To get a vertice you have to find the point of intersection of the planes it
is part of. Like a vertice in a corner would be part of two side planes and
the bottom/top plane. But it is useful to have this size reduction. A
cylinder or odd shaped brush benefits from it, as does a very large map with
many brushes.
Chris
----- Original Message -----
From: "Ook" <[EMAIL PROTECTED]>
To: <hlcoders@list.valvesoftware.com>
Sent: Wednesday, November 14, 2007 12:43 PM
Subject: Re: [hlcoders] How to get actual vertices from map/rmf file?
I saw those - the BSP one was good, but there were things the author wasn't
certain about. Does Valve publish an official BSP format guide? The map
file
doesn't store vertices, neither does the vmf - those coordinates you see
are
not actual vertices, there are a more "efficient" way to store the plane
definition - it uses three coordinates for a four sided polygon, for
example, instead of storing the actual vertices (go figure?). Makes the
file
smaller, but you have to do some math to get actual vertices. It's not
difficult, but it's more work then I have time for right now. The BSP docs
say "vertex arrays", but I'm not sure if it has an array of vertices, or
actual vertex arrays (they are not quite the same thing). It also might
have
the normals in it, so I might spend a few hours extracting stuff from the
BSP and see if that will give me what I want. The BSP data is already
clipped, where the RMF data includes all of the planes that would normally
get clipped. Otherwise I'll go with the RMF, since it not only has actual
vertices for the planes, but has texture information in the same block,
and
texture u/v coords as well. It doesn't have the normals, but that should
be
easy to calculate. For my purposes, a few thousand extra polygons won't
make
any difference, because performance really isn't an issue.
I'm curious why they made the decision to not store actual vertices in
map/vmf files? The file size reduction really isn't significant, and the
files are highly compressible. Having actual vertices in the vmf would
make
it easier to work with outside of hammer.
----- Original Message -----
From: "Kevin Ottalini" <[EMAIL PROTECTED]>
To: <hlcoders@list.valvesoftware.com>
Sent: Wednesday, November 14, 2007 12:55 AM
Subject: Re: [hlcoders] How to get actual vertices from map/rmf file?
This is a good description of the BSP:
http://www.geocities.com/cofrdrbob/bspformat.html
It's probably a little out of date with the release of EP2 and TF2.
a good VMF description is here:
http://developer.valvesoftware.com/wiki/VMF_documentation
VMF is easy to get the coordinates, just open it in wordpad. I would
export
the .RMF to .MAP then open the .MAP in wordpad to get similar information
(or you can import the .RMF to VMF).
----- Original Message -----
From: "Ook"
To: <hlcoders@list.valvesoftware.com>
Sent: Tuesday, November 13, 2007 8:22 PM
Subject: [hlcoders] How to get actual vertices from map/rmf file?
Does anyone know of an easy way to get vertices from a map/bsp/vmf/rmf
file?
The rmf, and I think vmf, don't actually store vertices, they store 3
sets
of xyz coordinates and I'm not sure how they get to/from the actual face
it
represents. I'm looking at the format for the rmf file, and if I
understand
what it is telling me, it stores:
int number of vertices
Vector[] vertex coordinates in clockwise order looking from
front
of face
Vector[3] 3 points defining plane of face (VHE simply uses a
copy
of the first 3 vertices)
( from http://extension.ws/hlfix/rmf.html )
It also stores the texture u and v axis, which is way cool, and if it
really
does have actual vertices, then I can calculate the normals for the
vertices.
I'm guessing that when it says vertex coordinates, it means the actual
vertices of the face, not the "3 points defining plane of face", as
those
follow what appears to be the list of vertices. Anyone have experience
with
this, and know if extracting these vertices from the rmf is the easiest
way
to get actual shape vertices?
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