fatuhoku / haskell-minecraft-tool Goto Github PK

The alpha channel of PNG files should be heeded; transparent pixels (with alpha value = 0) should simply be omitted and the cell in its place should be set to Air.

We're looking for something to the tune of

quantize :: Color -> WoolColour 

Ensure that given any colour, we can efficiently map it onto the nearest Wool colour.

Further, we want a function that would convert a PNG image into an array of wool colours.

quantizeImage :: FilePath -> IO (Array BlockCoords WoolColour)

Currently, exitcode-stdio style is used to do tests. Only a single test exists, which tests
whether or not the loadRegion and saveRegion functions (decode . encode) round trip preserves identity.

Testing should be a little more flexible for the future, looking towards using SmallCheck to check all small regions for this property.

The neat thing about Binary is that tests can be done with ByteStrings and the Get and Put monads without the need for IO. Sweet.

The downside is that the test data lives in the project repository.

If the application loads and saves a region file, currently, the loading process will ensure that all chunks are read fully (are forced), and the NBT data will be decompressed. However, since the use case for this program is just to modify a small number of chunks across different region files, the forcing of decompression of chunks is not desirable.

Consider declaring

Chunk = Chunk { chunkCompressedNbt :: ByteString, chunkTimestamp :: Timestamp }

and require the programmer to decompress the NBT before getting to the contents!

This issue covers the writing of the application that changes a region rather than just a test.

oneBlock :: <<parameters>> -> NBT -> NBT

... that would put a white wool block on top of the player's head in the chunk he's standing in.

Problems

I've been running the test but it doesn't seem to modify the world in the way that I would like. The wool block does not appear.

To debug this, write a test that would execute the region modification function (putting wool block on player head) on a standard region does actually modify the Region (the wool block is observable).
If this is the case, then we can be almost certain that Minecraft will see this change, thanks to decEnc.

Complete Region serialization!

Make it so that Regions can be serialised to ByteStrings. This should be done by using the Put Monad.