Added teams so enemies don't attack each other.

resources/yaml/enemy.yaml

@@ -5,3 +5,4 @@ health: 100
 speed: 100.0
 radius: 25.0
 weapon: weapon.yaml
+faction: 1

resources/yaml/player.yaml

@@ -5,3 +5,4 @@ health: 100
 speed: 100.0
 radius: 25.0
 weapon: weapon.yaml
+faction: 0

source/abstract/Character.cpp

@@ -32,7 +32,8 @@ Character::Character(const sf::Vector2f& position, Category category,
 		mMovementSpeed(config.get(YAML_KEY::SPEED, YAML_DEFAULT::SPEED)),
 		mWeapon(new Weapon(world, *this,
 				Yaml(config.get(YAML_KEY::WEAPON, YAML_DEFAULT::WEAPON)))),
-		mLastPosition(getPosition()) {
+		mLastPosition(getPosition()),
+		mFaction((Faction) config.get(YAML_KEY::FACTION, YAML_DEFAULT::FACTION)) {
 }
 
 Character::~Character() {
@@ -66,6 +67,14 @@ Character::onThink(int elapsed) {
 	move();
 }
 
+/**
+ * Returns the faction this character belongs to.
+ */
+Character::Faction
+Character::getFaction() const {
+	return mFaction;
+}
+
 /**
  * Called when health reaches zero. Default implementation drops a corpse at
  * the current position.
@@ -163,5 +172,9 @@ Character::isVisible(const sf::Vector2f& target) const {
  */
 std::vector<std::shared_ptr<Character> >
 Character::getCharacters() const {
-	return mWorld.getCharacters(getPosition(), VISION_DISTANCE);
+	auto characters = mWorld.getCharacters(getPosition(), VISION_DISTANCE);
+	characters.erase(std::remove_if(characters.begin(), characters.end(),
+			[this](const std::shared_ptr<Character>& c)
+			{return c->getFaction() == getFaction();}), characters.end());
+	return characters;
 }

source/abstract/Character.h

@@ -19,6 +19,15 @@ class Yaml;
  * Provides think function for AI, manages health, drops body on death.
  */
 class Character : public Circle {
+public:
+	enum Faction {
+		FACTION_PLAYER = 1,
+		FACTION_ENEMIES = 2
+	};
+
+	/// Maximum distance where an enemy will be detected.
+	static const float VISION_DISTANCE;
+
 public:
 	explicit Character(const sf::Vector2f& position, Category category,
 			unsigned short mask, const Yaml& config, World& world,
@@ -26,10 +35,7 @@ public:
 	virtual ~Character() = 0;
 
 	void onDamage(int damage);
-
+	Faction getFaction() const;
-public:
-	/// Maximum distance where an enemy will be detected.
-	static const float VISION_DISTANCE;
 
 protected:
 	virtual void onThink(int elapsed);
@@ -56,6 +62,7 @@ private:
 	std::unique_ptr<Weapon> mWeapon;
 	std::vector<sf::Vector2f> mPath; //< Contains nodes to reach a set destination.
 	sf::Vector2f mLastPosition;
+	Faction mFaction;
 };
 
 #endif /* DG_ACTOR_H_ */

source/util/Yaml.h

@@ -89,6 +89,7 @@ namespace YAML_KEY {
 	const std::string HEALTH = "health";
 	const std::string SPEED = "speed";
 	const std::string WEAPON = "weapon";
+	const std::string FACTION = "faction";
 
 	// Bullet
 	const std::string DAMAGE = "damage";
@@ -107,6 +108,7 @@ namespace YAML_DEFAULT {
 	const int INTERVAL = 250;
 	const std::string BULLET = "bullet.yaml";
 	const bool AUTOMATIC = false;
+	const int FACTION = 1;
 }
 
 #endif /* DG_YAML_H_ */