physics_particle_delete_region_poly(pointList)
| Argument | Description |
|---|---|
| pointList | A ds_list of points to use to create the polygon. |
Returns: N/A
With this function you can delete (remove) all the particles
that fall within the bounds of the defined polygonal area from the
physics simulation in the current room. The function takes a
(previously created) ds_list()
containing the x/y position of each point of the polygon, with the
even numbered positions in the list being the x coordinates, and
odd numbered positions the y coordinates, ie: for a triangle, your
list would have six entries, with entry 0, 2, and 4 being the x
coordinates and 1, 3, and 5 being the y coordinates. The polygon
will then be used to delete all the particles that fall within the
defined area.
Note that the polygon defined must have at least three
points, and at most 8.
var list = ds_list_create(p_list);
for (var i = 0; i < 5; i ++;)
{
ds_list_add(p_list, mx[i]);
ds_list_add(p_list, my[i]);
}
physics_particle_delete_region_poly(p_list);
ds_list_destroy(p_list);
The above code will delete all particles found in the polygonal area defined by the points added to the ds_list.