82 lines
3.5 KiB
Python
82 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__ = "https://www.freecad.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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):
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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(
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centerPoint
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+ App.Vector(
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cos_v * diffVec.x - sin_v * diffVec.y, cos_v * diffVec.y + sin_v * diffVec.x, 0
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)
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)
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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("Coincident", geoIndices[i], 2, geoIndices[i + 1], 1))
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conList.append(Sketcher.Constraint("Coincident", geoIndices[sides - 1], 2, 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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