How is your calling stuff from EndScene concept?

[Viano]

K, thanks for all your answers.

One last question: what 3D/Vector library do you guys use for 3D calculation? I for example would like to calculate a point for ClickToMove that is X yards away from the next target in direction of the player. In my opinion that is easily done with vectors but I never used vector calculation in C#.

System.Windows.Media.Media3D namespace seems to be what I need.

[adaephon]

I'd recommend XNA and the associated namespaces. The main benefit it has over WPF is that WPF is all based on doubles as the primary data type (i.e. a 3D vector contains 3 doubles, which is 3 fields by 8bytes). XNA's 3D vector, however, is backed by floats which makes it align properly with WoW's position data (which also uses floats).

As the struct is marked with LayoutKind.Sequential, you can easily read the position data from WoW with Marshal.PtrToStructure(). It provides all the methods you would need for calculations, dot and cross products, angle between etc.