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Viewing 15 posts - 1 through 15 (of 25 total)
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  • in reply to: Glitch / freeze on Startup #103320

    Shot
    Participant

    While replacing the RAM did fix the occasional freeze-ups while in use, we do sometimes experience an unresponsive issue on start-up. As you said, simply exiting and restarting the software fixes it. Once restarted, the software works fine all day long. Thinking it might be a “race condition” of some sort, I’ve tried adding delays in the start-up script in various places but have been unsuccessful in eliminating this occasional annoyance.

    -Steve

    in reply to: Glitch / freeze on Startup #103319

    Shot
    Participant

    The unpredictable nature of it suggests that it might be faulty hardware. I struggled with some occasional flaky behavior with our setup initially, but eventually, through the process of elimination, determined that the problem was a bad RAM module.

    -Steve

    in reply to: Volcanic eruption #103168

    Shot
    Participant

    Unless this feature was added to a recent version of the software, I’m not sure that capability is built in.

    -Steve

    in reply to: Anyone recommend a good Projector? #102968

    Shot
    Participant

    That model seems to have an even shorter throw than the originally recommended MX631ST projector, which seems to imply it would have to be mounted closer to the surface of the sand.

    Actually, I was neglecting the BenQ MW632ST’s 16:10 aspect ratio, which means it would need to be a bit further (3-4 inches) from the sand surface (assuming my calculation is correct) than the originally recommended BenQ MX631ST. So basically, it would need to be about 43″ above the sand instead of 40″. It doesn’t seem like that would pose much of a design problem.

    -Steve

    in reply to: Anyone recommend a good Projector? #102966

    Shot
    Participant

    Ok, yeah I think I got it now. Thanks much!

    in reply to: Anyone recommend a good Projector? #102963

    Shot
    Participant

    Thanks for the info, Oliver. I’m a bit puzzled by the following though…

    The Optoma projector requires a projection distance of 57″ +-5% to fill a 40″x30″ sandbox, which is approx. 17″ more than the old BenQ (and the Kinect).

    The specs indicate a throw ratio of “1.18 – 1.54”. I assume that means it’s adjustable. If set to the low end of that range, wouldn’t that be just 48 inches above the sand?

    Thanks for the clarification.

    EDIT: Oh wait, is it because of the difference in aspect ratio between the projector and sandbox – i.e. the projector has to be farther to fill the smaller sandbox dimension?

    -Steve

    • This reply was modified 1 year, 10 months ago by  Shot.
    • This reply was modified 1 year, 10 months ago by  Shot.
    in reply to: Anyone recommend a good Projector? #102960

    Shot
    Participant

    The MX 631 ST projector is out of production. Has anyone found a replacement? Must be short throw and 4:3 aspect. Thanks

    I’m currently assisting another science center with an AR Sandbox installation and came across the following projector which looks quite promising…

    Optoma W345

    It has a 1.2 throw ratio, which means it must either be mounted a bit higher or a mirror must be used. Being 8-10 inches higher would not necessarily be a bad thing IMO. It also has slightly higher lumens, a better contrast ratio, and is a bit cheaper than the BenQ MW632ST. Anyone have firsthand experience with the Optoma W345 projector?

    And oh yeah, it also has a 3-year warranty. I can’t find much in the way of reviews, but perhaps that’s because it was released rather recently. Other models of the Optoma brand do seem to get good reviews though.

    -Steve

    • This reply was modified 1 year, 10 months ago by  Shot.
    in reply to: Anyone recommend a good Projector? #102958

    Shot
    Participant

    The BenQ MW632ST’s native resolution is 1280×800, which yields a 16:10 aspect ratio. If you feed it a 4:3 1024×768 video signal, it might do the right thing and pad the signal on all sides so that you get a 4:3 inset of the native display panel. With DLP’s high contrast, you might not notice the overprojection.

    Oliver, would building a sandbox in a 16:10 aspect ratio instead of 4:3 work, or does the software assume a 4:3 aspect ratio for both projector and sensor? Mounting the sensor at a height which covers the longer dimension would “waste” some sensor resolution on either side of the shorter dimension, but aside from the wasted sensor area, would this pose any problem?

    In other words, instead of exactly matching aspect ratios for the sensor and projector, would it be possible to “fit” the projection within the sensor area?

    -Steve

    • This reply was modified 1 year, 10 months ago by  Shot.
    in reply to: Anyone recommend a good Projector? #102957

    Shot
    Participant

    I just went and double checked, that is the exact model I have: BenQ MW632ST 3,000 Lumens
    It does in fact have a 4:3

    That model seems to have an even shorter throw than the originally recommended MX631ST projector, which seems to imply it would have to be mounted closer to the surface of the sand. What is the height of both your sand surface from the floor and the projector from the sand? Also, is that an “above-axis” projection model like the MX631ST – i.e. must it be mounted at the edge of the sandbox?

    in reply to: AR Sandbox post-installation setup #102816

    Shot
    Participant

    Thanks, Oliver! Sorry for the double post. I didn’t realize you had answered my question! (I keep forgetting to check the “Notify me…” box!)

    -Steve

    in reply to: Binding Mouse Buttons to Rain #102815

    Shot
    Participant

    Oi! Thanks, Ryan! I’m actually the one who posted that question. I guess I forgot to subscribe to the topic!

    -Steve

    in reply to: AR Sandbox post-installation setup #102766

    Shot
    Participant

    That’s helpful information. Thanks. However, for our installation, I would like to bind the left mouse button to the rain tool and the right mouse button to the evaporate (dry) tool. I’m using Vrui 3.2 and Sandbox 1.6. Is that possible?

    -Steve

    in reply to: AR Sandbox installtion issues #102734

    Shot
    Participant

    Sure, Oliver, I will do that at the next opportunity.

    -Steve

    in reply to: AR Sandbox installtion issues #102726

    Shot
    Participant

    After the program spits out a bunch of those lines, it seems the software hangs shortly thereafter.

    To set the record straight, I now suspect a faulty memory module is to blame for the hang. That said, I’ve reverted back to Sandbox 1.6 and Vrui 3.2 because it works with only the projector connected. (Having an another monitor connected was not an option.)

    -Steve


    Shot
    Participant

    Did you include the -rer command line argument? You might want to read this post carefully.

    -Steve

Viewing 15 posts - 1 through 15 (of 25 total)