Forums Technical Discussion Creating lowres cut out of texture / or 2d concave hull

Creating lowres cut out of texture / or 2d concave hull

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hektor
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Hey guys,

I've stuck and bit and need o to borrow your brain.

Have a 2D texture:


And I want to create low res cut out of it:


Unfortunately, trace sop gives me very high res results. When I increase step size, the edges of the outline will start going through texture. The same resampling of trace sop wouldn't give me results like in the picture. Basically, I want to create a 2d concave hull around that texture.

Any guidance?

Attachments:
cutout_of_texture_01.png (27.2 KB)
cutout_of_texture_02.png (30.3 KB)

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Benjamin Lemoine
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Hello ,
I think you could use a refine node , set it to unrefine , from u 0 to 1 , play with the threshold
then maybe a polyexpand 2D…
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Konstantin Magnus
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Resample and polyexpand2d for me.

Attachments:
cutout.jpg (11.3 KB)
cut_out.hipnc (78.2 KB)

https://procegen.konstantinmagnus.de/ [procegen.konstantinmagnus.de]
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Benjamin Lemoine
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after making some test , in fact resample first , polyexpand then unrefine give something really close to your shape
Edited by Benjamin Lemoine - Nov. 22, 2020 07:11:57

Attachments:
SharedScreenshot.jpg (143.4 KB)

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hektor
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Thanks Benjamin and Konstantin. It works perfectly! Really cool!
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