From a1c89e41e38eca790e168b8acd3beee974685fcd Mon Sep 17 00:00:00 2001
From: Daniel Karbach <daniel.karbach@localhorst.tv>
Date: Wed, 3 Oct 2012 17:23:31 +0200
Subject: [PATCH] added entity follower list

still unfinished due to movement detection bugs

refs #17
refs #20
---
 src/main.cpp         |  9 +++++++++
 src/map/Entity.cpp   | 31 ++++++++++++++++++++++++++++++-
 src/map/Entity.h     | 14 ++++++++++----
 src/map/MapState.cpp | 10 ++++++++++
 src/map/MapState.h   |  2 ++
 5 files changed, 61 insertions(+), 5 deletions(-)

diff --git a/src/main.cpp b/src/main.cpp
index 745ec4b..951eccc 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -341,18 +341,24 @@ int main(int argc, char **argv) {
 		SimpleAnimation mapSelanAnimation(&mapSelanSprite, (tileSize/walkSpeed) / 2 * 1000, 2, 0, 0, true);
 		Entity mapSelan;
 		mapSelan.SetAnimation(&mapSelanAnimation);
+		mapSelan.Position() = Vector<float>(80, 128);
+		mapMaxim.AddFollower(&mapSelan);
 
 		SDL_Surface *mapGuyImg(IMG_Load("test-data/guy-map.png"));
 		Sprite mapGuySprite(mapGuyImg, 32, 64);
 		SimpleAnimation mapGuyAnimation(&mapGuySprite, (tileSize/walkSpeed) / 2 * 1000, 2, 0, 0, true);
 		Entity mapGuy;
 		mapGuy.SetAnimation(&mapGuyAnimation);
+		mapGuy.Position() = Vector<float>(80, 128);
+		mapSelan.AddFollower(&mapGuy);
 
 		SDL_Surface *mapDekarImg(IMG_Load("test-data/dekar-map.png"));
 		Sprite mapDekarSprite(mapDekarImg, 32, 64);
 		SimpleAnimation mapDekarAnimation(&mapDekarSprite, (tileSize/walkSpeed) / 2 * 1000, 2, 0, 0, true);
 		Entity mapDekar;
 		mapDekar.SetAnimation(&mapDekarAnimation);
+		mapDekar.Position() = Vector<float>(80, 128);
+		mapGuy.AddFollower(&mapDekar);
 
 		InitScreen screen(width, height);
 
@@ -372,6 +378,9 @@ int main(int argc, char **argv) {
 		} else {
 			MapState *mapState(new MapState(&map));
 			mapState->AddEntity(&mapMaxim);
+//			mapState->AddEntity(&mapSelan);
+//			mapState->AddEntity(&mapGuy);
+//			mapState->AddEntity(&mapDekar);
 			mapState->ControlEntity(&mapMaxim);
 			mapState->SetWalkingSpeed(walkSpeed);
 			state = mapState;
diff --git a/src/map/Entity.cpp b/src/map/Entity.cpp
index b9fba97..08be97b 100644
--- a/src/map/Entity.cpp
+++ b/src/map/Entity.cpp
@@ -12,7 +12,8 @@ using geometry::Vector;
 namespace map {
 
 Entity::Entity()
-: animation(0)
+: follower(0)
+, animation(0)
 , orientation(ORIENTATION_NORTH)
 , speed(0) {
 	runner.SetFrameShift(1);
@@ -30,6 +31,34 @@ void Entity::SetSpeed(float s) {
 	UpdateVelocity();
 }
 
+void Entity::StartAnimation(app::Application &ctrl) {
+	runner.Start(ctrl);
+}
+
+void Entity::StartAnimation(app::State &ctrl) {
+	runner.Start(ctrl);
+}
+
+void Entity::StopAnimation() {
+	runner.Stop();
+}
+
+void Entity::AddFollower(Entity *f) {
+	if (follower) {
+		follower->AddFollower(f);
+	} else {
+		follower = f;
+	}
+}
+
+void Entity::RemoveFollower(Entity *f) {
+	if (follower == f) {
+		follower = follower->follower;
+	} else if (follower) {
+		follower->RemoveFollower(f);
+	}
+}
+
 void Entity::SetAnimation(const graphics::Animation *a) {
 	animation = a;
 	runner.ChangeAnimation(animation);
diff --git a/src/map/Entity.h b/src/map/Entity.h
index 926c360..94090a1 100644
--- a/src/map/Entity.h
+++ b/src/map/Entity.h
@@ -39,15 +39,20 @@ public:
 	const geometry::Vector<float> &Velocity() const { return velocity; }
 
 	void SetAnimation(const graphics::Animation *a);
-	void StartAnimation(app::Application &ctrl) { runner.Start(ctrl); }
-	void StartAnimation(app::State &ctrl) { runner.Start(ctrl); }
-	void StopAnimation() { runner.Stop(); }
+	void StartAnimation(app::Application &ctrl);
+	void StartAnimation(app::State &ctrl);
+	void StopAnimation();
 	bool AnimationRunning() const { return runner.Running(); }
 
 	void SetOrientation(Orientation);
 	Orientation GetOrientation() const { return orientation; }
 	void SetSpeed(float);
 
+	Entity *Follower() { return follower; }
+	const Entity *Follower() const { return follower; }
+	void AddFollower(Entity *);
+	void RemoveFollower(Entity *);
+
 	bool TileLock(int width, int height) const;
 
 	void Update(float deltaT);
@@ -55,9 +60,10 @@ public:
 	void Render(SDL_Surface *, const geometry::Vector<int> &offset) const;
 
 private:
-	void UpdateVelocity();
+	void UpdateVelocity();;
 
 private:
+	Entity *follower;
 	const graphics::Animation *animation;
 	graphics::AnimationRunner runner;
 	geometry::Vector<float> position;
diff --git a/src/map/MapState.cpp b/src/map/MapState.cpp
index 3be5a45..b529e21 100644
--- a/src/map/MapState.cpp
+++ b/src/map/MapState.cpp
@@ -77,6 +77,7 @@ void MapState::UpdateWorld(float deltaT) {
 		}
 		if (nextDirection >= 0) {
 			if (afterLock) {
+				// FIXME: this check is unreliable, see #21
 				OnMove();
 				afterLock = false;
 			}
@@ -130,6 +131,15 @@ void MapState::OnGridLock() {
 
 void MapState::OnMove() {
 	// TODO: evaluate monster movements
+	UpdateFollower(controlled);
+}
+
+void MapState::UpdateFollower(Entity *e) {
+	if (!e->Follower()) return;
+	UpdateFollower(e->Follower());
+
+	e->Follower()->SetOrientation(e->GetOrientation());
+	// TODO: set follower speed
 }
 
 
diff --git a/src/map/MapState.h b/src/map/MapState.h
index 2b53069..b753ccf 100644
--- a/src/map/MapState.h
+++ b/src/map/MapState.h
@@ -47,6 +47,8 @@ private:
 	void OnGridLock();
 	void OnMove();
 
+	void UpdateFollower(Entity *);
+
 private:
 	Map *map;
 	Entity *controlled;
-- 
2.39.2