#Pentium anyone?
27 messages in this thread
Hi John! Good to see you on CIS. My book on 3D is about to be sent to press.
Should be on the shelves by early August. Now the whole world can get a demo
version of VistaPro for Free by buying the book. Yhanks for a wonderful
program.
Doug:
What is then name of your book and the publisher. I really look forward to it
as I like VistaPro a lot.
Mitch
Hi Mitch. It is "Adventures in 3D" from Que. It focuses more on the anaglyph
and stereo side, however, there is a section on 3D programs and how they work
including descriptions of flat, gouraud and phong shading. It comes bundled
with VistaPro and Castle Wolfenstein. It should be a really fun book for anyone
who is interesed in playing around in the world of 3D on computers.
Thanks Doug, I'll be sure an order a copy. Is it out soon?
Mitch
Should be about Aug 1, but I don't know the exact date…
Interesting combination (vista pro and wolf 3d) maybe you should have waited
for Doom. I have a question maybe you can answer. I picked up the demo last
night for VistaPro and I noticed it said somthing about DEM's. Does it mean
actual DEM's like from USGS, or is this some program specific thing that is
completely different? We just got in some DEM's of alaska and it would be more
fun to do a fly through than use it to calculate timber, IMHO. Now if they
would only pay me to do such a thing…
It is in fact USGS DEM files. You may be in luck! They also sell add-on DEM
file for most of the US. As far as the book goes, the different programs
illustrate different points. VistaPRO illustrates fractal 3D usage and Wolf3D
illustrated 3D technology applied to games. At the time we needed final
versions of the software, Wolf3D was the only program available. The newer
versions from Apogee aren't available yet and won't be for some time. Although
VistaPro supports USGA DEM files, the ones you have may not be in the correct
format. They may put soe sort of header or something on them…
The ones I have seem to have a header and a footer. I don't know what else they
might be, but then again, my knowledge of DEM'S is limited to what I learned
messing around with them the last couple of days. the program we have at work
(all 8000 dollars of it) has some sort of bug or problem and I can't get one to
import in. Very frustrating. I couldn't even get one in ARC/INFO either, but
that was probably just my inexperience with dem's…
Where did you get the DEM files? I also use Vista Pro, and am curious…
Ron
Got them straight from USGS on 9-track tapes. don't recommend that route unless
you want to wait for weeks and pay to convert the tapes. I work for a forestry
consulting firm and we do a lot of GIS and mapping projects, so I let the
company pay the stuff and I take it and play with whatever looks interesting.
Where did you get VistaPro? I can't seem to find it anywhere.
I wrote a book about Vista Pro, and obtained it directly from Virtual Reality
Laboratories. I've seen it at Egghead stores, and I have also seen it from
time to time in the mail order ads. I don't, however, have a specific source
that I can guarantee has it on the shelves.
Ron
I called around and found it at Egghead yesterday, thanks for the info, though.
Will it be possible to convert the Vista and DEMs to ACAD12 (DXF, etc…) then
T-grid the model? My partner and I just did a terrain model of a part of the
SF Bay Area that was positively useless as a triangle based mesh, but was
fabulous as a T-grid.
John Tissavary (La Luna Cie)
There is a multi-step method for converting DEMs to DXFs which I successfully
used this last weekend. The method came to me from John K. Jordan, a forum
member in these here parts. Use VP to export the DEM as a PCX file. Take it
into an image processing package (Corel, Photostyler, etc.) and convert to
greyscale (or is that grayscale? I don't know). Save it as a GIF (if you
processing package won't, save as PCX again and go into Animator Pro, import it
and save again as GIF). Then use GIFDXF.EXE (available on this forum) to
convert the GIF to a DXF file. It's many steps, but it works!
David Taffet
I tried that last night and ended up with a real blocky looking end result. I
tried smoothing in 3ds to no avail.
explain what a t-grid is and I might be able to help. I may think of a t-grid
as something else. My whole point was to try to get a mesh without a whole lot
of user intervention.
Doesn't wolf3d mostly explain fast texture mapping? Its 3D is really a false
kind of 3D, no? Now if I could use VistaPro to make flybys that are used in a
fast program like Wolf, I'd be excited. What can you say about wolf that is
related to vistapro. They don't have much in common to me.
Tim,
Vistapro uses it's own format for DEM data which is much less verbose than the
USGS ascii format (about 1 byte per point as opposed to the USGS's ~6 bytes per
point). If you want to convert USGS format to Vistapro format you can use the
program I wrote called MCNV.EXE. There's an older version available in VRLI DL
section of GraphAVen (GO VRLI). There's a newer version on VRLI's BBS at
805-781-2257 — look for MCNV3.LZH. Have fun…
John.
is there such a program that will convert a DEM to a simple mesh to use in 3ds?
A simple program, that is. At work it becomes an involved and complicated
process, and it would be nice to just bounce one to the other. Is Vistapro
available at spots like egghead, or is it by dealers? I seem to think I saw it
somewhere, but it is fuzzy. Sounds like a fun program.
Tim,
I don't know of any programs on the PC that will convert Vistapro or USGS DEMs
for use in 3DS. The Amiga version of Vistapro has the ability to export a DEM
(or part thereof) into one of the Amiga 3D formats. I know of another program
on the Amiga that translates 3D objects from one format to another. You might
be able to find some common ground somewhere in there if you have access to an
Amiga.
Vistapro is available at Egghead and most of the other computer chains although
it's still a little hard to find. You can also order it directly from my
publisher Virtual Reality Labs Inc (VRLI) at 800-829-VRLI. They're always
having sales…
There are also several small utilities written by several people for converting
some other GIS formats into Vistapro DEMs. They're available along with the
Vistpro Demo program (largely functional) on VRLI's BBS at 805-781-2257.
