CompuServe Thread

#Pentium anyone?

27 messages in this thread
#49486From: doug wolfgramJul 13, 1993 8:13 AM
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.
#49576From: Mitchell WaiteJul 13, 1993 11:19 PM
Doug: What is then name of your book and the publisher. I really look forward to it as I like VistaPro a lot. Mitch
#49630From: doug wolfgramJul 14, 1993 12:45 PM
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.
#49815From: Mitchell WaiteJul 16, 1993 1:20 AM
Thanks Doug, I'll be sure an order a copy. Is it out soon? Mitch
#49897From: doug wolfgramJul 16, 1993 5:26 PM
Should be about Aug 1, but I don't know the exact date…
#49915From: Tim c BrananJul 16, 1993 8:21 PM
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…
#49926From: doug wolfgramJul 16, 1993 9:49 PM
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…
#49931From: Tim c BrananJul 17, 1993 12:31 AM
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…
#49965From: Ron WodaskiJul 17, 1993 1:26 PM
Where did you get the DEM files? I also use Vista Pro, and am curious… Ron
#49979From: Tim c BrananJul 17, 1993 4:18 PM
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.
#50017From: Ron WodaskiJul 18, 1993 11:04 AM
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
#50040From: Tim c BrananJul 18, 1993 7:23 PM
I called around and found it at Egghead yesterday, thanks for the info, though.
#50080From: John TissavaryJul 19, 1993 3:37 AM
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)
#50112From: David TaffetJul 19, 1993 10:47 AM
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
#50193From: Tim c BrananJul 19, 1993 8:30 PM
I tried that last night and ended up with a real blocky looking end result. I tried smoothing in 3ds to no avail.
#50192From: Tim c BrananJul 19, 1993 8:29 PM
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.
#50016From: Mitchell WaiteJul 18, 1993 10:55 AM
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.
#49930From: John HinkleyJul 16, 1993 11:39 PM
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.
#49933From: Tim c BrananJul 17, 1993 12:35 AM
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.
#50001From: John HinkleyJul 18, 1993 2:24 AM
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.
#50003From: Tim c BrananJul 18, 1993 2:54 AM
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.
#50005From: John HinkleyJul 18, 1993 3:43 AM
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.
#50039From: Tim c BrananJul 18, 1993 7:22 PM
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.
#50113From: David TaffetJul 19, 1993 10:47 AM
>>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
#50023From: SyndesisJul 18, 1993 12:17 PM
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…)
#50079From: John HinkleyJul 19, 1993 3:26 AM
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.
#50002From: John HinkleyJul 18, 1993 2:24 AM
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.