def makeHeartWire(): "make a heart wire" e1 = Wrappers.edgeFromTwoPoints(gp.gp_Pnt(0,0,0), gp.gp_Pnt(4.0,4.0,0)); circle = gp.gp_Circ(gp.gp_Ax2(gp.gp_Pnt(2,4,0),gp.gp().DZ()),2); e2 = BRepBuilderAPI.BRepBuilderAPI_MakeEdge(circle, gp.gp_Pnt(4,4,0),gp.gp_Pnt(0,4,0)).Edge(); circle = gp.gp_Circ(gp.gp_Ax2(gp.gp_Pnt(-2,4,0),gp.gp().DZ()),2); e3 = BRepBuilderAPI.BRepBuilderAPI_MakeEdge(circle, gp.gp_Pnt(0,4,0),gp.gp_Pnt(-4,4,0)).Edge(); e4 = Wrappers.edgeFromTwoPoints(gp.gp_Pnt(-4,4,0), gp.gp_Pnt(0,0,0)); return Wrappers.wireFromEdges([e1,e2,e3,e4]);
def makeHeartWire2d():
"make a heart wire in 2d"
e1 = edgeFromTwoPoints((0, 0), (4.0, 4.0))
circle = gp.gp_Circ2d(gp.gp_Ax2d(tP(2, 4), gp.gp().DX2d()), 2)
e2 = BRepBuilderAPI.BRepBuilderAPI_MakeEdge2d(circle, tP(4, 4), tP(0, 4)).Edge()
circle = gp.gp_Circ2d(gp.gp_Ax2d(tP(-2, 4), gp.gp().DX2d()), 2)
e3 = BRepBuilderAPI.BRepBuilderAPI_MakeEdge2d(circle, tP(0, 4), tP(-4, 4)).Edge()
e4 = edgeFromTwoPoints((-4, 4), (0, 0))
return Wrappers.wireFromEdges([e1, e2, e3, e4])
def makeHeartWire():
"make a heart wire"
e1 = Wrappers.edgeFromTwoPoints(gp.gp_Pnt(0, 0, 0), gp.gp_Pnt(4.0, 4.0, 0))
circle = gp.gp_Circ(gp.gp_Ax2(gp.gp_Pnt(2, 4, 0),
gp.gp().DZ()), 2)
e2 = BRepBuilderAPI.BRepBuilderAPI_MakeEdge(circle, gp.gp_Pnt(4, 4, 0),
gp.gp_Pnt(0, 4, 0)).Edge()
circle = gp.gp_Circ(gp.gp_Ax2(gp.gp_Pnt(-2, 4, 0),
gp.gp().DZ()), 2)
e3 = BRepBuilderAPI.BRepBuilderAPI_MakeEdge(circle, gp.gp_Pnt(0, 4, 0),
gp.gp_Pnt(-4, 4, 0)).Edge()
e4 = Wrappers.edgeFromTwoPoints(gp.gp_Pnt(-4, 4, 0), gp.gp_Pnt(0, 0, 0))
return Wrappers.wireFromEdges([e1, e2, e3, e4])
def makeHeartWire2d():
"make a heart wire in 2d"
e1 = edgeFromTwoPoints((0, 0), (4.0, 4.0))
circle = gp.gp_Circ2d(gp.gp_Ax2d(tP(2, 4),
gp.gp().DX2d()), 2)
e2 = BRepBuilderAPI.BRepBuilderAPI_MakeEdge2d(circle, tP(4, 4),
tP(0, 4)).Edge()
circle = gp.gp_Circ2d(gp.gp_Ax2d(tP(-2, 4),
gp.gp().DX2d()), 2)
e3 = BRepBuilderAPI.BRepBuilderAPI_MakeEdge2d(circle, tP(0, 4),
tP(-4, 4)).Edge()
e4 = edgeFromTwoPoints((-4, 4), (0, 0))
return Wrappers.wireFromEdges([e1, e2, e3, e4])
def intersectWiresUsingDistShapeShape(wire, edges):
"intersect a wire with a series of edges. naive algorithm without bounding box sorting "
ipoints = []
w = Wrappers.Wire(wire)
circle = gp.gp_Circ2d(gp.gp_Ax2d(tP(2, 4),
gp.gp().DX2d()), 2)
e2 = BRepBuilderAPI.BRepBuilderAPI_MakeEdge2d(circle, tP(4, 4),
tP(0, 4)).Edge()
TestDisplay.display.showShape(e2)
e4 = edgeFromTwoPoints((-4, 4), (0, 0))
TestDisplay.display.showShape(e4)
brp = BRepExtrema.BRepExtrema_DistShapeShape(e2, e4)
print "runing"
brp.Perform()
print "done"
if brp.Value() < 0.001:
print "intersection found!"
