remove collectible if bumped into it

game/levels.go

@@ -65,6 +65,8 @@ func NewLevel(game *Game, cellsize int, plan *assets.RawLevel) *Level {
 func (level *Level) Update() {
 	query := level.World.Query(level.Selector["player"])
 
+	toRemove := []ecs.Entity{}
+
 	for query.Next() {
 		playerposition := (*components.Position)(query.Get(level.Component["position"]))
 		velocity := (*components.Velocity)(query.Get(level.Component["velocity"]))
@@ -111,12 +113,19 @@ func (level *Level) Update() {
 				ok, _ := playerposition.Intersects(colposition, velocity)
 				if ok {
 					fmt.Printf("bumped into collectible %v\n", collectible)
+					toRemove = append(toRemove, colquery.Entity())
 				}
 			}
 		}
 
 		playerposition.Move(velocity)
 	}
+
+	for _, entity := range toRemove {
+		// FIXME: or keep them and prepare an animated death
+		level.World.RemoveEntity(entity)
+	}
+
 }
 
 func (level *Level) Position2Point(position *components.Position) image.Point {