Get color of position on sphere | Bevy | Page 1

vapid umbra Jun 21, 2023, 7:16 PM

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Hello, I'm curious to know how one could determine the color of a specific location on a 3D sphere using the mouse's position.

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I guess that I need the texture coordinate (UV) and then determine the color of the position from the texture

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But I cant find a way to get the color form a UV

noble yoke Jun 21, 2023, 7:56 PM

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If you have an Image for the Texture you should be able to decode pixel values from the Image.data field.

eager nebula Jun 22, 2023, 9:23 AM

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How would you get the texture coordinate?

vapid umbra Jun 22, 2023, 9:31 AM

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That is what I'm trying to figure out.
Its a uvsphere at 0.0, 0.0, 0.0 with a radius of 1. Using bevy_mod_racast I know the position of the mouse on the sphere.
I need to somehow translate the global raycast poition to the texture coordinate

eager nebula Jun 22, 2023, 9:33 AM

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I think it would be possible to use a shader for this. A post processing shader that also updates a storage buffer. Though I'm not quite clear on the details needed to make it work.

#Get color of position on sphere