Thx for your answers guys.
@bart I didn't know about LabelGun, interesting lib. Could be helpful for
HTML labelling but we are focus on canvas/WebGL labelling. I guess it
could be the same approach.
@fred and @andreas .
It seems easy when you describe it :) but does it fit all the usecase ? :
- Canvas/WebGL
- VectorTile using ol.render.Feature
- Same approach with text along path?
We would like to achieve this stuff with OL:
- Display text along path (https://www.mapbox.com/blog/placing-labels/)
- Labelling collision detection with horizontal or curved text
- Both canvas/WebGL
We are may be able to funding this devs depending of costs and timing
obviously.
Have boundless or camptocamp any interests in it? if yes could you send me
in private an estimation of for these tasks?
Tell me if you need more informations.
Thanks in advance.
Am Montag, 3. April 2017 20:59:26 UTC+2 schrieb Andreas Hocevar:
>
> @Fred, for vector layers it is indeed as straightforward as you described.
> It gets more interesting with vector tile layers, where tiles do not know
> about each other. That would need to change - label points would need to be
> collected for the whole viewport, so a label engine can make decisions for
> the whole visible map.
>
> Andreas.
>
> On Mon, Apr 3, 2017 at 4:04 PM, Frédéric Junod via OpenLayers Dev <
> openlayers-dev+apn2wqfjdcwggszdyt_yyqt9eygxji54p9e8aioqmtzfhq...@googlegroups.com
>
> <javascript:>> wrote:
>
>> Hello Oliver,
>>
>> I think it wouldn't be hard to implement this in OpenLayers:
>> - add a rbush in ol.render.canvas.Replay
>> - compute the text bounding box
>> (in ol.render.canvas.Replay.prototype.replay_)
>> - if this bounding box collides an other item; don't draw the text.
>> - otherwise draw the text and add the bounding box in the rbush.
>>
>> Do I miss something ?
>>
>> Regards,
>>
>> fredj
>>
>> On Monday, April 3, 2017 at 2:57:00 PM UTC+2, Bart van den Eijnden wrote:
>>>
>>> Hey Olivier,
>>>
>>> are you aware of Labelgun already?
>>>
>>> https://github.com/Geovation/labelgun
>>>
>>> Best regards,
>>>
>>> Bart
>>> On 03-04-17 13:42, Olivier Terral via OpenLayers Dev wrote:
>>>
>>> Hi all,
>>>
>>>
>>> We are currently, at swisstopo, investigating how could we improve the
>>> display of labels with vector tiles.
>>> One of the best feature of competitor like MapboxGLJS or TangramJS is
>>> the label collision detection [1] .
>>>
>>>
>>> Does it something we could implement in OL ?
>>>
>>> We would be glad to have your opinion about this.
>>>
>>>
>>>
>>> [1]https://www.mapbox.com/blog/label-collisions/
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>>>
>>> --
>>> Bart van den Eijnden
>>> JavaScript developer | Boundless
>>> [email protected]
>>>
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