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Showing 60 discussions, ordered by the latest archived activity.
When I use this function to generate a loft, if the constructed polygon is a concave polygon with a large concave angle, the loft will fail to be constructed. When I debug it, the program throws exception: Unhandled exception at 0x00007FFD7FB8CD29 (in MyOCCT.exe): Microsoft C++ exception: Standard_C
I use OpenCascade V7.4.0 for windows 32bit. I tryed to get shape difference by BRepAlgoAPI_Cut , but the process of BRepAlgoAPI_Cut constructor is not return. My application memory keep growing from 100MB to 1.5GB and finally my application crashed. [MyCode] BRepAlgoAPI_Cut cut( shapeBase, shapeCut)
Hello, I have 3D cloud points that are annotated from computed tomography images. In OpenCasCade, I want to do the following: 1. Make a 3D parametric surface that passes through all points with a predefined threshold. 2: After having the 3D surface, I want to trim in two steps. Initially, I want to
hi, may i ask for help? when i debugging and check my variable it is hidden for me, how to display it? Thank you Author myData[theIndex].entity->__vfptr[1] myData[theIndex] = {entity=0x000001b317e85940 <Information not available, no symbols loaded for TKG2d.dll> }
Hi all, I want to get the maximum encumbrance of a solid in revolution around an axis. The solid may have an arbitrary shape and I have to get the outer contour of the shape generated by the revolution of the initial solid around an axis. Have any one an idea of how can i do this ?
Hello, I am using the following code snippet to fix small faces of a given shape. Handle(ShapeFix_FixSmallFace) sffsm = new ShapeFix_FixSmallFace(); sffsm->Init(shape); sffsm->SetPrecision(tolerance); sffsm->Perform(); TopoDS_Shape shapeGet = sffsm->FixShape(); After that, I want to get the modified
Hello All, I am creating a dot-dash line type in the viewer by creating AIS_Line and then setting the appropriate line aspect for that. Is it possible to get the TopoDS_Edge/Shape in the dot-dash form from it? Or is it possible to create TopoDS_Edge/Shape of that type in the first place? Thanks & Re
Hello all, I have an Ellipse (height 800, width 200) and try to find a) the point on the ellipse on a given height 60 b) the tangent at the point found (please see attached sketch) gp_Pnt center(0.0, 0.0, 0.0); gp_Dir dir = gp::DX(); gp_Ax2 axis(center, dir); gp_Elips ellipse_gp = gp_Elips (axis,800
Hi, I need to fuse 10 TopoDS_Solid which represent simple 3D boxes. I found this peace of code on the official OCC web site ( https://dev.opencascade.org/doc/overview/html/specification__boolean_ope... ): #include <TopoDS_Shape.hxx> #include <TopTools_ListOfShape.hxx> #include < BRepAlgoAPI_Fuse.hxx
Hello, When I use BRepAlgoAPI_Cut to cut tool(some cylinders)，the result is not as what I wish, some cylinders seem cutted right, but others have errors: TopoDS_Shape shape = revol.Shape(); TopoDS_Shape tool = *rollers; BRepAlgoAPI_Cut brep_cut(shape, tool); I tried cut cylinder one by one, but the
Hi All, I would like to add an internal edge to face, as shown by the red line in the figure. I wish the face wasn't divided into two. Which interfaces should be used to implement this function? And what is the final topology structure?
