【笔记】七、多场景管理器

// 多场景管理器 #include "ExampleApplication.h" // 定义摄像机的名称，公用 #define CAMERA_NAME "SceneCamera" // 单屏显示整个场景 void setupViewport(RenderWindow *win, SceneManager *curr) { win->removeAllViewports(); Camera *cam = curr->getCamera(CAMERA_NAME);// 取得当前摄像机 Viewport *vp = win->addViewport(cam);// 为当前摄像机添加视口 vp->setBackgroundColour(ColourValue(0, 0, 0));// 设置视口背景色 cam->setAspectRatio(Real(vp->getActualWidth()) / Real(vp->getActualHeight()));// 设置视口纵宽比 } // 同时显示两个场景 void dualViewport(RenderWindow *win, SceneManager *primary, SceneManager *secondary) { win->removeAllViewports(); Viewport *vp = 0; Camera *cam = primary->getCamera(CAMERA_NAME); vp = win->addViewport(cam, 0, 0, 0, 0.5, 1); vp->setBackgroundColour(ColourValue(0, 0, 0)); cam->setAspectRatio(Real(vp->getActualWidth()) / Real(vp->getActualHeight())); cam = secondary->getCamera(CAMERA_NAME); vp = win->addViewport(cam, 1, 0.5, 0, 0.5, 1); vp->setBackgroundColour(ColourValue(0, 0, 0)); cam->setAspectRatio(Real(vp->getActualWidth()) / Real(vp->getActualHeight())); } class SMTutorialListener : public ExampleFrameListener, public OIS::KeyListener { public: SMTutorialListener(RenderWindow* win, SceneManager *primary, SceneManager *secondary) : ExampleFrameListener(win, primary->getCamera(CAMERA_NAME), true, false), mPrimary(primary), mSecondary(secondary), mDual(false), mContinue(true) {// 初始化各个参数，使用带缓冲的键盘输入 mKeyboard->setEventCallback(this); } bool frameStarted(const FrameEvent& evt) { mKeyboard->capture();// 捕获键盘信息 return mContinue; } bool keyPressed(const OIS::KeyEvent &arg) { switch (arg.key) { case OIS::KC_ESCAPE: mContinue = false; break;// ESC键退出 case OIS::KC_V: mDual = !mDual;// 状态切换 if (mDual) { dualViewport(mWindow, mPrimary, mSecondary); } else { setupViewport(mWindow, mPrimary); } break; case OIS::KC_C: // 交换两个场景管理器 swap(mPrimary, mSecondary); if (mDual) { dualViewport(mWindow, mPrimary, mSecondary); } else { setupViewport(mWindow, mPrimary); } break; default: break; } return true; } bool keyReleased(const OIS::KeyEvent &) {return true;} private: SceneManager *mPrimary, *mSecondary; bool mDual, mContinue; // 交换场景管理器 static void swap(SceneManager *&first, SceneManager *&second) { SceneManager *tmp = first; first = second; second = tmp; } }; class SMTutorialApplication : public ExampleApplication { public: SMTutorialApplication() { } ~SMTutorialApplication() { } protected: SceneManager *mPrimary, *mSecondary; void chooseSceneManager(void) { // 在Root下创建两个场景管理器 mPrimary = mRoot->createSceneManager(ST_GENERIC, "primary"); mSecondary = mRoot->createSceneManager(ST_GENERIC, "secondary"); } void createCamera() { // 为两个场景管理器创建摄像机 mPrimary->createCamera(CAMERA_NAME); mSecondary->createCamera(CAMERA_NAME); } void createViewports() { // 为第一个场景管理器创建视口 setupViewport(mWindow, mPrimary); } void createScene(void) { // 为两个场景管理器设置天空盒和天空穹 mPrimary->setSkyBox(true, "Examples/SpaceSkyBox"); mSecondary->setSkyDome(true, "Examples/CloudySky", 5, 8); } void createFrameListener(void) { // 创建帧监听器 mFrameListener = new SMTutorialListener(mWindow, mPrimary, mSecondary);// 传入两个场景管理器 mFrameListener->showDebugOverlay(true); mRoot->addFrameListener(mFrameListener); } }; #if OGRE_PLATFORM == OGRE_PLATFORM_WIN32 #define WIN32_LEAN_AND_MEAN #include "windows.h" INT WINAPI WinMain(HINSTANCE hInst, HINSTANCE, LPSTR strCmdLine, INT) #else int main(int argc, char **argv) #endif { // Create application object SMTutorialApplication app; try { app.go(); } catch(Exception& e) { #if OGRE_PLATFORM == OGRE_PLATFORM_WIN32 MessageBoxA(NULL, e.getFullDescription().c_str(), "An exception has occurred!", MB_OK | MB_ICONERROR | MB_TASKMODAL); #else fprintf(stderr, "An exception has occurred: %s/n", e.getFullDescription().c_str()); #endif } return 0; }