From d5b880fb3fa978643816718159ca48b40b960f35 Mon Sep 17 00:00:00 2001
From: Christoph Sommer <mail@christoph-sommer.de>
Date: Mon, 24 Jul 2006 19:27:22 +0000
Subject: [PATCH] Physics class can have its gravity altered

SVN-Revision: 4082
---
 src/physic.cpp | 16 ++++++++++++++--
 src/physic.hpp |  8 ++++++++
 2 files changed, 22 insertions(+), 2 deletions(-)

diff --git a/src/physic.cpp b/src/physic.cpp
index 358b41c73..d7993cd30 100644
--- a/src/physic.cpp
+++ b/src/physic.cpp
@@ -23,7 +23,7 @@
 #include "physic.hpp"
 
 Physic::Physic()
-    : ax(0), ay(0), vx(0), vy(0), gravity_enabled_flag(true)
+    : ax(0), ay(0), vx(0), vy(0), gravity_enabled_flag(true), gravity(1000)
 {
 }
 
@@ -141,10 +141,22 @@ Physic::gravity_enabled() const
   return gravity_enabled_flag;
 }
 
+void
+Physic::set_gravity(float gravity)
+{
+  this->gravity = gravity;
+}
+
+float
+Physic::get_gravity() const
+{
+  return gravity;
+}
+
 Vector
 Physic::get_movement(float elapsed_time)
 {
-  float grav = gravity_enabled_flag ? 1000 : 0;
+  float grav = gravity_enabled_flag ? gravity : 0;
 
   Vector result(
       vx * elapsed_time + ax * elapsed_time * elapsed_time,
diff --git a/src/physic.hpp b/src/physic.hpp
index f7ec06514..e05b65f3b 100644
--- a/src/physic.hpp
+++ b/src/physic.hpp
@@ -67,6 +67,12 @@ public:
   /// Enables or disables handling of gravity.
   void enable_gravity(bool gravity_enabled);
   bool gravity_enabled() const;
+  
+  /// Set gravity to apply to object when enabled
+  void set_gravity(float gravity);
+  
+  /// Get gravity to apply to object when enabled
+  float get_gravity() const;
 
   Vector get_movement(float elapsed_time);
 
@@ -77,6 +83,8 @@ private:
   float vx, vy;
   /// should we respect gravity in out calculations?
   bool gravity_enabled_flag;
+  /// current gravity to apply to object, if enabled
+  float gravity;
 };
 
 #endif
-- 
2.11.0