dim manager test 1

server/dimension/loadmanager.go

@@ -0,0 +1,53 @@
+package dimension
+
+import (
+	"container/list"
+
+	"github.com/Tnze/go-mc/level"
+)
+
+type manager struct {
+	storage
+	elements     map[level.ChunkPos]*list.Element
+	activeChunks *list.List
+
+	chunkLoadQueue   []level.ChunkPos
+	chunkUnloadQueue []level.ChunkPos
+}
+
+type chunkHandler struct {
+	level.ChunkPos
+	*level.Chunk
+}
+
+func (m *manager) refresh(players [][2]int) {
+	m.chunkLoadQueue = m.chunkLoadQueue[:0]
+	m.chunkUnloadQueue = m.chunkUnloadQueue[:0]
+
+	newActives := list.New()
+	const N = 16
+	for _, p := range players {
+		for i := 1 - N; i < N; i++ {
+			for j := 1 - N; j < N; j++ {
+				pos := level.ChunkPos{
+					X: p[0] + i,
+					Z: p[1] + j,
+				}
+				if e := m.elements[pos]; e != nil {
+					// chunk exist, move into newActives
+					v := m.activeChunks.Remove(e)
+					m.elements[pos] = newActives.PushBack(v)
+				} else {
+					// not exist, load from storage
+					m.chunkLoadQueue = append(m.chunkLoadQueue, pos)
+				}
+			}
+		}
+	}
+	for e := m.activeChunks.Front(); e != nil; e = e.Next() {
+		pos := e.Value.(chunkHandler).ChunkPos
+		m.chunkUnloadQueue = append(m.chunkUnloadQueue, pos)
+		m.elements[pos] = newActives.PushBack(e.Value)
+	}
+	m.activeChunks = newActives
+}

server/dimension/pool.go

@@ -0,0 +1,74 @@
+package dimension
+
+import (
+	"fmt"
+	"path/filepath"
+
+	"github.com/Tnze/go-mc/level"
+	"github.com/Tnze/go-mc/save"
+	"github.com/Tnze/go-mc/save/region"
+)
+
+// TODO: Cache regions and chunks
+type storage struct {
+	regionDir string
+}
+
+func (s *storage) GetChunk(pos level.ChunkPos) (lc *level.Chunk, err error) {
+	filename := fmt.Sprintf("r.%d.%d.mca", pos.X>>5, pos.Z>>5)
+
+	var r *region.Region
+	r, err = region.Open(filepath.Join(s.regionDir, filename))
+	if err != nil {
+		return nil, err
+	}
+	defer func() {
+		err2 := r.Close()
+		if err == nil && err2 != nil {
+			err = err2
+		}
+	}()
+
+	sector, err := r.ReadSector(region.In(pos.X, pos.Z))
+	if err != nil {
+		return nil, err
+	}
+
+	var sc save.Chunk
+	err = sc.Load(sector)
+	if err != nil {
+		return nil, err
+	}
+
+	return level.ChunkFromSave(&sc)
+}
+
+func (s *storage) PutChunk(pos level.ChunkPos, c *level.Chunk) (err error) {
+	var sc save.Chunk
+	err = level.ChunkToSave(c, &sc)
+	if err != nil {
+		return
+	}
+
+	var data []byte
+	data, err = sc.Data(1)
+	if err != nil {
+		return
+	}
+
+	filename := fmt.Sprintf("r.%d.%d.mca", pos.X>>5, pos.Z>>5)
+	var r *region.Region
+	r, err = region.Open(filepath.Join(s.regionDir, filename))
+	if err != nil {
+		return err
+	}
+	defer func() {
+		err2 := r.Close()
+		if err == nil && err2 != nil {
+			err = err2
+		}
+	}()
+	x, z := region.In(pos.X, pos.Z)
+	err = r.WriteSector(x, z, data)
+	return
+}