optionally provide more versatile tile-map functionality

mattdm commented 9 months ago

I see in https://github.com/ethereumdegen/bevy_mesh_terrain/blob/85eccf1767b75af17abb8f2c4fd50ce6def526a3/assets/shaders/terrain.wgsl#L4 the link to bevy_terrain's advanced shader, which uses a function to find the individual tile texture. The RGBA hack this plugin uses currently is very clever, but it'd be nice to have some more versatile options:

N-bit grayscale image indicating tile number in a larger atlas
N-bit RGBA but use R and B for tile number and G and A for alpha respectively
Multiple ordered layers, with alpha channel the tiles in the atlas in "higher" layers (so the lower ones show through)
For any of the above, plus the current RGBA blend approach, a seeded randomization (to pick, say, one of 16 variant grass tiles).
automatic selection of edge/corner transition tiles
load tiled-format maps (as bevy_tiled can in 2D (example: https://github.com/StarArawn/bevy_ecs_tilemap/blob/main/examples/tiled.rs)

What do you think?

mattdm commented 9 months ago

If you're interested, this looks like something I could experiment with....

mattdm commented 9 months ago

Oh, here's another one, keeping the "splat map" idea: 5 tile options, with the fifth an implied "background layer". That is, 1-(R+B+G+A).

ethereumdegen commented 5 months ago

I experimented with this and figured out how to support 255 textures ! check it out and let me know what you think .

mattdm commented 4 months ago

Cool — I've been busy with other things but will look when I get a chance.

ethereumdegen / bevy_mesh_terrain