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Draft: Added DraftGeomUtils.pocket2d(shape,float)

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Returns a list of wires obtained by offsetting the wires of the given
shape by the given amount (outer wire inside, inner wires outside) and
resolving intersections
This commit is contained in:
Yorik van Havre
2014-10-03 17:35:40 -03:00
parent 05de6c103f
commit 537e759142
1 changed files with 75 additions and 4 deletions
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79
src/Mod/Draft/DraftGeomUtils.py
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@@ -222,10 +222,11 @@ def findEdge(anEdge,aList):
return None
def findIntersection(edge1,edge2,infinite1=False,infinite2=False,ex1=False,ex2=False) :
'''findIntersection(edge1,edge2,infinite1=False,infinite2=False):
def findIntersection(edge1,edge2,infinite1=False,infinite2=False,ex1=False,ex2=False,dts=True) :
'''findIntersection(edge1,edge2,infinite1=False,infinite2=False,dts=True):
returns a list containing the intersection point(s) of 2 edges.
You can also feed 4 points instead of edge1 and edge2'''
You can also feed 4 points instead of edge1 and edge2. If dts is used,
Shape.distToShape() is used, which can be buggy'''
def getLineIntersections(pt1,pt2,pt3,pt4,infinite1,infinite2):
if pt1:
@@ -276,7 +277,7 @@ def findIntersection(edge1,edge2,infinite1=False,infinite2=False,ex1=False,ex2=F
return [] # Lines aren't on same plane
# First, try to use distToShape if possible
if isinstance(edge1,Part.Edge) and isinstance(edge2,Part.Edge) and (not infinite1) and (not infinite2):
if dts and isinstance(edge1,Part.Edge) and isinstance(edge2,Part.Edge) and (not infinite1) and (not infinite2):
dist, pts, geom = edge1.distToShape(edge2)
sol = []
for p in pts:
@@ -437,6 +438,76 @@ def findIntersection(edge1,edge2,infinite1=False,infinite2=False,ex1=False,ex2=F
return int
else :
print "DraftGeomUtils: Unsupported curve type: (" + str(edge1.Curve) + ", " + str(edge2.Curve) + ")"
def wiresIntersect(wire1,wire2):
"wiresIntersect(wire1,wire2): returns True if some of the edges of the wires are intersecting otherwise False"
for e1 in wire1.Edges:
for e2 in wire2.Edges:
if findIntersection(e1,e2,dts=False):
return True
return False
def pocket2d(shape,offset):
"""pocket2d(shape,offset): return a list of wires obtained from offsetting the wires from the given shape
by the given offset, and intersection if needed."""
# find the outer wire
l = 0
outerWire = None
innerWires = []
for w in shape.Wires:
if w.BoundBox.DiagonalLength > l:
outerWire = w
l = w.BoundBox.DiagonalLength
if not outerWire:
return []
for w in shape.Wires:
if w.hashCode() != outerWire.hashCode():
innerWires.append(w)
o = outerWire.makeOffset(-offset)
if not o.Wires:
return []
offsetWires = o.Wires
print "base offset wires:",offsetWires
if not innerWires:
return offsetWires
for innerWire in innerWires:
i = innerWire.makeOffset(offset)
if i.Wires:
print "offsetting island ",innerWire," : ",i.Wires
for w in i.Wires:
added = False
print "checking wire ",w
k = range(len(offsetWires))
for j in k:
print "checking against existing wire ",j
ow = offsetWires[j]
if ow:
if wiresIntersect(w,ow):
print "intersect"
f1 = Part.Face(ow)
f2 = Part.Face(w)
f3 = f1.cut(f2)
print "made new wires: ",f3.Wires
offsetWires[j] = f3.Wires[0]
if len(f3.Wires) > 1:
print "adding more"
offsetWires.extend(f3.Wires[1:])
added = True
else:
a = w.BoundBox
b = ow.BoundBox
if (a.XMin <= b.XMin) and (a.YMin <= b.YMin) and (a.ZMin <= b.ZMin) and (a.XMax >= b.XMax) and (a.YMax >= b.YMax) and (a.ZMax >= b.ZMax):
print "this wire is bigger than the outer wire"
offsetWires[j] = None
added = True
else:
print "doesn't intersect"
if not added:
print "doesn't intersect with any other"
offsetWires.append(w)
offsetWires = [o for o in offsetWires if o != None]
return offsetWires
def geom(edge,plac=FreeCAD.Placement()):
"returns a Line, ArcOfCircle or Circle geom from the given edge, according to the given placement"