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SheetMetalCmd.py
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# -*- coding: utf-8 -*-
###################################################################################
#
# SheetMetalCmd.py
#
# Copyright 2015 Shai Seger <shaise at gmail dot com>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
# MA 02110-1301, USA.
#
#
###################################################################################
import FreeCAD, Part, math
import SheetMetalTools
from PySide import QtCore, QtGui
# IMPORTANT: please remember to change the element map version in case of any
# changes in modeling logic
smElementMapVersion = "sm1."
smEpsilon = SheetMetalTools.smEpsilon
# list of properties to be saved as defaults
smAddWallDefaultVars = [
"BendType",
"LengthSpec",
("angle", "defaultAngle"),
("radius", "defaultRadius"),
"AutoMiter",
("kfactor", "defaultKFactor")
]
translate = FreeCAD.Qt.translate
def GetSMComparisonFace (smObj, smSelItemName): # Calculations for Angle and Offset face reference modes
"""
Find the sheet metal face reference to find the angle and offset with another face.
Find the thickness edge coincident with sheet metal reference face.
Find the thickness face.
Parameters:
smObj: sheet metal part.
smSelItemName: selected item to create the wall/flange (can be face or edge).
Returns:
FaceReference, ThicknessEdgeCoincident, ThicknessFace
"""
smSelItem = smObj.Shape.getElement(smSelItemName)
smObj = smObj.Shape
thickness = sheet_thk(smObj,smSelItemName)[0]
thickness = round(thickness, 4)
def faces_with_edge(obj, edge):
"""
Finds all faces in the given object that contain the specified edge.
Parameters:
obj: The FreeCAD object to analyze.
edge: The specific edge to search for.
Returns:
FacesWithEdge(list)
"""
faces_with_edge = []
for face in obj.Faces:
for edgeFace in face.Edges:
if edgeFace.isSame(edge):
faces_with_edge.append(face)
return faces_with_edge
def facesConnectedToFace(obj, smThkFace):
"""
Finds all faces in the given object that are connected to the given face.
Parameters:
obj: The FreeCAD object to analyze.
smThkFace: The specific face to find connected faces to.
Returns:
FacesConnectedToface(list)
"""
smFaces = obj.Faces
faces_connected_to = []
for edge1 in smThkFace.Edges:
for face in smFaces:
# Ensure the face is not the same as the selected face by comparing geometry
if face.isSame(smThkFace):
continue
# Check if the face shares the same edge
for edge2 in face.Edges:
if edge1.isSame(edge2):
if face not in faces_connected_to:
faces_connected_to.append(face)
break # Stop checking other edges of this face since it's already added
return faces_connected_to
# Get relevant faces on the object:
if type(smSelItem) == Part.Face: # Use a face as reference since it's was possible on past version
faces = facesConnectedToFace(smObj, smSelItem)
thkFace = smSelItem
else:
faces = faces_with_edge(smObj, smSelItem)
# Find pairs of parallel faces
smAllFaces = smObj.Faces
parallel_faces = []
for i, face1 in enumerate(smAllFaces):
for j, face2 in enumerate(smAllFaces):
if i >= j:
continue
if face1.normalAt(0, 0).isEqual(face2.normalAt(0, 0).multiply(-1), 1e-6):
distance_info = face1.distToShape(face2)
distance = distance_info[0]
if abs(distance - thickness) <= 1e-5:
parallel_faces.extend([face1, face2])
parallel_faces = Part.Shell(parallel_faces)
# Get only the relevant parallel faces:
if type(smSelItem) == Part.Face: # Use a face as reference since it's was possible on past version
newParFaces = []
for edge1 in smSelItem.Edges:
for face in parallel_faces.Faces:
for edge2 in face.Edges:
if edge1.isSame(edge2):
newParFaces.append(face)
else:
for face1 in faces:
for face2 in parallel_faces.Faces:
if face1.isEqual(face2):
oneParFace = face1
normal_vector = oneParFace.normalAt(0,0).normalize()
for face in parallel_faces.Faces:
if normal_vector.isEqual(face.normalAt(0, 0).normalize().multiply(-1), 1e-6): # Test to find a face with opposite normal
distance = oneParFace.distToShape(face)[0]
if abs(distance - thickness) <= 1e-5:
try: # Is necessary 'try' and 'except','cause rounded surfaces offset can lead to errors if offset is bigger than it's radius
checkFace = face.makeOffsetShape(-distance, 0)
checkCut = oneParFace.cut(checkFace)
