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 3d scatter chart |
| Posted by Thomas Bendzko on Oct-15-2012 02:56 |
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Dear Peter,
The charting library is great!
Since Version 5.1 a 3D scatter chart is included but I'm missing to use the same chart with lines (see attached picture). Will this feature be included in future releases?
Thanks, Thomas.
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| Re: 3d scatter chart |
| Posted by Peter Kwan on Oct-15-2012 23:29 |
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Hi Thomas,
A truely accurate 3D multiline chart is quite difficult without using true 3D APIs (eg. OpenGL or DirectX), but such APIs are often not useful or available for server side applications.
The main difficulty is that the line segments can mutually overlap in 3D (something like the 5 olympic rings that mutually overlap), and forming some complex "spaghetti". It means that in general we cannot draw the line segments in any order. Instead, some true 3D algorithms (eg. like Z Buffer with extension to handle transparency) must be used. Another issue is that current vector graphics standard (like HTML 5, SVG, etc) does not support true 3D algorithms.
We are aware some products can draw 3D line charts by simply ignoring the possibility of mutually overlapping line segments. We are still considering how we may support 3D lines in future versions of ChartDirector.
Regards
Peter Kwan |
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(Thomas Bendzko) 