corner posts

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This topic contains 2 replies, has 3 voices, and was last updated by  benandersen 1 month, 2 weeks ago.

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  • #103526

    jjfoerch
    Participant

    Hello,

    I’m on a team buiding a portable AR sandbox, and our design has corner posts that sit within the rectangular sand area, as shown in this image:

    sandbox design

    What are the ramifications of a design like this on calibration step #4, where the corners are defined? Will we need to pick corner points at the inside of the notches for the posts, and then tweak the coordinates in BoxLayout.txt? Is there a way to mask off the posts so that SARndbox does not draw terrain on the posts? If that feature does not exist, would it be hard to program? (I could help with writing the patch if it seems achievable.)

    Thank you

    #103586

    David
    Participant

    Hello,
    i may be totally wrong here but as far as i know there is currently no built in way to crop the extend of the sandbox. The boxlayout file only affects water simulation, the software will always use and thus project the entire field of view of the kinect.
    One relatively simple solution for this problem would be to
    – take a screenshot of SARandbox in fullscreen
    – import screenshot into gimp
    – make a new layer and draw black boxes over parts you don´t want to project on
    – deactivate screenshot layer
    – export as .png (or any other transparent image format)
    – use an image viewer capable of displaying transparent images to overlay it over SARndbox
    – done – the projector will not project on the posts and they wont adversely affect water simulation since they are registered as mountains

    alternative: use a window manager that lets you draw on screen and automate that process

    i have not tried any of this myself and i am sure there are better solutions if you can alter the source code or write a tool to clip the box extend

    as for calibration, just pick two points for each corner, one with the correct x-coordinate and one with the correct y-coordinate and then choose the appropriate coordinate from each point. In my experience you will end up tweaking it manually anyways so don´t worry about it all too much.

    if you can, let us know how you handled the problem so others can learn from you; I´m actually quite curious how the built went along

    greetings,
    David

    #103612

    benandersen
    Participant

    I have posts on two corners and did setup as normal with no noticeable issues. I might suggest removing the two aesthetic pieces you have around the posts, as they are unnecessary for stability and only take away from your sandbox area.

    • This reply was modified 1 month, 2 weeks ago by  benandersen.
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