if checkCut.Area < 1e-6: # Test to ensure the opposite face is, in fact, the other side of the sheet metal part
otherParFace = face
extFace = otherParFace # Get sheet metal face for comparison with the reference face
except:
continue
newParFaces = [oneParFace, otherParFace]
for face in faces:
if face.isEqual(newParFaces[0]) or face1.isEqual(newParFaces[1]):
pass
else:
thkFace = face # Get the thickness face
# Get sheet metal face for comparison with the reference face
if type(smSelItem) == Part.Face: # Use a face as reference since it's was possible on past version
refVector = FreeCAD.Vector(0,0,0)
centerA = newParFaces[0].BoundBox.Center
centerB = newParFaces[1].BoundBox.Center
distA = centerA.distanceToPoint(refVector)
distB = centerB.distanceToPoint(refVector)
if distA > distB:
extFace = newParFaces[0]
refVectorXY = FreeCAD.Vector(extFace.normalAt(0,0).x, extFace.normalAt(0,0).y, 0)
angleTest = math.degrees(extFace.normalAt(0,0).getAngle(refVectorXY))
refVectorZ = FreeCAD.Vector(0,0,extFace.normalAt(0,0).z)
angleTestZ = math.degrees(extFace.normalAt(0,0).getAngle(refVectorZ))
extFaceNormal = False
if extFace.normalAt(0,0).x <= 0 and extFace.normalAt(0,0).y <= 0:
extFaceNormal = True
elif extFace.normalAt(0,0).x >= 0 and extFace.normalAt(0,0).y >= 0:
extFaceNormal = True
if extFaceNormal == True and ((angleTest == 0.0 or angleTest == 180) or (angleTestZ == 0.0 or angleTestZ == 180)):
extFace = newParFaces[1]
if thkFace.Orientation == "Reversed":
extFace = newParFaces[0]
elif distA < distB:
extFace = newParFaces[1]
refVectorXY = FreeCAD.Vector(extFace.normalAt(0,0).x, extFace.normalAt(0,0).y, 0)
angleTest = math.degrees(extFace.normalAt(0,0).getAngle(refVectorXY))
refVectorZ = FreeCAD.Vector(0,0,extFace.normalAt(0,0).z)
angleTestZ = math.degrees(extFace.normalAt(0,0).getAngle(refVectorZ))
extFaceNormal = False
if extFace.normalAt(0,0).x <= 0 and extFace.normalAt(0,0).y <= 0:
extFaceNormal = True
elif extFace.normalAt(0,0).x >= 0 and extFace.normalAt(0,0).y >= 0:
extFaceNormal = True
if extFaceNormal == True and ((angleTest == 0.0 or angleTest == 180) or (angleTestZ == 0.0 or angleTestZ == 180)):
extFace = newParFaces[0]
if thkFace.Orientation == "Reversed":
extFace = newParFaces[0]
if distA == distB:
valueA = centerA.x + centerA.y + centerA.z
valueB = centerB.x + centerB.y + centerB.z
if valueA < valueB:
extFace = newParFaces[0]
refVectorXY = FreeCAD.Vector(extFace.normalAt(0,0).x, extFace.normalAt(0,0).y, 0)
angleTest = math.degrees(extFace.normalAt(0,0).getAngle(refVectorXY))
refVectorZ = FreeCAD.Vector(0,0,extFace.normalAt(0,0).z)
angleTestZ = math.degrees(extFace.normalAt(0,0).getAngle(refVectorZ))
extFaceNormal = False
if extFace.normalAt(0,0).x <= 0 and extFace.normalAt(0,0).y <= 0:
extFaceNormal = True
elif extFace.normalAt(0,0).x >= 0 and extFace.normalAt(0,0).y >= 0:
extFaceNormal = True
if extFaceNormal == True and ((angleTest == 0.0 or angleTest == 180) or (angleTestZ == 0.0 or angleTestZ == 180)):
extFace = newParFaces[1]
if thkFace.Orientation == "Reversed":
extFace = newParFaces[0]
else:
extFace = newParFaces[1]
refVectorXY = FreeCAD.Vector(extFace.normalAt(0,0).x, extFace.normalAt(0,0).y, 0)
angleTest = math.degrees(extFace.normalAt(0,0).getAngle(refVectorXY))
refVectorZ = FreeCAD.Vector(0,0,extFace.normalAt(0,0).z)
angleTestZ = math.degrees(extFace.normalAt(0,0).getAngle(refVectorZ))
extFaceNormal = False
if extFace.normalAt(0,0).x <= 0 and extFace.normalAt(0,0).y <= 0:
extFaceNormal = True
elif extFace.normalAt(0,0).x >= 0 and extFace.normalAt(0,0).y >= 0:
extFaceNormal = True
if extFaceNormal == True and ((angleTest == 0.0 or angleTest == 180) or (angleTestZ == 0.0 or angleTestZ == 180)):
extFace = newParFaces[0]
if thkFace.Orientation == "Reversed":
extFace = newParFaces[0]
thkFace = smSelItem # Get thickness face
# Get the edge coincident between the sheet metal face reference and the thickness face:
for edge1 in extFace.Edges:
for edge2 in thkFace.Edges:
if edge1.isSame(edge2):
thkEdge = edge2
return extFace, thkEdge, thkFace
def offsetFaceDistance (smFace, refFace, refEdge, thkFace): # Calculations for Offset face reference mode
"""
Calculate the distance between the intersection of the planes of sheet metal object and the edge of face thickness.
