Rotator question

[2COOL4-U]

I have two vectors and I want to get the angle between those two vectors

Anyone got an idea on how to do this?

 

[Mychaeel]

Given UnrealScript's lack of a decent atan2 function, here's my suggestion:

static final operator(16) float angle (vector v1, vector v2) {

  local float DotProduct;
  
  DotProduct = v1 dot v2;
  
  if (DotProduct == 0.0)
    return Pi / 2;
  else if (DotProduct > 0.0)
    return Abs(Atan(VSize(v1 cross v2) / DotProduct));
  else
    return Abs(Atan(VSize(v1 cross v2) / DotProduct)) + Pi / 2;
  }

Use it as MyVector1 angle MyVector2. Returns values between zero and Pi.

 

[2COOL4-U]

so PI = 360, and 0 = 0 degrees?

 

[Mychaeel]

No. 0 is 0° (both vectors pointing in the same direction), and Pi is 180° (both vectors pointing in opposite directions). Anything between 180° and 360° doesn't make sense if you're asking for an angle between vectors; 270° in one direction is the same as 90° in the opposite direction, for instance.

Otherwise, have a look at this related thread.