# -*- coding: utf-8 -*- # *************************************************************************** # * * # * Copyright (c) 2016 sliptonic * # * * # * This program is free software; you can redistribute it and/or modify * # * it under the terms of the GNU Lesser General Public License (LGPL) * # * as published by the Free Software Foundation; either version 2 of * # * the License, or (at your option) any later version. * # * for detail see the LICENCE text file. * # * * # * This program 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 program; if not, write to the Free Software * # * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 * # * USA * # * * # *************************************************************************** from __future__ import print_function import FreeCAD import Part import PathScripts.PathLog as PathLog import PathScripts.PathPocketBase as PathPocketBase import PathScripts.PathUtils as PathUtils from PySide import QtCore import numpy __title__ = "Path Mill Face Operation" __author__ = "sliptonic (Brad Collette)" __url__ = "http://www.freecadweb.org" __doc__ = "Class and implementation of Mill Facing operation." __contributors__ = "russ4262 (Russell Johnson)" __created__ = "2014" __scriptVersion__ = "1d usable" __lastModified__ = "2019-07-22 23:49 CST" PathLog.setLevel(PathLog.Level.INFO, PathLog.thisModule()) #PathLog.trackModule(PathLog.thisModule()) # Qt translation handling def translate(context, text, disambig=None): return QtCore.QCoreApplication.translate(context, text, disambig) class ObjectFace(PathPocketBase.ObjectPocket): '''Proxy object for Mill Facing operation.''' def initPocketOp(self, obj): '''initPocketOp(obj) ... create facing specific properties''' obj.addProperty("App::PropertyEnumeration", "BoundaryShape", "Face", QtCore.QT_TRANSLATE_NOOP("App::Property", "Shape to use for calculating Boundary")) obj.BoundaryShape = ['Perimeter', 'Boundbox', 'Stock'] obj.addProperty("App::PropertyBool", "ClearEdges", "Face", QtCore.QT_TRANSLATE_NOOP("App::Property", "Clear edges of surface (Only applicable to BoundBox)")) if not hasattr(obj, 'ExcludeRaisedAreas'): obj.addProperty("App::PropertyBool", "ExcludeRaisedAreas", "Face", QtCore.QT_TRANSLATE_NOOP("App::Property", "Exclude milling raised areas inside the face.")) def pocketInvertExtraOffset(self): return True def areaOpOnChanged(self, obj, prop): '''areaOpOnChanged(obj, prop) ... facing specific depths calculation.''' PathLog.track(prop) if prop == "StepOver" and obj.StepOver == 0: obj.StepOver = 1 # default depths calculation not correct for facing if prop == "Base": job = PathUtils.findParentJob(obj) if job: obj.OpStartDepth = job.Stock.Shape.BoundBox.ZMax if len(obj.Base) >= 1: print('processing') sublist = [] for i in obj.Base: o = i[0] for s in i[1]: sublist.append(o.Shape.getElement(s)) # If the operation has a geometry identified the Finaldepth # is the top of the bboundbox which includes all features. # Otherwise, top of part. obj.OpFinalDepth = Part.makeCompound(sublist).BoundBox.ZMax elif job: obj.OpFinalDepth = job.Proxy.modelBoundBox(job).ZMax def areaOpShapes(self, obj): '''areaOpShapes(obj) ... return top face''' # Facing is done either against base objects holeShape = None if obj.Base: PathLog.debug("obj.Base: {}".format(obj.Base)) faces = [] holes = [] holeEnvs = [] oneBase = [obj.Base[0][0], True] sub0 = getattr(obj.Base[0][0].Shape, obj.Base[0][1][0]) minHeight = sub0.BoundBox.ZMax for b in obj.Base: for sub in b[1]: shape = getattr(b[0].Shape, sub) if isinstance(shape, Part.Face): faces.append(shape) if shape.BoundBox.ZMin < minHeight: minHeight = shape.BoundBox.ZMin if oneBase[0] is not b[0]: oneBase[1] = False if numpy.isclose(abs(shape.normalAt(0, 0).z), 1): # horizontal face for wire in shape.Wires[1:]: if obj.ExcludeRaisedAreas is True: ip = self.isPocket(b[0], shape, wire) if ip is False: holes.append((b[0].Shape, wire)) else: holes.append((b[0].Shape, wire)) else: PathLog.error('The base subobject, "{0}," is not a face. Ignoring "{0}."'