#TODO need to handle the somewhat unusual cases that the intersection is
#on a vertex
for k in range(1, brp.NbSolution() + 1):
p1 = brp.PointOnShape1(k)
ipoints.append(p1.X(), p1.Y())
return (count, ipoints)
def normalEdgesAlongEdge(edge, length , interval): "compute an edge having length at the specified parameter on the supplied curve:" edgeList = []; ew = Wrappers.Edge(edge); zDir = gp.gp().DZ(); zVec = gp.gp_Vec(zDir); curve = ew.curve; pStart = ew.firstParameter; pEnd = ew.lastParameter; for p in Wrappers.frange6(pStart,pEnd,interval): tangent = gp.gp_Vec(); tanpoint = gp.gp_Pnt(); curve.D1(p,tanpoint,tangent ); axis = gp.gp_Ax1(tanpoint, gp.gp_Dir(tangent.Crossed(zVec) ) ); line = Geom.Geom_Line(axis ); e = BRepBuilderAPI.BRepBuilderAPI_MakeEdge(line.GetHandle(),0, length).Edge(); if e: edgeList.append(e); return edgeList;
def makeCircleWire():
"designed to be include inside the square to simulate an island"
circle = gp.gp_Circ(gp.gp_Ax2(gp.gp_Pnt(2,2,0),gp.gp().DZ()),1);
e1 = BRepBuilderAPI.BRepBuilderAPI_MakeEdge(circle).Edge();
mw = BRepBuilderAPI.BRepBuilderAPI_MakeWire();
mw.Add(e1);
return mw.Wire();
def _makeSlice(self, shapeToSlice, zLevel):
s = Slice()
#used to determine if a slice is identical to others.
s.hatchDir = self.hatchReversed
s.fillWidth = self.options.filling.fillWidth
#change if layers are variable thickness
s.sliceHeight = self.options.layerHeight
s.zLevel = zLevel
#make a cutting plane
p = gp.gp_Pnt(0, 0, zLevel)
origin = gp.gp_Pnt(0, 0, zLevel - 1)
csys = gp.gp_Ax3(p, gp.gp().DZ())
cuttingPlane = gp.gp_Pln(csys)
bff = BRepBuilderAPI.BRepBuilderAPI_MakeFace(cuttingPlane)
face = bff.Face()
#odd, a halfspace is faster than a box?
hs = BRepPrimAPI.BRepPrimAPI_MakeHalfSpace(face, origin)
hs.Build()
halfspace = hs.Solid()
#make the cut
bc = BRepAlgoAPI.BRepAlgoAPI_Cut(shapeToSlice, halfspace)
cutShape = bc.Shape()
foundFace = False
for face in Topo(cutShape).faces():
if self._isAtZLevel(zLevel, face):
foundFace = True
log.debug("Face is at zlevel" + str(zLevel))
s.addFace(face)
#TestDisplay.display.showShape(face);
log.debug("Face" + str(face))
if self.options.useSliceFactoring:
mySum = s.getCheckSum()
#print 'Slice Created, Checksum is',mySum;
for otherSlice in self.slices:
#print "Slice Checksum=",otherSlice.getCheckSum();
if mySum == otherSlice.getCheckSum():
log.info(
"This slice matches another one exactly. using that so we can save time."
