86 lines
3.5 KiB
Python
86 lines
3.5 KiB
Python
#***************************************************************************
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#* Copyright (c) 2014 Johan Kristensen *
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#* Copyright (c) 2014 Juergen Riegel <FreeCAD@juergen-riegel.net> *
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#* *
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#* This program is free software; you can redistribute it and/or modify *
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#* it under the terms of the GNU Lesser General Public License (LGPL) *
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#* as published by the Free Software Foundation; either version 2 of *
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#* the License, or (at your option) any later version. *
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#* for detail see the LICENCE text file. *
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#* *
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#* This program is distributed in the hope that it will be useful, *
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#* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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#* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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#* GNU Library General Public License for more details. *
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#* *
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#* You should have received a copy of the GNU Library General Public *
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#* License along with this program; if not, write to the Free Software *
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#* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 *
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#* USA *
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#* *
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#***************************************************************************
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import FreeCAD, FreeCADGui, Sketcher, Part, math
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__title__="Regular polygon profile lib"
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__author__ = "Johan Kristensen"
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__url__ = "http://www.freecadweb.org"
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App = FreeCAD
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Gui = FreeCADGui
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def makeRegularPolygon(
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sketch,
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sides,
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centerPoint=App.Vector(0,0,0),
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firstCornerPoint=App.Vector(-20.00,34.64,0),
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construction=False):
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if not sketch:
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App.Console.PrintError("No sketch specified in 'makeRegularPolygon'")
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return
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if sides < 3:
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App.Console.PrintError("Number of sides must be at least 3 in 'makeRegularPolygon'")
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return
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diffVec = firstCornerPoint - centerPoint
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diffVec.z = 0
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angular_diff = 2*math.pi/sides
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pointList = []
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for i in range(0,sides):
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cos_v = math.cos( angular_diff * i )
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sin_v = math.sin( angular_diff * i )
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pointList.append( centerPoint+
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App.Vector(
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cos_v * diffVec.x - sin_v * diffVec.y,
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cos_v * diffVec.y + sin_v * diffVec.x,
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0 ))
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geoList = []
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for i in range(0,sides-1):
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geoList.append(Part.LineSegment(pointList[i],pointList[i+1]))
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geoList.append(Part.LineSegment(pointList[sides-1],pointList[0]))
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geoList.append(Part.Circle(centerPoint,App.Vector(0,0,1),diffVec.Length))
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geoIndices = sketch.addGeometry(geoList,construction)
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sketch.setConstruction(geoIndices[-1],True)
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conList = []
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for i in range(0,sides-1):
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conList.append(Sketcher.Constraint(
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'Coincident',
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geoIndices[i],2,
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geoIndices[i+1],1))
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conList.append(Sketcher.Constraint(
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'Coincident',
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geoIndices[sides-1],2,
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geoIndices[0],1))
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for i in range(0,sides-1):
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conList.append(Sketcher.Constraint('Equal',geoIndices[0],geoIndices[i+1]))
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for i in range(0,sides):
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conList.append(Sketcher.Constraint('PointOnObject',geoIndices[i],2,geoIndices[-1]))
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sketch.addConstraint(conList)
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return
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