storage=?????

level/chunk.go

@@ -0,0 +1,54 @@
+package level
+
+import (
+	"encoding/binary"
+	"io"
+	"math"
+
+	"github.com/admin-else/strom/data"
+	"github.com/admin-else/strom/util"
+)
+
+type BlockState struct {
+	Id         string
+	Properties map[string]string
+}
+
+const (
+	ChunkWidth            = 16
+	ChunkColumns          = ChunkWidth * ChunkWidth
+	BlocksPerChunkSection = ChunkWidth * ChunkWidth * ChunkWidth
+	ChunkBiomesWidth      = 4
+	BiomesPerChunkSection = ChunkBiomesWidth * ChunkBiomesWidth * ChunkBiomesWidth
+)
+
+type Section struct {
+	Blocks *Storage[*BlockState]
+	Biomes *Storage[string]
+}
+
+func PossibleBpesBlocks(version string) (ret []uint8) {
+	maxBpe := util.BpeByNum(float64(len(data.BlocksForVersion(version))))
+	ret = []uint8{0, 4, 5, 6, 7, 8, maxBpe}
+	return
+}
+
+func PossibleBpesBiomes(version string) (ret []uint8) {
+	maxBpe := uint8(math.Ceil(math.Log2(float64(len(data.BiomesForVersion(version))))))
+	ret = []uint8{0, 1, 2, 3, maxBpe}
+	return
+}
+
+func SectionFromPacket(r io.Reader, version string) (s *Section, err error) {
+	s = &Section{}
+	s.Blocks = NewStorage[*BlockState](BlocksPerChunkSection, PossibleBpesBlocks(version))
+	s.Biomes = NewStorage[string](BiomesPerChunkSection, PossibleBpesBiomes(version))
+
+	var bitsPerEntryBlocks uint8
+	err = binary.Read(r, binary.BigEndian, &bitsPerEntryBlocks)
+	if err != nil {
+		return
+	}
+
+	return
+}