【笔记】九、动画、两点间移动、四元数

class MoveDemoListener : public ExampleFrameListener{public: MoveDemoListener(RenderWindow* win, Camera* cam, SceneNode *sn, Entity *ent, deque<Vector3> &walk) : ExampleFrameListener(win, cam, false, false), mNode(sn), mEntity(ent), mWalkList( walk ) { // 设置idle动画 //mAnimationState = ent->getAnimationState("Idle");// 从实体中获取到了AnimationState,每个mesh都有它们自己定义的动画集。为了能够查看某个mesh的全部动画，需要下载OgreMeshViewer才能看到。 //mAnimationState->setLoop(true);// 让动画不停地循环 //mAnimationState->setEnabled(true);// 把这个动画真正激活 mWalkSpeed = 35.0f;// 设置移动速度 mDirection = Vector3::ZERO;// 移动方向 mDestination = mWalkList.front(); // 取得队头的值 mWalkList.pop_front(); // 删除队头的元素 //mDirection = mDestination - mNode->getPosition(); //mDistance = mDirection.normalise(); //Vector3 src = mNode->getOrientation() * Vector3::UNIT_X; //if ((1.0f + src.dotProduct(mDirection)) < 0.0001f) //{ // mNode->yaw(Degree(180)); //} //else //{ // Ogre::Quaternion quat = src.getRotationTo(mDirection); // mNode->rotate(quat); //} // else } // MoveDemoListener /* This function is called to start the object moving to the next position in mWalkList. */ bool nextLocation( ) { if (mWalkList.empty()) return false; mDestination = mWalkList.front(); // this gets the front of the deque mWalkList.pop_front(); // this removes the front of the deque mDirection = mDestination - mNode->getPosition(); mDistance = mDirection.normalise(); return true; } // nextLocation( ) bool frameStarted(const FrameEvent &evt) { if (mDirection == Vector3::ZERO) { if (nextLocation()) { // 同前 mAnimationState = mEntity->getAnimationState("Walk"); mAnimationState->setLoop(true); mAnimationState->setEnabled(true); } else { Real move = mWalkSpeed * evt.timeSinceLastFrame; mDistance -= move;// 距离目标的距离减少 if (mDistance <= 0.0f) { mNode->setPosition(mDestination); mDirection = Vector3::ZERO; // Set animation based on if the robot has another point to walk to. if (! nextLocation()) { // 同前 mAnimationState = mEntity->getAnimationState("Idle"); mAnimationState->setLoop(true); mAnimationState->setEnabled(true); } else { // Rotation Code will go here later Vector3 src = mNode->getOrientation() * Vector3::UNIT_X; if ((1.0f + src.dotProduct(mDirection)) < 0.0001f) { mNode->yaw(Degree(180)); } else { Ogre::Quaternion quat = src.getRotationTo(mDirection); mNode->rotate(quat); } // else } } else { mNode->translate(mDirection * move); } // else } // if } mAnimationState->addTime(evt.timeSinceLastFrame); return ExampleFrameListener::frameStarted(evt); }protected: Real mDistance; // 本次行走到达目的地的距离 Vector3 mDirection; // 对象移动的方向 Vector3 mDestination; // 对象移动到目的地的距离 AnimationState *mAnimationState; // 对象当前的动画状态 Entity *mEntity; // The Entity we are animating SceneNode *mNode; // The SceneNode that the Entity is attached to std::deque<Vector3> mWalkList; // The list of points we are walking to Real mWalkSpeed; // 对象移动的速度};class MoveDemoApplication : public ExampleApplication{protected:public: MoveDemoApplication() { } ~MoveDemoApplication() { }protected: Entity *mEntity; // The entity of the object we are animating SceneNode *mNode; // The SceneNode of the object we are moving std::deque<Vector3> mWalkList; // A deque containing the waypoints void createScene(void) { // 环境光，高亮 mSceneMgr->setAmbientLight( ColourValue( 1.0f, 1.0f, 1.0f ) ); // 创建机器人实体 mEntity = mSceneMgr->createEntity( "Robot", "robot.mesh" ); // 创建场景结点 mNode = mSceneMgr->getRootSceneNode( )->createChildSceneNode( "RobotNode", Vector3( 0.0f, 0.0f, 25.0f ) ); // 加入机器人 mNode->attachObject( mEntity ); // 加入行走位置列表 mWalkList.push_back( Vector3( 550.0f, 0.0f, 50.0f ) ); mWalkList.push_back( Vector3(-100.0f, 0.0f, -200.0f ) ); // 创建三个实体，用来作为行走的参考物 Entity *ent; SceneNode *node; ent = mSceneMgr->createEntity( "Knot1", "knot.mesh" ); node = mSceneMgr->getRootSceneNode( )->createChildSceneNode( "Knot1Node", Vector3( 0.0f, -10.0f, 25.0f ) ); node->attachObject( ent ); node->setScale( 0.1f, 0.1f, 0.1f ); ent = mSceneMgr->createEntity( "Knot2", "knot.mesh" ); node = mSceneMgr->getRootSceneNode( )->createChildSceneNode( "Knot2Node", Vector3( 550.0f, -10.0f, 50.0f ) ); node->attachObject( ent ); node->setScale( 0.1f, 0.1f, 0.1f ); ent = mSceneMgr->createEntity( "Knot3", "knot.mesh" ); node = mSceneMgr->getRootSceneNode( )->createChildSceneNode( "Knot3Node", Vector3(-100.0f, -10.0f,-200.0f ) ); node->attachObject( ent ); node->setScale( 0.1f, 0.1f, 0.1f ); // 创建一个摄像机，方便观察机器人的行走 mCamera->setPosition( 90.0f, 280.0f, 535.0f ); mCamera->pitch( Degree(-30.0f) ); mCamera->yaw( Degree(-15.0f) ); } void createFrameListener(void) { // 添加监听器 mFrameListener= new MoveDemoListener(mWindow, mCamera, mNode, mEntity, mWalkList); mFrameListener->showDebugOverlay(true);// 显示帧频 mRoot->addFrameListener(mFrameListener);// 注册到Root结点 }};