.format(sub)) if obj.ExcludeRaisedAreas is True and len(holes) > 0: for shape, wire in holes: f = Part.makeFace(wire, 'Part::FaceMakerSimple') env = PathUtils.getEnvelope(shape, subshape=f, depthparams=self.depthparams) holeEnvs.append(env) holeShape = Part.makeCompound(holeEnvs) PathLog.debug("Working on a collection of faces {}".format(faces)) planeshape = Part.makeCompound(faces) # If no base object, do planing of top surface of entire model else: planeshape = Part.makeCompound([base.Shape for base in self.model]) PathLog.debug("Working on a shape {}".format(obj.Label)) # Find the correct shape depending on Boundary shape. PathLog.debug("Boundary Shape: {}".format(obj.BoundaryShape)) bb = planeshape.BoundBox # Apply offset for clearing edges offset = 0; if obj.ClearEdges == True: offset = self.radius + 0.1 bb.XMin = bb.XMin - offset bb.YMin = bb.YMin - offset bb.XMax = bb.XMax + offset bb.YMax = bb.YMax + offset if obj.BoundaryShape == 'Boundbox': bbperim = Part.makeBox(bb.XLength, bb.YLength, 1, FreeCAD.Vector(bb.XMin, bb.YMin, bb.ZMin), FreeCAD.Vector(0, 0, 1)) env = PathUtils.getEnvelope(partshape=bbperim, depthparams=self.depthparams) if obj.ExcludeRaisedAreas is True and oneBase[1] is True: includedFaces = self.getAllIncludedFaces(oneBase[0], env, faceZ=minHeight) if len(includedFaces) > 0: includedShape = Part.makeCompound(includedFaces) includedEnv = PathUtils.getEnvelope(oneBase[0].Shape, subshape=includedShape, depthparams=self.depthparams) env = env.cut(includedEnv) elif obj.BoundaryShape == 'Stock': stock = PathUtils.findParentJob(obj).Stock.Shape env = stock if obj.ExcludeRaisedAreas is True and oneBase[1] is True: includedFaces = self.getAllIncludedFaces(oneBase[0], stock, faceZ=minHeight) if len(includedFaces) > 0: stockEnv = PathUtils.getEnvelope(partshape=stock, depthparams=self.depthparams) includedShape = Part.makeCompound(includedFaces) includedEnv = PathUtils.getEnvelope(oneBase[0].Shape, subshape=includedShape, depthparams=self.depthparams) env = stockEnv.cut(includedEnv) else: env = PathUtils.getEnvelope(partshape=planeshape, depthparams=self.depthparams) if holeShape is not None: PathLog.info("Processing holes...") holeEnv = PathUtils.getEnvelope(partshape=holeShape, depthparams=self.depthparams) newEnv = env.cut(holeEnv) return [(newEnv, False)] else: return [(env, False)] def areaOpSetDefaultValues(self, obj, job): '''areaOpSetDefaultValues(obj, job) ... initialize mill facing properties''' obj.StepOver = 50 obj.ZigZagAngle = 45.0 obj.ExcludeRaisedAreas = False obj.ClearEdges = False # need to overwrite the default depth calculations for facing if job and len(job.Model.Group) > 0: obj.OpStartDepth = job.Stock.Shape.BoundBox.ZMax obj.OpFinalDepth = job.Proxy.modelBoundBox(job).ZMax # If the operation has a geometry identified the Finaldepth # is the top of the bboundbox which includes all features. if len(obj.Base) >= 1: obj.OpFinalDepth = Part.makeCompound(obj.Base).BoundBox.ZMax def isPocket(self, b, f, w): e = w.Edges[0] for fi in range(0, len(b.Shape.Faces)): face = b.Shape.Faces[fi] for ei in range(0, len(face.Edges)): edge = face.Edges[ei] if e.isSame(edge) is True: if f is face: # Alternative: run loop to see if all edges are same pass # same source face, look for another else: if face.CenterOfMass.z < f.CenterOfMass.z: return True return False def getAllIncludedFaces(self, base, env, faceZ): included = [] eXMin = env.BoundBox.XMin eXMax = env.BoundBox.XMax eYMin = env.BoundBox.YMin eYMax = env.BoundBox.YMax # eZMin = env.BoundBox.ZMin eZMin = faceZ # eZMax = env.BoundBox.ZMax def isOverlap(fMn, fMx, eMn, eMx): if fMx > eMn: if fMx <= eMx: return True elif fMx >= eMx and fMn <= eMx: return True if fMn < eMx: if fMn >= eMn: return True elif fMn <= eMn and fMx >= eMn: return True return False for fi in range(0, len(base.Shape.Faces)): incl = False face = base.Shape.Faces[fi] fXMin = face.BoundBox.XMin fXMax = face.BoundBox.XMax fYMin = face.BoundBox.YMin fYMax = face.BoundBox.YMax # fZMin = face.BoundBox.ZMin fZMax = face.BoundBox.ZMax if fZMax > eZMin: if isOverlap(fXMin, fXMax, eXMin, eXMax) is True: if isOverlap(fYMin, fYMax, eYMin, eYMax) is True: incl = True if incl is True: included.append(face) return included def SetupProperties(): setup = PathPocketBase.SetupProperties() setup.append("BoundaryShape") setup.append("ExcludeRaisedAreas") setup.append("ClearEdges") return setup def Create(name, obj=None): '''Create(name) ... Creates and returns a Mill Facing operation.''' if obj is None: obj = FreeCAD.ActiveDocument.addObject("Path::FeaturePython", name) obj.Proxy = ObjectFace(obj, name) return obj