sc_snap

//Snaps the X/Y values accordingly to a specified isometric grid
//Automatically rounds X/Y values
//arg0 - X value to be snapped to
//arg1 - Y value to be snapped to
//arg2 - X snapping factor
//arg3 - Y snapping factor
//returns nothing

//Example
//sc_grid_snap(x,y,32,16);
//That code snaps the object to a 32x16 isometric grid
//The room grid can be used to "pre-test" a grid when set to "Isometric"

var yy, check;
yy = argument1;
x = sc_round(argument0,argument2/2);
y = sc_round(argument1,argument3);
check = sc_round(x,argument2);

if (check != x)
{
    if point_direction(x,y,x,yy) = 90
    {
        y -= argument3/2;
    }
    else
    {
        y += argument3/2;
    }
}