I don't know why I was making the x and y values positive :') so dense.