)
return otherSlice.copyToZ(zLevel)
if not foundFace:
log.warn("No faces found after slicing at zLevel " + str(zLevel) +
" !. Skipping This layer completely")
return None
else:
return s
def makeCircleWire():
"designed to be include inside the square to simulate an island"
circle = gp.gp_Circ(gp.gp_Ax2(gp.gp_Pnt(2, 2, 0),
gp.gp().DZ()), 1)
e1 = BRepBuilderAPI.BRepBuilderAPI_MakeEdge(circle).Edge()
mw = BRepBuilderAPI.BRepBuilderAPI_MakeWire()
mw.Add(e1)
return mw.Wire()
def get2dCurveFrom3dEdge(edge):
"""
returns a curve given an edge.
here, we want to get a curve from a 3dEdge, since with this approach we'll only be getting existing
curves from a 3d source
"""
# first, convert the curve to a 2d curve
btool = BRep.BRep_Tool()
handleCurve = btool.Curve(edge)[0]
return GeomAPI.GeomAPI().To2d(handleCurve, gp.gp_Pln(gp.gp_Pnt(0, 0, 0), gp.gp().DZ()))
def _makeSlice(self,shapeToSlice,zLevel):
s = Slice();
#used to determine if a slice is identical to others.
s.hatchDir = self.hatchReversed;
s.fillWidth = self.options.filling.fillWidth;
#change if layers are variable thickness
s.sliceHeight = self.options.layerHeight;
s.zLevel = zLevel;
#make a cutting plane
p = gp.gp_Pnt ( 0,0,zLevel );
origin = gp.gp_Pnt(0,0,zLevel-1);
csys = gp.gp_Ax3(p,gp.gp().DZ())
cuttingPlane = gp.gp_Pln(csys);
bff = BRepBuilderAPI.BRepBuilderAPI_MakeFace(cuttingPlane);
face = bff.Face();
#odd, a halfspace is faster than a box?
hs = BRepPrimAPI.BRepPrimAPI_MakeHalfSpace(face,origin);
hs.Build();
halfspace = hs.Solid();
#make the cut
bc = BRepAlgoAPI.BRepAlgoAPI_Cut(shapeToSlice,halfspace);
cutShape = bc.Shape();
foundFace = False;
for face in Topo(cutShape).faces():
if self._isAtZLevel(zLevel,face):
foundFace = True;
log.debug( "Face is at zlevel" + str(zLevel) );
s.addFace(face);
TestDisplay.display.showShape(face);
log.debug("Face" + str(face) );
if self.options.useSliceFactoring:
mySum = s.getCheckSum();
#print 'Slice Created, Checksum is',mySum;
for otherSlice in self.slices:
#print "Slice Checksum=",otherSlice.getCheckSum();
if mySum == otherSlice.getCheckSum():
log.info("This slice matches another one exactly. using that so we can save time.");
return otherSlice.copyToZ(zLevel);
if not foundFace:
log.warn("No faces found after slicing at zLevel " + str(zLevel) + " !. Skipping This layer completely");
return None;
else:
return s;
def followEdge(self,edgeWrapper,feed):
#print str(edgeWrapper);
if self.verbose:
generator.comment("Follow: " + str(edgeWrapper));
#check to see if we should reverse this edge. Perhaps reversing it will work better.
if not self.isPointClose(edgeWrapper.firstPoint,0.005):
#print "moving to start."
generator.moveTo(edgeWrapper.firstPoint,feed,"G00");
if edgeWrapper.isLine():
generator.lineTo(edgeWrapper.lastPoint,feed);
elif edgeWrapper.isCircle() and useArcs:
circle = edgeWrapper.curve.Circle();
center = circle.Location();
axisDir = circle.Axis().Direction(); #need this to determine which way the arc goes
#assume we are essentially in 2d space, so we're looking only at wehter the
#axis of the circle is +z or -z
zDir = gp.gp().DZ();
if edgeWrapper.reversed:
zDir = zDir.Reversed();
#TODO: handle incremental coordinates
generator.arc(center.X()-edgeWrapper.firstPoint.X(),center.Y()-edgeWrapper.firstPoint.Y(),
