How to make a Tovel like cube (edge smooth?)

Question

Hi, i'm trying make a voxel game.

and i'm no idea on how to make a cube like this one

Trove

what i do now is create a cube in scene and change the color, but how could i make the cube look like more smooth?

also like the second image, you can see the tree (purple part) is made by 3 cube,

so if i made a cube prefab which have a smooth edge( in mesh) , when i use that cube to build the tree , there should be some groove between each cube .

apparently that's not right.

so any idea how to do it?

thanks

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Answer 1

Answer by peter226 · Mar 19, 2019 at 06:31 PM

You could calculate smooth normals for the mesh, but input them as vertex colors, and use a gradient to shift between that and the original normals. Or another way is to create a normal atlas texture with all possible normal combinations based on neighbour cubes for faces, and make a script figure out which part of it to use and input it as uv, but this I don't recommend, simply for it's complexity.

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Answer 2

Answer by Danixadem · Aug 28, 2020 at 10:58 PM

"Or another way is to create a normal atlas texture with all possible normal combinations based on neighbour cubes for faces, and make a script figure out which part of it to use and input it as uv" That is what I'm trying to do for my own project. But I must ask if it is any different than entering UV coordinates for albedo texture. Because built-in materials does not provide any sprite-sheet functionality for normal maps.,"Or another way is to create a normal atlas texture with all possible normal combinations based on neighbour cubes for faces, and make a script figure out which part of it to use and input it as uv" that's what exactly I need to achieve for my project. Any ideas how to do that?

@peter226

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peter226 · Aug 29, 2020 at 01:21 PM 0

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It's the same as normal UV mapping, just use the second UV buffer if you also need textures, and keep in $$anonymous$$d that if you use filtering on your atlas texture you need to give each texture part a larger area (safezone) to avoid different parts blending together / bleeding into eachother. I'm not sure how to select the proper UV and also do it fast. You could look up the 16 cube "solidity" states surrounding the current mesh face, store them in a "short" value and use it as an index in an array, but this seems a bit slow to me, you could try to implement this and make it BurstCompile-able to get some usable results.

How to make a Tovel like cube (edge smooth?)

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