up3

server/session/handler_sub_chunk_request.go

@@ -0,0 +1,28 @@
+package session
+
+import (
+	"github.com/df-mc/dragonfly/server/world"
+	"github.com/sandertv/gophertunnel/minecraft/protocol"
+	"github.com/sandertv/gophertunnel/minecraft/protocol/packet"
+)
+
+// SubChunkRequestHandler handles sub-chunk requests from the client. The server will respond with a packet containing
+// the requested sub-chunks.
+type SubChunkRequestHandler struct{}
+
+// Handle ...
+func (*SubChunkRequestHandler) Handle(p packet.Packet, s *Session, tx *world.Tx, _ Controllable) error {
+	pk := p.(*packet.SubChunkRequest)
+	if dimID, _ := world.DimensionID(tx.World().Dimension()); pk.Dimension != int32(dimID) {
+		// Outdated sub chunk request from a previous dimension.
+		s.writePacket(&packet.SubChunk{
+			Dimension:       pk.Dimension,
+			Position:        pk.Position,
+			CacheEnabled:    s.conn.ClientCacheEnabled(),
+			SubChunkEntries: []protocol.SubChunkEntry{},
+		})
+		return nil
+	}
+	s.ViewSubChunks(world.SubChunkPos(pk.Position), pk.Offsets, tx)
+	return nil
+}