Ginput with snap to grid

MOUSE_POINTS Input nodes from a grid.
Mouse_Points allows to input points using a variation of ginput Matlab function. The points will snap to the grid. The function returns the [n X Y] matrix (n = number of non repeated nodes, X = x coordinate, Y = y coordinate). The function is mouse friendly.
Left Click : add a point
Scroll : zoom in/out
Scroll Wheel click : pan
Double Scroll Wheel click : reset view to default view
Right click : set new default view
Enter : return [n X Y] matrix