Lerp() [2/2]

static void Microsoft.Xna.Framework.Quaternion.Lerp ( ref Quaternion quaternion1, ref Quaternion quaternion2, float amount, out Quaternion result )

inlinestatic

Definition at line 407 of file Quaternion.cs.

    {
        float num = 1f - amount;
        float num2 = quaternion1.X * quaternion2.X + quaternion1.Y * quaternion2.Y + quaternion1.Z * quaternion2.Z + quaternion1.W * quaternion2.W;
        if (num2 >= 0f)
        {
            result.X = num * quaternion1.X + amount * quaternion2.X;
            result.Y = num * quaternion1.Y + amount * quaternion2.Y;
            result.Z = num * quaternion1.Z + amount * quaternion2.Z;
            result.W = num * quaternion1.W + amount * quaternion2.W;
        }
        else
        {
            result.X = num * quaternion1.X - amount * quaternion2.X;
            result.Y = num * quaternion1.Y - amount * quaternion2.Y;
            result.Z = num * quaternion1.Z - amount * quaternion2.Z;
            result.W = num * quaternion1.W - amount * quaternion2.W;
        }
        float num3 = result.X * result.X + result.Y * result.Y + result.Z * result.Z + result.W * result.W;
        float num4 = 1f / (float)Math.Sqrt(num3);
        result.X *= num4;
        result.Y *= num4;
        result.Z *= num4;
        result.W *= num4;
    }

References System.Math.Sqrt().