Parameters:
smFace: sheet metal surface that is opposite the wall
refFace: any reference surface
refEdge: edge that is coincident with thkFace and the smFace
thkFace: face of the thickness where the wall gonna be
Returns:
OffsetDistance (can be positive or negative value)
"""
def get_lowest_normal_distance_to_line(face, infinite_line):
"""
Calculate the lowest normal distance from a face to an infinite line.
Parameters:
face (Part.Face): The face object.
infinite_line (Part.Line): The infinite line object.
Returns:
float: The lowest normal distance.
"""
# Find the closest point on the face to the infinite line
closest_point_face = face.distToShape(infinite_line.toShape())[1][0][0]
# Get the normal vector at the closest point on the face
u, v = face.Surface.parameter(closest_point_face)
normal = face.normalAt(u, v)
# Create a line along the normal direction
normal_line = Part.Line(closest_point_face, closest_point_face.add(normal))
# Find the intersection of the normal line with the infinite line
intersection = normal_line.toShape().distToShape(infinite_line.toShape())
intersection_point = intersection[1][0][0] # Closest point on the infinite line
# Calculate the distance between the closest point and the intersection point
distance = closest_point_face.distanceToPoint(intersection_point)
return distance
# Create planes from smFace and refFace
smPlane = Part.Plane(smFace.CenterOfMass, smFace.normalAt(0,0))
refPlane = Part.Plane(refFace.CenterOfMass, refFace.normalAt(0,0))
interLine = smPlane.intersect(refPlane)[0] # Intersection line between the planes of sheet metal and the reference
offsetDist = get_lowest_normal_distance_to_line(thkFace, interLine) # Get the distance between the intersection of the planes and the edge
# Test if is necessary negative offset:
negOff = False
refFaceNormal = refFace.normalAt(0,0).normalize()
thkFaceNormal = thkFace.normalAt(0,0).normalize()
denom = refFaceNormal.dot(thkFaceNormal)
if abs(denom) < 1e-6:
negOff = True
if refFaceNormal.dot(refFace.BoundBox.Center - thkFace.BoundBox.Center)/denom < 0:
negOff = True
if negOff == True:
offsetDist = -offsetDist
offsetDist = round(offsetDist,6)
return offsetDist
def relatAngleCalc (thkFace, refEdge, refFace, smFace): # Calculations for Angle and Offset face reference modes
"""
Find the relative angle to apply for a sheet metal wall (aka flange),
considering the thickness where the wall gonna be, the edge opposite to the wall bend side,
the face that the wall gonna be parallel to and the sheet metal face side in opposition to
the wall bend side.
