Palette support 1

server/dimension.go

@@ -0,0 +1,104 @@
+package server
+
+import (
+	"bytes"
+	"github.com/Tnze/go-mc/data/packetid"
+	pk "github.com/Tnze/go-mc/net/packet"
+	"github.com/Tnze/go-mc/save"
+	"io"
+	"sync"
+)
+
+type Dimension interface {
+	Info() DimInfo
+	PlayerJoin(p *Player)
+	PlayerQuit(p *Player)
+}
+
+type DimInfo struct {
+	Name       string
+	HashedSeed uint64
+}
+
+type SimpleDim struct {
+	Columns map[struct{ X, Z int }]*struct {
+		sync.Mutex
+	}
+}
+
+type chunkData struct {
+	HeightMaps save.BitStorage
+	BlockState save.BitStorage
+	Biomes     save.BitStorage
+}
+
+func (c *chunkData) WriteTo(w io.Writer) (int64, error) {
+	return pk.Tuple{
+		// Heightmaps
+		pk.NBT(struct {
+			MotionBlocking []uint64 `nbt:"MOTION_BLOCKING"`
+		}{c.HeightMaps.Longs()}),
+		pk.ByteArray(c.Data()), // TODO: Chunk Data
+		pk.VarInt(0),           // TODO: Block Entity
+	}.WriteTo(w)
+}
+
+func (c *chunkData) Data() []byte {
+	var buff bytes.Buffer
+	_, _ = pk.Short(0).WriteTo(&buff)
+	return buff.Bytes()
+}
+
+type lightData struct {
+	SkyLightMask   pk.BitSet
+	BlockLightMask pk.BitSet
+	SkyLight       []pk.ByteArray
+	BlockLight     []pk.ByteArray
+}
+
+func bitSetRev(set pk.BitSet) pk.BitSet {
+	rev := make(pk.BitSet, len(set))
+	for i := range rev {
+		rev[i] = ^set[i]
+	}
+	return rev
+}
+
+func (l *lightData) WriteTo(w io.Writer) (int64, error) {
+	return pk.Tuple{
+		pk.Boolean(true), // Trust Edges
+		l.SkyLightMask,
+		l.BlockLightMask,
+		bitSetRev(l.SkyLightMask),
+		bitSetRev(l.BlockLightMask),
+		pk.Array(l.SkyLight),
+		pk.Array(l.BlockLight),
+	}.WriteTo(w)
+}
+
+func (s *SimpleDim) PlayerJoin(p *Player) {
+	for pos, column := range s.Columns {
+		column.Lock()
+		packet := pk.Marshal(
+			packetid.ClientboundLevelChunkWithLight,
+			pk.Int(pos.X), pk.Int(pos.Z),
+			&chunkData{},
+			&lightData{
+				SkyLightMask:   make(pk.BitSet, (16*16*16-1)>>6+1),
+				BlockLightMask: make(pk.BitSet, (16*16*16-1)>>6+1),
+				SkyLight:       []pk.ByteArray{},
+				BlockLight:     []pk.ByteArray{},
+			},
+		)
+		column.Unlock()
+
+		err := p.WritePacket(Packet757(packet))
+		if err != nil {
+			return
+		}
+	}
+}
+
+func (s *SimpleDim) PlayerQuit(p *Player) {
+
+}