edgeWrapper.lastPoint.X(),edgeWrapper.lastPoint.Y(),
edgeWrapper.lastPoint.Z(),zDir.IsEqual(axisDir,TOLERANCE));
self.lastMove = None;
else:
edge = edgeWrapper.edge;
range = Brep_Tool.Range(edge);
log.debug( "Edge Bounds:" + str(range) );
hc= Brep_Tool.Curve(edge);
ad = GeomAdaptor.GeomAdaptor_Curve(hc[0]);
log.debug( "Edge is a curve of type:" + str(ad.GetType()));
p1 = hc[1];
p2 = hc[2];
gc = GCPnts.GCPnts_QuasiUniformDeflection(ad,0.001,p1,p2);
i=1;
numPts = gc.NbPoints();
log.debug( "Discretized Curve has" + str(numPts) + " points." );
while i<=numPts:
if edge.Orientation() == TopAbs.TopAbs_FORWARD:
tPt = gc.Value(i);
else:
tPt = gc.Value(numPts-i+1);
i+=1;
generator.movePt(tPt,feed);
#last point is the end
generator.lineTo(edgeWrapper.lastPoint);
def _isAtZLevel(self, zLevel, face):
bf = BRepGProp.BRepGProp_Face(face)
bounds = bf.Bounds()
vec = gp.gp_Vec()
zDir = gp.gp().DZ()
pt = gp.gp_Pnt()
#get a normal vector to the face
bf.Normal(bounds[0], bounds[1], pt, vec)
z = pt.Z()
sDir = gp.gp_Dir(vec)
return (abs(z - zLevel) < 0.0001) and (zDir.IsParallel(sDir, 0.0001))
def _isAtZLevel(self, zLevel, face):
bf = BRepGProp.BRepGProp_Face(face)
bounds = bf.Bounds()
vec = gp.gp_Vec()
zDir = gp.gp().DZ()
pt = gp.gp_Pnt()
# get a normal vector to the face
bf.Normal(bounds[0], bounds[1], pt, vec)
z = pt.Z()
sDir = gp.gp_Dir(vec)
return (abs(z - zLevel) < 0.0001) and (zDir.IsParallel(sDir, 0.0001))
def get2dCurveFrom3dEdge(edge):
"""
returns a curve given an edge.
here, we want to get a curve from a 3dEdge, since with this approach we'll only be getting existing
curves from a 3d source
"""
#first, convert the curve to a 2d curve
btool = BRep.BRep_Tool()
handleCurve = btool.Curve(edge)[0]
return GeomAPI.GeomAPI().To2d(handleCurve,
gp.gp_Pln(gp.gp_Pnt(0, 0, 0),
gp.gp().DZ()))
def isFaceAtZLevel(zLevel,face):
bf = BRepGProp.BRepGProp_Face(face);
bounds = bf.Bounds();
vec = gp.gp_Vec();
zDir = gp.gp().DZ();
pt = gp.gp_Pnt();
#get a normal vector to the face
bf.Normal(bounds[0],bounds[1],pt,vec);
z=pt.Z();
sDir = gp.gp_Dir(vec);
return (abs(z - zLevel) < 0.0001 ) and ( zDir.IsParallel(sDir,0.0001))
def _computeSlice(self, zLevel, layerNo, fillAngle):
cSlice = Slice()
cSlice.zLevel = zLevel
cSlice.layerNo = layerNo
cSlice.fillAngle = fillAngle
cSlice.thickness = self.options.layerHeight
#make a cutting plane
p = gp.gp_Pnt(0, 0, zLevel)
csys = gp.gp_Ax3(p, gp.gp().DZ())
cuttingPlane = gp.gp_Pln(csys)
#makeSection will use the old reliable way that will get a face from each cut.
#makeSection2 will use BRepAlgoaPI_Section, but has problems ordering the edges correctly.
newFaces = self.makeSection(cuttingPlane, self.solid.shape, zLevel)
for f in newFaces:
cSlice.addFace(Face(f))
#bff = BRepBuilderAPI.BRepBuilderAPI_MakeFace(cuttingPlane);
#face = bff.Face();
#odd, a halfspace is faster than a box?
#hs = BRepPrimAPI.BRepPrimAPI_MakeHalfSpace(face,origin);
#hs.Build();
#halfspace = hs.Solid();
#make the cut
#bc = BRepAlgoAPI.BRepAlgoAPI_Cut(self.solid.shape,halfspace);
#cutShape = bc.Shape();
#for face in Topo(cutShape).faces():
# if OCCUtil.isFaceAtZLevel(zLevel,face):
# cSlice.addFace(Face(face));
# break;
mySum = cSlice.computeFingerPrint()
#
#uncomment to enable layer copying.
