From 657eed00ae73b8d06470cec0d955aeada537a90d Mon Sep 17 00:00:00 2001
From: Daniel Karbach <daniel.karbach@localhorst.tv>
Date: Sun, 30 Sep 2012 16:50:17 +0200
Subject: [PATCH] check tile lock in Entity

---
 src/map/Entity.cpp   | 12 +++++++++++-
 src/map/Entity.h     |  2 ++
 src/map/Map.h        |  2 ++
 src/map/MapState.cpp |  1 +
 4 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/src/map/Entity.cpp b/src/map/Entity.cpp
index 01cbe7f..c14c9a0 100644
--- a/src/map/Entity.cpp
+++ b/src/map/Entity.cpp
@@ -7,6 +7,8 @@
 
 #include "Entity.h"
 
+using geometry::Vector;
+
 namespace map {
 
 Entity::Entity()
@@ -15,12 +17,20 @@ Entity::Entity()
 }
 
 
+bool Entity::TileLock(int width, int height) const {
+	Vector<int> tilePosition(
+			position.X() - (width / 2),
+			position.Y() - height);
+	return (tilePosition.X() % width == 0) && (tilePosition.Y() % height == 0);
+}
+
+
 void Entity::Update(float deltaT) {
 	position += velocity * deltaT;
 }
 
 
-void Entity::Render(SDL_Surface *dest, const geometry::Vector<int> &offset) const {
+void Entity::Render(SDL_Surface *dest, const Vector<int> &offset) const {
 	if (animation.Running()) {
 		animation.DrawCenterBottom(dest, offset + position);
 	} else {
diff --git a/src/map/Entity.h b/src/map/Entity.h
index fd91f3e..d6ba5f3 100644
--- a/src/map/Entity.h
+++ b/src/map/Entity.h
@@ -34,6 +34,8 @@ public:
 	graphics::AnimationRunner &Animation() { return animation; }
 	const graphics::AnimationRunner &Animation() const { return animation; }
 
+	bool TileLock(int width, int height) const;
+
 	void Update(float deltaT);
 
 	void Render(SDL_Surface *, const geometry::Vector<int> &offset) const;
diff --git a/src/map/Map.h b/src/map/Map.h
index 5733760..92c866b 100644
--- a/src/map/Map.h
+++ b/src/map/Map.h
@@ -23,6 +23,8 @@ public:
 	~Map() { }
 
 public:
+	const graphics::Sprite *Tileset() const { return tileset; }
+
 	void Render(SDL_Surface *dest, const geometry::Vector<int> &offset) const;
 
 // temporary setters
diff --git a/src/map/MapState.cpp b/src/map/MapState.cpp
index 7f602a7..5477999 100644
--- a/src/map/MapState.cpp
+++ b/src/map/MapState.cpp
@@ -51,6 +51,7 @@ void MapState::Resize(int width, int height) {
 
 void MapState::HandleEvents(const Input &input) {
 	if (!controlled) return;
+	if (!controlled->TileLock(map->Tileset()->Width(), map->Tileset()->Height())) return;
 }
 
 void MapState::UpdateWorld(float deltaT) {
-- 
2.39.2