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  • in reply to: Tech Spec Questions #102318

    RodgerHoll
    Participant

    Based on the hardware I have experimented with to run the sandbox program. the PC you speced should work fine.

    I use a PC with Athlon X4 860K processor which is only slightly quicker than the E5620.

    You wont need the 12 GB ram, 2 is plenty (I use 4GB only because I don’t have a 2GB module)
    Drive space. you can fit the whole OS and sandbox on an 8GB flashdrive.

    Video. Dont skimp on the video. not sure a 950 will make you happy, it may run, but at the lower edge of what you need. a 970 or better.

    in reply to: Cheap Projector? #102274

    RodgerHoll
    Participant

    My Opinion only…

    400 Lumens is not very bright.

    You may be limited as to the size of the sand table based on the lumens, lens spread and focal length of that particular projector.

    Brightness aside, You are looking for a projector with a throw ratio close to 1.0 (or even < 1.0) (Throw Ratio ref link) slightly higher throw ratios may be able to be compensated for by adjusting the distance of the projector from the sand but then the structure to hold the projector has to be taller or reflected.

    Looks like that projector has a throw ratio around 2. You would have to mount the projector 2 times the width of the sand table above the sand surface.

    I would say that with all the effort and expense that you would need to put into the rest of the equipment and box, I would not try to save by getting that projector.

    in reply to: Dual Displays #102258

    RodgerHoll
    Participant

    Thank you for the info.

    in reply to: Dual Displays #102256

    RodgerHoll
    Participant

    Rob
    Just confirming that this is 2 separate sandboxes running side by side, 2 CPU’s… I can see the kinects and projectors.

    Looks like you have one of them running from a laptop. Could you share the specs on the laptop?

    Rodger

    in reply to: Reset calibration without resinstall? #102197

    RodgerHoll
    Participant

    Thanks Oliver.

    Not sure what the issue was, but a fresh install in a new directory fixed it. I have the old folder that has the issue archived.

    I did check the windows were run in full screen, and that the -fpv switch was present.

    My version of the sandbox travels to schools and events, and recently took a 300 mile trip to St Augustine Florida. The tower that holds the projector and sensor are removable and the tower comes apart into 2 pieces for easier transport and also so the box will fit through standard classroom doors.
    By design, the tower will reassemble and reattach within a few mm each time.

    I will typically check the calibration before disassembly and transport, then just do a sanity check after the box is reassembled and filled with sand. (my wife wont let me have sand in the box at home)
    The calibration always seems to be spot on when I fire it up.
    Next step USB buttons.. (still using keyboard)

    Thanks for the program, it definitely attracts people of all ages when running.

    Rodger

    in reply to: Minor software update #102177

    RodgerHoll
    Participant

    Trying to get the color map to load. I have the pipe working. tested it with waterAttentuation.

    when issuing the command “colorMap orig.cpt” the terminal window the sandbox is running in give and error.
    “Cannot read height color map orig.cpt due to exception IO::StandardFile: unable to open file orig.cpt for reading due to error 2”

    I take this means It cannot file the file. it is a copy of the default color map, I have tried placing it in the etc folder , in the share folder ?? where is it supposed to be located for the pipe command to work?

    I can load it via the command line options when it is in the etc folder.

    Rodger

    in reply to: The AR Sandbox World Map #102176

    RodgerHoll
    Participant

    Collier County Fair and Exposition Inc.
    Naples Florida 34120

    (26.2943575,-81.589093)

    Portable sandbox for use at events and schools.

    in reply to: Budget build. Is it possible? (long post) #101308

    RodgerHoll
    Participant

    Just my input, have not done extentive testing, but have tried a few different things along the way.

