-- Copyright 2014 by Ida Bruhns -- -- This file may be distributed and/or modified -- -- 1. under the LaTeX Project Public License and/or -- 2. under the GNU Public License -- -- See the file doc/generic/pgf/licenses/LICENSE for more information --- This is the parent class for forces. It provides a constructor and methods -- stubs to be overwritten in the subclasses. -- Imports local lib = require "pgf.gd.lib" local ForceTemplate = lib.class {} -- constructor function ForceTemplate:constructor() self.force = self.force self.fw_attributes = self.fw_attributes if not self.force.time_fun then self.force.time_fun = function() return 1 end end end -- Method stub for preprocessing -- -- @param v The vertices the list will be build on function ForceTemplate:preprocess(v) end -- Method stub for applying the forces -- -- @param data A table holding data like the table the forces are collected -- in, the current iteration, the current time stamp, some options -- or the natural spring length function ForceTemplate:applyTo(data) end return ForceTemplate