def get_front_surface(stl_file, p1, p2):
show_log("get_front_surface", "001")
stl_reader = StlAPI_Reader()
stl_shape = TopoDS_Shape()
show_log("get_front_surface", "005")
# Read takes 5 minutes
stl_reader.Read(stl_shape, stl_file)
#pickle.dump(stl_shape, open( "get_front_surface 001.tmp", "wb" ) )
# stl_shape = pickle.load( open( "./get_front_surface 001.tmp", "rb" ) )
# t = Topo(stl_shape)
# print("number of faces: %i" % (t.number_of_faces()))
#OCC.RWStl.rwstl().ReadFile(stl_file)
#time.sleep(10)
#cos theta should be less than 0.5, theta is the angle between 1,0,0 and the face normal
show_log("get_front_surface", "010")
box = BRepPrimAPI_MakeBox(p1, p2).Shape()
show_log("get_front_surface", "012")
# BRepAlgoAPI_Common takes 3 minutes
CommonSurface = BRepAlgoAPI_Common(box, stl_shape).Shape()
ais_stl_shape = display.DisplayShape(stl_shape)
# ais_box = display.DisplayShape(box)
# ais_common = display.DisplayShape(CommonSurface)
# display.Context.SetTransparency(ais_box, 0.8)
display.Context.SetTransparency(ais_stl_shape, 0.8)
# orig = OCC.BRepBuilderAPI.BRepBuilderAPI_MakeVertex(gp_Pnt(0,0,0))
# display.DisplayShape(orig.Shape())
return CommonSurface
def booleanIntersection(shp1, shp2):
""" THis doesnt f****n work"""
from OCC.BRepAlgoAPI import BRepAlgoAPI_Common
intrs = BRepAlgoAPI_Common(shp1, shp2)
# print(intrs.BuilderCanWork())
if intrs.BuilderCanWork() is True:
intrs.Build()
intrs.RefineEdges()
intrs.FuseEdges()
# cut.SetOperation()
# assert_isdone()
# print(intrs.IsDone())
shp = intrs.Shape()
intrs.Destroy()
return shp
def common(event=None):
# Create Box
axe = gp_Ax2(gp_Pnt(10, 10, 10), gp_Dir(1, 2, 1))
Box = BRepPrimAPI_MakeBox(axe, 60, 80, 100).Shape()
# Create wedge
Wedge = BRepPrimAPI_MakeWedge(60., 100., 80., 20.).Shape()
# Common surface
CommonSurface = BRepAlgoAPI_Common(Box, Wedge).Shape()
display.EraseAll()
ais_box = display.DisplayShape(Box)
ais_wedge = display.DisplayShape(Wedge)
display.Context.SetTransparency(ais_box, 0.8)
display.Context.SetTransparency(ais_wedge, 0.8)
display.DisplayShape(CommonSurface)
display.FitAll()
def grid_face(occ_face, udim, vdim):
#returns a series of polygons
pt_list = []
face_list = []
fc = face.Face(occ_face)
umin, umax, vmin, vmax = fc.domain()
u_div = int(math.ceil((umax - umin) / udim))
v_div = int(math.ceil((vmax - vmin) / vdim))
for ucnt in range(u_div + 1):
for vcnt in range(v_div + 1):
u = umin + (ucnt * udim)
v = vmin + (vcnt * vdim)
occpt = fc.parameter_to_point(u, v)
pt = [occpt.X(), occpt.Y(), occpt.Z()]
pt_list.append(pt)
for pucnt in range(u_div):
for pvcnt in range(v_div):
pcnt = pucnt * (v_div + 1) + pvcnt
#print pcnt
pt1 = pt_list[pcnt]
pt2 = pt_list[pcnt + v_div + 1]
pt3 = pt_list[pcnt + v_div + 2]
pt4 = pt_list[pcnt + 1]
occface = make_polygon([pt1, pt2, pt3, pt4])
face_list.append(occface)
#intersect the grids and the face so that those grids that are not in the face will be erase
intersection_list = []
for f in face_list:
intersection = BRepAlgoAPI_Common(f, occ_face).Shape()
compound = fetch.shape2shapetype(intersection)
inter_face_list = fetch.topos_frm_compound(compound)["face"]
if inter_face_list:
for inter_face in inter_face_list:
intersection_list.append(inter_face)
return intersection_list
from OCC.gp import gp_Pnt, gp_XYZ, gp_Mat, gp_GTrsf from OCC.BRepPrimAPI import BRepPrimAPI_MakeSphere, BRepPrimAPI_MakeBox from OCC.BRepBuilderAPI import BRepBuilderAPI_GTransform from OCC.BRepAlgoAPI import BRepAlgoAPI_Common from OCC.Display.SimpleGui import init_display display, start_display, add_menu, add_function_to_menu = init_display() orig = gp_Pnt(0., 0., 0.) sphere = BRepPrimAPI_MakeSphere(orig, 50.).Solid() # be careful that the following scale numbers are "not too big", # otherwise boolean operations can be buggy # see isue a1 = 17.1 a2 = 17.1 a3 = 3.5 gTrsf = gp_GTrsf(gp_Mat(a1, 0, 0, 0, a2, 0, 0, 0, a3), gp_XYZ(0., 112.2, 0.)) ellipsoid = BRepBuilderAPI_GTransform(sphere, gTrsf).Shape() # then perform a boolean intersection with a box box = BRepPrimAPI_MakeBox(gp_Pnt(-1000, -1000, -1000), gp_Pnt(1000, 112.2, 1000)).Shape() common = BRepAlgoAPI_Common(box, ellipsoid).Shape() assert not common.IsNull() display.DisplayShape(box, color = "BLACK", transparency = 0.8) display.DisplayShape(ellipsoid, color = "BLACK", transparency = 0.8) display.DisplayShape(common, color = "BLACK", transparency = 0.8, update=True) start_display()
def _do_operation(self,shape1,shape2):
d = self.declaration
args = [shape1,shape2]
if d.pave_filler:
args.append(d.pave_filler)
return BRepAlgoAPI_Common(*args)
def intersect(self, toIntersect):
"""
Construct shape intersection
"""
return Shape.cast(
BRepAlgoAPI_Common(self.wrapped, toIntersect.wrapped).Shape())
p1 = gp_Pnt(0, 0, 0)
p2 = gp_Pnt(0, 10, 0)
p3 = gp_Pnt(10, 10, 0)
p4 = gp_Pnt(10, 0, 0)
rect = make_closed_polygon(p1, p2, p3, p3)
display, start_display, add_menu, add_function_to_menu = init_display()
#my_box = BRepPrimAPI_MakeBox(10., 20., 30.).Shape()
stl_reader = StlAPI_Reader()
stl_box = TopoDS_Shape()
stl_reader.Read(stl_box, './models/box.stl')
axe = gp_Ax2(gp_Pnt(-10, 1, 1), gp_Dir(0, 0, 1))
box = BRepPrimAPI_MakeBox(axe, 50, 15, 15).Shape()
CommonSurface = BRepAlgoAPI_Common(box, stl_box).Shape()
topo = Topo(CommonSurface)
display.EraseAll()
x_mid_max = -100
front_face = None
for face in topo.faces():
bbox = Bnd_Box()
OCC.BRepBndLib.brepbndlib_Add(face, bbox)
xmin, ymin, zmin, xmax, ymax, zmax = bbox.Get()
x_mid = (xmin + xmax) / 2
if x_mid > x_mid_max:
x_mid_max = x_mid
front_face = face
t_face = Topo(front_face)
def boolean_common(occ_shape1, occ_shape2):
intersection = BRepAlgoAPI_Common(occ_shape1, occ_shape2).Shape()
compound = fetch.shape2shapetype(intersection)
return compound
def intersection_solid(shp1: tds.TopoDS_Shape, shp2: TopoDS_Shape) -> TopoDS_Shape:
""" Solid Solid intersection
:param: shp1 - TopoDS_Shape1
:param: shp2 - TopoDS_Shape1
"""
return _bool_op(BRepAlgoAPI_Common(shp1, shp2))
