Intersects() [3/7]

float? Microsoft.Xna.Framework.Ray.Intersects ( BoundingSphere sphere )

inline

Definition at line 120 of file Ray.cs.

    {
        float num = sphere.Center.X - Position.X;
        float num2 = sphere.Center.Y - Position.Y;
        float num3 = sphere.Center.Z - Position.Z;
        float num4 = num * num + num2 * num2 + num3 * num3;
        float num5 = sphere.Radius * sphere.Radius;
        if (num4 <= num5)
        {
            return 0f;
        }
        float num6 = num * Direction.X + num2 * Direction.Y + num3 * Direction.Z;
        if (num6 < 0f)
        {
            return null;
        }
        float num7 = num4 - num6 * num6;
        if (num7 > num5)
        {
            return null;
        }
        float num8 = (float)Math.Sqrt(num5 - num7);
        return num6 - num8;
    }

References Microsoft.Xna.Framework.Ray.Direction, Microsoft.Xna.Framework.BoundingSphere.Radius, System.Math.Sqrt(), and Microsoft.Xna.Framework.Vector3.Z.