attacher à une grille isométrique ?

// Script: move_snap_isometric(hsnap, vsnap)
// Purpose: snaps the instance to an isometric grid.
// Inputs:
//  argument0 = the horizontal snapping value, i.e. the width of the grid.
//  argument1 = the vertical snapping value, i.e. the height of the grid.
// Example:
//  move_snap_isometric(32, 16);
var m, n;
m = round(y/argument1 - x/argument0);
n = round(y/argument1 + x/argument0);
x = (n - m)/2*argument0;
y = (n + m)/2*argument1;