func (a *avatar) control(ctrl <-chan Msg, input <-chan *protocol.Message) {
for {
select {
case msg := <-ctrl:
switch m := msg.(type) {
// TODO: Handle MsgTick?
case MsgQuit:
a.player.Chan <- MsgSetState{Remove{true}}
a.svc.Game <- MsgEntityRemoved{&a.player}
return
}
case msg := <-input:
switch *msg.Type {
case protocol.Message_Type(protocol.Message_MOVE):
dir := msg.Move.Direction
vec := s3dm.NewV3(*dir.X, *dir.Y, *dir.Z)
a.player.Chan <- MsgRunAction{Move{vec}, false}
default:
log.Println("Client sent unhandled message, ignoring:",
protocol.Message_Type_name[int32(*msg.Type)])
}
}
}
}
func (w *World) spawnSpiders(pos *s3dm.V3) {
// Represents the gradually increasing difficulty as the player gets
// farther from the center of Spider Forest. Every time the player
// passes this threshold, another spider will definitely spawn upon
// player movement. So if the player is 173 units from the center,
// 173/50=3 spiders will spawn with a 23/50 chance to make it 4.
// The lower this number, the more difficult the game will be.
const LEVEL_DIST = 100.
// Minimum and maximum distance from the player to spawn spiders
const MIN_DIST = 40.
const MAX_DIST = 60.
// Find how many spiders will definitely spawn
dist := pos.Length()
count := 0
for dist >= LEVEL_DIST {
dist -= LEVEL_DIST
count++
}
// Random chance for a spider to spawn
if rand.Float64() <= dist/LEVEL_DIST {
count++
}
// Spawn spiders at a random point in a ring around the player
// between MIN_DIST and MAX_DIST.
reply := make(chan Msg)
for i := 0; i < count; i++ {
radius := rand.Float64()*(MAX_DIST-MIN_DIST) + MIN_DIST
angle := rand.Float64() * 2. * math.Pi
x := pos.X + radius*math.Cos(angle)
y := pos.Y + radius*math.Sin(angle)
// Create the spider entity and position it
Send(w, w.svc.Game, game.MsgSpawnEntity{InitSpider, reply})
spider := Recv(w, reply).(*EntityDesc)
Send(w, spider.Chan, MsgSetState{Position{s3dm.NewV3(x, y, 0.)}})
}
}