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Showing 60 discussions, ordered by the latest archived activity.
Hello, I try to build a new project using ImportExport from OpenCascade. I created a new MFC project in VS 2005, set the include paths and insert "#include ". Then I started building and got the following error: "fatal error C1189: #error : 'Wrong compiler options has been detected. Add /DWNT option
Hi All, I was trying to get the Geom_BSplineSurface to generate a B-Spline surface by putting inputs as the control points/ poles, u and v knot, u and v degree. I do not know how to input knots, as in if it is [0 0 0 1 2 3 3 3] (just an example), how do I type that in the Geom_BSplineSurface . Secon
Hi, I have been using DEFINE_HSEQUENCE and IMPLEMENT_HSEQUENCE to define individual sequences like that: DEFINE_HSEQUENCE(AttributeHandleSequence, NCollection_Sequence<Handle(TDF_Attribute)>) IMPLEMENT_HSEQUENCE(AttributeHandleSequence) but the more I think about it, the more I wonder why I have don
Hello, I have recently updated from OCCT 6.7.9 to OCCT 6.8.0, and according to the release notes, I had to do the following change (since it seems Graphic3D.hxx no longer exists): From this: ================================================================================================== #include C
Hello, I am a new user of OpenCacade Library. I am facing an issue while using the Message_ProgressIndicator class of the library. I have overridden the Show() method in the my own child class of Message_ProgressIndicator where I get the name and position of the Message_ProgressScale using GetName()
Hi Body, I use "BRepOffsetAPI_MakeOffset" in OCC4.0 and OCC3.1 to create a offset wire and try to use different Join type(GeomAbs_Tangent,GeomAbs_Arc,GeomAbs_Tangent), but the results are the same, the Join type seems always keep GeomAbs_Arc. Who can tell me, it is OCC Bug or my way is wrong. my cod
How do I get the shape given a name? I've tried the following with no success for IGES and STEP files: char shapeName = "M-11"; IGESCAFControl_Reader::GiveList(shapeName); It is returning a null list and the following message: Neither Entity Number/Label nor Selection :M-11 The name is shown when vi
I got memory leak when I use OpenCascade and got following memory issue. How do I clean it up? I am not familiar with OpenCascade. Thanks for your help. Author ==6867== 40,168 bytes in 3 blocks are still reachable in loss record 785 of 793 ==6867== at 0x4C2CC70: calloc (in /usr/lib/valgrind/vgpreloa
We are using IGESControl_Reader we noticed that there is memory leak when using IGESControl_Reader we found this memory leak when working on using VRAM for our software we tried the following instructions to free memory used by IGESControl_Reader without success 1) myIgesReader.IGESModel()->Destroy(
Hello, I have to perform a lot of "is point inside a shape" queries in my application. Currently I am doing the query through the BRepClass3d_SolidClassifier with some preliminary filtering (bounding box) but the code is quite slow so I am looking for some hints how to speed it up. The points (x,y,z
Hi, I have found a strange behaviour of Open CASCADE 6.8.0 (but using the community edition) and I would like to share my measurements with you and ask for your experiences. My code is doing computations on shells by iterating over their faces and evaluating points and derivatives (D0 and D1). I hav
Hi All, I have a small problem !. I create an arc using, Handle(Geom_TrimmedCurve) curve = GC_MakeArcOfCircle(...) however, when I examine the type of this curve later on using downcasting..... Handle(Geom_TrimmedCurve)::DownCast(curve).IsNull() returns true but..... Handle(Geom_Circle)::DownCast(cu
hello, the following code causes a crash in the oc6.9.1: TopoDS_Shape o_face; BRep_Builder o_builder; BRepTools::Read (o_face, "c:\\cylface.brep", o_builder); //attached file gp_Trsf o_trafo; o_trafo.SetTranslation (gp_Vec(500,0,0)); BRepBuilderAPI_Transform o_trafo_algo (o_face, o_trafo); o_face =
Hi Everyone, I have written a code to convert from IGES/IGS file to STL file. When i was using OCC-6.6.0 this code was working perfectly, Due to some reasons i had to migrate to Visual studio 2013 so i downloaded OCC 6.9.1, Now i am facing with weird issue which i am not able to resolve. I have atta
Hi all, I am using Qt 4.2.2 with VC++ 8.0 & OCC 6.1 and getting the folllowing compile time error: 1>c:\OpenCASCADE6.1.0\ros\inc\Standard_values.h(22) : fatal error C1189: #error : "Wrong compiler options has been detected. Add /DWNT option for proper compilation!!!!!" What could be the probable rea
I am student and new to opencascade,this might be a very basic question but I couldn't find necessary tutorials to find the answer. Thanks in advance
Hi, I'm trying to sweep a profile on a spline but it seems that the profile remains in the same orientation... I'm using the BRepOffsetAPI_MakePipe(spine, profile) function. The attachment is a drawing that shows the desired result...
