projectiles should have their own ID

projectile.go

@@ -8,7 +8,7 @@ type Projectile struct {
 	Id       string    `json:"id"`
 	Position v.Point2d `json:"position"`
 	MoveTo   v.Point2d `json:"-"`
-	Radius   int       `json:"radius"`
+	Radius   int       `json:"-"`
 	Speed    float32   `json:"-"`
 	Damage   int       `json:"-"`
 	Owner    *player   `json:"-"`
@@ -22,7 +22,7 @@ func (p *Projectile) Tick(g *game) {
 
 	hit_player := false
 	for player := range g.players {
-		if player.Robot.Id == p.Id {
+		if player == p.Owner {
 			continue
 		}
 		dist := v.Distance(player.Robot.Position, p.Position)