start adding azalea-world

3 files changed, 54 insertions, 0 deletions

diff --git a/azalea-world/Cargo.toml b/azalea-world/Cargo.toml
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+[package]
+name = "azalea-world"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
diff --git a/azalea-world/README.md b/azalea-world/README.md
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+# Azalea World
+
+The Minecraft world representation used in Azalea.
diff --git a/azalea-world/src/lib.rs b/azalea-world/src/lib.rs
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+++ b/azalea-world/src/lib.rs
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+#[cfg(test)]
+mod tests {
+    #[test]
+    fn it_works() {
+        let result = 2 + 2;
+        assert_eq!(result, 4);
+    }
+}
+
+pub struct Chunk {
+    sections: Vec<Section>,
+}
+
+pub struct Section {
+    states: PalettedContainer,
+    biomes: PalettedContainer,
+}
+
+pub struct PalettedContainer {
+    bits_per_entry: u8,
+    palette: Palette,
+    /// Compacted list of indices pointing to entry IDs in the Palette.
+    data: Vec<i64>,
+}
+
+pub enum Palette {
+    /// ID of the corresponding entry in its global palette
+    SingleValue(u32),
+    LinearPalette(Vec<u32>),
+    HashmapPalette(Vec<u32>),
+    GlobalPalette,
+}
+
+impl Palette {
+    fn choose_palette_for_states(bits_per_entry: u8) -> &'static Palette {
+        match bits_per_entry {
+            0 => &Palette::SingleValue,
+            1..=4 => &Palette::LinearPalette,
+            5..=8 => &Palette::HashmapPalette,
+            _ => &Palette::GlobalPalette,
+        }
+    }
+}