Markus Lampert
211 lines
8.4 KiB
Python
211 lines
8.4 KiB
Python
# -*- coding: utf-8 -*-
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# ***************************************************************************
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# * *
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# * Copyright (c) 2018 sliptonic <shopinthewoods@gmail.com> *
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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
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import Part
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import Path
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import PathScripts.PathEngraveBase as PathEngraveBase
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import PathScripts.PathGeom as PathGeom
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import PathScripts.PathLog as PathLog
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import PathScripts.PathOp as PathOp
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import math
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from PySide import QtCore
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if True:
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PathLog.setLevel(PathLog.Level.DEBUG, PathLog.thisModule())
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PathLog.trackModule(PathLog.thisModule())
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else:
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PathLog.setLevel(PathLog.Level.INFO, PathLog.thisModule())
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# Qt tanslation handling
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def translate(context, text, disambig=None):
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return QtCore.QCoreApplication.translate(context, text, disambig)
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def orientWire(w, forward=True):
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face = Part.Face(w)
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cw = 0 < face.Surface.Axis.z
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if forward != cw:
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PathLog.track('orientWire - needs flipping')
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return PathGeom.flipWire(w)
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PathLog.track('orientWire - ok')
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return w
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def isCircleAt(edge, center):
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if Circel == type(edge.Curve) or ArcOfCircle == type(edge.Curve):
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return PathGeom.pointsCoincide(edge.Curve.Center, center)
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return False
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def offsetWire(wire, base, offset, forward):
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PathLog.track('offsetWire')
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w = wire.makeOffset2D(offset)
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if 1 == len(w.Edges):
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e = w.Edges[0]
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e.Placement = FreeCAD.Placement()
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w = Part.Wire(e)
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if wire.isClosed():
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if not base.isInside(w.Edges[0].Vertexes[0].Point, offset/2, True):
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PathLog.track('closed - outside')
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return orientWire(w, forward)
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PathLog.track('closed - inside')
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w = wire.makeOffset2D(-offset)
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return orientWire(w, forward)
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# An edge is considered to be inside of shape if the mid point is inside
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# Of the remaining edges we take the longest wire to be the engraving side
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# Looking for a circle with the start vertex as center marks and end
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# starting from there follow the edges until a circle with the end vertex as center is found
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# if the traversed edges include any oof the remainig from above, all those edges are remaining
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# this is to also include edges which might partially be inside shape
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# if they need to be discarded, split, that should happen in a post process
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# Depending on the Axis of the circle, and which side remains we know if the wire needs to be flipped
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# find edges that are not inside the shape
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def isInside(edge):
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if shape.Shape.isInside(edge.Vertexes[0].Point, offset/2, True) and shape.Shape.isInside(edge.Vertexes[-1].Point, offset/2, True):
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return True
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return False
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outside = [e for e in edges if not isInside(e)]
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# discard all edges that are not part of the longest wire
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longestWire = None
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for w in [Part.Wire(el) for el in Part.sortEdges(outside)]:
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if not longestWire or longestWire.Length < w.Length:
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longestWire = w
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# find the start and end point
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start = wire.Vertexes[0].Point
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end = wire.Vertexes[-1].Point
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collectLeft = False
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collectRight = False
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leftSideEdges = []
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rightSideEdges = []
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for e in (w.Edges + w.Edges):
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if isCircleAt(e, start):
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if PathGeom.pointsCoincide(e.Curve.Axis, FreeCAD.Vector(0, 0, 1)):
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if not collectLeft and leftSideEdges:
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break
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collectLeft = True
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collectRight = False
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else:
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if not collectRight and rightSideEdges:
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break
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collectLeft = False
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collectRight = True
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elif isCircleAt(e, end):
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if PathGeom.pointsCoincide(e.Curve.Axis, FreeCAD.Vector(0, 0, 1)):
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if not collectRight and rightSideEdges:
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break
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collectLeft = False
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collectRight = True
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else:
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if not collectLeft and leftSideEdges:
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break
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collectLeft = True
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collectRight = False
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elif collectLeft:
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leftSideEdges.append(e)
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elif collectRight:
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rightSideEdges.append(e)
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edges = leftSideEdges
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for e in longestWire.Edges:
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for e0 in rightSideEdges:
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if PathGeom.edgesMatch(e, e0):
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if forward:
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edges = [PathGeom.flipEdge(edge) for edge in rightSideEdges]
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return Part.Wire(edges)
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if not forward:
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edges = [PathGeom.flipEdge(edge) for edge in rightSideEdges]
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return Part.Wire(edges)
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class ObjectChamfer(PathEngraveBase.ObjectOp):
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'''Proxy class for Chamfer operation.'''
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def opFeatures(self, obj):
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return PathOp.FeatureTool | PathOp.FeatureHeights | PathOp.FeatureBaseEdges | PathOp.FeatureBaseFaces
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def initOperation(self, obj):
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obj.addProperty("App::PropertyDistance", "Width", "Chamfer", QtCore.QT_TRANSLATE_NOOP("PathChamfer", "The desired width of the chamfer"))
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obj.addProperty("App::PropertyDistance", "ExtraDepth", "Chamfer", QtCore.QT_TRANSLATE_NOOP("PathChamfer", "The additional depth of the tool path"))
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obj.addProperty("App::PropertyEnumeration", "Join", "Chamfer", QtCore.QT_TRANSLATE_NOOP("PathChamfer", "How to join chamfer segments"))
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obj.Join = ['Round', 'Miter']
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def opExecute(self, obj):
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angle = self.tool.CuttingEdgeAngle
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if 0 == angle:
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angle = 180
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tan = math.tan(math.radians(angle/2))
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toolDepth = 0 if 0 == tan else obj.Width.Value / tan
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extraDepth = obj.ExtraDepth.Value
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depth = toolDepth + extraDepth
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toolOffset = self.tool.FlatRadius
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extraOffset = self.tool.Diameter/2 - obj.Width.Value if 180 == angle else obj.ExtraDepth.Value / tan
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offset = toolOffset + extraOffset
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self.basewires = []
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self.adjusted_basewires = []
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wires = []
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for base, subs in obj.Base:
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edges = []
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basewires = []
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for f in subs:
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sub = base.Shape.getElement(f)
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if type(sub) == Part.Edge:
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edges.append(sub)
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elif sub.Wires:
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basewires.extend(sub.Wires)
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else:
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basewires.append(Part.Wire(sub.Edges))
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self.edges = edges
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for edgelist in Part.sortEdges(edges):
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basewires.append(Part.Wire(edgelist))
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self.basewires.extend(basewires)
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for w in self.adjustWirePlacement(obj, base, basewires):
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self.adjusted_basewires.append(w)
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wires.append(offsetWire(w, base.Shape, offset, True))
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self.wires = wires
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self.buildpathocc(obj, wires, [depth], True)
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def opSetDefaultValues(self, obj):
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obj.Width = '1 mm'
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obj.ExtraDepth = '0.1 mm'
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obj.Join = 'Round'
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def Create(name):
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'''Create(name) ... Creates and returns a Chamfer operation.'''
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obj = FreeCAD.ActiveDocument.addObject("Path::FeaturePython", name)
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proxy = ObjectChamfer(obj)
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return obj
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