var xx = x;
var yy = window_get_height() - y;
d3d_set_culling(true);
d3d_transform_set_rotation_y(angle);
d3d_transform_add_translation(xx, yy, 0);
draw_sprite(sprite, 0, 0, 0);
d3d_transform_set_rotation_y(angle + 180);
d3d_transform_add_translation(xx, yy, 0);
draw_sprite(sprite, 1, 0, 0);
d3d_transform_set_identity();

collidewith = noone;

if collidewith == noone
{
     collidewith = other;
     код который надо вызвать один раз
     ...
}

if collidewith != noone && ! place_meeting(x, y, collidewith)
{
     collidewith = noone;
}

In previous versions of GameMaker it was a complicated business to import and export files from one project to another, and if you weren't careful you could end up with a corrupt game or loss of data. Thankfully, that has all changed with GameMaker: Studio as the *.gmx format makes sharing resources between projects a simple and painless procedure.

list = ds_list_create();
for (i=1; i<=100; ++i) {
     ds_list_add(list, i);
}
ds_list_shuffle(list);