# -*- coding: utf-8 -*- # *************************************************************************** # * Copyright (c) 2017 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 PySide.QtCore import QT_TRANSLATE_NOOP import FreeCAD import Path import Path.Op.Base as PathOp import Path.Op.PocketBase as PathPocketBase # lazily loaded modules from lazy_loader.lazy_loader import LazyLoader Part = LazyLoader("Part", globals(), "Part") TechDraw = LazyLoader("TechDraw", globals(), "TechDraw") math = LazyLoader("math", globals(), "math") PathUtils = LazyLoader("PathScripts.PathUtils", globals(), "PathScripts.PathUtils") FeatureExtensions = LazyLoader("Path.Op.FeatureExtension", globals(), "Path.Op.FeatureExtension") __title__ = "CAM Pocket Shape Operation" __author__ = "sliptonic (Brad Collette)" __url__ = "https://www.freecad.org" __doc__ = "Class and implementation of shape based Pocket operation." if False: Path.Log.setLevel(Path.Log.Level.DEBUG, Path.Log.thisModule()) Path.Log.trackModule(Path.Log.thisModule()) else: Path.Log.setLevel(Path.Log.Level.INFO, Path.Log.thisModule()) class ObjectPocket(PathPocketBase.ObjectPocket): """Proxy object for Pocket operation.""" def areaOpFeatures(self, obj): return super(self.__class__, self).areaOpFeatures(obj) | PathOp.FeatureLocations def initPocketOp(self, obj): """initPocketOp(obj) ... setup receiver""" if not hasattr(obj, "UseOutline"): obj.addProperty( "App::PropertyBool", "UseOutline", "Pocket", QT_TRANSLATE_NOOP("App::Property", "Uses the outline of the base geometry."), ) FeatureExtensions.initialize_properties(obj) def areaOpOnDocumentRestored(self, obj): """opOnDocumentRestored(obj) ... adds the UseOutline property if it doesn't exist.""" self.initPocketOp(obj) def pocketInvertExtraOffset(self): return False def areaOpSetDefaultValues(self, obj, job): """areaOpSetDefaultValues(obj, job) ... set default values""" obj.StepOver = 100 obj.ZigZagAngle = 45 obj.UseOutline = False FeatureExtensions.set_default_property_values(obj, job) def areaOpShapes(self, obj): """areaOpShapes(obj) ... return shapes representing the solids to be removed.""" Path.Log.track() self.removalshapes = [] # self.isDebug = True if Path.Log.getLevel(Path.Log.thisModule()) == 4 else False self.removalshapes = [] avoidFeatures = list() # Get extensions and identify faces to avoid extensions = FeatureExtensions.getExtensions(obj) for e in extensions: if e.avoid: avoidFeatures.append(e.feature) if obj.Base: Path.Log.debug("base items exist. Processing...") self.horiz = [] self.vert = [] for base, subList in obj.Base: for sub in subList: if "Face" in sub: if sub not in avoidFeatures and not self.clasifySub(base, sub): Path.Log.error( "Pocket does not support shape {}.{}".format(base.Label, sub) ) # Convert horizontal faces to use outline only if requested if obj.UseOutline and self.horiz: horiz = [Part.Face(f.Wire1) for f in self.horiz] self.horiz = horiz # Check if selected vertical faces form a loop if len(self.vert) > 0: self.vertical = Path.Geom.combineConnectedShapes(self.vert) self.vWires = [ TechDraw.findShapeOutline(shape, 1, FreeCAD.Vector(0, 0, 1)) for shape in self.vertical ] for wire in self.vWires: w = Path.Geom.removeDuplicateEdges(wire) face = Part.Face(w) # face.tessellate(0.1) if Path.Geom.isRoughly(face.Area, 0): Path.Log.error("Vertical faces do not form a loop - ignoring") else: self.horiz.append(face) # Add faces for extensions self.exts = [] for ext in extensions: if not ext.avoid: wire = ext.getWire() if wire: faces = ext.getExtensionFaces(wire) for f in faces: self.horiz.append(f) self.exts.append(f) # check all faces and see if they are touching/overlapping and combine and simplify self.horizontal = Path.Geom.combineHorizontalFaces(self.horiz) # Move all faces to