From 2c18685d7e87c72562bdbeb01b7372748d9927a3 Mon Sep 17 00:00:00 2001
From: Patrik Gornicz <Gornicz.P@gmail.com>
Date: Fri, 1 Aug 2008 21:08:37 -0400
Subject: [PATCH] added screen collisions using an Effect

---
 src/Effects/Gravity.h   |  2 +-
 src/Effects/Screen.cpp  | 53 +++++++++++++++++++++++++++++++++++++++++++++++++
 src/Effects/Screen.h    | 19 ++++++++++++++++++
 src/Entities/Entity.cpp |  9 +++++++++
 src/Entities/Entity.h   |  3 +++
 src/Makefile            |  1 +
 src/effectManager.cpp   |  4 +++-
 src/entityManager.cpp   |  2 ++
 8 files changed, 91 insertions(+), 2 deletions(-)
 create mode 100644 src/Effects/Screen.cpp
 create mode 100644 src/Effects/Screen.h

diff --git a/src/Effects/Gravity.h b/src/Effects/Gravity.h
index dc04726..ac20d49 100644
--- a/src/Effects/Gravity.h
+++ b/src/Effects/Gravity.h
@@ -9,7 +9,7 @@ class Gravity: public Effect
 {
   public:
     Gravity();
-    virtual ~Gravity();
+    ~Gravity();
 
     Vector2 positionDelta(const PhysicsEntity*, float) const;
     Vector2 velocityDelta(const PhysicsEntity*, float) const;
diff --git a/src/Effects/Screen.cpp b/src/Effects/Screen.cpp
new file mode 100644
index 0000000..bbae5bb
--- /dev/null
+++ b/src/Effects/Screen.cpp
@@ -0,0 +1,53 @@
+#include "Screen.h"
+#include "../debug.h"
+
+#include "../Entities/PhysicsEntity.h"
+
+Screen::Screen()
+{
+
+}
+Screen::~Screen()
+{
+
+}
+
+Vector2 Screen::positionDelta(const PhysicsEntity*, float) const
+{
+    return Vector2(0,0);
+}
+
+Vector2 Screen::velocityDelta(const PhysicsEntity* e, float time_step) const
+{
+    const Vector2& pos = e->positionRaw();
+    const Vector2& velo = e->velocityRaw();
+
+    Vector2 acc(0,0);
+
+    if(pos.y > 600 && velo.y > 0)
+    {
+        acc.y += velo.y * -2;
+    }
+
+    if(pos.y < 0 && velo.y < 0)
+    {
+        acc.y += velo.y * -2;
+    }
+
+    if(pos.x > 800 && velo.x > 0)
+    {
+        acc.x += velo.x * -2;
+    }
+
+    if(pos.x < 0 && velo.x < 0)
+    {
+        acc.x += velo.x * -2;
+    }
+
+    return acc;
+}
+
+Vector2 Screen::forceDelta(const PhysicsEntity*, float) const
+{
+    return Vector2(0,0);
+}
diff --git a/src/Effects/Screen.h b/src/Effects/Screen.h
new file mode 100644
index 0000000..9403687
--- /dev/null
+++ b/src/Effects/Screen.h
@@ -0,0 +1,19 @@
+#ifndef SCREEN_H
+#define SCREEN_H
+
+#include "../Vector2.h"
+#include "Effect.h"
+
+/// ***** Header Class *****
+class Screen: public Effect
+{
+  public:
+    Screen();
+    ~Screen();
+
+    Vector2 positionDelta(const PhysicsEntity*, float) const;
+    Vector2 velocityDelta(const PhysicsEntity*, float) const;
+    Vector2 forceDelta(const PhysicsEntity*, float) const;
+};
+
+#endif // SCREEN_H
diff --git a/src/Entities/Entity.cpp b/src/Entities/Entity.cpp
index 462fcd0..5365bcc 100644
--- a/src/Entities/Entity.cpp
+++ b/src/Entities/Entity.cpp
@@ -5,6 +5,15 @@
 
 /// ***** Public Class Methods *****
 
+const Vector2& Entity::positionRaw() const
+{
+    return position;
+}
+const Vector2& Entity::velocityRaw() const
+{
+    return velocity;
+}
+
 Entity::Entity(const Vector2& pos)
   : position(pos), velocity(0,0)
 {
diff --git a/src/Entities/Entity.h b/src/Entities/Entity.h
index 65fe632..b5b268d 100644
--- a/src/Entities/Entity.h
+++ b/src/Entities/Entity.h
@@ -15,6 +15,9 @@ class Entity
     virtual void update(float) = 0;
     virtual void draw() const = 0;
 
+    const Vector2& positionRaw() const;
+    const Vector2& velocityRaw() const;
+
   protected:
     Vector2 position;
     Vector2 velocity;
diff --git a/src/Makefile b/src/Makefile
index b399061..6168eb3 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -39,6 +39,7 @@ SRCS += GameStates/Running.cpp
 
 SRCS += Effects/Effect.cpp
 SRCS += Effects/Gravity.cpp
+SRCS += Effects/Screen.cpp
 
 SRCS += input/inputManager.cpp
 
diff --git a/src/effectManager.cpp b/src/effectManager.cpp
index b661f51..cc3eb73 100644
--- a/src/effectManager.cpp
+++ b/src/effectManager.cpp
@@ -2,6 +2,7 @@
 
 #include "Effects/Effect.h"
 #include "Effects/Gravity.h"
+#include "Effects/Screen.h"
 
 /// ***** Private Variables *****
 Effect** effects;
@@ -11,10 +12,11 @@ int numEffects;
 
 void effect::init()
 {
-    numEffects = 1;
+    numEffects = 2;
     effects = new Effect*[numEffects]();
 
     effects[0] = new Gravity();
+    effects[1] = new Screen();
 }
 void effect::clean()
 {
diff --git a/src/entityManager.cpp b/src/entityManager.cpp
index 850f70f..5fe9878 100644
--- a/src/entityManager.cpp
+++ b/src/entityManager.cpp
@@ -29,9 +29,11 @@ bool clearPhysics;
 
 void manager::init()
 {
+
 }
 void manager::clean()
 {
+
 }
 
 void manager::add(Entity* e)
-- 
2.10.2