gopenfusion/shard/chunks.go

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package shard
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import (
"github.com/CPunch/gopenfusion/core/entity"
)
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func (server *ShardServer) addEntity(e entity.Entity) {
pos := e.GetChunk()
server.addEntityToChunks(server.getViewableChunks(pos), e)
server.getChunk(pos).AddEntity(e)
}
func (server *ShardServer) removeEntity(e entity.Entity) {
pos := e.GetChunk()
server.removeEntityFromChunks(server.getViewableChunks(pos), e)
server.getChunk(pos).RemoveEntity(e)
}
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func (server *ShardServer) getChunk(pos entity.ChunkPosition) *entity.Chunk {
chunk, ok := server.chunks[pos]
if !ok {
chunk = entity.NewChunk(pos)
server.chunks[pos] = chunk
}
return chunk
}
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func (server *ShardServer) getViewableChunks(pos entity.ChunkPosition) []*entity.Chunk {
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chunks := make([]*entity.Chunk, 0, 9)
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for _, pos := range server.getChunk(pos).GetAdjacentPositions() {
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chunks = append(chunks, server.getChunk(pos))
}
return chunks
}
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// sends a packet to all peers in the given chunks, excluding the given peer
func (server *ShardServer) sendOthersPacket(plr *entity.Player, typeID uint32, pkt ...interface{}) error {
chunks := server.getViewableChunks(plr.Chunk)
for _, chunk := range chunks {
chunk.SendPacketExclude(plr, typeID, pkt...)
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}
return nil
}
func (server *ShardServer) removeEntityFromChunks(chunks []*entity.Chunk, this entity.Entity) {
for _, chunk := range chunks {
for e := range chunk.Entities {
if e == this {
continue
}
// notify other players we're leaving
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if e.GetKind() == entity.ENTITY_KIND_PLAYER {
otherPlr := e.(*entity.Player)
this.DisappearFromViewOf(otherPlr.Peer)
}
// notify us they're leaving
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if this.GetKind() == entity.ENTITY_KIND_PLAYER {
thisPlr := this.(*entity.Player)
e.DisappearFromViewOf(thisPlr.Peer)
}
}
}
}
func (server *ShardServer) addEntityToChunks(chunks []*entity.Chunk, this entity.Entity) {
for _, chunk := range chunks {
for e := range chunk.Entities {
if e == this {
continue
}
// notify other players we're entering
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if e.GetKind() == entity.ENTITY_KIND_PLAYER {
otherPlr := e.(*entity.Player)
this.EnterIntoViewOf(otherPlr.Peer)
}
// notify us they're entering
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if this.GetKind() == entity.ENTITY_KIND_PLAYER {
thisPlr := this.(*entity.Player)
e.EnterIntoViewOf(thisPlr.Peer)
}
}
}
}
func (server *ShardServer) updateEntityChunk(e entity.Entity, from entity.ChunkPosition, to entity.ChunkPosition) {
// no change needed
if from == to {
return
}
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oldViewables := server.getViewableChunks(from)
newViewables := server.getViewableChunks(to)
// compute differences
toExit := entity.ChunkSliceDifference(oldViewables, newViewables)
toEnter := entity.ChunkSliceDifference(newViewables, oldViewables)
// update chunks
server.removeEntityFromChunks(toExit, e)
server.addEntityToChunks(toEnter, e)
server.getChunk(from).RemoveEntity(e)
server.getChunk(to).AddEntity(e)
e.SetChunk(to)
}