OGER SDK研究之五 Demo_SkyDemo 天空穹

最新推荐文章于 2019-04-04 10:51:22 发布

原创最新推荐文章于 2019-04-04 10:51:22 发布 · 2k 阅读

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SkyDemo.h

/*
-----------------------------------------------------------------------------
This source file is part of OGRE
(Object-oriented Graphics Rendering Engine)
For the latest info, see http://www.ogre3d.org/

You may use this sample code for anything you like, it is not covered by the
LGPL like the rest of the engine.

-----------------------------------------------------------------------------
*/

/**
    /file
        SkyDome.h
    /brief
        Specialisation of OGRE's framework application to show the
        skydome feature
  //加入一个天空穹
*/

#include "ExampleApplication.h"

// Event handler to add ability to alter curvature
class SkyDomeFrameListener : public ExampleFrameListener
{
protected:
    Real mCurvature;   //曲率
    Real mTiling;    //天顶位置
    SceneManager* mSceneMgr; //场管指针
public:
    SkyDomeFrameListener(RenderWindow* win, Camera* cam, SceneManager* mgr)
        : ExampleFrameListener(win, cam)
    {
        mSceneMgr = mgr;
        mCurvature = 1;
        mTiling = 15;

}

    bool frameStarted(const FrameEvent& evt)
    {
        // Change curvature / tiling
        // Delay timer to stop too quick updates of curvature
        static Real timeDelay = 0;

        bool updateSky;
        updateSky = false;

        if(!ExampleFrameListener::frameStarted(evt))
            return false;

        if (mKeyboard->isKeyDown(OIS::KC_H) && timeDelay <= 0)
        {
   //按H增大曲率
            mCurvature += 1;
            timeDelay = 0.1;
            updateSky = true;
        }
        if (mKeyboard->isKeyDown(OIS::KC_G) && timeDelay <= 0)
        {
   //按G减小曲率
            mCurvature -= 1;
            timeDelay = 0.1;
            updateSky = true;
        }

        if (mKeyboard->isKeyDown(OIS::KC_U) && timeDelay <= 0)
        {
   //按U增大天顶
            mTiling += 1;
            timeDelay = 0.1;
            updateSky = true;
        }
        if (mKeyboard->isKeyDown(OIS::KC_Y) && timeDelay <= 0)
        {
   //按Y减小天顶
            mTiling -= 1;
            timeDelay = 0.1;
            updateSky = true;
        }

if (timeDelay > 0)
timeDelay -= evt.timeSinceLastFrame;

        if (updateSky)
        {
   //重设置天空DEMO
            mSceneMgr->setSkyDome(true, "Examples/CloudySky", mCurvature, mTiling);
        }

return true;

}
};

class SkyDomeApplication : public ExampleApplication
{
public:
    SkyDomeApplication()
    {
    }

protected:
    // Just override the mandatory create scene method
    void createScene(void)
    {
        // Set ambient light
  //设置环境光
        mSceneMgr->setAmbientLight(ColourValue(0.5, 0.5, 0.5));

        // Create a skydome
  //创建一个天空盒（穹）
        mSceneMgr->setSkyDome(true, "Examples/CloudySky", 5, 8);

        // Create a light
  //创建一个自定义灯光
        Light* l = mSceneMgr->createLight("MainLight");
        // Accept default settings: point light, white diffuse, just set position
        // NB I could attach the light to a SceneNode if I wanted it to move automatically with
        // other objects, but I don't
  //设置灯光位置
        l->setPosition(20,80,50);

//实体
Entity *ent;

        // Define a floor plane mesh
  //定义一个层模型
        Plane p;
        p.normal = Vector3::UNIT_Y;
        p.d = 200;
  //创建一个自定义平面
        MeshManager::getSingleton().createPlane("FloorPlane",
            ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME,
            p,2000,2000,1,1,true,1,5,5,Vector3::UNIT_Z);

        // Create an entity (the floor)
  //由自定义创建实体
        ent = mSceneMgr->createEntity("floor", "FloorPlane");
  //设置材质
        ent->setMaterialName("Examples/RustySteel");
  //将实体加入场景
        mSceneMgr->getRootSceneNode()->attachObject(ent);
  //由模型创建一个实体
        ent = mSceneMgr->createEntity("head", "ogrehead.mesh");
        // Attach to child of root node, better for culling (otherwise bounds are the combination of the 2)
  //将实体加入场景（放在原点位置）
        mSceneMgr->getRootSceneNode()->createChildSceneNode()->attachObject(ent);

    }
    // Create new frame listener
    void createFrameListener(void)
    {
  //创建自定义帧监听器并连接
        mFrameListener= new SkyDomeFrameListener(mWindow, mCamera, mSceneMgr);
        mRoot->addFrameListener(mFrameListener);
    }

    bool setup()
    {
  //在设置时
        ExampleApplication::setup();
  //记录所有信息，只有当需要细微的调试的时候可能才会需要
        LogManager::getSingleton().setLogDetail( LL_BOREME );
        return true;
    }
};

SkyDemo.cpp

You may use this sample code for anything you like, it is not covered by the
LGPL like the rest of the engine.
-----------------------------------------------------------------------------
*/

/**
    /file
        SkyDome.cpp
    /brief
        Show's Ogre's skydome feature
*/

#include "SkyDome.h"

#if OGRE_PLATFORM == OGRE_PLATFORM_WIN32
#define WIN32_LEAN_AND_MEAN
#include "windows.h"
#endif

#ifdef __cplusplus
extern "C" {
#endif

#if OGRE_PLATFORM == OGRE_PLATFORM_WIN32
INT WINAPI WinMain( HINSTANCE hInst, HINSTANCE, LPSTR strCmdLine, INT )
#else
int main(int argc, char *argv[])
#endif
{

// Create application object
SkyDomeApplication app;

    try {
        app.go();
    } catch( Ogre::Exception& e ) {
#if OGRE_PLATFORM == OGRE_PLATFORM_WIN32
        MessageBox( NULL, e.getFullDescription().c_str(), "An exception has occured!", MB_OK | MB_ICONERROR | MB_TASKMODAL);
#else
        std::cerr << "An exception has occured: " <<
            e.getFullDescription().c_str() << std::endl;
#endif
    }

return 0;
}

#ifdef __cplusplus
}
#endif