#
#check for identical slices. return matching ones if found.
if self.sliceMap.has_key(mySum):
#print "i can copy this layer!"
return self.sliceMap[mySum].copyToZ(zLevel, layerNo)
self.sliceMap[mySum] = cSlice
#print "This slice has %d faces." % len(cSlice.faces)
if self.options.fillingEnabled:
self._fillSlice(cSlice)
return cSlice
def _computeSlice(self, zLevel, layerNo, fillAngle):
cSlice = Slice()
cSlice.zLevel = zLevel
cSlice.layerNo = layerNo
cSlice.fillAngle = fillAngle
cSlice.thickness = self.options.layerHeight
# make a cutting plane
p = gp.gp_Pnt(0, 0, zLevel)
csys = gp.gp_Ax3(p, gp.gp().DZ())
cuttingPlane = gp.gp_Pln(csys)
# makeSection will use the old reliable way that will get a face from each cut.
# makeSection2 will use BRepAlgoaPI_Section, but has problems ordering the edges correctly.
newFaces = self.makeSection(cuttingPlane, self.solid.shape, zLevel)
for f in newFaces:
cSlice.addFace(Face(f))
# bff = BRepBuilderAPI.BRepBuilderAPI_MakeFace(cuttingPlane);
# face = bff.Face();
# odd, a halfspace is faster than a box?
# hs = BRepPrimAPI.BRepPrimAPI_MakeHalfSpace(face,origin);
# hs.Build();
# halfspace = hs.Solid();
# make the cut
# bc = BRepAlgoAPI.BRepAlgoAPI_Cut(self.solid.shape,halfspace);
# cutShape = bc.Shape();
# for face in Topo(cutShape).faces():
# if OCCUtil.isFaceAtZLevel(zLevel,face):
# cSlice.addFace(Face(face));
# break;
mySum = cSlice.computeFingerPrint()
#
# uncomment to enable layer copying.
#
# check for identical slices. return matching ones if found.
if self.sliceMap.has_key(mySum):
# print "i can copy this layer!"
return self.sliceMap[mySum].copyToZ(zLevel, layerNo)
self.sliceMap[mySum] = cSlice
# print "This slice has %d faces." % len(cSlice.faces)
if self.options.fillingEnabled:
self._fillSlice(cSlice)
return cSlice
def makeSquareWithRoundHole():
points = [ (0,0),(0.05,-1.0),(1.0,0),(2.0,0),(2.0,6.0),(0.0,6.0) ];
ow = makeWireFromPointList(points);
circle = gp.gp_Circ(gp.gp_Ax2(gp.gp_Pnt(1.0,2,0),gp.gp().DZ()),0.75);
e1 = BRepBuilderAPI.BRepBuilderAPI_MakeEdge(circle).Edge();
mw = BRepBuilderAPI.BRepBuilderAPI_MakeWire();
mw.Add(e1);
circle = mw.Wire();
builder = BRepBuilderAPI.BRepBuilderAPI_MakeFace(ow,True);
builder.Add(circle);
return builder.Face();
def makeSquareWithRoundHole():
points = [(0, 0), (0.05, -1.0), (1.0, 0), (2.0, 0), (2.0, 6.0), (0.0, 6.0)]
ow = makeWireFromPointList(points)
circle = gp.gp_Circ(gp.gp_Ax2(gp.gp_Pnt(1.0, 2, 0),
gp.gp().DZ()), 0.75)
e1 = BRepBuilderAPI.BRepBuilderAPI_MakeEdge(circle).Edge()
mw = BRepBuilderAPI.BRepBuilderAPI_MakeWire()
mw.Add(e1)
circle = mw.Wire()
builder = BRepBuilderAPI.BRepBuilderAPI_MakeFace(ow, True)
builder.Add(circle)
return builder.Face()
def _makeSlice(self, shapeToSlice, zLevel):
s = Slice()
#change if layers are variable thickness
s.sliceHeight = self.sliceHeight
s.zLevel = zLevel
#make a cutting plane
p = gp.gp_Pnt(0, 0, zLevel)
origin = gp.gp_Pnt(0, 0, zLevel - 1)
csys = gp.gp_Ax3(p, gp.gp().DZ())
cuttingPlane = gp.gp_Pln(csys)
bff = BRepBuilderAPI.BRepBuilderAPI_MakeFace(cuttingPlane)
face = bff.Face()
#odd, a halfspace is faster than a box?
