Pointtracker on Linux and compiling errors

[waterlubber]

I've installed Opentrack on Arch Linux through the AUR package: https://aur.archlinux.org/packages/opentrack/

I have it working and it seems to be working fine. However, PointTracker does not appear in the list of input trackers. I have two working webcams on the system (/dev/video0 and /dev/video2) There is no notable output when running it in console.

How to I add the Pointtracker plugin? Should I just run this inside of WINE for use with Elite Dangerous?

Edit: It appears that the tracker-pt file is missing from the /usr/libexec/opentrack/ directory. How do I compile or get this? I can't get Opentrack working in WINE. (the webcam doesn't work)

[sthalik]

Edit: It appears that the tracker-pt file is missing from the /usr/libexec/opentrack/ directory. How do I compile or get this? I can't get Opentrack working in WINE. (the webcam doesn't work)

Make sure to set OpenCV_DIR in cmake cache.

[waterlubber]

It appears to be set correctly (in the CMakeCache.txt file in the cv/ directory), there is the following line:
OpenCV_DIR:PATH=/usr/lib/cmake/opencv4
and that directory has the files in it:

/usr/lib/cmake/opencv4/OpenCVConfig-version.cmake
/usr/lib/cmake/opencv4/OpenCVConfig.cmake
/usr/lib/cmake/opencv4/OpenCVModules-release.cmake
/usr/lib/cmake/opencv4/OpenCVModules.cmake

I then ran cmake with this command (which is almost certainly wrong):
OpenCV_DIR=/usr/lib/cmake/opencv4 cmake .. -GNinja -DCMAKE_BUILD_TYPE=Release -DSDK_WINE_PREFIX=/home/waterlubber/.wine -DCMAKE_INSTALL_PREFIX=~/.local/share -OpenCV_DIR=/usr/lib/cmake/opencv4

Cmake gave the following output: https://pastebin.com/xXwuBW5S
and then ninja. Ninja failed, with the following output: https://pastebin.com/EBNUCkV6

Are there any building instructions for this? I'm not very familiar with cmake at all and am generally just running random console commands at this point.

Edit: I edited the CMakeLists file and added the set() with the OpenCV dir, but I still got the same error.

Edit 2: I started again with a clean clone of the repo, and added the following like to CMakeLists.txt:
set(OpenCV_DIR "/usr/lib/cmake/opencv4")
It still failed with the same output (https://pastebin.com/bQ7snCvF)

What's odd is that the arch package compiles successfully (albeit without webcam support) using the following PKGBUILD:

# Maintainer: Sven-Hendrik Haase <svenstaro@gmail.com>
# Contributor: Maxime Morel <maxime@mmorel.eu>

pkgname=opentrack
pkgver=2.3.10
pkgrel=1
pkgdesc="Head tracking software"
arch=('x86_64')
url="https://github.com/opentrack/opentrack/"
license=('GPL3')
depends=('qt5-base' 'opencv')
makedepends=('cmake' 'xplane-sdk-devel' 'wine' 'ninja')
source=("https://github.com/opentrack/opentrack/archive/opentrack-$pkgver.tar.gz" "opentrack.desktop")
sha256sums=('f4934b66e78d3d5105634c473505f6ed4d6ab4a2d2d03181267295330a61eb9d'
            '96b4a633d40f399b927d159353cfaa679d2148156a3f04b5ea23b8d4b8e4bd3f')

build() {
  cd opentrack-opentrack-$pkgver

  mkdir -p build
  cd build

  # fix path for xplane plugin
  sed -i 's/..\/opentrack-compat\/export.hpp/..\/compat\/export.hpp/' ../x-plane-plugin/plugin.c
  mkdir -p xplane_sdk/CHeaders
  ln -sf /usr/include/xplane_sdk/Wrappers xplane_sdk/CHeaders/
  ln -sf /usr/include/xplane_sdk/Widgets xplane_sdk/CHeaders/
  ln -sf /usr/include/xplane_sdk/XPLM xplane_sdk/CHeaders/
  cmake .. \
      -GNinja \
      -DCMAKE_BUILD_TYPE=Release \
      -DSDK_XPLANE=xplane_sdk \
      -DSDK_WINE_PREFIX=/ \
      -DCMAKE_INSTALL_PREFIX=/usr
  ninja
}

package() {
  cd opentrack-opentrack-$pkgver/build
  DESTDIR="$pkgdir" ninja install

  install -Dm644 $srcdir/opentrack.desktop $pkgdir/usr/share/applications/opentrack.desktop
}

Edit 3: I cloned the repo again, changed CMakeList.txt as above, and made build and ran cmake .. successfully. make however still returns an error:
https://pastebin.com/pqc6JWh4

Edit 4: I can get it to build with -fpermissive, but whatever that kicks out still doesn't work (I get an "error loading opentrack-user-interface.so whenever I try to run whatever make spits out)

Edit 5: I tried the stable/2.3 branch but cmake didn't seem to detect OpenCV even with the option added to CMakeLists

[waterlubber]

So I've tried a few other things (compiling in different ways with and without OpenCV) but I still can't get it to sucessfully compile with OpenCV. If it makes a difference, I'm using OpenCV 4.0.1-6, should I use an older version like 4.0.0, 3.4.5, or 2.4.13?

[sthalik]

That error is unrelated to opencv. Pull from unstable and try again.

That pkgbuild should bump _pkgver.

[sthalik]

-fpermissive shouldn't be required under any circumstances. It should be fixed now.

If you're having problems with loading the app after that, I have some instructions.

[waterlubber]

Alright, I just compiled after cloning with:

mkdir build
cd build
cmake ..
make
make install

I set LD_LIBRARY PATH to build/install/libexec/opentrack (where all the libraries were) and ran it. I still did not see the video options:

Terminal output was as follows:

[/home/waterlubber/.local/share/src/opentrack/qxt-mini/qxtglobalshortcut.cpp:64]: qxt-mini: adding event filter
[/home/waterlubber/.local/share/src/opentrack/qxt-mini/qxtglobalshortcut_x11.cpp:349]: qxt-mini: fixed x11 autorepeat

I also tried the opentrack-git AUR package, which downloads from the repo, and it did not work either.

And here's the output of cmake and make: https://pastebin.com/EQJ6Vc3d
It looks like it isn't even trying to build the pointtracker library

If it helps, I have two webcams - a Logitech C310 and a PS3 Eye, both of which are currently working on this system (via UVC and ov534, respectively)

[sthalik]

Thanks for noticing this, especially so soon after the mistake was made 👍. I was able to reproduce this bug and fix it.

[sthalik]

@waterlubber,

should I use an older version like 4.0.0, 3.4.5, or 2.4.13?

Any version above 4.0 or some newer 3.x should work. I can't guarantee 2.x will work for all modules.

[waterlubber]

Thank you for all the help!
I can see and configure the PointTracker option, but now I'm experiencing a different issue (#930).