diff --git a/src/character.cpp b/src/character.cpp
index aebdec6..971e4f9 100644
--- a/src/character.cpp
+++ b/src/character.cpp
@@ -20,6 +20,7 @@
 #include "character.hpp"
 #include "inputbag.hpp"
 #include "gameactions.hpp"
+#include "worldgrid.hpp"
 #include <ciso646>
 #include <cassert>
 
@@ -32,9 +33,11 @@ namespace curry {
 		m_position(vec2f(0.0f), vec2f(0.0f), vec2f(0.0f)),
 		m_width_height(0.0f),
 		m_input_bag(parInputBag),
+		m_world(parDeferredRegister.world()),
 		m_speed(1.0f)
 	{
 		assert(m_input_bag);
+		assert(m_world);
 	}
 
 	void Character::load (const char* parTexturePath, cloonel::SDLMain& parSDLMain) {
@@ -95,7 +98,13 @@ namespace curry {
 			offset.y() -= speed;
 		if (cloonel::IsPressed(*m_input_bag, ActionDown))
 			offset.y() += speed;
-		this->set_position(this->position() + offset);
+
+		const auto old_pos = this->position();
+		const auto new_pos = old_pos + offset;
+
+		//if (m_world
+
+		this->set_position(new_pos);
 	}
 
 	void Character::set_speed (float parSpeed) {
diff --git a/src/character.hpp b/src/character.hpp
index 51fd4a8..008410a 100644
--- a/src/character.hpp
+++ b/src/character.hpp
@@ -32,6 +32,8 @@ namespace cloonel {
 } //namespace cloonel
 
 namespace curry {
+	class WorldGrid;
+
 	class Character : public WorldSizeNotifiable, public Moveable {
 	public:
 		Character (cloonel::InputBag* parInputBag, const WorldSizeNotifiable::DeferredRegister& parDeferredRegister);
@@ -54,6 +56,7 @@ namespace curry {
 		Texture m_texture;
 		vec2f m_width_height;
 		cloonel::InputBag* m_input_bag;
+		WorldGrid* m_world;
 		float m_speed;
 	};
 } //namespace curry
diff --git a/src/worldgrid.cpp b/src/worldgrid.cpp
index 4a7ee04..6e845c8 100644
--- a/src/worldgrid.cpp
+++ b/src/worldgrid.cpp
@@ -121,4 +121,18 @@ namespace curry {
 	vec2i world_size_pixel (const WorldGrid& parWorld) {
 		return parWorld.tile_size() * parWorld.world_size();
 	}
+
+	vec2us pixel_to_world_tile (const WorldGrid& parWorld, const vec2i& parPos) {
+		assert(position_is_on_map(parWorld, parPos));
+		return vector_cast<vec2us>(
+			parPos / vector_cast<vec2i>(parWorld.tile_size())
+		);
+	}
+
+	bool position_is_on_map (const WorldGrid& parWorld, const vec2i& parPos) {
+		assert(parWorld.tile_size() > vec2us(0));
+
+		return parPos >= vec2i(0) and
+			parPos / vector_cast<vec2i>(parWorld.tile_size()) < parWorld.world_size();
+	}
 } //namespace curry
diff --git a/src/worldgrid.hpp b/src/worldgrid.hpp
index 6e405a1..1dd94af 100644
--- a/src/worldgrid.hpp
+++ b/src/worldgrid.hpp
@@ -57,4 +57,6 @@ namespace curry {
 	};
 
 	vec2i world_size_pixel (const WorldGrid& parWorld);
+	vec2us pixel_to_world_tile (const WorldGrid& parWorld, const vec2i& parPos);
+	bool position_is_on_map (const WorldGrid& parWorld, const vec2i& parPos);
 } //namespace curry