The axis of an elliptic cylinder is a 3D curve, and its cross section at any position is an ellipse. The 3D curve and a series of cross-section ellipses are known. That is to say, we know the 3D coordinates of the curve and ellipses at any position. I have no idea to draw the elliptic cylinder. Woul...

Got the problem. The reason is that the following code is used for TChart.Axes.
LabelsSeparation := 0;
So, TChartAxis skip calculating overlapping labels.

By default, Axis Labels are often too sparse. Is there a better way to mark Axis Labels as closely as possible? Except, LabelsSeparation := 1.

In a Point3Dseries, is there a way to show perfect spheres as Pointers?
Would you like to give me an example?

Although the following codes are used, Axis Labels of Increment, Minimum and Maximum values does not show a "rounded" value. What's the story? for i := 0 to aChart.Axes.Count - 1 do begin with Axes[i] do begin …… Automatic := true; RoundFirstLabel := true; MinimumRound := true; MaximumRound := true;...

My problems have been basically solved, except SubChart is roughly positioned.
Thanks for your clear explanations and detailed codes.

Your code makes it clear to me how to get SubChart.ChartRect. Really helpful, thanks a lot!! In my app, the position (SubChart.Left, SubChart.Top) and size (SubChart.Width, SubChart.Height) of the SubChart are unkown at the beginning. I’m trying to display the SubChart by using SubChart.ChartRect as...

Yes, it works well.
If Charts have Margins (MarginTop, MarginBottom, MarginLeft, MarginRight) and Axes have Offsets (MinimumOffset, MaximumOffset), how to modify the code ?
Thanks a lot.

Yes, that’s correct.

I'm not sure what you mean exactly by 'proportional scales', but the way I understand it would be to add something like this (but not necessarily in this particular place in the code): What I’m trying to achieve is for the SubChart to have the same scales as TheChart. For example, in the case of th...

The second change addresses your third point and homogenizes Chart display characteristics by the application of a theme to both charts. By the application of a theme to both charts, Chart display characteristics have successfully homogenized. It seems that Chart display characteristics are reset t...

That's just great !!! I'm not sure about your second point, as the TheChart and SubChart contain series with different data, and so will show different axes label values. In this app, assume that the size (width and height) of SubChart is smaller than that of TheChart. Firstly, I want the proportion...

Is this what you would expect? Of Course Not. I corrected the code, and the chart appears. Before I start spending the time to look at the code, would you please be so kind as to tell me what you expect the app to do, and where you think the problems are? I developed an application before, and ther...

Yes, it works fine.
Based on your code, I wrote a test program and it does not work. Please find attached.
Would you like to help me find out what the problems are?

Yes, I installed TeeChartVCLFMX-2020.30.exe. When compiled from the source in the "Examples\Features" folder, [MSBuild Error] as shown above raise.
In Windows 7, it works despite some minor problems. But, in Windows 10, it does not run from the start menu of New Features Demo 64.

[MSBuild Error] The "CreateRcFile" task failed unexpectedly. System.UnauthorizedAccessException: Access to the path 'C:\Program Files (x86)\Steema Software\Steema TeeChart Pro VCL FMX 2020.30\Examples\Features\Tee9New.vrc' is denied. at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullP...