Posted by Osan`gar on February 22, 1998 at 00:56:25:
In Reply to: Re: fixing sector not convex posted by Osan`gar on February 22, 1998 at 00:54:25:
> > > after using the consistancy checker, it said that a secotr of my lvl wasnt convex. how do i fix this, by not being convex, i cannot acces this sector and move around in it....
> > > this is something i NEED to know...
> > > so if u know how to fix it, tell me please!
> > > Thanks
> > > PIG DOG
> > This has happened to me and the least painful way I have found is to delete it,
> > insert a new sector and cleave to suit the sectors around it. Of course, if
> > the sector has a lot of cleaves in it, this can be quite daunting.
> Ok, don't start deleting sectors yet. I am going to explain exactly what a convex and a concave sector is. First off, there are two things (at least) that can cause a sector not convex error. 1) The sector is not convex or 2) A surface in the sector is not convex. Now, what is a convex sector? A convex sector is one in which the interior area of all the angles of the polygon are in the interior of the polygon (does anyone actually remember Geometry class). Thus, a cocave sector is a sector in which the interior of one or more angles is in the exterior of the polygon formed by the angles. Ok, I know that is more or less technical, so I am going to provide examples below.
> Convex:
> ******
> * *
> * * <----interior of angle is in the interior of the polygon
> * *
> ********
>
> Concave:
> *********
> * *
> * * <----interior of the angle is in the exterior of the polygon
> * *
> *******
> I hope this clears up the problem that some people have had determining what a convex and a concave sector/surface. I know the feeling. I just realized the other day what it meant by convex and concave. I was thinking about it and all of a sudden Geometry class came back to me and made a whole lot more sense. ;) All thanks to Jedi Knight. :) This problem can be corrected with some very simple cleaving or merging. You may have to get a little inventive, but now that you know what a convex sector/surface looks like, you'll know how to avoid creating the error. I hope this helped.
I went to all that trouble of drawing that picture and it didn't even show up right! That pisses me off! Sorry guys. I hope you got the idea through my explanation. If you didn't, maybe someone else can draw the picture.