Psychtoolbox 3.0.19.9 release "Tag games"

Psychtoolbox 3.0.19 Beta update "Tag games" was released at 16th March 2024.
As usual, the complete development history can be found in our GitHub repository.
The release tag is “3.0.19.9”, with the full tree and commit logs under the URL:

https://github.com/Psychtoolbox-3/Psychtoolbox-3/tree/3.0.19.9

Compatibility changes wrt. Psychtoolbox 3.0.19.8:

• None

Highlights:

• Experimental Apriltags fiducial marker tracking support on Linux.

All:

• New helper function PsychCamIntrinsicsToGLProjectionMatrix().
  Given camera intrinsic parameters from some camera calibration software,
  and the desired zNear and zFar clipping planes of the view frustum,
  compute and return a projection matrix for use as GL_PROJECTION_MATRIX
  for OpenGL rendering with a virtual pinhole camera that approximates the
  properties of the real camera.

Linux:

• Psychtoolbox was built and lightly tested against Matlab R2023b.

• (Re-)add PsychCV() mex file for Octave and Matlab, with support for
  vision based tracking of AprilTag fiducial markers (aka tags) by use
  of the apriltag library. This PsychCV mex file will only work on
  Ubuntu 22.04-LTS and later, not on Ubuntu 20.04-LTS anymore.