[OpenLayers-Users] Edit a "freehand polygon"

[Tim Schaub]

Hey-

Eric Lemoine wrote:
> Tim, what kind of advanced geometry ops are you thinking of? Are you
> referring to drawing functionalities? Anyway this makes me think of
> the addins we're talking about. This lib could be an OL addin. Thx.
> Eric
> 

I'm just thinking about having more geometry operations available client 
side.  Things like simplify, union, buffer, subtract, etc.

I think I will start a new lib for them (and have it work with OL 
geometries).

Tim


> 2008/2/12, Tim Schaub <tschaub at openplans.org>:
>> Hey-
>>
>> Swärd Mårten wrote:
>>> Hello!
>>>
>>> I need some functionality that makes it possible to edit the points in a
>>> freehand drawn polygon. I know that it's tecnicaly possible to do this
>>> but in real life the edit function, as I know it, is very time
>>> counsuming to use due to the many points that has to be modified. The
>>> two questions that I have are as follows:
>>>
>>> A) Is it possible to change the edit function so that when you edit one
>>> point the naigbor points follows.. And so to say smoothen the curve of
>>> the edited point relative to the rest of the points..
>>>
>>> B) If the answer is a big NO on A. =) Is it possible to reduce the
>>> number of points that is drawn when using the freehand mode?
>> This would be an easy modification.  The draw feature control could take
>> a tolerance property in the handlerOptions and addPoint would only get
>> called in freehand mode when the tolerance was met.
>>
>>> B II) Or is it possible to reduce the number of points on a polygon
>>> after you have drawn it?
>> This would require a simplify (Douglas Peucker style) method for
>> geometries.  If there is interest in building a library of more advanced
>> geometry operations client-side, it might do well as a compliment to
>> OpenLayers (not in OL itself).  I'm interested in this.
>>
>> Tim
>>
>>> Best regards: Mårten
>>>
>>>
>>> ************************************************************************
>>>
>>> *Mvh:*
>>>
>>> Mårten Swärd
>>>
>>> Systemutvecklare/Webbutvecklare, ITs
>>>
>>> SMHI, Sveriges Meteorologiska och Hydrologiska Institut
>>>
>>> Tel: +46 11 495 8469
>>>
>>>
>>>
>>>
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>>>
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