Parameters:
thkFace: thickness attached to the created wall
refEdge: edge commom to thkFace and to a sheet metal face side
refFace: a face used as reference for bend angle
smFace: a sheet metal face side in opposition to the wall bend side wich has a edge common with thkFace
Returns:
angleParFace: angle between the refFace and the smFace
"""
try: # Get the face for 3D angle:
# Get the edge perpendicular to sheet metal side face
normalEdges = []
for edge1 in thkFace.Edges:
edgeAvert1, edgeAvert2 = refEdge.Vertexes
edgeBvert1, edgeBvert2 = edge1.Vertexes
vecAng1 = edgeAvert1.Point - edgeAvert2.Point
vecAng2 = edgeBvert1.Point - edgeBvert2.Point
if math.degrees(vecAng1.getAngle(vecAng2)) == 90:
normalEdges.append(edge1)
# Create one face as reference to project a line that represents the correct angle between the sheet metal and reference face
rotFace = thkFace.copy()
rotEdge = normalEdges[0]
rotAx3Dang = rotEdge.Vertexes[1].Point - rotEdge.Vertexes[0].Point
rotFace.rotate(rotEdge.Vertexes[0].Point, rotAx3Dang, 90)
projPlane = Part.Plane(rotFace.CenterOfMass, rotFace.normalAt(0,0).normalize())
refPlane = Part.Plane(refFace.CenterOfMass, refFace.normalAt(0,0).normalize())
angEdge = refFace.common(projPlane.intersect(refPlane)[0], 1e-6) # Edge that represents the correct angle
# Create a plane rotated at correct angle to be used to angle calculation after
refAngPlane = projPlane.copy()
rotAx3Dang = angEdge.Vertexes[1].Point - angEdge.Vertexes[0].Point
rotPlac = FreeCAD.Placement(rotEdge.Vertexes[0].Point, rotAx3Dang, 90)
refAngPlane.rotate(rotPlac)
refFaceNormal = refAngPlane.normal(0,0).normalize()
except:
refFaceNormal = refFace.normalAt(0,0).normalize()
smFaceNor = smFace.normalAt(0,0).normalize()
thkFaceNor = thkFace.normalAt(0,0).normalize()
if refFaceNormal.isEqual(smFaceNor, 1e-6) or refFaceNormal.isEqual(-smFaceNor, 1e-6):
angleParFace = 180
else:
if thkFaceNor.getAngle(refFaceNormal) < thkFaceNor.getAngle(-refFaceNormal):
refNormal = refFaceNormal
else:
refNormal = -refFaceNormal
angleParFace = smFaceNor.getAngle(refNormal)
angleParFace = round(math.degrees(angleParFace),6)
return angleParFace
def smStrEdge(e):
return (
"["
+ str(e.valueAt(e.FirstParameter))
+ " , "
+ str(e.valueAt(e.LastParameter))
+ "]"
)
def smMakeReliefFace(edge, dir, gap, reliefW, reliefD, reliefType, op=""):
p1 = edge.valueAt(edge.FirstParameter + gap)
p2 = edge.valueAt(edge.FirstParameter + gap + reliefW)
if reliefType == "Round": #and reliefD >= (reliefW / 2.0):
e1 = Part.makeLine(p1, p2)
p34 = (
edge.valueAt(edge.FirstParameter + gap + reliefW / 2)
+ dir.normalize() * reliefD
)
if (reliefD - (reliefW / 2.0)) < smEpsilon:
e3 = Part.Arc(p1, p34, p2).toShape()
w = Part.Wire([e1, e3])
else:
p3 = edge.valueAt(edge.FirstParameter + gap + reliefW) + dir.normalize() * (
reliefD - reliefW / 2
)
p4 = edge.valueAt(edge.FirstParameter + gap) + dir.normalize() * (
reliefD - reliefW / 2
)
e2 = Part.makeLine(p2, p3)
e3 = Part.Arc(p3, p34, p4).toShape()
e4 = Part.makeLine(p4, p1)
w = Part.Wire([e1, e2, e3, e4])
else:
p3 = (
edge.valueAt(edge.FirstParameter + gap + reliefW)
+ dir.normalize() * reliefD
)
p4 = edge.valueAt(edge.FirstParameter + gap) + dir.normalize() * reliefD
e1 = Part.makeLine(p1, p2)
e2 = Part.makeLine(p2, p3)
e3 = Part.makeLine(p3, p4)
e4 = Part.makeLine(p4, p1)
w = Part.Wire([e1, e2, e3, e4])
face = Part.Face(w)
if hasattr(face, "mapShapes"):
face.mapShapes([(edge, face)], [], op)
return face
def smMakePerforationFace(
edge,
dir,
bendR,
bendA,
perforationAngle,
flipped,
extLen,
gap1,
gap2,
lenIPerf1,
lenIPerf2,
lenPerf,