hs = BRepPrimAPI.BRepPrimAPI_MakeHalfSpace(face, origin)
hs.Build()
halfspace = hs.Solid()
#make the cut
bc = BRepAlgoAPI.BRepAlgoAPI_Cut(shapeToSlice, halfspace)
cutShape = bc.Shape()
#search the shape for faces at the specified zlevel
texp = TopExp.TopExp_Explorer()
texp.Init(cutShape, TopAbs.TopAbs_FACE)
foundFace = False
while (texp.More()):
face = ts.Face(texp.Current())
if self._isAtZLevel(zLevel, face):
foundFace = True
logging.debug("Face is at zlevel" + str(zLevel))
s.addFace(face, self.saveSliceFaces)
texp.Next()
#free memory
face.Nullify()
bc.Destroy()
texp.Clear()
texp.Destroy()
if not foundFace:
logging.warn("No faces found after slicing at zLevel " +
str(zLevel) + " !. Skipping This layer completely")
return None
else:
return s
def _makeSlice(self,shapeToSlice,zLevel):
s = Slice();
#change if layers are variable thickness
s.sliceHeight = self.sliceHeight;
s.zLevel = zLevel;
#make a cutting plane
p = gp.gp_Pnt ( 0,0,zLevel );
origin = gp.gp_Pnt(0,0,zLevel-1);
csys = gp.gp_Ax3(p,gp.gp().DZ())
cuttingPlane = gp.gp_Pln(csys);
bff = BRepBuilderAPI.BRepBuilderAPI_MakeFace(cuttingPlane);
face = bff.Face();
#odd, a halfspace is faster than a box?
hs = BRepPrimAPI.BRepPrimAPI_MakeHalfSpace(face,origin);
hs.Build();
halfspace = hs.Solid();
#make the cut
bc = BRepAlgoAPI.BRepAlgoAPI_Cut(shapeToSlice,halfspace);
cutShape = bc.Shape();
#search the shape for faces at the specified zlevel
texp = TopExp.TopExp_Explorer();
texp.Init(cutShape,TopAbs.TopAbs_FACE);
foundFace = False;
while ( texp.More() ):
face = ts.Face(texp.Current());
if self._isAtZLevel(zLevel,face):
foundFace = True;
logging.debug( "Face is at zlevel" + str(zLevel) );
s.addFace(face,self.saveSliceFaces);
texp.Next();
#free memory
face.Nullify();
bc.Destroy();
texp.Clear();
texp.Destroy();
if not foundFace:
logging.warn("No faces found after slicing at zLevel " + str(zLevel) + " !. Skipping This layer completely");
return None;
else:
return s;
def normalEdgeAtParameter(edge, param, length ): "compute an edge having length at the specified parameter on the supplied curve:" ew = Wrappers.Edge(edge); zDir = gp.gp().DZ(); zVec = gp.gp_Vec(zDir); tangent = gp.gp_Vec(); tanpoint = gp.gp_Pnt(); curve = ew.curve; curve.D1(param,tanpoint,tangent ); axis = gp.gp_Ax1(tanpoint, gp.gp_Dir(tangent.Crossed(zVec) ) ); line = Geom.Geom_Line(axis ); return BRepBuilderAPI.BRepBuilderAPI_MakeEdge(line.GetHandle(),0, length).Edge();
def intersectWiresUsingDistShapeShape(wire, edges):
"intersect a wire with a series of edges. naive algorithm without bounding box sorting "
ipoints = []
w = Wrappers.Wire(wire)
circle = gp.gp_Circ2d(gp.gp_Ax2d(tP(2, 4), gp.gp().DX2d()), 2)
e2 = BRepBuilderAPI.BRepBuilderAPI_MakeEdge2d(circle, tP(4, 4), tP(0, 4)).Edge()
TestDisplay.display.showShape(e2)
e4 = edgeFromTwoPoints((-4, 4), (0, 0))
TestDisplay.display.showShape(e4)
brp = BRepExtrema.BRepExtrema_DistShapeShape(e2, e4)
print "runing"
brp.Perform()
print "done"
if brp.Value() < 0.001:
print "intersection found!"
