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ChHarding / TouchTerrain_for_CAGEO

Touch Terrain: A python app to create 3D printable terrain models (STL/OBJ) from only elevation data (via Google Earth Engine) or from a local geotiff. Has been used for CNC terrain models. Runs as a web app (http://touchterrain.org), as .py file (standalone.py) or as jupyter notebook. Docker image: https://github.com/ChHarding/TouchTerrain_jupyter_docker
http://touchterrain.geol.iastate.edu
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Applying Rotation to Selection #63

Closed keerl closed 1 year ago

keerl commented 1 year ago

Is it possible to apply a rotation to a selection? I am able to do this manually right now by creating a polygon (that is just a rotated rectangle), but the edges of the STL are all jagged when I do that (see attached image).

Any ideas on how I can get around this?

Screen Shot 2022-12-02 at 9 05 46 AM
ChHarding commented 1 year ago

Karl,

You’re getting these jaggies b/c the mesh is based on a raster/grid, so any non-orthogonal (perfectly east-west or north-south) border will look like this. Note that I’ve already incorporated code to make it smoother: http://blog.touchterrain.org/2020/11/whats-new-in-version-31.html

To get truly smooth side you will have to postprocess your STL with something like MeshMixer which has a clipping plane: [cid:94EBEAE1-45F3-4645-8C52-FAD8E6914614] [cid:CB5E7644-FFDF-4C46-85CD-2979143FE6F1]

If you need a really precise box (with perfect 90 degree angles) you can create a template box in Meshmixer and perform a boolean intersection: [cid:33DF2A70-1CC1-4356-BC0A-C0700FA368FA] [cid:BB41E224-2A85-4E5B-BBB4-BBAE7D799143]

On Dec 2, 2022, at 10:11, Karl Schmaltz @.**@.>> wrote:

Is it possible to apply a rotation to a selection? I am able to do this manually right now by creating a polygon (that is just a rotated rectangle), but the edges of the STL are all jagged when I do that (see attached image).

Any ideas on how I can get around this?

[Screen Shot 2022-12-02 at 9 05 46 AM]https://user-images.githubusercontent.com/24727492/205335706-f3bc02ed-83ce-4c76-a0cd-a58dea958227.png

— Reply to this email directly, view it on GitHubhttps://github.com/ChHarding/TouchTerrain_for_CAGEO/issues/63, or unsubscribehttps://github.com/notifications/unsubscribe-auth/AEYDF5JZ2B74UDTLOJG2SLTWLINR5ANCNFSM6AAAAAASSCGS5U. You are receiving this because you are subscribed to this thread.Message ID: @.***>

Chris Harding Associate Professor Department of Geological & Atmospheric Sciences Touchterrain.geol.iastate.eduhttp://Touchterrain.geol.iastate.edu

keerl commented 1 year ago

Thanks for the quick response! That makes perfect sense. Thank you.

ChHarding commented 1 year ago

You’re welcome! Can I ask you what you’re printing and what for? (Just curious …)

On Dec 2, 2022, at 12:08, Karl Schmaltz @.**@.>> wrote:

Thanks for the quick response! That makes perfect sense. Thank you.

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Chris Harding Associate Professor Department of Geological & Atmospheric Sciences Touchterrain.geol.iastate.eduhttp://Touchterrain.geol.iastate.edu

keerl commented 1 year ago

I want to CNC mill out a mountain range for an art project just for fun. The rotation comes into play because the mountain range goes at a diagonal and I'd like to have the mountains only and not the flat stuff around it. Before and after examples attached below.

Screen Shot 2022-12-02 at 11 25 49 AM Screen Shot 2022-12-02 at 11 26 14 AM
ChHarding commented 1 year ago

Oh cool! I’ve never done any CNC myself but I do know that about 20% of downloaders use TouchTerrain for this. Coincidently, the author of this: https://www.instructables.com/Carving-3D-Terrain-Topographic-Relief-Maps-on-a-CN/ just contacted me.

On Dec 2, 2022, at 12:28, Karl Schmaltz @.**@.>> wrote:

I want to CNC mill out a mountain range for an art project just for fun. The rotation comes into play because the mountain range goes at a diagonal and I'd like to have the mountains only and not the flat stuff around it. Before and after examples attached below.

[Screen Shot 2022-12-02 at 11 25 49 AM]https://user-images.githubusercontent.com/24727492/205360838-117c971f-d805-4f5a-b662-ea15fcc21612.png

[Screen Shot 2022-12-02 at 11 26 14 AM]https://user-images.githubusercontent.com/24727492/205360836-a24acb7c-6390-4f25-831d-03783f79e498.png

— Reply to this email directly, view it on GitHubhttps://github.com/ChHarding/TouchTerrain_for_CAGEO/issues/63#issuecomment-1335655634, or unsubscribehttps://github.com/notifications/unsubscribe-auth/AEYDF5LU3C5RWAXNLALUD3TWLI5THANCNFSM6AAAAAASSCGS5U. You are receiving this because you commented.Message ID: @.***>

Chris Harding Associate Professor Department of Geological & Atmospheric Sciences Touchterrain.geol.iastate.eduhttp://Touchterrain.geol.iastate.edu