lenNPerf,
op="",
):
L0 = (edge.LastParameter - gap2 - lenIPerf2) - (edge.FirstParameter + gap1 + lenIPerf1)
Lp = lenPerf
Ln = lenNPerf
P0 = (L0-Ln) / (Lp+Ln)
P = math.ceil(P0)
N = P+1
F = L0 / (math.ceil(P0)*Lp + math.ceil(P0)*Ln + Ln)
if perforationAngle == 0:
perforationAngle = bendA
extAngle = (perforationAngle - bendA) / 2;
S = (1 / math.cos(extAngle * (2*math.pi/360)))
pivotL = -bendR
swingL = extLen + (S-1)*(bendR+extLen)
if not flipped:
pivotL = extLen - pivotL
swingL = extLen - swingL
# Initial perf, near
p1 = edge.valueAt(edge.FirstParameter + gap1) + dir.normalize() * pivotL
p2 = edge.valueAt(edge.FirstParameter + gap1 + lenIPerf1) + dir.normalize() * pivotL
p3 = edge.valueAt(edge.FirstParameter + gap1 + lenIPerf1) + dir.normalize() * swingL
p4 = edge.valueAt(edge.FirstParameter + gap1) + dir.normalize() * swingL
w = Part.makePolygon([p1, p2, p3, p4, p1])
face = Part.Face(w)
totalFace = face
# Initial perf, far
p1 = edge.valueAt(edge.LastParameter - gap2 - lenIPerf2) + dir.normalize() * pivotL
p2 = edge.valueAt(edge.LastParameter - gap2) + dir.normalize() * pivotL
p3 = edge.valueAt(edge.LastParameter - gap2) + dir.normalize() * swingL
p4 = edge.valueAt(edge.LastParameter - gap2 - lenIPerf2) + dir.normalize() * swingL
w = Part.makePolygon([p1, p2, p3, p4, p1])
face = Part.Face(w)
totalFace = totalFace.fuse(face)
# Perforations, inner
for i in range(P):
x = (edge.FirstParameter + gap1 + lenIPerf1) + (Ln * F * (i+1)) + (Lp * F * i)
p1 = edge.valueAt(x) + dir.normalize() * pivotL
p2 = edge.valueAt(x + Lp*F) + dir.normalize() * pivotL
p3 = edge.valueAt(x + Lp*F) + dir.normalize() * swingL
p4 = edge.valueAt(x) + dir.normalize() * swingL
w = Part.makePolygon([p1, p2, p3, p4, p1])
face = Part.Face(w)
totalFace = totalFace.fuse(face)
if hasattr(totalFace, "mapShapes"):
totalFace.mapShapes([(edge, totalFace)], None, op)
return totalFace
def smMakeFace(edge, dir, extLen, gap1=0.0,
gap2=0.0, angle1=0.0, angle2=0.0, op=""):
len1 = extLen * math.tan(math.radians(angle1))
len2 = extLen * math.tan(math.radians(angle2))
p1 = edge.valueAt(edge.LastParameter - gap2)
p2 = edge.valueAt(edge.FirstParameter + gap1)
p3 = edge.valueAt(edge.FirstParameter + gap1 + len1) + dir.normalize() * extLen
p4 = edge.valueAt(edge.LastParameter - gap2 - len2) + dir.normalize() * extLen
e2 = Part.makeLine(p2, p3)
e4 = Part.makeLine(p4, p1)
section = e4.section(e2)
if section.Vertexes:
p5 = section.Vertexes[0].Point
w = Part.makePolygon([p1, p2, p5, p1])
else:
w = Part.makePolygon([p1, p2, p3, p4, p1])
face = Part.Face(w)
if hasattr(face, "mapShapes"):
face.mapShapes([(edge, face)], None, op)
return face
def smRestrict(var, fromVal, toVal):
if var < fromVal:
return fromVal
if var > toVal:
return toVal
return var
def smModifiedFace(Face, obj):
# find face Modified During loop
for face in obj.Faces:
face_common = face.common(Face)
if face_common.Faces:
if face.Area == face_common.Faces[0].Area:
break
return face
def LineAngle(edge1, edge2):
# find angle between two lines
v1a = edge1.Vertexes[0].Point
v1b = edge1.Vertexes[1].Point
v2a = edge2.Vertexes[0].Point
v2b = edge2.Vertexes[1].Point
# Find the right order of the wire verts to calculate the angle
# the order of the verts v1a v1b v2a v2b should be such that v1b is the closest vert to v2a
minlen = (v1a - v2a).Length
order = [v1b, v1a, v2a, v2b]
len = (v1a - v2b).Length
if (len < minlen):
minlen = len
order = [v1b, v1a, v2b, v2a]
len = (v1b - v2a).Length
if (len < minlen):
minlen = len
order = [v1a, v1b, v2a, v2b]
len = (v1b - v2b).Length
if (len < minlen):
order = [v1a, v1b, v2b, v2a]