# TODO need to handle the somewhat unusual cases that the intersection is
# on a vertex
for k in range(1, brp.NbSolution() + 1):
p1 = brp.PointOnShape1(k)
ipoints.append(p1.X(), p1.Y())
return (count, ipoints)
def followEdge(self,e,finish=False):
"""
return a sequence of points for an edge as a generator
NOTE: this algorithm leaves a potential linear move not returned,
so you have to check pendingLinearMove at the end and return it if not null
"""
ew = Wrappers.Edge(e);
log.debug("Follow Edge: " + str(ew));
#if no current point, move to the first edge.
if not self.currentPoint:
log.debug("No Current Point, Move to start.");
"no current point defined yet."
self.currentPoint = ew.firstPoint;
yield LinearMove(None,ew.firstPoint,False);
else:
"there is a current point. But if the start of the edge is not close, we have to move there"
if self.isClose(ew.firstPoint):
log.debug("No moved Required to get to edge start.");
else:
log.debug("Must Move to first point, running any previous move.");
t= self._fetchPendingMove();
p = None;
if t:
p = t.toPoint;
yield t;
log.debug("Moving to First Point of Edge");
self.currentPoint = ew.firstPoint;
yield LinearMove(p,ew.firstPoint,False);
if ew.isLine():
"the last move was a line, and this one is too."
"if this move is parallel to the last one, then we'll dump that one"
"and replace it with this one. otherwise, we'll execute it first"
thisMoveDir = gp.gp_Vec(ew.firstPoint,ew.lastPoint);
if self.pendingLinearMove:
if not self.pendingLinearMove.dir.IsParallel(thisMoveDir,self.tolerance):
"this move is parallel to the last one, so replace with this one"
log.info("Move is redundant, replacing with this one.");
yield self.pendingLinearMove;
log.debug("Saving Move as Pending.");
self.pendingLinearMove = LinearMove(ew.firstPoint,ew.lastPoint,True);
self.currentPoint = ew.lastPoint;
else:
t= self._fetchPendingMove();
if t:
log.debug("Flushing a pending linear move...");
yield t;
if ew.isCircle() and self.useArcs:
log.debug("Curve is a Circle");
circle = ew.curve.Circle();
center = circle.Location();
axisDir = circle.Axis().Direction();
#assume we are essentially in 2d space, so we're looking only at wehter the
#axis of the circle is +z or -z
zDir = gp.gp().DZ();
if ew.reversed:
zDir = zDir.Reversed();
ccw = zDir.IsEqual(axisDir,self.tolerance);
self.currentPoint = ew.lastPoint;
includedAngle = abs( ew.firstParameter - ew.lastParameter );
a = ArcMove(ew.firstPoint, ew.lastPoint, center, ccw ,includedAngle);
#circles are parameterized between zero and 2*pi.
yield a;
#yield ArcMove(ew.firstPoint, ew.lastPoint, center, ccw );
else:
log.debug("Curve is not a line or a circle");
"a curve, or a circle we'll approximate"
#the generated points might include the beginning of the curve,
#so test for that, but only for the first point
firstP = True;
lastPoint = None;
for p in ew.discretePoints(self.approximatedCurveDeflection):
#check the first generated point for a duplicate
if firstP and self.isClose(p):
firstP = False;
continue;
yield LinearMove(lastPoint,p,True);
lastPoint = p;
self.currentPoint = lastPoint;
#flush any last remaining move
if finish:
t= self._fetchPendingMove();
if t:
yield t;
def makeCircleWire():
circle = gp.gp_Circ(gp.gp_Ax2(gp.gp_Pnt(0, 2, 0),
gp.gp().DZ()), .75)
e2 = BRepBuilderAPI.BRepBuilderAPI_MakeEdge(circle, gp.gp_Pnt(0, 1.25, 0),
gp.gp_Pnt(0, 1.25, 0)).Edge()
return Wrappers.wireFromEdges([e2])
def makeCircleWire(): circle = gp.gp_Circ(gp.gp_Ax2(gp.gp_Pnt(0,2,0),gp.gp().DZ()),.75); e2 = BRepBuilderAPI.BRepBuilderAPI_MakeEdge(circle, gp.gp_Pnt(0,1.25,0),gp.gp_Pnt(0,1.25,0)).Edge(); return Wrappers.wireFromEdges([e2]);
def followEdge(self, e, finish=False):
"""
return a sequence of points for an edge as a generator
NOTE: this algorithm leaves a potential linear move not returned,
so you have to check pendingLinearMove at the end and return it if not null
"""
ew = Wrappers.Edge(e)
log.debug("Follow Edge: " + str(ew))
#if no current point, move to the first edge.
if not self.currentPoint:
log.debug("No Current Point, Move to start.")