John.
Quite the night owl, aren't you? I picked up Vista Pro today and tinkered with
it some this afternoon. I tried to import a dem of bend, oregon into vista pro
unsing that conversion program of yours, and it only seems to sector it off
into chunks, instead of the whole thing at once, as I would have prefered. It
wasn't a big problem, as I finally got the dems to read into the program at
work that is supposed to read them in. I exported the dem back out and
converted it to a pcx file, but I have not brought it back into vista pro yet.
I don't suppose you could throw in a wireframe mesh export option in the next
release? I know it isn't strictly have anything to do with vista pro, but it
sure would be handy. I tire of having to jump through a lot of complicated
loops to get from a to b sometimes. Anyway, from what I've seen, vistapro looks
like a cool program and I plan to waste plenty of hours in front of it.
Tim,
TB> Quite the night owl, aren't you?
Yeah, I'm usually up to about 4AM or so. I get up around noon… It looks like
you're up late too!
MCNV saves it's data in Small Vistparo landscapes. To load the seperate chunks
created by MCNV do the following:
1) Set the DEM Size (Project Menu) to either Large or Huge. Large
will give you an area equivalent to 4 Small landscapes. Huge
is 16 Small landscapes. 2) Use the Load Region menu item (Load Menu) to load
in multiple
hunks. When Load Region asks for a filename, pick the one that
you want to go in the lower left hand (south-west) corner.
Vistapro will then automatically load all files that fit in
the defined area. 3) You can then save the Large or Huge DEM file using the
Save DEM
function if you want.
Note that the "empty" areas will still be rendered as 0 altitude, so don't use
a DEM Size larger than necessary to hold the data of interest.
Be sure to keep each set of DEM files from MCNV in seperate directories since
Vistapro searches through all files in a given subdirectory for landscapes that
will fit into the current region. If you put zillions of files in one
directory it will take longer to load regions. There's also the possibility
that other files will map to the same area leading to them being loaded over
the area of interest.
The PCX->DEM method is less useful than MCNV since a PCX image can only support
256 discreet altitudes (one for each color). But sometimes there's no other
way. And you can use PCX->DEM and DEM->PCX to export landscapes, modify them
with a paint program, and then re-import them. I recommend using a smoothing
pass or one Fractalize pass to either smooth out the steps or add fractal
detail.
By "wire frame mesh" I assume you mean as a 3D export function. I'll probably
add it to the next version of Vistapro, or maybe as a standalone utility.
You'll be dissapointed with what you get from 3DS though. Like I mentioned
before, the Amiga version has supported one of the Amiga output 3D formats for
quite some time. We often get people complaining that there's something wrong
with Vistapro since the other 3D packages can't render these exported
landscapes nearly as nicely as Vistapro. A Small Vistapro landscape is 66,000
points, and 130,000 triangles. And that's before any fractal detail or trees
are added. I have rendered images with over 10 million polygons!
There are some uses for Vistapro DEM's within other rendering packages though.
For instance, some people on the Amiga are using the exported landscapes as a
guide for placing other objects in their 3D packages. They then use Vistapro to
render the backgrounds and overlay the objects rendered with the other package.
I imaging that it will also be useful to save out a small area around a house
or other item of interest so that 3DS objects can cast shadows on the part of
the landscape it renders.
Other utilities I'm considering are a routine to transform a Vistapro script
into a 3DS camera path and vice-versa. This will make it easier for animators
to synchronize paths. I'll be looking into the possibility of an IPAS version
of Vistapro but I don't think 3DS will be able to handle it….
In any case, thanks for purchasing Vistapro. I hope you spend many enjoyable
(and maybe even productive) hours playing with it. And I do appreciate your
suggestions and comments even though I can't always deliver….
John.
thanks for the info. I figured out the region thing after messing around a
little more, but I didn't try it since it was close to three a.m. at this
point. I'll have to show vista pro to the head honcho here at work. He always
likes pretty pictures. Too bad I can't use it for any work releated stuff. Oh,
well.
>>There are some uses for Vistapro DEM's within other rendering packages
though. For instance, some people on the Amiga are using the exported
landscapes as a guide for placing other objects in their 3D packages. They then
use Vistapro to render the backgrounds and overlay the objects rendered with
the other package. I imaging that it will also be useful to save out a small
area around a house or other item of interest so that 3DS objects can cast
shadows on the part of the landscape it renders.<<
John – This is exactly what I'm doing in 3DS…
David Taffet
Our translator program "InterChange Plus" can convert Vista binary DEMs to
other formats, including DXF and 3D Studio. (Vista binary DEMs are different
than the ASCII DEMs you get from the USGS.) However, you must keep in mind the
heady constraints of DEMs versus 3D Studio. A small DEM is 258 x 258 grid
squares, which becomes more than 64K triangles. 3DS is limited to 64K
triangles per sub-object. So, you've certainly got a lot of triangles to think
about, and if the landscape is split into separate objects, it won't smooth
correctly.
We hope to have InterChange Plus up and running on the PC this fall. Right
now, it's running on the Amiga. (John, I know you know this…)
John,
Could you send me a copy of InterChange Plus for the PC when it's ready? My
Amiga died recently and I don't really have any plans to revive it….
Are you going to do InterChange Plus under Windows or DOS? I could be
persuaded to part with my DOS windowing stuff if you need it…
John.
Doug,
I'm glad you hear the book will be out soon. By the way there's an improved
demo version of Vistapro if your interested — probably not since it would
require changing the book….
John.