How to polygonize points in roof ?

[derekcbr]

Is it possible to polygonize different points in the roof by this algorithm? As a roof consists of different polygons.

[aegis1980]

Hey. Not sure I quite understand, but don't think so. This code just converts 2D CAD files (dxf,dwg) to Shapely geometry. Shapely a Python library. Your problem sounds more a 3d modeling problem? If you send me snapshot image might be able to point in right direction ;) that sort of thing is more my day job with coding after hours. Ha.

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On Thu, 11 Mar 2021, 2:39 am derekcbr, ***@***.***> wrote: Is it possible to polygonize different points in the roof by this algorithm? As a roof consists of different polygons. — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#1>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ABAWEPAMW2XNTIKVHVBITIDTC5SBFANCNFSM4Y6BIP6Q> .

[derekcbr]

Thanks! Please have a look at the roof picture.

[aegis1980]

your u/l image didnt work...

[derekcbr]

Please check again!

[aegis1980]

What r you trying to do? Make a 3d model of roof, ie create sloped surfaces? You'll need some height/slope info to do that. Or just define closed 2d polygons for each facet of roof? Is that image you sent a screenshot of a dwg/vector file? Or a raster one (jpeg etc?)

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On Thu, 11 Mar 2021, 4:51 pm derekcbr, ***@***.***> wrote: Please check again! [image: roof001] <https://user-images.githubusercontent.com/31892214/110732951-13777800-8260-11eb-889b-3db3b4f3681d.jpg> — You are receiving this because you commented. Reply to this email directly, view it on GitHub <#1 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ABAWEPBKDJVNSNHOVOBI3GDTDA44LANCNFSM4Y6BIP6Q> .

[derekcbr]

I am trying to calculate the roofing areas by each polygons based on the slope already know. It is from dwg file.

[aegis1980]

for this specific geometry (ie a one-off) or more broadly? specific: easyish. use AutoCAD, Rhino, Sketchup ++ whatever (gimme the file, I can do it). What format for you need for? Alternatively, the person/architect who created the original file has te 3d info so ask her to send it. more broadly (as a bit code): tough, beyond my sphere of interest....but solvable! Good luck!! Jon

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On Thu, 11 Mar 2021 at 18:36, derekcbr ***@***.***> wrote: I am trying to calculate the roofing areas by each polygons based on the slope already know. It is from dwg file. [image: roof002] <https://user-images.githubusercontent.com/31892214/110740588-458fd680-826e-11eb-8a9e-145c602dde6e.jpg> — You are receiving this because you commented. Reply to this email directly, view it on GitHub <#1 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ABAWEPFUVQXYWESNDTS74PLTDBJFBANCNFSM4Y6BIP6Q> .

[derekcbr]

Thanks! I was inspired by your project and then I use shapely.ops.polygonize(rooflines) but it only four polygons and others are invalids.geoms. The architect does not have 3D format as it is only in quoting phase.

[aegis1980]

Sweet. Glad you've sorted it 😉 Sorry if my messages may've come across a little back-to-basics. Wasn't 100% sure what experience etc u had. Jon

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On Thu, 11 Mar 2021, 8:00 pm derekcbr, ***@***.***> wrote: Thanks! I was inspired by your project and then I use shapely.ops.polygonize(rooflines) but it only four polygons and others are invalids.geoms. The architect does not have 3D format as it is only in quoting phase. — You are receiving this because you commented. Reply to this email directly, view it on GitHub <#1 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ABAWEPE4U7KTIA5ZDPNSSK3TDBTBXANCNFSM4Y6BIP6Q> .

[derekcbr]

Thank you for the help!