final depth less buffer before extrusion # Small negative buffer is applied to compensate for internal significant digits/rounding issue if self.job.GeometryTolerance.Value == 0.0: buffer = 0.000001 else: buffer = self.job.GeometryTolerance.Value / 10.0 for h in self.horizontal: h.translate( FreeCAD.Vector(0.0, 0.0, obj.FinalDepth.Value - h.BoundBox.ZMin - buffer) ) # extrude all faces up to StartDepth plus buffer and those are the removal shapes extent = FreeCAD.Vector(0, 0, obj.StartDepth.Value - obj.FinalDepth.Value + buffer) self.removalshapes = [ (face.removeSplitter().extrude(extent), False) for face in self.horizontal ] else: # process the job base object as a whole Path.Log.debug("processing the whole job base object") self.outlines = [ Part.Face(TechDraw.findShapeOutline(base.Shape, 1, FreeCAD.Vector(0, 0, 1))) for base in self.model ] stockBB = self.stock.Shape.BoundBox self.bodies = [] for outline in self.outlines: outline.translate(FreeCAD.Vector(0, 0, stockBB.ZMin - 1)) body = outline.extrude(FreeCAD.Vector(0, 0, stockBB.ZLength + 2)) self.bodies.append(body) self.removalshapes.append((self.stock.Shape.cut(body), False)) # Tessellate all working faces # for (shape, hole) in self.removalshapes: # shape.tessellate(0.05) # originally 0.1 if self.removalshapes: obj.removalshape = Part.makeCompound([tup[0] for tup in self.removalshapes]) return self.removalshapes # Support methods def isVerticalExtrusionFace(self, face): fBB = face.BoundBox if Path.Geom.isRoughly(fBB.ZLength, 0.0): return False extr = face.extrude(FreeCAD.Vector(0.0, 0.0, fBB.ZLength)) if hasattr(extr, "Volume"): if Path.Geom.isRoughly(extr.Volume, 0.0): return True return False def clasifySub(self, bs, sub): """clasifySub(bs, sub)... Given a base and a sub-feature name, returns True if the sub-feature is a horizontally oriented flat face. """ face = bs.Shape.getElement(sub) if type(face.Surface) == Part.Plane: Path.Log.debug("type() == Part.Plane") if Path.Geom.isVertical(face.Surface.Axis): Path.Log.debug(" -isVertical()") # it's a flat horizontal face self.horiz.append(face) return True elif Path.Geom.isHorizontal(face.Surface.Axis): Path.Log.debug(" -isHorizontal()") self.vert.append(face) return True else: return False elif type(face.Surface) == Part.Cylinder and Path.Geom.isVertical(face.Surface.Axis): Path.Log.debug("type() == Part.Cylinder") # vertical cylinder wall if any(e.isClosed() for e in face.Edges): Path.Log.debug(" -e.isClosed()") # complete cylinder circle = Part.makeCircle(face.Surface.Radius, face.Surface.Center) disk = Part.Face(Part.Wire(circle)) disk.translate(FreeCAD.Vector(0, 0, face.BoundBox.ZMin - disk.BoundBox.ZMin)) self.horiz.append(disk) return True else: Path.Log.debug(" -none isClosed()") # partial cylinder wall self.vert.append(face) return True elif type(face.Surface) == Part.SurfaceOfExtrusion: # extrusion wall Path.Log.debug("type() == Part.SurfaceOfExtrusion") # Save face to self.horiz for processing or display error if self.isVerticalExtrusionFace(face): self.vert.append(face) return True else: Path.Log.error("Failed to identify vertical face from {}".format(sub)) else: Path.Log.debug(" -type(face.Surface): {}".format(type(face.Surface))) return False # Eclass def SetupProperties(): setup = PathPocketBase.SetupProperties() # Add properties from PocketBase module setup.extend(FeatureExtensions.SetupProperties()) # Add properties from Extensions Feature # Add properties initialized here in PocketShape setup.append("UseOutline") return setup def Create(name, obj=None, parentJob=None): """Create(name) ... Creates and returns a Pocket operation.""" if obj is None: obj = FreeCAD.ActiveDocument.addObject("Path::FeaturePython", name) obj.Proxy = ObjectPocket(obj, name, parentJob) return obj return obj