From 8e65b94667b96a26a6ca19ab0be5ba2532066b8f Mon Sep 17 00:00:00 2001
From: Felix Ableitner <felixableitner@gmail.com>
Date: Fri, 29 Mar 2013 18:48:49 +0100
Subject: [PATCH] Added function to get nearby characters.

---
 source/World.cpp              | 14 ++++++++++++++
 source/World.h                |  2 ++
 source/abstract/Character.cpp |  8 ++++++++
 source/abstract/Character.h   |  1 +
 4 files changed, 25 insertions(+)

diff --git a/source/World.cpp b/source/World.cpp
index fe6d239..8f31c92 100755
--- a/source/World.cpp
+++ b/source/World.cpp
@@ -226,6 +226,20 @@ World::getPath(const sf::Vector2f& start, const sf::Vector2f& end,
 	return path;
 }
 
+/**
+ * Returns all characters that are within maxDistance from position.
+ */
+std::vector<std::shared_ptr<Character> >
+		World::getCharacters(const sf::Vector2f& position, float maxDistance) const {
+	std::vector<std::shared_ptr<Character> > visible;
+	for (auto it : mCharacters) {
+		if (thor::squaredLength(position - it->getPosition()) <=
+				maxDistance * maxDistance) {
+			visible.push_back(it);
+		}
+	}
+	return visible;
+}
 /**
  * Returns the linear distance between two areas (using their center).
  */
diff --git a/source/World.h b/source/World.h
index 35a7b83..57defed 100755
--- a/source/World.h
+++ b/source/World.h
@@ -32,6 +32,8 @@ public:
 	void generateAreas();
 	std::vector<sf::Vector2f> getPath(const sf::Vector2f& start,
 			const sf::Vector2f& end, float radius) const;
+	std::vector<std::shared_ptr<Character> >
+			getCharacters(const sf::Vector2f& position, float maxDistance) const;
 
 // Private types.
 private:
diff --git a/source/abstract/Character.cpp b/source/abstract/Character.cpp
index c6effce..0a67dde 100644
--- a/source/abstract/Character.cpp
+++ b/source/abstract/Character.cpp
@@ -132,3 +132,11 @@ Character::move() {
 		}
 	}
 }
+
+/**
+ * Calls World::getCharacters with current position.
+ */
+std::vector<std::shared_ptr<Character> >
+Character::getCharacters(float maxDistance) const {
+	return mWorld.getCharacters(getPosition(), maxDistance);
+}
diff --git a/source/abstract/Character.h b/source/abstract/Character.h
index 6dc9a1d..38532d2 100644
--- a/source/abstract/Character.h
+++ b/source/abstract/Character.h
@@ -34,6 +34,7 @@ protected:
 	void releaseTrigger();
 	bool setDestination(const sf::Vector2f& destination);
 	void move();
+	std::vector<std::shared_ptr<Character> > getCharacters(float maxDistance) const;
 
 // Private variables.
 private: