OGRE 入门 三、Basic Tutorial 2 : Cameras, Lights, and Shadows

1. 编写代码：

在上次的文件夹中新建BasicTutorial2.h和BasicTutorial2.cpp文件：

BasicTutorial2.h:

1 #ifndef BASICTUTORIAL2_H
2 #define BASICTUTORIAL2_H
3
4 #include "BaseApplication.h"
5
6 class BasicTutorial2:public BaseApplication
7 {
8 public:
9     BasicTutorial2(void);
10     virtual ~BasicTutorial2(void);
11
12 protected:
13     virtual void createScene(void);
14     virtual void createCamera(void);
15     virtual void createViewports(void);
16 };
17
18 #endif

BasicTutorial2.cpp:

1 #include "BasicTutorial2.h"
2
3 BasicTutorial2::BasicTutorial2(void)
4 {}
5
6 BasicTutorial2::~BasicTutorial2(void)
7 {}
8
9 void BasicTutorial2::createViewports(void)
10 {
11     Ogre::Viewport* vp=mWindow->addViewport(mCamera);
12
13     vp->setBackgroundColour(Ogre::ColourValue(0,0,0));
14     mCamera->setAspectRatio(Ogre::Real(vp->getActualWidth())/
15                             Ogre::Real(vp->getActualHeight()));
16
17 }
18
19 void BasicTutorial2::createScene(void)
20 {
21     mSceneMgr->setAmbientLight(Ogre::ColourValue(0,0,0));
22     mSceneMgr->setShadowTechnique(Ogre::SHADOWTYPE_STENCIL_ADDITIVE);
23
24     Ogre::Entity* entNinja=mSceneMgr->createEntity("Ninja","ninja.mesh");
25     entNinja->setCastShadows(true);
26     mSceneMgr->getRootSceneNode()->createChildSceneNode()->attachObject(entNinja);
27
28     Ogre::Plane plane(Ogre::Vector3::UNIT_Y,0);
29
30     Ogre::MeshManager::getSingleton().createPlane("ground",
31                                                   Ogre::ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME,
32                                                   plane,
33                                                   1500,
34                                                   1500,
35                                                   20,
36                                                   20,
37                                                   true,
38                                                   1,5,5,
39                                                   Ogre::Vector3::UNIT_Z);
40     Ogre::Entity* entGround=mSceneMgr->createEntity("GroundEntity","ground");
41     mSceneMgr->getRootSceneNode()->createChildSceneNode()->attachObject(entGround);
42
43     entGround->setMaterialName("Examples/Rockwall");
44     entGround->setCastShadows(false);
45     /* lights */
46     Ogre::Light* pointLight=mSceneMgr->createLight("pointLight");
47     pointLight->setType(Ogre::Light::LT_POINT);
48     pointLight->setPosition(Ogre::Vector3(0,150,250));
49
50     pointLight->setDiffuseColour(1.0,0,0);
51     pointLight->setSpecularColour(1.0,0,0);
52
53     Ogre::Light* directionalLight=mSceneMgr->createLight("directionalLight");
54     directionalLight->setType(Ogre::Light::LT_DIRECTIONAL);
55     directionalLight->setDiffuseColour(Ogre::ColourValue(.25,.25,0));
56     directionalLight->setSpecularColour(Ogre::ColourValue(.25,.25,0));
57
58     directionalLight->setDirection(Ogre::Vector3(0,-1,1));
59
60     Ogre::Light* spotLight=mSceneMgr->createLight("spotLight");
61     spotLight->setType(Ogre::Light::LT_SPOTLIGHT);
62     spotLight->setDiffuseColour(0,0,1.0);
63     spotLight->setSpecularColour(0,0,1.0);
64
65     spotLight->setDirection(-1,-1,0);
66     spotLight->setPosition(Ogre::Vector3(300,300,0));
67
68     spotLight->setSpotlightRange(Ogre::Degree(35),Ogre::Degree(35));
69
70
71 }
72
73 void BasicTutorial2::createCamera(void)
74 {
75     mCamera=mSceneMgr->createCamera("PlayerCam");
76
77     mCamera->setPosition(Ogre::Vector3(0,10,500));
78     mCamera->lookAt(Ogre::Vector3(0,0,0));
79     mCamera->setNearClipDistance(5);
80
81     mCameraMan=new OgreBites::SdkCameraMan(mCamera);
82
83 }
84
85
86 int main(int argc,char* argv[])
87 {
88     BasicTutorial2 app;
89
90     try
91     {
92         app.go();
93     } catch (Ogre::Exception& e)
94     {
95         std::cerr<<"An exception has occured:"<<
96                 e.getFullDescription().c_str()<<std::endl;
97
98     }
99
100     return 0;
101 }

修改CMakeLists.txt中以下几行，注释教程1中的头文件及代码，并加入新建的头文件和代码

set(HDRS
./BaseApplication.h
# ./TutorialApplication.h
./BasicTutorial2.h
)

set(SRCS
./BaseApplication.cpp
./BasicTutorial2.cpp
# ./TutorialApplication.cpp
)

复制nanjia.mesh文件到当前文件夹的dist/media/models中，nanjia.mesh 在ogre的源代码包里，在第一次下载的代码包里搜索一下就有了。

同样的，将dist/media中的子文件夹以源代码包中的Sample/Media/materials中的同名文件夹覆盖，其实就是一些资源文件，启动demo的时候会加载。

2. 编译，安装：

cmake CMakeLists.txt
make install

3. 运行：

效果如图：