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Showing 60 discussions, ordered by the latest archived activity.
The face is a part surface bounded by edges, and edges are organized into wires. How do i know if a point on the surface is inside or outside the wire？ This point is generated from UV parameters, so it is on the surface, i want to know whether the point is in valid range (inside the wire).
I use pythonocc to load a STEP file, and then I want to extract geometry info of its every surface. My STEP file is a simple pipe（pipe.png）It have 6 faces: the pipe has 2 cylindrical outer surfaces, 2 cylindrical inner surfaces, and the top and bottom annular planar surfaces, totaling 6 surfaces. Ho
Hi everyone, I have 2 breps and i would like to get their intersection (see image attatched). The shapes are valid closed solids and they do intersect. However the result is a topods_compound that does not contain any geometry. Does anyone have any tips how to fix this? The report says "BOPAlgo_Aler
Following is my code that exports Shape to GLTF base54 encoded string. But its all grey. How do I add materials? def export_shape_gltf(shp: TopoDS_Shape, asc: bool = False) -> str: """ Export shape to gltf Returns the base64 encoded gltf (glb) file """ doc = TDocStd_Document("pythonocc-doc-gltf-expo
Hello all, I have observerd a strange behavior in the QtViewer when I move my mouse over some surfaces. The surfaces are created using BRepPrimAPI_MakeRevol , revolving a single edge around the z-axis. I create one surface that is completely parallel to the z-axis, and another where the surface is a
Experts, I'm looking for convert JT to STL pythonOCC source code. OCC JT import/export components can't convert JT to STL. CAD Assistant can view JT, but can't save as STL. Help!
Hi, I am trying to make simple converter from GTLF (GLB) to STEP format. I am using a simple box as my test input (see attached .zip). Reading of the GTLF file seems to work fine using: # Create an handle to a document doc = TDocStd_Document("gltf-convert-doc") # Create GLTF reader gltf_reader = RWG
Hi, i am using the following code to get the faces from CATIA, but I don't know how can i calculate the normals for these faces. There is so way to first convert the CATPart to stp and then use python occ (GProp_GProps) but i don't want to use that method. import win32com.client def search_items(sea
Hello, I am new to PythonOCC. Currently, I am working on a project where I need to build a 3D blade from airfoil data. There are 10 airfoils in the Excel file. After exporting the 3D coordinate points for all the airfoils (each airfoil has 199 data points with x,y, and z coordinates), I create wires
Example of camera parameters obtained from the OCC GUI: ----------------------------------------------- Eye: 113.976, -113.976, 48.7797 Direction: -0.57735, 0.57735, -0.57735 Up: -0.408248, 0.408248, 0.816497 Scale: 182.058 AxialScale: 1,1,1 Aspect: 1.60714 ------------------------------------------
Hello, I am new to PythonOCC. For my project, I am trying to import a CSV file that contains the coordinates of some airfoil profiles. My plan is to import in those points, create splines through the points to construct 2D airfoil profiles, and then loft and connect these 2D profiles to build a 3D w
How can I get the solid, faces, edges, and vertices from this STEP file id: #28=TRIANGULATED_FACE('',#26,10,((-1000.,-0.,-0.)),$,(),((10,9,8),(10,8,7),(10,7,6),(10,6,5),(10,5,4),(10,4,3),(10,3,2),(10, 2,1))); Thanks in advance.
