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  How to fill in the area encircled by this Spline on an XYChart
Posted by Patrick on Jan-08-2018 09:40
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I have an XYchart that is used to plot the bulls-eye looking symbol on this 4-quadrant grid. I would like to use a spline to surround the bulls-eye and fill in the middle of that area with a semi transparent gray. I use 5 data points to create the spline with the first and last data points are the same to enclose the shape.
4style.png

  Re: How to fill in the area encircled by this Spline on an XYChart
Posted by Patrick on Jan-10-2018 04:19
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I realize this isn't what a spline is supposed to be used for, but I was hoping there would be a way to fill the area, or use a different method to achieve the same results.

Thanks!

  Re: How to fill in the area encircled by this Spline on an XYChart
Posted by Peter Kwan on Jan-10-2018 15:04
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Hi Patrick,

Sorry for the late reply.

One method you can try is to a scatter layer with a large symbol under your original symbol. You can use the ChartDirector pre-defined symbols, or specify a custom symbol using an image file or a polygon. See:

http://www.advsofteng.com/doc/cdcom.htm#builtinsymbols.htm

http://www.advsofteng.com/doc/cdcom.htm#bubblescale.htm

http://www.advsofteng.com/doc/cdcom.htm#scattersymbols.htm

http://www.advsofteng.com/doc/cdnet.htm#DataSet.setDataSymbol4.htm

Like most other graphics program, the "curve" (or spline) in ChartDirector is actually a polyline (many straight line segments). If the line segments are short, it will look like a curve. So a curved shape in computer graphics can be implemented as a polygon.

If your shape is fixed, you can create a large image (using Windows paint or photoshop, etc), and just use that image as the symbol.

Regards
Peter Kwan