lineDir = order[1] - order[0]
edgeDir = order[3] - order[2]
angleRad = edgeDir.getAngle(lineDir)
angle = math.degrees(angleRad)
#if (angle > 90):
# angle = 180.0 - angle
return angle
def smGetFace(Faces, obj):
# find face Name Modified obj
faceList = []
for Face in Faces:
for i, face in enumerate(obj.Faces):
face_common = face.common(Face)
if face_common.Faces:
faceList.append("Face" + str(i + 1))
# print(faceList)
return faceList
def LineExtend(edge, distance1, distance2):
# Extend a line by given distances
result = edge.Curve.toShape(
edge.FirstParameter - distance1, edge.LastParameter + distance2
)
if hasattr(result, "mapShapes"):
result.mapShapes([(edge, result)], [])
return result
def getParallel(edge1, edge2):
# Get intersection between two lines
e1 = edge1.Curve.toShape()
# Part.show(e1,'e1')
e2 = edge2.Curve.toShape()
# Part.show(e2,'e2')
section = e1.section(e2)
if section.Vertexes:
# Part.show(section,'section')
return False
else:
return True
def getCornerPoint(edge1, edge2):
# Get intersection between two lines
# Part.show(edge1,'edge1')
# Part.show(edge2,'edge21')
e1 = edge1.Curve.toShape()
# Part.show(e1,'e1')
e2 = edge2.Curve.toShape()
# Part.show(e2,'e2')
section = e1.section(e2)
cornerPoint = None
if section.Vertexes:
# Part.show(section,'section')
cornerPoint = section.Vertexes[0].Point
return cornerPoint
def getGap(line1, line2, maxExtendGap, mingap):
# To find gap between two edges
gaps = 0.0
extgap = 0.0
section = line1.section(line2)
if section.Vertexes:
cornerPoint = section.Vertexes[0].Point
size1 = abs((cornerPoint - line2.Vertexes[0].Point).Length)
size2 = abs((cornerPoint - line2.Vertexes[1].Point).Length)
if size1 < size2:
gaps = size1
else:
gaps = size2
gaps = gaps + mingap
# print(gaps)
else:
cornerPoint = getCornerPoint(line1, line2)
line3 = LineExtend(line1, maxExtendGap, maxExtendGap)
# Part.show(line1,'line1')
line4 = LineExtend(line2, maxExtendGap, maxExtendGap)
# Part.show(line2,'line2')
section = line3.section(line4)
if section.Vertexes:
# cornerPoint = section.Vertexes[0].Point
# p1 = Part.Vertex(cornerPoint)
section1 = line1.section(line4)
size1 = abs((cornerPoint - line2.Vertexes[0].Point).Length)
size2 = abs((cornerPoint - line2.Vertexes[1].Point).Length)
# dist = cornerPoint.distanceToLine(line2.Curve.Location, line2.Curve.Direction)
# print(["gap",size1, size2, dist])
# if section1.Vertexes :
# extgap = 0.0
if size1 < size2:
extgap = size1
else:
extgap = size2
# if dist < smEpsilon :
# gaps = extgap
# extgap = 0.0
if extgap > mingap:
extgap = extgap - mingap
# print(extgap)
return gaps, extgap, cornerPoint
def getSketchDetails(Sketch, sketchflip, sketchinvert, radius, thk):
# Convert Sketch lines to length. Angles between line
LengthList, bendAList = ([], [])
sketch_normal = Sketch.Placement.Rotation.multVec(FreeCAD.Vector(0, 0, 1))
e0 = Sketch.Placement.Rotation.multVec(FreeCAD.Vector(1, 0, 0))
WireList = Sketch.Shape.Wires[0]
# Create filleted wire at centre of thickness
wire_extr = WireList.extrude(sketch_normal * -50)
# Part.show(wire_extr,"wire_extr")
wire_extr_mir = WireList.extrude(sketch_normal * 50)
# Part.show(wire_extr_mir,"wire_extr_mir")
wire_extr = wire_extr.makeOffsetShape(thk / 2.0, 0.0, fill=False, join=2)
# Part.show(wire_extr,"wire_extr")
wire_extr_mir = wire_extr_mir.makeOffsetShape(-thk / 2.0, 0.0, fill=False, join=2)
# Part.show(wire_extr_mir,"wire_extr_mir")
if len(WireList.Edges) > 1:
filleted_extr = wire_extr.makeFillet((radius + thk / 2.0), wire_extr.Edges)
# Part.show(filleted_extr,"filleted_extr")
filleted_extr_mir = wire_extr_mir.makeFillet(
