How to get the vector from a Point orthogonal to a Vector

I have three points A, B, C Now I have built the vector A-B. What I need now, is a vector from C which is orthogonal to the vector A-B. The Vector (vecX) has to point to from C to the vector A-B. What I did this:

%vecX = abs(cross(A - B, C - A))./(A - B);

But I thiks this givs me onle the disctence from C to A-B and not the direction. Do you have any ideas how I can solve the problem? Thank you!

Answer 1

[Torsten]

x=(A-C)-dot(A-C,A-B)/dot(A-B,A-B)*(A-B)

Best wishes

Torsten.

[Oliver Kumar]

Thanks Torsten!