By using the “building” tools in Second Life (actually 3D wire-diagram and texturing tools), complex models can be constructed quickly, and with practice, easily. With a length conversion calculator in hand, I was able to build the house model at 1:1 scale. The only complexity was that Second Life uses metric measurements, while most US builders prefer English, so I wanted to make it easy to calculate square feet rather than square meters. The building platform is slightly smaller than one acre (60m square). And yes, I do intend to clean up the roofline for those architectural engineering purists out there. It’s a preliminary sketch, ok?

Oh, and of course I do have the presentation on my iPad. In fact, I created it there using Apple’s Keynote for iPad app, and exported it to PDF. This might come in handy when we talk to a real builder, since we can show him our ideas without requiring him to go into Second Life to see it. The same is true of our Realtor, who will be able to see exactly what kind of lot we are looking for. As a portable electronic portfolio, the iPad would be hard to beat.

When I got to the meeting place, I saw my friend Piet Hut, who is the group’s founder. He’s in Japan right now, so the time of day was downright normal for him to be out and about. The other person there tonight lives in Australia, so her clock is also on a diurnal schedule. But even us nightowls can always find somebody awake in a virtual world whenever we decide to go there.

Anyway, the person I’d been twittering with earlier, Wan-Qi Kim, is involved in teaching meditation, etc. so I had suggested he might like to visit Kira Café. I think it would be fascinating to introduce these two brilliant men, but don’t know if I can lure Wan into SL to do so, and catch Piet there at the same time. Maybe someday. If it’s meant to be, it will happen.

However, while it is not possible to get the hardware accelleration normally available from the GPU, it is still possible to use vReveal to clean up shaky, low-contrast videos. It just takes longer since it will be processed by the CPU instead of the GPU. Much longer — in some cases it can be up to 20Xs slower on the CPU. But if you have the time, it can be done with just one click of a button.

While investigating CUDA, I was bemused to see a whitepaper in the Nvidia CUDA Zone called “Fast N-body Simulation with CUDA”. If you’ve been following this blog for awhile, you may recall an item I wrote about a year ago, called Virtual Worlds Galore, that included a video made by the guys at Genkii in cooperation with the Meta Institute for Computational Astrophysics, or MICA, on this subject. Apparently n-body simulations are all the rage now that desktop computers are capable of displaying them, thanks to virtualization and graphics acceleration architectures like the Nvidia CUDA. They’re a bit over my head, since I’m neither an astrophysicist nor a 3D visualization expert, but its fascinating to follow what’s being done by people who are. And it is more than a little interesting to see how so many of the topics I cover are connected one way or another in unexpected ways.

My account (name: KatLemieux) is only a few hours old, so there’s not much to tell yet, but as soon as enough data has been gathered to make it worthwhile, you’ll see it here. You’ll really see it here as soon as I figure out how to do that embedding thing (and manage to get my island into presentable shape).

Sparkle is a virtual worlds (VW) client for the iPhone that allows the user to login and communicate via instant messages with friends, and via proximity chat with avatars that are in the same location. Sorry, you probably need to try a VW like Second Life to understand what that’s about and why it is an exciting development. For now, please just accept that being able to connect to Second Life and interact live with others there even when you can’t log in normally is a big deal. For instance, I’ll be able to attend meetings from my iPhone and see what is being said in chat even if I don’t have my computer set up or if I’m in an internet café without my laptop.

Besides Second Life, Sparkle will connect to other grids as well, such as OSGrid or Second Life’s beta grid. Right now, those three are the only VWs available, but I’m sure others will be added as demand warrants. It’s possible to set up any number of accounts for various grids, limited only by the number of avatars you have. In fact, you can even sign up for a new account via Sparkle! Select the approprite service, fill in your account username and password, and there you go.

Choose the account you want to login with from the resulting list, click the “Go!” button, and your friends list appears on the next screen, with those online indicated with highlighted stars beside their names, while offline avatars are shown with dimmed stars. To send an IM to one, you select the name, then click the “IM” button on the next screen. A window with the virtual keyboard appears, and you proceed to communicate.

It seems pretty simple, and it is easy to use, but the implications are really awesome. The only real gripe I have about it is the requirement to use WiFi, but there is probably no way around that. Second Life in particular probably needs more bandwidth than the plain old cellular signal can provide. As it is, people who have very long friends lists (like me) have reported long waits to log in. Genkii’s tech support is working on it, and in fact I’ve had better luck logging in with my main account lately, after the first few attempts when it took several long minutes.

Sparkle IM gets a high rating from me. I’ve been waiting for someone to publish an iPhone app for connecting to Second Life, and this is a good one that works. Thanks, Genkii!

In the course of the conversation, though, after I explained how we use the internet, particularly for connecting to Second Life, she told me that while Verizon doesn’t have a plan that can help us, there is another major carrier in the US that has an unlimited data plan. She just couldn’t tell me who it was, being a competitor and all that. I thanked her for the info, and started doing some research. The Verizon rep told me we still have until the 14th of February to return our AirCard without having to pay a penalty to cancel our existing plan if we decide to go to another carrier, so time is of the essence.

After talking to AT&T, Sprint, and T-Mobile, though, I’ve come to the unhappy conclusion that we are stuck. Oh, there are some unlimited data plans out there, in particular from Sprint (their Simply Everything® plan) and T-Mobile (who have a plan called Total Internet for Data Cards), but each has show-stopping details. The Sprint plan only works with some phones, and while some of their phone descriptions say they can be connected to a laptop (“tethered”), it’s not necessarily something they encourage, and they certainly don’t tell you how to connect it to a wireless router. In particular, the T-Mobile rep told me that while it may be possible to connect a phone to one of our computers, it would be really slow, possibly even slower than dial-up. That obviously won’t work for us.

