I am making some kind of RTS game, to mimic the visual effect like SC.
When the gamer click the armory UI, the transparent model is appearing, then gamer can drag it to terrain to build this building wherever they want.
So far, I can place the building on the terrain by click, but I hope gamer can drag it to the scene.
Thus, what kind of function I can use in Unity 3D? please give me some advices or instructiions, thanks for your help.