Fixed

• Fix diffusion velocity formula. It eliminates outlying vortices and spikes (noise) in resulting forces.

Changed

• Significantly refactor command-line UX and update README.

• Merge vvcompose functionality with vvflow. The symlink is preserved for the compatibility.

• Remove obsolete vvgen script. Its functions are performed by vvflow.

• Add gpquick --size option for adjusting image size.

• Write gpquick resulting image to the --output file instead of stdout.

• Add gpquick --dump-script option which prints the gnuplot sctipt to stdout.

• Revise manpages man vvflow, man vvxtract, man vvplot.

• Provide --help option for all commands in addition to manpages.

Added

• vvplot --eps option for fine-tuning streamlines, vorticity and
  pressure fields smoothing factor.

Fixed

• Building instructions.
• Compilation errors with GCC 13.

Added

• Savonius shape generation for vvcompose.
• Binary packages for ubuntu jammy (22.04).

Fixed

• Upload packages for ubuntu focal and groovy.
• Revise the readme.

Added

• New vvplot option -U for plotting a velocity field.
• New vvplot option --load-field for plotting side-prcessed fields.

Changed

• Replace libmatheval processor with Lua.
• Build (almost) all third-party libraries statically.
• Move CI from Bitbucket to the GitHub.
• Replace googletest testing framework with cppunit.

Fixed

• Segmentation fault in vvplot due to stack-use-after-scope bug.