    1. CPU. the PC you are describing is more powerful than the ones I have used successfully. The lowest powered pc I have used is a dual core 2.6 Ghz with 2 Gb ram. I would not recommend any smaller and if you have alot of water this PC will slow down. The quad core (don’t recall the ghz) pc with 4GB ram that I used did not seem to have any problems.
    2. Graphics card. I am using the 750 Ti. Works really good in the quad core PC, but in the dual core it slows down with lots of water (Kids love the water) may be a buss speed thing, not sure. I would not try to skimp on the graphics card.
    3. Projector – With all the messing around I have done, as long as the projector will fill your box and not need to be elevated alot higher than the sensor where the sensor would cause a shadow, then no reason it would not work. I have seen pictures of a projector that was not short throw and was mounted horizontally then bounced off a mirror. Fyi… the sensor is typically mounted at a height above the sand that is approximately the same as the long dimension of the sandbox.
    4. Resolution. I use 1024 x 768. no need for higher resolution, the kinect sensor is only 640 x 480 I believe.

    4. Sand. My portable box is 32 inches by 42 inches. it uses 1.5 Cu Ft of sand. have not tried kinetic sand, nor the homemade recipes for it yet, but plan on doing that in the near future.

    in reply to: Contour lines doesnt match with topografic surface #101307

    RodgerHoll
    Participant

    Did you use the full range of possible sand heights when calibrating the box? I have found that if you use a larger range vertical difference during calibration (and more than one time through the calibration process) that it improves the accuracy of the projection.

    Based on your images It looks like you may need to run through the projector setup and calibration steps from the beginning again. also check that your projector and/or sensor are not moving.


    RodgerHoll
    Participant

    Here are some snapshots of a sandbox I just finish building. 3D printer came in handy for the mounting brackets.
    Kinect Sensor Mount
    Kinect Sensor Mount

    Sensor Tower Mount
    Kinect sensor mount

    Sandbox Sensor and Projector
    Sandbox Sensor and Projector

    Collier County Fair AR Sandbox
    Collier County Fair Sandbox

    • This reply was modified 3 years, 8 months ago by  RodgerHoll.
    • This reply was modified 3 years, 8 months ago by  RodgerHoll.
    • This reply was modified 3 years, 8 months ago by  RodgerHoll.
    in reply to: Calibration Reset is there any reason to? #101007

    RodgerHoll
    Participant

    Think I answered my own question.

    Yes, you can delete the ProjectorMatrix.dat file and reset the calibration.

    Why do it?
    I have moved the prototype around a few times, also have adjusted the sensor / projector alignment (not always on purpose) and found that it seems easier to just deleted the ProjectorMatrix.dat file and start the calibration over than to try and Recalibrate on top of existing calibration from when the projector and sensor were not in the same configuration. It takes fewer calibration iterations to get a good result when starting from scratch.

    My guess is that if you keep projector and sensor firmly aligned with each other, that this would not be the case.

    in reply to: No water #101006

    RodgerHoll
    Participant

    Jasper

    Oliver did say he had to drop support for Mac. so it could just be that it does not work on Mac any longer.

    Did you try to map a key and add water manually with the key?

    with the sandbox running,

    • press a key to map to (I use w)
    • when the menu comes up, mouse over the Manage water locally menu item at the bottom.
    • Release the key
    • press and release a second key to use to “Dry” water locally. (I use e )

    This should map the keys so that when you move the mouse over a spot and press the keys they will either add or remove water in a small (about 3 inch) circle.

    I suggest this to see if the problem you are having is the sensor not detecting your rain elevation, or if the Sarndbox program is not adding water. may help you to troubleshoot further.

    There is a command line option to turn water completely off as well. Maybe double check that you don’t have the water turned all the way off at the command line.

    in reply to: Kinect not detected by RawKinectViewer #101005

    RodgerHoll
    Participant

    not an expert here, learning myself…

    The only time I have seen this is when the kinect is not powered up or connected completely.

    When you power everything up, do you have a green light on the front of the kinect? I have the xbox 360 version and the AC adapter. It has a green flashing light on the front when it is powered up correctly.

    I do believe the ac adapter is required for the sensor to work on PC’s not just to adapt the usb types, but to provide power as well.

    in reply to: Alternate Download location #100947

    RodgerHoll
    Participant

    Thank You Sir. Looking forward to seeing the kids (and parents) reactions and how we can use this to help them understand the Florida everglades watershed and how it plays an important role in the horticulture and agriculture of south florida.

Viewing 14 posts - 1 through 14 (of 14 total)