From 2c894acd98ed593c8433e29443f84035a2c74297 Mon Sep 17 00:00:00 2001
From: Aesylwinn <kyleacooley@gmail.com>
Date: Fri, 18 Mar 2016 16:06:35 -0400
Subject: [PATCH] Create a visual representation of the center of the orbit
 camera. For debugging purposes.

---
 apps/opencs/view/render/cameracontroller.cpp | 24 +++++++++++++++++++-
 apps/opencs/view/render/cameracontroller.hpp |  7 +++++-
 apps/opencs/view/render/scenewidget.cpp      |  2 +-
 3 files changed, 30 insertions(+), 3 deletions(-)

diff --git a/apps/opencs/view/render/cameracontroller.cpp b/apps/opencs/view/render/cameracontroller.cpp
index f1ed5635b..74f72938f 100644
--- a/apps/opencs/view/render/cameracontroller.cpp
+++ b/apps/opencs/view/render/cameracontroller.cpp
@@ -3,8 +3,12 @@
 #include <QKeyEvent>
 
 #include <osg/Camera>
+#include <osg/Geode>
+#include <osg/Group>
 #include <osg/Matrixd>
 #include <osg/Quat>
+#include <osg/Shape>
+#include <osg/ShapeDrawable>
 
 namespace CSVRender
 {
@@ -261,7 +265,7 @@ namespace CSVRender
     Orbit Camera Controller
     */
 
-    OrbitCameraController::OrbitCameraController()
+    OrbitCameraController::OrbitCameraController(osg::Group* group)
         : mInitialized(false)
         , mFast(false)
         , mLeft(false)
@@ -271,7 +275,10 @@ namespace CSVRender
         , mRollLeft(false)
         , mRollRight(false)
         , mCenter(0,0,0)
+        , mCenterNode(new osg::PositionAttitudeTransform())
     {
+        group->addChild(mCenterNode);
+        createShape();
     }
 
     bool OrbitCameraController::handleKeyEvent(QKeyEvent* event, bool pressed)
@@ -383,6 +390,8 @@ namespace CSVRender
         if (mRollRight)
             roll(rotDist);
 
+        mCenterNode->setPosition(mCenter);
+
         lookAtCenter();
 
         // Normalize the matrix to counter drift
@@ -409,6 +418,19 @@ namespace CSVRender
         mInitialized = true;
     }
 
+    void OrbitCameraController::createShape()
+    {
+        const float boxWidth = 100;
+
+        osg::ref_ptr<osg::Box> box = new osg::Box(osg::Vec3f(0, 0, 0), boxWidth);
+        osg::ref_ptr<osg::ShapeDrawable> drawable = new osg::ShapeDrawable(box);
+        drawable->setColor(osg::Vec4f(0.f, 0.9f, 0.f, 1.f));
+
+        osg::ref_ptr<osg::Geode> geode = new osg::Geode();
+        geode->addChild(drawable);
+        mCenterNode->addChild(geode);
+    }
+
     void OrbitCameraController::rotateHorizontal(double value)
     {
         osg::Vec3d position = getCamera()->getViewMatrix().getTrans();
diff --git a/apps/opencs/view/render/cameracontroller.hpp b/apps/opencs/view/render/cameracontroller.hpp
index 156b1cb56..6c89d20f7 100644
--- a/apps/opencs/view/render/cameracontroller.hpp
+++ b/apps/opencs/view/render/cameracontroller.hpp
@@ -4,6 +4,7 @@
 #include <string>
 
 #include <osg/BoundingBox>
+#include <osg/PositionAttitudeTransform>
 #include <osg/ref_ptr>
 #include <osg/Vec3d>
 
@@ -12,6 +13,7 @@ class QKeyEvent;
 namespace osg
 {
     class Camera;
+    class Group;
 }
 
 namespace CSVRender
@@ -97,7 +99,7 @@ namespace CSVRender
     {
         public:
 
-            OrbitCameraController();
+            OrbitCameraController(osg::Group* group);
 
             bool handleKeyEvent(QKeyEvent* event, bool pressed);
             bool handleMouseMoveEvent(std::string mode, int x, int y);
@@ -109,6 +111,7 @@ namespace CSVRender
             void onActivate();
 
             void initialize();
+            void createShape();
 
             void rotateHorizontal(double value);
             void rotateVertical(double value);
@@ -121,6 +124,8 @@ namespace CSVRender
             bool mInitialized;
             bool mFast, mLeft, mRight, mUp, mDown, mRollLeft, mRollRight;
             osg::Vec3d mCenter;
+
+            osg::ref_ptr<osg::PositionAttitudeTransform> mCenterNode;
     };
 }
 
diff --git a/apps/opencs/view/render/scenewidget.cpp b/apps/opencs/view/render/scenewidget.cpp
index 27c828ec4..dc0041c0f 100644
--- a/apps/opencs/view/render/scenewidget.cpp
+++ b/apps/opencs/view/render/scenewidget.cpp
@@ -164,7 +164,7 @@ SceneWidget::SceneWidget(boost::shared_ptr<Resource::ResourceSystem> resourceSys
     , mPrevMouseX(0)
     , mPrevMouseY(0)
     , mFreeCamControl(new FreeCameraController())
-    , mOrbitCamControl(new OrbitCameraController())
+    , mOrbitCamControl(new OrbitCameraController(mRootNode))
     , mCurrentCamControl(mFreeCamControl.get())
     , mCamPositionSet(false)
 {