Anben:
Let me know if you decide to attempt this. I might be able to offer some
suggestions and help.
Landon
On Thu, Aug 8, 2013 at 7:20 AM, Martin Davis <[email protected]> wrote:
> As I said in that note, this is theoretically possible, with some careful
> and somewhat geometrically complex coding. Unfortunately this hasn't been
> done yet.
>
> In order to make this change you're going to need to fully understand how
> the OffsetCurveBuilder code works. At that point you should be able to
> determine how to modify it yourself.
>
>
> On 8/8/2013 6:17 AM, Anben PANGLOSE wrote:
>
> I found a old thread talking about that I think:
> http://sourceforge.net/mailarchive/message.php?msg_id=25822538
>
> *([Jts-topo-suite-user] Buffer for LineString with different buffer
> values for each side of)*
> **
> Dr JTS said it was feasible using spiral? Is it the same problem?
> I am using the buffer operation to convert simple lines into walls. Each
> segment of the linestring is a wall, and each wall can have its own
> thickness. My problem are the joints and the end caps that JTS handle very
> brillantly. I thaught it would be possible to change the algorithm used in
> JTS to consider a different distance parameter for each segment in the
> linestring.
>
> Where in the code do I have to change the _distance variable to achieve
> my goal?
>
> @Landon Blake: I cannot split my input linestring into smaller chunks
> and then buffer eash segment, because I need the joint between each
> segment. After the merging of all the resulting polygon I will not have
> nice joints.
>
> Anben.
>
>
> *From:* Landon Blake <[email protected]>
> *Sent:* Thursday, August 8, 2013 2:51 PM
> *To:* Anben PANGLOSE <[email protected]>
> *Subject:* Re: [Jts-topo-suite-user] Buffer operation with linestring,
> variable distance per segment
>
> Anben:
>
> I'm pretty sure JTS doesn't do this out of the box. One work around would
> be to split your input linestring into smaller chunks based on the buffer
> widths. Then buffer them independently and merge the resulting polygons.
>
> Landon
>
>
> On Thu, Aug 8, 2013 at 3:25 AM, Anben PANGLOSE <[email protected]>wrote:
>
>> Hello, first of all thank you for this wonderful tool! i am using the
>> c# port of JTS. I am new to JTS and i am trying to use the BufferBuilder
>> class to compute polygon from linestring. It works like a charm, my problem
>> is: Is there any way to compute the buffer from linestring but instead of
>> using a constant distance, I would like to associate a distance per segment
>> in the linestring (so that the distance parameter in the buffer operation
>> is not a global parameter but associated with a segment).
>> To illustrate:
>>
>> input:
>> LINESTRING (90 480, 90 290, 320 290)
>> (it’s a simple L)
>>
>> output with the buffer operation with a distance = 20:
>> POLYGON ((110 310, 320 310, 340 310, 340 270, 70 270, 70 480, 70 500, 110
>> 500, 110 310))
>>
>> I would like for example to specify to BufferBuilder that the vertical
>> part of the L have a distance = 20, and that the horizontal part of the L
>> has a distance = 10 to have this output:
>> POLYGON ((110 300, 320 300, 340 300, 340 280, 70 280, 70 480, 70 500, 110
>> 500, 110 300))
>>
>> Do you think this is possible? I am trying to modify the
>> OffsetCurveBuilder class but without any success, can someone help me?
>> Where to start?
>>
>> Thanks in advance and excuse my poor english, i speak french...
>>
>> Anben.
>>
>>
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>
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