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 How to produce vectors with no head (and, even better, arrows with a full fletching and no head...) |
| Posted by Daniel on Feb-22-2016 22:02 |
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Hi Peter,
I am trying to get vectors on top a scatterplot with some specific vector information added. The design includes a classical arrow and an additional one with no "head" of any kind, and, possibly even better one with fletching and no head as well.
I just do succeed at dropping the head, let alone add some gracious fletching! When I drop the "head" with a zero-or-something setArrowhead or setArrowHead2 the line is also dropped.
The error is certainly on my side. Is there a way to produce the output? I do not mind adding two vector layers to build the arrows that are wished for. But I'm stuck at this time:(
Regards
Daniel |
| the image produced |
| Posted by Daniel on Feb-22-2016 22:07 |
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The head is hidden by the point but is it present. We want it dropped:)
Regards
Daniel
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| Re: the image produced |
| Posted by Peter Kwan on Feb-23-2016 02:42 |
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Hi Daniel,
I have tried myself using by modifying the "Vector Chart" sample code to use:
Set layer = c.addVectorLayer(dataX, dataY, dataR, dataA, cd.YAxisScale, &H0000cc)
Call layer.setArrowHead(0)
Call layer.setLineWidth(10)
The resulting arrows contain no arrow head, and just a thick arrow stem. So they are arrows without arrow head, and is essentially a long and thin rectangle.
To create an arrow stem with a fletching, you may use a custom polygon as the arrow stem. For example:
shape = Array(-20, 0, 0, 20, 20, 0, 40, 0, 15, 30, 15, 100, -15, 100, -15, 30, -40, 0)
Call layer.setArrowStem(shape)
Hope this can help.
Regards
Peter Kwan
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| Re: the image produced |
| Posted by Daniel on Feb-23-2016 16:15 |
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Hi Peter,
The layer.setArrowHead(0) instruction works beautifully in terms of output (see second piece attached)....But this very instruction currently generate runtime errors - the COM object is aborted - in a COM-based interpreter-based environment on WIN32 ? la VB6 when passing a ZERO parameter.
I have temporarily replaced this very API call (setArrowHead(0) - non null values do operate properly by way. A negative value - setArrowHead(-1) - did the trick as well. Possibly a bug. That's why I want to share. Bugs are quite a rarity with CD indeed!
Daniel
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| Re: the image produced |
| Posted by Peter Kwan on Feb-24-2016 01:14 |
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Hi Daniel,
I will try to reproduce the problem. Would you mind to inform me which version of ChartDirector you are using?
Regards
Peter Kwan |
| Re: the image produced |
| Posted by Daniel on Feb-24-2016 02:24 |
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>I will try to reproduce the problem.
Great
>Would you mind to inform me which version of ChartDirector you are using?
I send you the information as email.
Daniel |
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