From 2b3dc3c6687de059c4a2bf634ba56ba20a4c2253 Mon Sep 17 00:00:00 2001
From: stevo14 <stevo14@178a84e3-b1eb-0310-8ba1-8eac791a3b58>
Date: Tue, 12 May 2009 20:23:27 +0000
Subject: [PATCH] Implemented CM_REVERSE camera mode for looking backwards.

git-svn-id: svn+ssh://svn.code.sf.net/p/supertuxkart/code/main/branches/irrlicht@3480 178a84e3-b1eb-0310-8ba1-8eac791a3b58
---
 src/graphics/camera.cpp   | 16 +++++++++++++++-
 src/graphics/camera.hpp   |  3 ++-
 src/karts/player_kart.cpp |  9 +++++++++
 3 files changed, 26 insertions(+), 2 deletions(-)

diff --git a/src/graphics/camera.cpp b/src/graphics/camera.cpp
index 06c742149..10f72022c 100644
--- a/src/graphics/camera.cpp
+++ b/src/graphics/camera.cpp
@@ -166,6 +166,20 @@ void Camera::update(float dt)
         m_position *= m_distance;
         m_position += m_target;
 
+        break;
+    case CM_REVERSE: // Same as CM_NORMAL except it looks backwards
+        m_angle_around = m_kart->getHPR().getX() - m_rotation_range * m_kart->getSteerPercent() * m_kart->getSkidding();
+        m_angle_up     = m_kart->getHPR().getY() + DEGREE_TO_RAD(30.0f);      
+
+        m_target = m_kart->getXYZ();
+        m_target.setZ(m_target.getZ()+0.75f);
+
+        m_position.setX(-sin(m_angle_around));
+        m_position.setY( cos(m_angle_around));
+        m_position.setZ( sin(m_angle_up));
+        m_position *= m_distance * 2.0f;
+        m_position += m_target;
+
         break;
     case CM_CLOSEUP: // Lower to the ground and closer to the kart
         m_angle_around = m_kart->getHPR().getX() + m_rotation_range * m_kart->getSteerPercent() * m_kart->getSkidding();
@@ -177,7 +191,7 @@ void Camera::update(float dt)
         m_position.setX( sin(m_angle_around));
         m_position.setY(-cos(m_angle_around));
         m_position.setZ(-sin(m_angle_up));
-        m_position *= m_distance * 0.75f;
+        m_position *= m_distance * 0.5f;
         m_position += m_target;
 
         break;
diff --git a/src/graphics/camera.hpp b/src/graphics/camera.hpp
index 31df02644..905e7106d 100644
--- a/src/graphics/camera.hpp
+++ b/src/graphics/camera.hpp
@@ -36,7 +36,8 @@ class Camera
 public:
     enum Mode {
         CM_NORMAL,        // Normal camera mode
-        CM_CLOSEUP,       // Normal camera, closer to kart
+        CM_CLOSEUP,       // Closer to kart
+        CM_REVERSE,       // Looking backwards
         CM_LEADER_MODE,   // for deleted player karts in follow the leader
         CM_FINAL,         // Final camera to show the end of the race
         CM_SIMPLE_REPLAY
diff --git a/src/karts/player_kart.cpp b/src/karts/player_kart.cpp
index b1f7009de..d73134408 100644
--- a/src/karts/player_kart.cpp
+++ b/src/karts/player_kart.cpp
@@ -256,6 +256,15 @@ void PlayerKart::update(float dt)
             Kart::beep();
     }
 
+    if(m_controls.m_look_back)
+    {
+        m_camera->setMode(Camera::CM_REVERSE);
+    }
+    else
+    {
+        m_camera->setMode(Camera::CM_NORMAL);
+    }
+
     // We can't restrict rescue to fulfil isOnGround() (which would be more like
     // MK), since e.g. in the City track it is possible for the kart to end
     // up sitting on a brick wall, with all wheels in the air :((