I want to create a bounding box for a created shape box. Below is the basic code attached. void MakeBox() { BRepPrimAPI_MakeBox abox(1, 1, 1); TopoDS_Solid aShape = abox.Solid(); Bnd_Box box; BRepBndLib::Add(aShape, box); Standard_Real aXmin, aYmin, aZmin, aXmax, aYmax, aZmax; box.Get(aXmin, aYmin,
I need to be able to approximate the swept volume generated by sweeping a 2d-surface (possibly non-planar) in 3d-space. The sweep can be parametrized by a 3x3 rotation matrix R(t) depending on a parameter t (we can think of it as time) and a translation vector also depending on t. In the documentati
I want to put multiple AISInteractiveObjects to a mutual Bnd_Box and then get coordinates of the center of this Bnd_Box . I noticed that BRepBndLib::Add gets TopoDS_Shape, but nothing about ais interactive, so how to either put AISInteractiveObject or get a TopoDS_Shape from AISInteractiveObject? Or
Hi: While I import STEP file and show 3D graphics by OCC,I want to recoginize some different geometry of Process ,such as cylinder hole,rectangle hole,Wedge hole,or more complex configuration.then,How can I recognize it by C++ code? Thanks Author
This code produces invalid shape. Input shapes are both valid of course. auto shape1 = BRepPrimAPI_MakeSphere(gp_Pnt(1, 1, 1), 1).Shape(); auto shape2 = BRepPrimAPI_MakeCylinder(1, 1).Shape(); auto op = BRepAlgoAPI_Cut(shape2, shape1); op.Build(); auto shape3 = op.Shape(); BRepAlgoAPI_Check analyzer
Dear OCC Community, I am currently exploring meshing using OCC and I'd like to know if I reached a dead end. I am familiar with how tesselation works for OCC when you want to create an STL, for example. However, is it possible to force the mesher to place Nodes inside using one of the OCC's algorith
Hi all, I currently use BRepGProp::VolumeProperties() to calculate the mass of a solid body. Code snippet is below GProp_GProps props1; BRepGProp::VolumeProperties(solidBody, props1, 1e-3, Standard_True); double mass = props1.Mass(); While this worked correctly for most of the cases, several cases d
Hi Friends, Interesting case I didn't managed to figure out. The attached file is a very simple Wire. It is composed of 8 Edges, with 2 of them overlapping. I want to get, somehow, the 2 closed manifold sub-wires and discard the overlapping (ie. 2 disconnected wires with 4 edges each). What I've tri
Hi I am using the BRepAlgoAPI_Splitter to split a shell with a closed wire. I need as a second step to choose the faces which are inside the wire. Currently at a loss on how to detect this; attached is a step file with the result of an example splitting and the wire used. Thanks.
GeomConvert::SurfaceToBSplineSurface fails for a surface of linear extrusion because it's unbounded/infinite in the V direction. I tried to use the adaptor's UTrim and VTrim interfaces but got the same error (i.e. inifinite surface). Is there another way to do this? Thank you.
For example: Handle(AIS_Shape) aBox = new AIS_Shape("cube") How can I select two points on the side of this cube and display the distance between them
Hello, I have to questions regarding TopoDS_Compound 1: whats the diferences between TopoDS_Solid and TopoDS_Compound? After using the BRepOffsetAPI_MakeOffsetShape PerformByJoin or PerformBySimple method i get a TopoDS_Compound I want to cut a Shape out of the compund. When i do cut the Shape after
Why the Boolean algorithm is more slower in version 7.6 than in version 7.4？
I imported an igs model. Then I want to discretize each of its faces into a grid. I try to use "TopExp_Explorer","TopTools_MapOfShape". Then what I need to do?
I am going to write a tool to discrete the model, but I want to simplify the chamfer, does there have a tool or lib to detect the chamfer?
