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Hello JSlyadne Your quick reply helped me a lot! thank you very much! !

Hello Even using healing tools such as ShapeFix could not prevent the negative area. Therefore, I gave up on getting the area with BRepGProp::SurfaceProperties and decided to get the area by triangulating each face and calculating the sum of the areas of the triangular elements. I was able to...

Sorry for the late reply. Quaoar,Thank you for your advice.

Thanks calciffer and Quaoar for your replies. I apologize for the inconvenience. I can't attach the test data as I can't externalize it. I do appreciate your kind words, and I will keep them in mind. The loaded model is a JT file, but when I checked it in the OpenCascade view, it looked like...

Hello． This is my first time submitting a form. This website has always helped me. I am a beginner in working with OpenCascade. I used BRepGProp::SurfaceProperties to get the area of a shape, but I got negative area values. When I get the area for each Face of the shape in TopExp_Explorer, I...