Unfolding the tower 3D model

[Packy_GIS]

Hi to all.
I have a 3D model of an old castle tower (100% cylinder). I would like to unfold the tower (the orthophoto) into the plane. How should I do it, or which external software to use??
Thanks a lot.
Packy

[Artisan S]

I use Blender (being Dutch and goin Dutch :-)) for that: Just build a cilinder inside your tower.....then unwrap it (as a cilider right) and transfer the texture from the former to the latter.

https://www.youtube.com/watch?v=UlQ2TC0uZM8

It's a bit tricky but it usually works.......

Greets, Ed.

[chrisd]

A function that can do this was recently improved/added in CloudCompare
http://www.danielgm.net/cc/forum/viewtopic.php?t=1417

[toxicmag]

Hello Chris,

as far as i can see the unfolding in CloudCompare is only for the pointcloud itself - not for the orthophoto as requested by packy_GIS.

Am i wrong, or is there any new solution by now, since i also have to "unwrap" a cylindrical orthophoto from a bend ceiling.

Greetings.
Alex

[chrisd]

I'm not using the Pro version, so I don't have specific experience with orthophotos.

Hopefully someone else can answer.

[JMR]

Meshlab does. Its a bit tricky but works. As far as I remember It requires the tower to be centered in the coordinate system origin, it can be translated inside Meshlab but I'd recommend to set a local reference system for your GCP's and export a textured mesh. Once that you have the cylinder (mesh) developed, you just need to export an ortho.
By the way, even if this "orthos" might have interesting applications, unwrapped architectural objects look disgusting.
Best,
GEOBIT

[Packy_GIS]

Hi ... I finally got to check on the MeshLab ... but I couldn't figure out how to unfold the mesh ... has anyone any idea?
Thanks
Jan

[wyk]

Hello
Anybody has a solution to unfold cilindrical texture into 2D?
BR

[karad]

hi,
use cloudcompare  see the instruction on the documentation

good luck

[SAV]

Hi Packy_GIS,

Use CloudCompare's UNROLL feature to unroll the dense point cloud. Then generate a raster from it (also in CloudCompare).

Step 1
UNROLL dense point cloud: http://www.cloudcompare.org/doc/wiki/index.php?title=Unroll

Step 2
Generate RGB RASTER: http://www.cloudcompare.org/doc/wiki/index.php?title=Rasterize
Use RGB as active layer. DONE.

Note that the resolution of your final raster depends on the resolution/GSD of your dense point cloud (and on the settings chosen in CloudCompare).

Regards,
SAV

[wyk]

Thank you !
It is ok to unroll the dense point cloud and then build a mesh

but is it possible to apply textures or orthophotos  to the unrolled mesh ?