Hello everyone. I want to be able to use Python to read a .STP file, exported by solidworks as STEP 242 using MBD. In the read file, I want to be able to find the edges that I mark in the SW as weldments. By looking at the ASCII of the .STP file I can see this line: #69=TESSELLATED_SHELL('Weld Bead1
Hello, I am currently trying to create a function which checks whether a 3D-Point (gp_Pnt(0,0,0)) is inside a TopoDS_Face Object. While browsing other forum topics I came across the BRepClass_FaceClassifier, which does exactly that but only in 2D. Is there a simple way using OCC, or do I have do do
Hi, I have a pythonOCC-file with something like the following: from OCC.Display.SimpleGui import init_display ... ... class myOCCclass: def __init__(self, args): .... self.display, self.start_display, self.add_menu, self.add_function_to_menu = init_display() When I run it, I get something like: qt-p
Hello Idk why my isocurve lies outside the surface. I have attached images for reference. from OCC.Display.SimpleGui import init_display from OCC.Core.BRepBuilderAPI import BRepBuilderAPI_MakeEdge, BRepBuilderAPI_MakeWire from OCC.Core.TColgp import TColgp_Array1OfPnt from OCC.Core.gp import gp_Pnt
Hey everyone, I have been encountering a challenge with PythonOCC in my CAD project, specifically while working on 3D modeling and mesh generation tasks. Despite diligently following the documentation and relevant examples, I'm facing unexpected behavior in the output. For instance, issues arise whe
I attempted to offset some surfaces in a STEP file, but the offset was not applied correctly. Here is the code I used and the output I got. CODE: from OCC.Core.TopoDS import topods_Face, TopoDS_Face from OCC.Core.STEPControl import STEPControl_Reader from OCC.Display.SimpleGui import init_display fr
Hi there, I'm looking for the best way to update a shape that is already displayed. I've noticed that pythonocc seems to use EraseAll, which only hides shapes, not remove them. I was considering saving the AIS_Shape output when you use DisplayShape and using it as a reference, but I'm finding it har
I am looking to manipulate a camera in pythonocc. I want to make an orbit camera: Camera is always looking at 0,0,0 Right Mouse Drag X rotates camera around the y axis in the scene Right Mouse Drag Y raises or lowers the tilt or yaw of the camera, but to never exceed 90 deg or go below -90 deg Mouse
Hi together! Currently i am working on a little project using pythonocc, and have a problem I can't get my head around. My problem is the following: I have a solid and a plane. I would like to project the solid onto this plane to create a new 2 shape (the "outline" of the solid). Then, i would like
I created a shape using Booleans and then tried to export it to the STEP file, but the output was wrong. I was successfully able to export it in IGES and BREP. Code to Replicate it. from OCC.Core.BRepPrimAPI import * from OCC.Core.gp import * from OCC.Core.TopLoc import * from OCC.Core.BRepAlgoAPI i
I have this function: shape = read_step_file(input_path) t = TopologyExplorer(shape) edges = [] for edge_idx, edge in enumerate(t.edges()): d = {'edge': edge, 'edge_index': edge_idx, 'vertices_coordinates': []} vertices = t.vertices_from_edge(edge) for i, vertice in enumerate(vertices): c = vertice.
Hi there, I am trying to load a Step file on a Jupyter notebook/Jupyter-lab file. However, when I execute STEPControl_Reader.TransferRoot() the kernel dies. If I run the same code via a python script everything works fine. Is this a known issue? step_reader = STEPControl_Reader() step_reader.ReadFil
Hi, I want to write a python code to project a brep on xy plane. I found this C++ code and was hoping to convert it to pythonOCC: https://dev.opencascade.org/node/77142#comment-11973 However the class Prs3d_Projector seams to no longer be available in OOC Version 7.7.0 ( https://dev.opencascade.org/
In PythonOCC, I am trying to make a tooltip or popup of sorts to display some text when I click a sphere that I created in 3D space. The code that I used and the resulting window is attached below. I would greatly appreciate it if anyone could explain how I can add a tooltip using PythonOCC to direc
Hi, how do I get rid of a hole completely? I tried fusing it with a shape that has the same geometry but the edges of the hole are still there. I want an approach that removes it entirely as if it was never there.
