incorrect (no) display of bezier series

[AHS]

When try to draw a 2D bezier, there is no line in the chart.
If switching to 3D, there is a 2D "border" line in the chart.

I need a correct display of a 2D bezier curve!

To demonstrate the false behaviour just take a look to the "Teechartgdiplus.exe", you can download (on 20th of april 2007) at steema site or just click this Link to Demo.

1. Extract and execute the Teechartgdiplus.exe file;
2. on coming up window click the edit button (the 7th button just right of "3D" button);
(the "Edting Chart1" window appears; Series1 is marked;)
4. press button "Change...";
5. on new "TeeChart Gallery" window press tab "Extended";
6. on panel "Extended" press "Bezier";
7. close "TeeChart Gallery" window by clicking on "OK" button;
8. close "Edting Chart1" window by clicking on "close" button;
9. now you see a 2D bezier curve, but it should be drawn as 3D;
10. click button "3D" to deactivate it and the curve vanishes;
11. click button "3D" again to reactivate the 2D curve, which should be the 3D one;
12. click radio button GDI+ and wonder about the displayed things

When you view the "Bezier" sample on the "Extended" tab panel on the "TeeChart Gallery" window, you see the same behaviour, if you toggle 3D.

How to fix this

[Narcís]

Hi AHS,

Thanks for your report. This is certainly a bug (TV52012181) which I have added to our defect list to be fixed for future releases.

In the meantime there are 2 solutions:

1. Change BezierStyle as this only happens with bsWindows, for example:

Code: Select all

  Series1.BezierStyle:=bsBezier3;

2. Set Bezier series pointer to 2D and chart's 3D percent to the minimum value possible:

Code: Select all

  Series1.Pointer.Draw3D:=false;
  Chart1.Chart3DPercent:=1;

[AHS]

Addition:
The bsBezier4 style works for 2D mode too:

Code: Select all

Series1.BezierStyle:=bsBezier4;