public static Vec2f Slerp(Vec2f x, Vec2f y, float a)
{
// Dot product - the cosine of the angle between 2 vectors.
var dot = Vec2f.Dot(x, y);
// Clamp it to be in the range of Acos()
dot = MathF.Clamp(dot, -1.0f, 1.0f);
float theta = MathF.Acos(dot) * a;
var relativeVec = Vec2f.Normalize(y - x * dot); // Orthonormal basis
return((x * MathF.Cos(theta)) + (relativeVec * MathF.Sin(theta)));
}
public static float GetAngle(Quatf q)
{
//return (float)MathFunctions.Degrees((float)Math.Acos(q.w) * 2.0f);
return(MathF.ToDegrees(MathF.Acos(q.w) * 2.0f));
}