Dear All, I have been trying to figure out how the following function work in TKMath, in the package for BSplines: void BSplCLib::Bohm(const Standard_Real U, const Standard_Integer Degree, const Standard_Integer N, Standard_Real& Knots, const Standard_Integer Dimension, Standard_Real& Poles) Accordi
Hi, Looking for a mesher to convert from STEP/IGES to my own data format, I need to use a mesher. 1st question : What is the deflection ? I didn't found anything about that. And what about the Angle ? (default = 0.5) 2d question : Why is there so much mesher ? is there a best one ? * BRepMesh_Increm
Hi I can i load .STL file in OpenCasCade ? I found STL writer but not STL reader in ImportExport sample.
Hello, I have implemented a presentation driver for my own OCAF attribute. The presentation driver inherits from TPrsStd_Driver. Now I would like to add text output at several different positions to the presentation. Is there an easy way to do that? I have stumbled over the class QABugs_MyText, whic
Hi I have a question I have created bounding box. I want to translate it does anyone know how to do it thanks
I have two gp_Lin elements (lin1 and lin2), and I know that they intersect in 3D space (the value of lin1.distance(lin2) is 0). Is there a function I can use to find the point at which they intersect instead of coding it all by hand (I could not find one)? Thanks for any help! Author
Hi, everyone~~. I would like to use the tree structure to show the shape topology of OCCT entities, where a sub_shape is represented by a tree node(QTreeWidgetItem in Qt). Hence, I want to make the sub_shape selected or highhighted by clicking the the tree node item, intead of the selection in the s
The contstructor of V3d_Viewer has two parameters which refer to the computed mode: const Standard_Boolean theComputedMode= Standard_True , const Standard_Boolean theDefaultComputedMode= Standard_True According to the documentation, these parameters refer to HLR (hidden line removal). If our applica
Hi, I am trying to do a simple boolean operation in 2d. Essentially, all I need is the common area between a circle and another face. Unfortunately, I could not find any algorithm that would do this directly in 2d. Does anyone know an algorithm here? Then, I tried to produce 3d TopoDS_Faces from it
Hello, I tried to split a curve in set of curve with a same lenght. for a straight line , it is very simple, but in my case i have a general curve Geom_Curve. Does anyone have any suggestions for me? Thanks in advance
Dear all, I configure my development environment with occ6.9.1 successfully， But when I debug it ,there is a problem and turn to " void Standard_Failure::Throw() const { #ifndef NO_CXX_EXCEPTION throw *this; #endif }" I found thir program have problem "Handle(WNT_Window) aWNTWindow = new WNT_Window(
Is it possible to use BRepFeat_SplitShape functionality with more then one (intersecting) edge/wire? See the attached picture. Archived image: external image
I'm using the IGESControl_Writer to write out some points. I use the "write.iges.faces.mode" for the writer. The problem is that the points in the IGES file can be imported by OpenCASCADE IGESControl_Reader properly. Solidworks can detect the points in the IGES file, but I can't import them. I put a
Hello Im new to opencascade. I have a question i want to add/merge 2 bounding boxes ... i know how to make a bounding box but i dont know how to merge/add them ? your suggestions or remarks would be highly appreciated thanks
i use OpenCasCade 6.7.0. When I Call the function BRepAlgoAPI_Cut and check ErrorStatus() i get 114 as result. Watching in documentation i got following Information: 0 - Ok 1 - The Object is created but Nothing is Done 2 - Null source shapes isstrong text not allowed 3 - Check types of the arguments
Dear ALL, I want to use occt 6.8 with vs 2010 to develop my application ,but I am new to use it , Do you have a very simple demo? Regards,
Hi, Does AIS_Trihedron support a shading mode? By default, its appears to be rendered as a wireframe mode, and by glancing the source code it seems like a shaded mode ( like the GraduatedTrihedronDisplay method of the V3d_View class ) is not support. That said, the documentation is not explicit abou
Hi, I cannot find any way to search for an question o aswer in this new forum. How can I do it ?