Hello I am getting a wrong oriented bounding box for a TopoDS_Shell consisting of two rectangular faces in the XY plane rotated by 23 degrees about the Z-axis. The long side of the overall shape is 2 and short is 1 but I get 0.75 and 0.5.The body was imported using the STEP file importer and I used
Hi together, i made a wire from edges, and now i am trying to create a face from it. I used BRepBuilderAPI_MakeFace(wire), however the result seems wrong. The resulting face and wire are visualized in the picture i attached. Appearently, the MakeFace has problems with round parts of a wire. Does any
I want to use PythonOCC to load a file saved in .xbf format then save it in .step format. I have attached C++ code that works fine. Below is my PythonOCC script which doesn't work. Can anyone tell me what I need to do to get this to work? #!/usr/bin/env python """ File: read-XDE.py copyright 2022 Do
When using TNaming_NamedShape and FindAttribute to get the attribute from a label, I cannot get the shape stored in that attribute, the return is None. Is there anyone who has the same problem with me?
OCC.Extend.DataExchange module read_stl_file(filename) opens a stl file, reads the content, and returns a BRep topods_shape object I thought this method is too slow to read a STL file, when it's come to 100M. Has anyone found and solved this problem, thanks you.
Dear all, I'm finding several difficulties in a very simple tool that creates a box. All the surfaces of the box are defined starting from simple curves, by means of the BRepOffsetAPI_ThruSections function. Each curve is built from a list of points (by means of GeomAPI_PointsToBSpline) provided as i
How does PythonOCc read GLTF files?
I used OCCViewer's method, which is called DisplayMessage to display some number. Now, I want to know how can I erase them, thanks.
When I import FreeCAD and Part module, I also import some module in OCC.Core. But, I got some errors listed below. "ImportError: /OCC/Core/_STEPControl.so: undefined symbol: " However, if I only import one of them,(e.t. only import OCC or only import FreeCAD), I won't got the above errors. So, can a
Dear all, Would anyone kindly help me? I can pay around USD 500 for this task. I would like to write a GUI (PyQt5) to do the following: 1. The user opens a Step file. 2. On the 3D view, the user can rotate the model and select some surfaces. 3. When the user clicks a button "Select", then the select
I am having trouble invoking the method to get the handle and orientation of the current edge of a face. I did this from OCC.Core.BRepClass import BRepClass_FaceExplorer from OCC.Core.BRepClass import BRepClass_Edge from OCC.Core.TopAbs import TopAbs_Orientation facetopo = BRepClass_FaceExplorer(fac
Dear all, I'm quite new to pythonOCC, so let me apologize if my question will results trivial for the experts. I'm trying to develop a tool in which the user can select different faces of an object. I would like also to include a function to hide some selected faces. Unfortunately, after several att
I am using the blanking algorithm in occ. I want to know how I should find the corresponding line data in the three-dimensional entity through the line data after the blanking. thank you very much!
Hello all, I am a newcomer and have very little experience with pythonOCC. I ran a few examples and realized how powerful it is... However I have a quite specific need, and wonder if pythonOCC is the right technology for that. I would like to import a step file, and generate a rastered top view of t
I'm having a very strange issue when apply a display.FitAll() to two simple shapes. The first shape is a cube (CUBE_ON_ZERO.stp) generated by an external CAD in the world position (0,0,0). When I try to display.FitAll() everything is correctly shown: the shape is properly fitted in the view. Archive
Hello! I have a question about working with BRepPrimAPI_MakeRevol. I create a faсe and apply BRepPrimAPI_MakeRevol. Creation code: from OCC.Core.BRepBuilderAPI import BRepBuilderAPI_MakeEdge, BRepBuilderAPI_MakeWire, BRepBuilderAPI_MakeFace from OCC.Core.BRepPrimAPI import BRepPrimAPI_MakeRevol from
Hello, I have a model with surface that has holes in it (for exmaple - cylidriical holes) I have identified the type of the surface, but I need now to get the dimensions of the holes - I can I do it using pythonocc? Please advice Zofit
Hi, I would like to create a 2d arc (or segment) of a conic. The controls are: Point A, Point B, tangent angle at point A, tangent angle at point B and the conic constant (rho). This type of object exist in commecial CAD packages (Proe, Solidworks,..) Thanks for the help! Stephane.
