unknown-horizons/unknown-horizons — pull request #1890 by hoffi (2012-09-28 19:10:58+00:00)
Title: Better way to display productions with multiple input resources

This is my implementation to show productions with multiple input resources (see Toolmaker or Smeltery) nicer.

The idea is to display it this way:

R ---+
.......|
R ---O--> R
.......|
R ---+