"no current point defined yet."
self.currentPoint = ew.firstPoint
yield LinearMove(None, ew.firstPoint, False)
else:
"there is a current point. But if the start of the edge is not close, we have to move there"
if self.isClose(ew.firstPoint):
log.debug("No moved Required to get to edge start.")
else:
log.debug(
"Must Move to first point, running any previous move.")
t = self._fetchPendingMove()
p = None
if t:
p = t.toPoint
yield t
log.debug("Moving to First Point of Edge")
self.currentPoint = ew.firstPoint
yield LinearMove(p, ew.firstPoint, False)
if ew.isLine():
"the last move was a line, and this one is too."
"if this move is parallel to the last one, then we'll dump that one"
"and replace it with this one. otherwise, we'll execute it first"
thisMoveDir = gp.gp_Vec(ew.firstPoint, ew.lastPoint)
if self.pendingLinearMove:
if not self.pendingLinearMove.dir.IsParallel(
thisMoveDir, self.tolerance):
"this move is parallel to the last one, so replace with this one"
log.info("Move is redundant, replacing with this one.")
yield self.pendingLinearMove
log.debug("Saving Move as Pending.")
self.pendingLinearMove = LinearMove(ew.firstPoint, ew.lastPoint,
True)
self.currentPoint = ew.lastPoint
else:
t = self._fetchPendingMove()
if t:
log.debug("Flushing a pending linear move...")
yield t
if ew.isCircle() and self.useArcs:
log.debug("Curve is a Circle")
circle = ew.curve.Circle()
center = circle.Location()
axisDir = circle.Axis().Direction()
#assume we are essentially in 2d space, so we're looking only at wehter the
#axis of the circle is +z or -z
zDir = gp.gp().DZ()
if ew.reversed:
zDir = zDir.Reversed()
ccw = zDir.IsEqual(axisDir, self.tolerance)
self.currentPoint = ew.lastPoint
includedAngle = abs(ew.firstParameter - ew.lastParameter)
a = ArcMove(ew.firstPoint, ew.lastPoint, center, ccw,
includedAngle)
#circles are parameterized between zero and 2*pi.
yield a
#yield ArcMove(ew.firstPoint, ew.lastPoint, center, ccw );
else:
log.debug("Curve is not a line or a circle")
"a curve, or a circle we'll approximate"
#the generated points might include the beginning of the curve,
#so test for that, but only for the first point
firstP = True
lastPoint = None
for p in ew.discretePoints(self.approximatedCurveDeflection):
#check the first generated point for a duplicate
if firstP and self.isClose(p):
firstP = False
continue
yield LinearMove(lastPoint, p, True)
lastPoint = p
self.currentPoint = lastPoint
#flush any last remaining move
if finish:
t = self._fetchPendingMove()
if t:
yield t
for p in Wrappers.frange6(pStart,pEnd,interval): tangent = gp.gp_Vec(); tanpoint = gp.gp_Pnt(); curve.D1(p,tanpoint,tangent ); axis = gp.gp_Ax1(tanpoint, gp.gp_Dir(tangent.Crossed(zVec) ) ); line = Geom.Geom_Line(axis ); e = BRepBuilderAPI.BRepBuilderAPI_MakeEdge(line.GetHandle(),0, length).Edge(); if e: edgeList.append(e); return edgeList; if __name__=='__main__': circle = gp.gp_Circ(gp.gp_Ax2(gp.gp_Pnt(0,0,0),gp.gp().DZ()),1); #make a few edges e1 = BRepBuilderAPI.BRepBuilderAPI_MakeEdge(circle,5,6.2).Edge(); TestDisplay.display.showShape(e1); for e in normalEdgesAlongEdge(e1,0.1,0.1 ): TestDisplay.display.showShape(e); e2 = BRepBuilderAPI.BRepBuilderAPI_MakeEdge(gp.gp_Pnt(0,0,0),gp.gp_Pnt(1,1,0)).Edge(); TestDisplay.display.showShape(e2); for e in normalEdgesAlongEdge(e2,0.1,0.1 ): TestDisplay.display.showShape(e);
