Rotating a Vector2

[Mikachu]

Hi,

For a project of mine, I implemented t hat function :

Code: Select all

// Rotates a Vector2 by a given oriented angle
	static inline Ogre::Vector2 rotateVector2(const Ogre::Vector2& in, Ogre::Radian angle)
	{
		return Ogre::Vector2(in.x* Ogre::Math::Cos(angle) - in.y * Ogre::Math::Sin(angle),
			in.x * Ogre::Math::Sin(angle) + in.y * Ogre::Math::Cos(angle));
	}

It just rotates a given Vector2 by an angle, just like a Quaternion does on a Vector3...
I think it could be made a member function of Vector2.

I'll post a patch for this if I get the time

[cyrfer]

Patch!
Too bad there is no 2x2 matrix class.

If the 2x2 support existed, you could just say:
Vector2 vPrime = R2x2 * v;

Here is how you can use a 3x3 (already works):
Vector3 vPrime3 = Rz * Vector3(v.x, v.y,0.0);
Vector2 vPrime( vPrime3.x, vPrime3.y );

[Mikachu]

Patch sumbitted