   determining points in 3D space Question
    hi guys i have a point A(x,y,z) in 3D space and i have a direction vector . i need to get the coordinates of a point B(x2,y2,z2) that is 3 Units away from point " A " ( ie. |AB|=3 ) and along the given direction vector .  any advices about how to calculate the coordinates ??????   
  is B a normalized vector?If so you move a point along that normal with multiplication by your constant.If not, normalize it and do it anyways.   ;  no B not normalized  , B is the point i want to get it's coordinats so i can't use it while i don't know it's coordinates   ;  Smells like homework.Normalize the direction vector.Multiply the direction vector by 3.Add the direction vector to A. (Edit: The vector after multiplying)This is the value of B.   ;  Oops I misread. Thought B was your direction vector.   ;  no not homework, Homework is more harder ;) thanks guys it worked   