I am working on a code to use the BRepPrimAPI_MakeHalfSpace command. It works with Windows 7, but has an error on Linux (CentOS 7.7). The error is: Traceback (most recent call last): File "Example_Case_Fail.py", line 10, in <module> half_space_obj = BRepPrimAPI_MakeHalfSpace(temp_face, gp_pnt_obj) F
I'm trying to split a very complex solid in 2 portion using a prism. I keep getting an error: RuntimeError: StdFail_NotDone BRep_API: command not done Here is a snippet that reproduce the problem box = BRepPrimAPI_MakeBox(5,5,5).Shape() profile = BRepBuilderAPI_MakeEdge(gp_Pnt(-1., 2., 0.),gp_Pnt(6,
Hello everyone, i want to disassemble a shape, save it in three lists (a vertices list with coordinates, a edges list with numbers of vertices that refer to the vertices list, a wires list with numbers of edges that refer to the edges list) and rebuild the shape again afterwards. It works fine for m
Hi, All I've asked question few days ago wrt getting and extracting features from the STEp file using OCC/Python. See https://www.opencascade.com/content/extract-shape-parameters-topodssolid... details, STEP file itself and solution proposed by Guido. I pretty much converted his code to Python-OCC (
Hello everyone, I am trying to find whether there was an intersection between two faces. I need the result True or false. For this intersection, I used GeomAP_IntSS for finding the intersection. But the problem is, even two faces doesnot intersect each other, it returns True. Can anyone help me why
We need to import parasolid (X_T) file format and check some geometry data like: volume, surface area, etc. I understand Open CASCADE Technology -The Parasolid Import interface reads X_T.
I'm making an app that's primarily for visualization, not manipulation. That is, I just want to show the user how things relate to each other, they don't have to be able to change much. My app is based off of 'wxDisplay.py' and 'OCCViewer.py'. What I've got is a bunch of solid objects, lines, and po
Hello, We are using Bnd_Box api to calculate a bounding box of a component (STEP & IGES format) parallel to all principle planes. However this does not give the exact dimensions for the bouding box and has some tolerance added to these values. For example a cylinder with a diameter 100 and height 50
Hello, I'm new with OCC and pythonOCC. I need to load a step file, which is working. It contains an assembly of three components. I want to make these components selectable. Unfortunately following the examples (with SimpleGUI), I can only select the whole component (or surfaces). How can I access t
Hi, I'm having some issues trying to convert a curve and surface into Bezier segments/patches, the functions GeomConvert_BSplineCurveToBezierCurve GeomConvert_BSplineSurfaceToBezierSurface Even though the curve and surface are rather complex, both just generate 1 curve/patch resp . Perhaps I'm missi
Hi All, I'm having issues working with transparency in pythonocc, which is wrapping OCC 6.8.0. In the image you see that the larger box is at 90% transparency, while the smaller darker grey shell lies within the box, but is rendered on top of it. Is there a flag in ( V3d_View? ) that I need to set s
Hello, I am using pythonocc. I could successfully cut sphere and box. When I try same code with imported STL files, it does not perform cut. It does not give any error as well. Fude operation with same imported STL files work well. The code and STL files are attached.
Hello guys, i downloaded and installed PythonOCC like written on the pythonOCC homepage and with simply testing : from OCC import * i got this error: Traceback (most recent call last): File " ", line 1, in from OCC import * File "C:\Python26\lib\site-packages\OCC\Standard.py", line 28, in _Standard
Hello everybody! I am trying to find out the normal vectors in two planar surfaces. These surfaces construct the end parts of a blade turbine models (the uploaded image). Apparently, the surfaces normals are (-1,0,0) for the first one and (1,0,0) for the second. The BRepLProp_SLProps.Normal() functi
Hello Everybody! I triangulated a face using BRepMesh_IncrementalMesh and BRepTool_Triangulation methods as follows: MyMesher=BRepMesh_IncrementalMesh(Surf1Shape,0.5) MyMesher.Perform() MyMesher.Update(Surf1Shape) ff=MyMesher.IsDone() Face1Tri=BRep_Tool_Triangulation(TheSurf1,T) Everything OK till h