I’m very sorry, although I asked this question before, I still don’t know how to draw thousands of 3D polygons using root. I saw the TPolyLine3D class, but it is for drawing lines. I want to know why there is no TPolygon3D class, or is there any other way to achieve 3D polygon drawing? Sorry for ask…

Hi, ROOT supports the drawing of sophisticated detector geometries. Can these code examples be of inspiration ROOT: Geometry tutorials ? Best, D

I have looked at examples, but I don’t know which one suits me! I only found the TGeoPolygon class, but it is a 2D polygon class!

I used multiple TGraph2D to draw multiple triangles, but there was a memory leak and the resulting image was a bit strange [1713861767255] [1713862551090] I don’t understand why there are so many dotted lines that seem to come out from the origin of the windows auto c = new TCanvas("c", "Gr…

And it seems that this way of writing cannot be exported to PDF format files

To draw 3D shapes, the best is to use TGeo shapes. Do you have an example/picture showing what you want to achieve ? @agheata can help you with TGeo.

Thank you for the reminder. I have the final result chart with two effects [dailog_ConstructTriFaultGeoModel] [dailog_ConstructRecFaultGeoModel] One is to draw a face based on the coordinates of a 3D triangle, and the other is to draw a face based on the coordinates of a 3D rectangle. Although t…

That’s not TGraph2D data style. TGraph2D is a 3D curve … not a shape. I let your see with @agheata to provide you examples.

Ok thanks, looking forward to examples

Is there a specific example that can be provided?

Hi, I don’t know if you want to draw many rectangles with 3D vertices, or many 3D boxes. If you just rectangles, you should use TPolyLine3D like: auto pl = new TPolyLine3D(5); // need to repeat first point for closure pl->SetLineColor(kRed); pl->SetNextPoint(-1, -1, 0); pl->SetNextPoint(-1, 1, 0); …

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