Forum Replies Created

Viewing 15 posts - 16 through 30 (of 53 total)
  • Author
    Posts
  • in reply to: USB Button Solution #111009

    liudr
    Participant

    Added elevation color mapping adjustment with a knob on the box:

    https://youtu.be/-qsQ5rXE8WI

    in reply to: How to display numbers with the contours? #111008

    liudr
    Participant

    So I worked on the electronics and now I have a knob to adjust the color map. Here are a few photos of the electronics and same sand but different color maps.

    in reply to: How to display numbers with the contours? #111007

    liudr
    Participant

    Oliver,

    I really appreciate your help. Your reply got me started. I got the named pipe working after some reading on what a named pipe is. It got me what I wanted but is not easy to integrate into GUI buttons. I wanted to have this feature included in the GUI. It took me a day to peel off the layers of code and finally zeroed in the code that updates the values from the named pipe, find a way to make changes to the height using buttons without running into problems of a struct that was defined internally in sandbox. Now my system will raise and lower the color mapping at the press of 5 and 6. Water simulation seems unaffected by the change of color. That’s what I wanted. You may have too much sand for oceans or too little for all the green land. You just have to adjust color mapping with a knob instead of adding/removing sand or changing a value in a file and rerun the simulation. Pushing buttons beats interacting with Linux for teaching/outreach. I’ll now make the electronics to simulate 5 and 6 using a knob up and down.

    John

    in reply to: How to display numbers with the contours? #111005

    liudr
    Participant

    Hey Oliver,

    Thanks for getting back to me with a clear answer. Are the contour lines created by SARndbox? I’m reading your code. It’s hard since I don’t know how your other code (kinect and VRui) works. From reading your code, I realized that dynamically changing the location of the height=0 plane is also going to be very difficult. The base height extracted from BoxLayout.txt is used a lots of function calls or instantiations. The program doesn’t have a main() so I suppose main() is inside VRui and compiled with SARndbox code. I was going to have two push buttons adjust the height of zero height since sometimes you have too much or too little sand. I think it’s going to be quite hard.

    John

    in reply to: How to upgrade Vrui and Kinect? #110960

    liudr
    Participant

    I found in the SARndbox 2.3 source code that some of the folders are pointing at the 4.2 version of VRui. I’ll give it a try to see if I can update them and compile it to run with VRui 4.3. It’s not easy to modify the source code. I wish there’s an update.

    in reply to: Projector option #110959

    liudr
    Participant

    I’ve used mx631st. It’s very nice. I’ve not used ms630st. Benq projectors have serial port command capabilities. You can turn them off or on eco mode when there is nobody at the sandbox, that is if you have sensors to detect people.

    in reply to: Projector option #110918

    liudr
    Participant

    Are you going to make a 30″ by 40″ sand box? If that is the case, then the throw ratio is too short. Your projector may be too close to the sand box and may cast a shadow over the field of view of your kinect sensor. I use throw ratio close to 1.0 projectors. This way the projector and kinect sensor are at the same height.

    in reply to: This configuration is enough ? #110913

    liudr
    Participant

    That looks pretty good to me. I have done a recent one with i5-7400 and GTX 1060 3G. Water seems fine although occasionally I see message of “running out of time”. It doesn’t bother me. The slowing down is not noticeable by anyone playing the sandbox.

    in reply to: How to upgrade Vrui and Kinect? #110902

    liudr
    Participant

    I cleaned and made sarndbox 2.3 again but still it wants files on Dr. Kreylos’ computer LOL There might be a newer version that’s not posted yet. I did everything I could. The Vrui 4.3 and Kinect 3.3 are working. I could run RawKinectViewer and extract plane and points. I couldn’t calibrate the projector as it is part of the Sarndbox program that I suspect needs an update as well.

    in reply to: USB Button Solution #110853

    liudr
    Participant

    OK, here is my detailed post regarding the USB button box I constructed. Hope it helps:

    My blog post

    in reply to: PC fails to boot when kinect is left plugged in USB port #108462

    liudr
    Participant

    OK, here is the box I built to delay USB connection to the PC for 10 seconds so Kinect won’t be detected by bios and cause freezing.

    Here is a photo of the adapter connected to the PC:

    Inside the box are an arduino and a relay shield.

    in reply to: small letters on KinectUtil getCalib #108461

    liudr
    Participant

    https://arsandbox.ucdavis.edu/forums/topic/config-utilities-ar-sandbox-micro-sized-menus/

    Had the same problem for a while. Forced me to memorize the location of the items on the menu 🙂 The above was provided to a similar post and works perfectly. Makes sense too.

    in reply to: VRui menu appears blurry #108460

    liudr
    Participant
    in reply to: CalibrateProjector termination #108459

    liudr
    Participant

    An xbox360 kinect is cheap enough on ebay. I wouldn’t wait for software release.

    in reply to: AR Sandbox post-installation setup #108363

    liudr
    Participant

    Awesome! Thanks for sharing. I have thought about Alienware Alpha. I’m glad that it works. I am considering the model with i3 instead of i5. When you are running the simulation with water flowing all over the place, how much cpu are you using anyway? I am doing ok with an i3-7100 with nvidia cards.

Viewing 15 posts - 16 through 30 (of 53 total)