If we do have trouble pulling in a signal, there is one more piece of equipment Mark reminded me of this morning. He has not only an antenna, but put an amplifier between his aircard and the antenna. So if we need to, we’ll add that later, but right now it looks like we’re doing ok.

While I was on the Wilson Electronics site, I saw their announcement of a forthcoming signal booster for the iPhone. It appears to be designed for in-vehicle use (with a hands-free headset, of course) but it does have a 12-volt charger unit and cradle as well as magnetic antenna, so maybe it can be hand-carried as well. I’ll keep my eye on this and report more when I get details. The iBooster is also supposed to work with the Blackberry Curve.

The ability to put a 3D world in a webpage has some intriguing potential.

As it happens, I left a MICA meeting to talk to Henrik, and we had just been discussing many of the same things there, although on a more concrete basis. While Henrik was interested in general concepts, the MICA group is actively working on establishing one or more servers using different VW platforms, to use for developing their astrophysics simulations in 3D. One simulation that has already been done using OpenSim software is documented in this YouTube video:

The developers of this Newtonian n-body simulation, a group in Japan called Genkii, are now working with MICA. Adam Johnson and Jeff Ames are members of the Tokyo Genkii group, and are also OpenSim developers.

Tonight yet another group I’m involved with, the ISM planning group in Second Life, will be discussing yet more aspects of the same things, how to expand our virtual museum into the growing (someday to be) interconnected metaverse.

So, all the research I’ve been documenting in this blog is starting to have some results in the real world … uh, I mean, virtual world. (It’s more and more difficult to tell the difference between them these days.)

Last time I wrote, I was downloading the OpenSim server software to my external hard disk via SVN. That went well, but I have to admit that the instructions for compiling and running it on MacOS 1.5 were so daunting that I deferred that until after I’d tried out the binary under WindowsXP.

It worked! I installed and ran the binary version of the open source server on WinXP, which was installed on a virtual machine running in Parallels Desktop for Mac on my early 2006 20″ Intel Core Duo iMac, and while I couldn’t do much except look around with the camera tools (since I had not configured any of the other servers — asset, inventory and avatar databases), it was quite a thrill to know that I could have my own little world running on even a laptop unconnected to the internet if I wished. (The reason I use an external disk for my virtual machines is so I can access them using my husband’s 17″ MacBook Pro or any other Mac with Parallels Desktop installed.) I logged in using a copy of the SecondLife viewer, just editing the target definition in the shortcut’s general properties window, and using the default login ID and password of “Test User” and “Password”. The target I specified in Properties, of course, was the localhost URI, http://127.0.0.1 plus the designated port, in this case “:9000″.

Other VW Developments

In an already-running OpenSim grid (OpenLife), a week or two ago I met the person who started that system, Sakai OpenLife (OL name). It was interesting chatting with him, and he gave me a tip I’ve followed up on for porting content among VWs. He said many people have had good luck with Second Inventory, an application that creates a backup on your own hard disk of objects, textures, bodyparts, etc. as long as you have full permissions for those assets. I discovered that there is a multi-avatar version available, so while it’s a bit pricey (29 Euros, vs 14 Euros for the single-avatar version), I went ahead and bought it. It does indeed work as promised, although it is a bit slow to copy a large inventory since the “folder copy” function isn’t yet enabled and items must be backed up and restored one at a time. Folder actions are promised for the next version, though.

I ran a few tests, and I was able to back up and “restore” copies of simple and linked objects from both my primary and alt accounts in SecondLife to accounts in Open Life and OS Grid. It isn’t perfect; embedded scripts don’t always make it, and when they do they must be recompiled since not all LSL functions are available in the OpenSim VWs yet, and animations also don’t seem to come across when embedded in an object. Presumably those might be uploaded and added to objects if one has the .bvh files for them, though. My coffee mugs came through with their handles and “coffee” intact and didn’t require relinking, but the “drink” animation and script aren’t there, and the little “ring” piece used for the rim of the cup wasn’t linked. I just threw away the rings since they aren’t critical, and copied the particle steam script I used in SL, recompiled it and added it to the “steam” prim, but I haven’t done anything about the animation yet.

Interestingly, once I had the backups made, I could restore inventory items from my SL alt account as well as my main account to either SecondLife or another VW with impunity. The owner’s name didn’t make any difference to the software. When an asset is “restored” to an inventory, whether it came from that account or not, the owners name becomes that of the account that it’s being restored to, not the source inventory owner’s. There is certainly some potential for mischief here, especially since I was also able to “back up” some full-permission assets that I did not create, and when they were restored my avatar’s name showed up as the creator.

Copyrights and DMCA Issues

The ability to “rebrand” items that I owned full permission copies of, but had not created, made me wonder what the attitude of some of the content creators in SecondLife were toward these brave new virtual worlds. Would I be able to legally use copies of fulll-perms textures I’d bought in SecondLife in other worlds? I sent that question to one of the texture store owners I’ve patronized extensively, LilyBeth Filth, owner of Textures-R-Us. Predictably, she said, “No.” Here’s a direct quote from her IM, which I think explains her reasoning and the problem very well:

Hi, Our User License does not allow customers to use them in any other virtual world including SL open source clients. The reason for this is because they would be uploaded in your name and not that of the creator. In time people will share these textures with friends (as they always have) and before we know it people are selling work created by the original artist but uploaded by other people and it creates a nightmare of a DMCA issue. We create & sell textures for SL only. Sorry. LillyBeth 2008/5/17

So, it sounds like there could well be a whole new round of rights issues to hash out, even when the dream of a mostly seamless metaverse becomes a reality. The technology is not the only thing that needs to be mastered.