def drillWithHoles(shape):
"returns a shape with a bunch of spheres removed from it"
box = Bnd.Bnd_Box()
b = BRepBndLib.BRepBndLib()
b.Add(shape, box)
cShape = shape
(xMin, yMin, zMin, xMax, yMax, zMax) = box.Get()
d = 0.05 * ((xMax - xMin))
di = 4.0 * d
c = 0
#drill holes in a rectangular grid
for x in frange6(xMin, xMax, di):
for y in frange6(yMin, yMax, di):
for z in frange6(zMin, zMax, di):
c += 1
print "Inter %d " % c
#make a sphere
center = gp.gp_Pnt(x, y, z)
hole = BRepPrimAPI.BRepPrimAPI_MakeSphere(center, d).Shape()
cut = BRepAlgoAPI.BRepAlgoAPI_Cut(cShape, hole)
cut.SetOperation(3)
#3 is cut21
tmp = cut.Shape()
#store the newly cut shape
if cut.ErrorStatus() != 0:
print "Error %d cutting" % cut.ErrorStatus()
else:
print "Success!"
cShape = tmp
return cShape
def getBoundingBox(self):
'''
Returns Bounding Box of this solid
The bounds are returns in an array [xmin, ymin, zmin, xmax, ymax, zmax]
'''
box = Bnd.Bnd_Box()
b = BRepBndLib.BRepBndLib()
b.Add(self.shape, box)
return box.Get()
def boundingBox(shapeList):
"get a bounding box for a list of shapes"
box = Bnd.Bnd_Box()
b = BRepBndLib.BRepBndLib()
for s in shapeList:
b.Add(s, box)
bounds = box.Get()
return bounds
def __init__(self, shape):
self.shape = shape
box = Bnd.Bnd_Box()
b = BRepBndLib.BRepBndLib()
b.Add(shape, box)
self.bounds = box.Get()
self.xMin = self.bounds[0]
self.xMax = self.bounds[3]
self.xDim = abs(self.xMax - self.xMin)
self.yMin = self.bounds[1]
self.yMax = self.bounds[4]
self.yDim = abs(self.yMax - self.yMin)
self.zMin = self.bounds[2]
self.zMax = self.bounds[5]
self.zDim = abs(self.zMax - self.zMin)
def getBounds(self):
"Get the bounds of all the faces"
t = Timer()
box = Bnd.Bnd_Box()
b = BRepBndLib.BRepBndLib()
for f in hSeqIterator(s.faces):
b.Add(f, box)
bounds = box.Get()
xMin = bounds[0]
xMax = bounds[3]
yMin = bounds[1]
yMax = bounds[4]
zMin = bounds[2]
zMax = bounds[5]
return [xMin, xMax, yMin, yMax, zMin, zMax]
def computeBounds(self):
"Get the bounds of all the faces"
if self.bounds == None:
box = Bnd.Bnd_Box()
b = BRepBndLib.BRepBndLib()
for f in OCCUtil.hSeqIterator(s.faces):
b.Add(f, box)
bounds = box.Get()
xMin = bounds[0]
xMax = bounds[3]
yMin = bounds[1]
yMax = bounds[4]
zMin = bounds[2]
zMax = bounds[5]
self.bounds = [xMin, xMax, yMin, yMax, zMin, zMax]
return self.bounds
def drillWithHolesFaster(shape):
"returns a shape with a bunch of spheres removed from it"
box = Bnd.Bnd_Box()
b = BRepBndLib.BRepBndLib()
b.Add(shape, box)
(xMin, yMin, zMin, xMax, yMax, zMax) = box.Get()
d = 0.05 * ((xMax - xMin))
di = 3.0 * d
vec = gp.gp_Vec(gp.gp_Pnt(0, 0, 0), gp.gp_Pnt(0, 0, d))
cp = None
compound = TopoDS.TopoDS_Compound()
builder = BRep.BRep_Builder()
builder.MakeCompound(compound)
#drill holes in a rectangular grid
for x in frange6(xMin, xMax, di):
for y in frange6(yMin, yMax, di):
for z in frange6(zMin, zMax, di):
#make a sphere
center = gp.gp_Pnt(x, y, z)
hole = BRepPrimAPI.BRepPrimAPI_MakeSphere(center, d).Shape()
#lets see if a square hole is faster!
#w = squareWire(center,d );
#hb = BRepPrimAPI.BRepPrimAPI_MakePrism(w,vec,False,True);
#hb.Build();
#hole = hb.Shape();
builder.Add(compound, hole)
display.DisplayShape(compound)
q = time.clock()
cut = BRepAlgoAPI.BRepAlgoAPI_Cut(shape, compound)
if cut.ErrorStatus() == 0:
print "Cut Took %0.3f sec." % (time.clock() - q)
return cut.Shape()
else:
print "Error Cutting: %d" % cut.ErrorStatus()
return shape
def computePixelGrid(face, resolution=0.1):
"""
makes a pixel grid of a face at the requested resolution."
A dictionary is used to store the values.
"""
box = Bnd.Bnd_Box()
b = BRepBndLib.BRepBndLib()
b.Add(face, box)
TOLERANCE = 5
bounds = box.Get()
xMin = bounds[0]
xMax = bounds[3]
xDim = abs(xMax - xMin)
yMin = bounds[1]
yMax = bounds[4]
yDim = abs(yMax - yMin)
zMin = bounds[2]
pixelTable = {}
for y in Wrappers.frange6(yMin, yMax, resolution):
#create a horizontal scan line
edge = Wrappers.edgeFromTwoPoints(gp.gp_Pnt(xMin - TOLERANCE, y, zMin),
gp.gp_Pnt(xMax + TOLERANCE, y, zMin))
#get list of wires from the face
#TODO:// this should be encapsulated by a face abstraction
wires = []
ow = brt.OuterWire(face)
wires.append(ow)
for w in Topo(face).wires():
if not w.IsSame(ow):
wires.append(w)
#compute intersection points with each wire
#this is a hack because i know how to make edges from lines
#but really, it would be better to do 2d here and use
#Geom2dAPI_InterCurveCurve
xIntersections = []
for w in wires:
#display.DisplayShape(w);
brp = BRepExtrema.BRepExtrema_DistShapeShape()
#display.DisplayShape(edge);
brp.LoadS1(w)
brp.LoadS2(edge)
if brp.Perform() and brp.Value() < 0.01:
for k in range(1, brp.NbSolution() + 1):
if brp.SupportTypeShape1(
k) == BRepExtrema.BRepExtrema_IsOnEdge:
xIntersections.append(brp.PointOnShape1(k).X())
if len(xIntersections) == 0:
print "No intersection found."
continue
#else:
#print "there are %d intersections " % len(xIntersections);
#sort intersection points by x value
xIntersections.sort()
#fill pixel table with values on surface based on scanlines
#TODO: for now ignore horizontals and edge vertices, this is just a test
#better to use a generator here too
#also need to implement edge table of scanline fill
if (len(xIntersections) % 2 == 0):
i = 0
inside = False
cx = xMin
#print xIntersections;
while i < len(xIntersections):
cint = xIntersections[i]
if inside:
while cx < cint:
key = (cx, y)
pixelTable[key] = 1
#print cx;
cx += resolution
else:
while cx < cint:
cx += resolution
#print cx;
continue
i += 1
inside = not inside
else:
print "Odd number of intersections encountred."
#displayPixelGrid(pixelTable);
return pixelTable