Hello, I want to get a model that eliminates shape2 from shape1. However, the following program will break the shape. Is there any good solution? [code] BRepAlgoAPI_Cut cut( shape1, shape2 ); cut.Build(); shape3 = cut.Shape(); [Environment] Opencascade: V7.5.3 OS: Windows 10 Pro 64bit CPU: Intel(R)
When I get the UV values on the plane, there are only max and min values. But I want to get all the values on the face, is this possible? when I use BRepTools::UVBounds on the plane. Why is the UV value on the plane not 0 to 1, but a specific value? How can I cut the trapezoid to get the plane norma
Hi! I’m trying to offset a face 360 degrees . I tried different approaches but none of them worked properly, so I got stuck and I don't know how to continue. I'm going to explain to you what I want to achieve and what I tried until now, hoping that maybe you can offer me some suggestions or guidance
Hi Bros, I'm JianBaoxia. I get a .step file, it consist of several TopoDS_Edge. I try to build the edges into a wire, and then try to express the wire as a BSpline curve. First I try to sort the edges through the "ShapeAnalysis_WireOrder", however, the status is -1, means "some edges are reversed, b
Currently, I do not have much idea about what is the meaning of "Degenerated edges". If someone could explain this, that would be very helpful. I tried to find detail about that but could not get clear idea. Also, I saw there are "Degenerated shapes", "Degenerated vertex" and "Degenerated curves". B
After the sew and discrete operation of igs files, there seems to be a non-manifold edge in the model, I want to know how to deal with it, is there a specific library or other solutions, the picture in the attachment is a discrete view, one edge covers three faces
Hello: I want to delete the step file after importing it. The Step file is imported by STEPCAFControl_Reader. Then the reader transfer into (TDocStd_Document) doc. The doc is inited by XCAFApp_Application. After everything is done. The doc is closed by XCAFApp_Application::Close(doc). But I still ca
Hello Forum! How can I get a boolean result (Shape3) ? What sequence of actions?
Hello all! How to get the position - relative to the attached object - from a AIS_Manipulator? Handle(TopLoc_Datum3D) locManipulator = m_manipulator->LocalTransformationGeom(); qDebug() << "locManipulator" << locManipulator->Transformation().TranslationPart().X()<< locManipulator->Transformation().T
I read a IGES file by IGESControl_Reader and used BRepMesh_IncrementalMesh to discrete it, but it creates some gaps. Now I want to know how to close these gaps, does opencasde have any libraries that can handle it？ the BottleCap.IGS is the model file. and the picture in attachments is the problem I
I am offsetting conical body using BRepOffset_MakeOffset API and getting inner and outer edges of the base and top of cone are not in line with each other. BRepOffset_MakeOffset offsetShape = new BRepOffset_MakeOffset(solid, thickness, Precision.Confusion(), OCC.BRepOffset.BRepOffset_Mode.BRepOffset
Hello Forum! I have an existing project which successfully uses the OpenCascade 7.5.0 library. But when I tried to use OpenCascade to triangulate different TopoDS_Shape from .STEP files I have figured out that OpenCascade triangulation is not good for solvers algorithms so I have decided to include
Is there any way in OCC can achieve the effect of spraying: for example, solving the intersection of a surface and a solid, and being able to assign thickness to it? It feels like the common Boolean operations RepAlgoAPI_Section, BRepAlgoAPI_Common, BRepAlgoAPI_Cut, and BRepAlgoAPI_Fuse don't quite
Hello Everybody, I need to measure the angle between a flat surface and a cylindrical surface with opencascade. For example for holes. When i try to use Angle_dimension, all times return 0. Maybe someone know how to do this. Thank you in advance
Hi, I am trying to create a loop (a bit like a thin ring) from a BSpline Surface where two of the edges are co-incident. Is there a way to create either: - a surface that is infinite in one direction (i.e. around the ring) - or a shell where the edges have been sewn together? See the uploaded image
The question is: When I translate stp file to igs format, the intersection between planar face and curved face becomes disconnected. There are free bounds appear using ShapeAnalysis_FreeBounds to detect them. But I didn't find functions to heal these free bounds. Is there any solution can do this in
I have a B-Spline 3d curve , built from an array of 3d points calling a function like this: Handle(Geom_BSplineCurve) aBSplineCurve = aBSpline.Curve(); where aBSpline comes from GeomAPI_PointsToBSpline . This is ok. Now I want get discrete 3d points on that curve, using "GCPnts_UniformAbscissa" clas
Hi, I want to load a STL file and then want to work on the mesh deleting triangles if need be. What are the classes dedicated to such a task? In a second time, I need to intersect this mesh with a plane, is there an operation to do it on the mesh directly? Or should I convert the mesh into a TopoDS_
I have a couple a of planar 2D geometries which share some edges. What's a good way to find the common edges? Upon googling I found an old post ( https://dev.opencascade.org/content/finding-common-edges-two-surfaces ) which works with contiguous edges (but this may not be the case with me). Also, so
Hi, I don't understand how to make multiple transformations at once and get the result. I'm not sure if it is a problem with the order in which it should happen. The gp_Trsf seems to make one transformation at a time and therefor I think multiple gp_Trsf must be chained to get the result. My use cas
Dear everyone: I now work on a mesh generation application with open Cascade. However, the constraints, including the vertex, curves and surfaces have to be standardized or checked before the the grid tessellation. That means, the intersections of these constraints have to be obtained. I have check
Is there any function like AIS_InteractiveContext::EraseSelected, I want to delete the created graph and release the memory Thanks for your help.
