This should be what you want, as you can add mouse button down to drag, and let go. I have used this for tiles, ship pieces, and unit placement, and it works. For somethings, if they are bigger than the 32x32, than you will need to offset it, but if it is just for tiles, you shouldn't have this problem.
Tile -> DrawActor -> Script Editor
- Code: Select all
x=round(x/32)*32;
y=round(y/32)*32;