(radius + thk / 2.0), wire_extr_mir.Edges
)
# Part.show(filleted_extr_mir,"filleted_extr_mir")
else:
filleted_extr = wire_extr
filleted_extr_mir = wire_extr_mir
# Part.show(filleted_extr,"filleted_extr")
sec_wirelist = filleted_extr_mir.section(filleted_extr)
# Part.show(sec_wirelist,"sec_wirelist")
for edge in sec_wirelist.Edges:
if isinstance(edge.Curve, Part.Line):
LengthList.append(edge.Length)
for i in range(len(WireList.Vertexes) - 1):
p1 = WireList.Vertexes[i].Point
p2 = WireList.Vertexes[i + 1].Point
e1 = p2 - p1
# LengthList.append(e1.Length)
normal = e0.cross(e1)
coeff = sketch_normal.dot(normal)
if coeff >= 0:
sign = 1
else:
sign = -1
angle_rad = e0.getAngle(e1)
if sketchflip:
angle = sign * math.degrees(angle_rad) * -1
else:
angle = sign * math.degrees(angle_rad)
bendAList.append(angle)
e0 = e1
if sketchinvert:
LengthList.reverse()
bendAList.reverse()
# print(LengthList, bendAList)
return LengthList, bendAList
def check_parallel(edge1, edge2):
v1 = edge1.Vertexes[0].Point - edge1.Vertexes[1].Point
v2 = edge2.Vertexes[0].Point - edge2.Vertexes[1].Point
if v1.isEqual(v2,0.00001):
return True, edge2.Vertexes[0].Point - edge1.Vertexes[0].Point
if v1.isEqual(-v2,0.00001):
return True, edge2.Vertexes[0].Point - edge1.Vertexes[1].Point
return False, None
def sheet_thk(MainObject, selFaceName):
selItem = MainObject.getElement(SheetMetalTools.getElementFromTNP(selFaceName))
selFace = SheetMetalTools.smGetFaceByEdge(selItem, MainObject)
# find the narrow edge
thk = 999999.0
thkDir = None
if type(selItem) == Part.Face:
for edge in selFace.Edges:
if abs(edge.Length) < thk:
thk = abs(edge.Length)
else:
# if selected item is edge, try to find closest parallel edge - works better
# when object is refined and faces are not rectangle
for edge in selFace.Edges:
if edge.isSame(selItem):
continue
isParallel, distVect = check_parallel(selItem, edge)
if isParallel:
dist = distVect.Length
if dist < thk:
thk = dist
thkDir = distVect
thkDir.normalize()
return thk, thkDir
def smEdge(selFaceName, MainObject):
# find Edge, if Face Selected
selItem = MainObject.getElement(SheetMetalTools.getElementFromTNP(selFaceName))
thkDir = None
if type(selItem) == Part.Face:
# find the narrow edge
thk = 999999.0
for edge in selItem.Edges:
if abs(edge.Length) < thk:
thk = abs(edge.Length)
thkEdge = edge
# find a length edge = revolve axis direction
p0 = thkEdge.valueAt(thkEdge.FirstParameter)
for lenEdge in selItem.Edges:
p1 = lenEdge.valueAt(lenEdge.FirstParameter)
p2 = lenEdge.valueAt(lenEdge.LastParameter)
if lenEdge.isSame(thkEdge):
continue
if (p1 - p0).Length < smEpsilon:
revAxisV = p2 - p1
break
if (p2 - p0).Length < smEpsilon:
revAxisV = p1 - p2
break
seledge = lenEdge
selFace = selItem
elif type(selItem) == Part.Edge:
thk, thkDir = sheet_thk(MainObject, selFaceName)
seledge = selItem
selFace = SheetMetalTools.smGetFaceByEdge(selItem, MainObject)
p1 = seledge.valueAt(seledge.FirstParameter)
p2 = seledge.valueAt(seledge.LastParameter)
revAxisV = p2 - p1
#print(str(revAxisV))
return seledge, selFace, thk, revAxisV, thkDir
def getBendetail(selItemNames, MainObject, bendR, bendA, isflipped, offset, gap1, gap2):
mainlist = []
edgelist = []
nogap_edgelist = []
for selItemName in selItemNames:
lenEdge, selFace, thk, revAxisV, thkDir = smEdge(selItemName, MainObject)
# find the large face connected with selected face
list2 = MainObject.ancestorsOfType(lenEdge, Part.Face)
for Cface in list2:
if not (Cface.isSame(selFace)):
break
# main Length Edge
revAxisV.normalize()
if thkDir is None:
pThkDir1 = selFace.CenterOfMass