In BSplCLib::LocateParameter (called by SameParameter API), it will produce crash bug in some extreme case (OCC6.5.3 and OCC6.7.1). If your program got crash after stitching(sewing) in release version, it may be produced by BSplCLib::LocateParameter. Here is the code: void BSplCLib::LocateParameter
Hello eryar, I had to do the following change (since it seems Graphic3D.hxx no longer exists): From this: ================================================================================================== #include Create a Graphic Driver from the default Aspect_DisplayConnection Handle(Aspect_Displa
I have been trying to get BRepBuilderAPI_MakeFace working but I have had some issues. First it was that the edges weren't connected into wires, so I used ShapeAnalysis_FreeBounds::ConnectEdgesToWires to get a closed wire, then I have seen other posts were they specify tolerances for the wire before
Hello! I am trying to draw a spring but i am doing one turn at once and then another turn until n(number of turns), but when i use BRepOffsetAPI_MakePipeShell or another function to do a pipe always remains a blank space where the Shapes doesn't fits, so my final shape when a use the BRepAlgoAPI_Fus
Hi I drew a arc. I want to know end Point and start point of arc. I wrote This Code gp_Ax2 a2(gp::Origin(), gp::DZ()); gp_Circ c(a2, 10); double startAngle = 180.0; double endAngle = 90.0; TopoDS_Edge arc = BRepBuilderAPI_MakeEdge(c, DEGTORAD(startAngle), DEGTORAD(endAngle)); draw(arc); BRepAdaptor_
Hello, I have tried to port the OCC bottle example (samples/qt/tutorial) to Qt 5.4. Since there is no QWorkspace anymore, I have replaced it by QMdiArea. The windows for a document (in the sample called MDIWindow) inherit from QMainWindow (then I can add a tool bar). I add them to the QMdiArea with
Hello! I am trying to draw a spring but i am doing one turn at once and then another turn until n(number of turns), but when i use BRepOffsetAPI_MakePipeShell or another function to do a pipe always remains a blank space where the Shapes doesn\'t fits, so my final shape when a use the BRepAlgoAPI_Fu
Hi, What functions are been added to manage the OCC6.9.0 new feature Shape proximity detection ?
Since OCC 6.9.0 there is an option to explicitly request OpenGL core profile (see http://tracker.dev.opencascade.org/view.php?id=25854 ). By default, compatibility profile is requested on Desktops. Does anything speak against requesting core profile if my application does not use custom OpenGL comma
I have ported an application from version 6.6.0(32bit) to 6.9.0(64bit). The application is a toolpath simulator and displays, one by one, entities like segments and arcs using AIS_* objects. The application loads all the objects in an Interactive context, hide them , and than display one object a ti
Dear sirs May you please confirm or exclude that the crash occurring at the last line of following code is due to bug of the Geom_BezierCurve constructor ? main.cpp: ---------------------------------------------------------- #include #include #include #include #include int main(int argc, char *argv[
Read more at http://opencascade.blogspot.com/2015/08/arbitrary-law-based-curve-and-su...
When the shape geometry has narrow gap, "Offset" value larger than the gap in "BRepOffset_MakeOffset" may cause fault result. Is that a bug in OpenCascade? Any other better solutions in OCC? The attached file is the perfect result in SolidWorks.
I figured out that the destructor of a StlMesh_Mesh is very slowly. It takes about one or two minutes till it is finished. In this thread http://www.opencascade.org/org/forum/thread_24440/?forum=3 there is exactly the same problem with another class, but no solution was posted. Is there a way to mak
Hi, a main rule concerning OCAF is that is not possible to add two identical attributes (same classes) to a given label. Let us consider the TDataXtd_Point attribute. By adding this attribute in the label LAB, automatically a TNaming_NamedShape (BRep_TVertex) is added. Let us consider the TDataXtd_A
Hi I have many connected and disconnected edges(vector). I'm want to convert TopoDS_Wire(vector thanks.
Hello All, I used GeomAPI_PointsToBSpline to generate a bspline curve. when I use the high tolerances such as 0.5 it seems that the output is not within the specified tolerance. I attached the pic of output which is plotted in MS Excel shows a deviation much more than 0.5. Any idea would be apprecia
Dear all, I am trying to split a face using one edge (which intersects two edges and split the face in two) using the BRepFeat_SplitShape class. I am absolutely positive the edge has got a PCurve on the face. Indeed, I do a test using BRep_Tool::CurveOnSurface and the Handle to the Geom2d_Curve is a
Dear Sirs, There is something I am not able to understand. I have a Handle(Geom2d_Curve) and an Handle(Geom_Surface)from which I create a TopoDS_Edge using the corresponding constructor from the BRepBuilderAPI_MakeEdge class. Note that the Handle(Geom2d_Curve) has been computed by projecting a Geom_
Hello, I found when the shape geometry has narrow gap, "BRepOffset_MakeOffset" may cause fault result. For example, I create a box as base, place another two boxes with space of 0.2 onto the base and fuse the three shapes together. Then if I set the "Offset" value smaller than 0.1, I can get correct
Hi, with my OCCT based program I check and modify geometry and I am expecting lengths to be given in millimeter. For example when I measure distances between shapes, I expect the distance value to have unit millimeter. Now I have recognized that STEP files can define geometry with arbitrary units an
I am using OpenCascade 6.3.0
Dear all, I am working on scaling a curve only in x direction and the Y and Z value of the curve keep the same. The class used is BRepBuilderAPI_Transform which required a gp_Trsf as an iput. However, the SetScale() function in gp_Trsf only accept a scale center and a scale value. It can not do this
Hi I would like to know is there any API which support 2D coordinates projection into to arbitrary 3D plane.
hello, I tried to compiler my application from windows MSVC 2013 to ubuntu g++. I could configure and make opencascade 6.7.1 form source package in my ubuntu computer,but I could't use qt creator to compiler my application. The error message is: /home/cglab/opencascade-6.7.1/inc/Standard_Macro.hxx:4