Ciao let consider the step file in the attached picture: the number of edges is 19. A TopoDS_Shape is readed and loaded with a standard step reader (.oneShape()): this is "aShape" in the following TopTools_IndexedMapOfShape allEdges; TopExp::MapShapes(aShape,TopAbs_EDGE,allEdges); cout<<"____total n
Is there a way to smoothen a staircase like edge in a 2D geometry? In general please point me to some smoothing example.
I am using the below to triangulate a shape: int main() { TopoDS_Shape box = BRepPrimAPI_MakeBox(gp_Pnt(0, 0, 0), gp_Pnt(1, 1, 1)); BRepMesh_IncrementalMesh aMesher(box, 1.2, Standard_False, 1.8, Standard_True); TopExp_Explorer ex; for (ex.Init(box, TopAbs_FACE); ex.More(); ex.Next()) { TopoDS_Face
I have below questions about them: 1. Is there a way to supply a list of shapes to BRepAlgoAPI_Fuse as one can do for BRepAlgoAPI_BuilderAlgo? If yes, please provide sample code. 2. Can we also set parallel run and glue options for BRepAlgoAPI_Fuse as shown below for BRepAlgoAPI_BuilderAlgo: BRepAlg
What's an efficient way to fuse millions of voxels together. 1. Voxels are all cubiodal. 2. Voxels may share boundaries but they never intersect.
I am getting the following warnings during BRepAlgoAPI_BuilderAlgo::Build: 1. BOPAlgo_AlertBadPositioning 2. BOPAlgo_AlertNotSplittableEdge What are the possible reasons for the above? Additionally, the SimplifyResult step isn't merging all the faces together. What could be the problem there? Below
I would like to merge two cuboids such that their common faces also get merged. Currently, I am not able to get those common faces merged with the below code: [code] const TopoDS_Shape b1 = BRepPrimAPI_MakeBox(10, 10, 20); const TopoDS_Shape b2 = BRepPrimAPI_MakeBox(gp_Pnt(5, 0, 0), 30, 30, 30); con
Hi, I have a body and an aligned point cloud. I need to color every points. I used BRepExtrema_DistShapeShape class but distance calculation of 225k points took lots of time. Is there any other option to calculate? Thank you. Code: Handle(Graphic3d_ArrayOfPoints) points = aisPC->GetPoints(); Handle(
How to create TopoDS_Shape class from MeshVS_DataSource class? class TopoDS_Shape I will use to get properties (SurfaceProperties, VolumeProperties and etc)? Or other question: How to get properties from MeshVS_DataSource?
Here is the code to reproduce the issue: #include <iostream> #include <gp_Ax2.hxx> #include <TopoDS_Shape.hxx> #include <BRepPrimAPI_MakeTorus.hxx> #include <StlAPI_Writer.hxx> #include <BRepMesh_IncrementalMesh.hxx> void Generate_Shape(TopoDS_Shape * store) { gp_Ax2 axis = gp_Ax2(gp_Pnt(0,0,0), gp_
Hello, I am trying to get direction (gp_Dir) from TopoDS_Edge object. Is there any way to do it? Thanks, Author
Hello. I want to get the shape as one solid of the shell stretched. When I tried following code, the result shape was compound shape. How to get shape as one solid? [shell] Archived image: 003-shell.png [shape] Archived image: 004-shape.png [code] shape = BRepPrimAPI_MakePrism( shell, gp_Vec( srX, 0