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Update to voxel-texture v0.5.0 which uses texture atlases. Bump v0.17.0. #69

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merged 1 commit into from Apr 15, 2013

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shama
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@shama shama commented Apr 15, 2013

Updates to support voxel-texture v0.5.0 which now loads everything onto a texture atlas and sets UV mappings.

Increases performance roughly by 10 fold. voxel-texture has just about been re-written and is not backwards compatible so I've bumped voxel engine a minor version.

Previously this scene with chunkDistance: 6 never would run above 7fps on my macbook but now runs around 30fps :D
screen_2013-04-15

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amazing

max-mapper added a commit that referenced this pull request Apr 15, 2013
Update to voxel-texture v0.5.0 which uses texture atlases. Bump v0.17.0.
@max-mapper max-mapper merged commit 7f9788d into max-mapper:master Apr 15, 2013
@shama shama deleted the textureatlas branch April 15, 2013 23:56
deathcap added a commit to deathcap/voxel-engine that referenced this pull request Dec 3, 2013
voxel-texture 0.5.0 switched to use texture atlases, packing all the block
textures into one graphic for efficiency purposes. However, this introduces
two problems:

- With the culled mesher (default as of voxel-engine 0.17+), I get serious lag
spikes (30-60 ms frames, or unplayably higher) when placing/breaking blocks, and also slow
page load as the meshes are built (see max-mapperGH-10).

- With the greedy mesher, performance is much better (fixes max-mapperGH-10) but textures are stretched
across each of the greedily constructed meshes, instead of tiled across each block (see max-mapperGH-14).
Example: https://f.cloud.github.com/assets/5897956/1651233/1f478c9e-5aca-11e3-82cc-4028f1e1b1da.png

There are techniques for texturing greedy meshes, detailed in this article:

http://0fps.wordpress.com/2013/07/09/texture-atlases-wrapping-and-mip-mapping/

- Using array textures is ideal, but they won't be supported until WebGL 2.0 at earliest
https://www.khronos.org/registry/webgl/specs/latest/2.0/#3.7

- Otherwise, they can be tiled manually, but this requires a few tricks, would certainly
be worthwhile to implement, but is fairly complex. Maybe later, once I understand it better.

So for now, (unfortunately) I've reverted back to voxel-texture without atlases. This keeps
mesh recalculation fast (when breaking/placing blocks) and avoids stretched textures but
may slow down complex scenes with many materials (see performance improvement @shama noted in max-mapper#69).
deathcap added a commit to deathcap/voxel-engine that referenced this pull request Dec 3, 2013
voxel-texture 0.5.0 switched to use texture atlases, packing all the block
textures into one graphic for efficiency purposes. However, this introduces
two problems:

- With the culled mesher (default as of voxel-engine 0.17+), I get serious lag
spikes (30-60 ms frames, or unplayably higher) when placing/breaking blocks, and also slow
page load as the meshes are built (see voxel/voxelmetaverse#10)

- With the greedy mesher, performance is much better (fixes first issue) but textures are stretched
across each of the greedily constructed meshes, instead of tiled across each block (see voxel/voxelmetaverse#14)
Example: https://f.cloud.github.com/assets/5897956/1651233/1f478c9e-5aca-11e3-82cc-4028f1e1b1da.png

There are techniques for texturing greedy meshes, detailed in this article:

http://0fps.wordpress.com/2013/07/09/texture-atlases-wrapping-and-mip-mapping/

- Using array textures is ideal, but they won't be supported until WebGL 2.0 at earliest
https://www.khronos.org/registry/webgl/specs/latest/2.0/#3.7

- Otherwise, they can be tiled manually, but this requires a few tricks, would certainly
be worthwhile to implement, but is fairly complex. Maybe later, once I understand it better.

So for now, (unfortunately) I've reverted back to voxel-texture without atlases. This keeps
mesh recalculation fast (when breaking/placing blocks) and avoids stretched textures but
may slow down complex scenes with many materials (see performance improvement @shama noted in max-mapper#69).
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