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Finding visible faces in mesh

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deadalvs
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Hi,

If I have a mesh, e.g. two intersecting tori ('toruses'):

For a given direction how can I find all faces that are visible?


Any input welcome!
Thanks,
Matt
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deadalvs
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to add:

the actual problem I'd like to solve is which polygons of a mesh can be seen from any point between horizon and sky (northern hemisphere of the sky).
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mestela
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Here's a way a co-worker showed me last week; project uvs from the camera, and do what you need based on that. uvs less than 0 or greater than 1 aren't in the view.

Attachments:
highlight_by_camera_uv.hipnc (217.9 KB)

http://www.tokeru.com/cgwiki [www.tokeru.com]
https://www.patreon.com/mattestela [www.patreon.com]
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deadalvs
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Very cool.

I'll have a look at this asap!

Thanks !!

Matt
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