pThkDir2 = lenEdge.Curve.value(lenEdge.Curve.parameter(pThkDir1))
thkDir = pThkDir1.sub(pThkDir2).normalize()
#print(str(thkDir))
FaceDir = selFace.normalAt(0, 0)
# make sure the direction vector is correct in respect to the normal
if (thkDir.cross(revAxisV).normalize() - FaceDir).Length < smEpsilon:
revAxisV = revAxisV * -1
flipped = isflipped
# restrict angle
if bendA < 0:
bendA = -bendA
flipped = not flipped
if type(MainObject.getElement(SheetMetalTools.getElementFromTNP(selItemName))) == Part.Edge:
flipped = not flipped
if not (flipped):
revAxisP = lenEdge.valueAt(lenEdge.FirstParameter) + thkDir * (bendR + thk)
revAxisV = revAxisV * -1
else:
revAxisP = lenEdge.valueAt(lenEdge.FirstParameter) + thkDir * -bendR
# Part.show(lenEdge,'lenEdge')
mainlist.append(
[
Cface,
selFace,
thk,
lenEdge,
revAxisP,
revAxisV,
thkDir,
FaceDir,
bendA,
flipped,
]
)
if offset < 0.0:
dist = lenEdge.valueAt(lenEdge.FirstParameter).distanceToPlane(
FreeCAD.Vector(0, 0, 0), FaceDir
)
# print(dist)
slice_wire = Cface.slice(FaceDir, dist + offset)
# print(slice_wire)
trimLenEdge = slice_wire[0].Edges[0]
else:
# Produce Offset Edge
trimLenEdge = lenEdge.copy()
trimLenEdge.translate(selFace.normalAt(0, 0) * offset)
# Part.show(trimLenEdge,'trimLenEdge1')
nogap_edgelist.append(trimLenEdge)
trimLenEdge = LineExtend(trimLenEdge, -gap1, -gap2)
# Part.show(trimLenEdge,'trimLenEdge2')
edgelist.append(trimLenEdge)
# print(mainlist)
trimedgelist = InsideEdge(edgelist)
nogaptrimedgelist = InsideEdge(nogap_edgelist)
return mainlist, trimedgelist, nogaptrimedgelist
def InsideEdge(edgelist):
import BOPTools.JoinFeatures
newedgelist = []
for i, e in enumerate(edgelist):
for j, ed in enumerate(edgelist):
if i != j:
section = e.section(ed)
if section.Vertexes:
edgeShape = BOPTools.JoinAPI.cutout_legacy(e, ed, tolerance=0.0)
e = edgeShape
# Part.show(e,"newedge")
newedgelist.append(e)
return newedgelist
def smMiter(
mainlist,
trimedgelist,
bendR=1.0,
miterA1=0.0,
miterA2=0.0,
extLen=10.0,
gap1=0.0,
gap2=0.0,
offset=0.0,
reliefD=1.0,
automiter=True,
extend1=0.0,
extend2=0.0,
mingap=0.1,
maxExtendGap=5.0,
):
if not (automiter):
miterA1List = [miterA1 for n in mainlist]
miterA2List = [miterA2 for n in mainlist]
gap1List = [gap1 for n in mainlist]
gap2List = [gap2 for n in mainlist]
extgap1List = [extend1 for n in mainlist]
extgap2List = [extend2 for n in mainlist]
else:
miterA1List = [0.0 for n in mainlist]
miterA2List = [0.0 for n in mainlist]
gap1List = [gap1 for n in mainlist]
gap2List = [gap2 for n in mainlist]
extgap1List = [extend1 for n in mainlist]
extgap2List = [extend2 for n in mainlist]
facelist, tranfacelist = ([], [])
extfacelist, exttranfacelist = ([], [])
lenedgelist, tranedgelist = ([], [])
for i, sublist in enumerate(mainlist):
# find the narrow edge
(
Cface,
selFace,
thk,
MlenEdge,
revAxisP,
revAxisV,
thkDir,
FaceDir,
bendA,
flipped,
) = sublist
# Produce Offset Edge
lenEdge = trimedgelist[i].copy()
#Part.show(lenEdge)
revAxisP = revAxisP + FaceDir * offset
# narrow the wall, if we have gaps
BendFace = smMakeFace(
lenEdge, FaceDir, extLen, gap1 - extend1, gap2 - extend2, op="SMB"
)
if BendFace.normalAt(0, 0) != thkDir:
BendFace.reverse()
#Part.show(BendFace)
transBendFace = BendFace.copy()
BendFace.rotate(revAxisP, revAxisV, bendA)
#Part.show(BendFace,'BendFace')
facelist.append(BendFace)
transBendFace.translate(thkDir * thk)
transBendFace.rotate(revAxisP, revAxisV, bendA)
tranfacelist.append(transBendFace)
#Part.show(transBendFace,'transBendFace')
# narrow the wall, if we have gaps
BendFace = smMakeFace(
lenEdge,
FaceDir,
extLen,