# Sketch - A Python-based interactive drawing program
# Copyright (C) 1998, 1999, 2000, 2003 by Bernhard Herzog
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Library General Public
# License as published by the Free Software Foundation; either
# version 2 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# Library General Public License for more details.
#
# You should have received a copy of the GNU Library General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA


###Sketch Config
#type = PluginCompound
#class_name = 'RegularPolygon'
#menu_text = 'Regular Polygon'
#parameters = (\
# ('vertices', 'int', 6, (3, None), 'Vertices'), \
# ('radius', 'length', 72.0, (0.0, None), 'Radius'))
#standard_messages = 1
###End

(''"Regular Polygon")
(''"Vertices")
(''"Radius")

from math import pi

from Sketch import Polar, TrafoPlugin, PolyBezier, CreatePath, ContAngle

class RegularPolygon(TrafoPlugin):

    class_name = 'RegularPolygon'
    is_curve = 1

    def __init__(self, vertices = 5, radius = 50.0, trafo = None, loading = 0,
                 duplicate = None):
        TrafoPlugin.__init__(self, trafo = trafo, duplicate = duplicate)
        if duplicate is not None:
            self.vertices = duplicate.vertices
            self.radius = duplicate.radius
        else:
            self.vertices = vertices
            self.radius = radius
        if not loading:
            self.recompute()

    def recompute(self):
        path = CreatePath()
        vertices = self.vertices
        radius = self.radius
        twopi = 2 * pi
        halfpi = pi / 2
        for i in range(vertices + 1):
            path.AppendLine(Polar(radius, (twopi * i) / vertices + halfpi),
                            ContAngle)
        path.ClosePath()
        path.Transform(self.trafo)
        if self.objects:
            self.objects[0].SetPaths((path,))
        else:
            self.set_objects([PolyBezier((path,))])

    def Vertices(self):
        return self.vertices

    def Radius(self):
        return self.radius

    def SaveToFile(self, file):
        TrafoPlugin.SaveToFile(self, file, self.vertices, self.radius,
                               self.trafo.coeff())

    def Info(self):
        return _("Regular Polygon: %(vertices)d vertices, "
                 "radius %(radius)[length]"), self.__dict__

    def AsBezier(self):
        return self.objects[0].AsBezier()

    def Paths(self):
        return self.objects[0].Paths()

