路径动画判断到达终点的问题

wanglouji123

各位大牛，求指导：我在程序中加载了一个人物动画，我想在开始路径回调的时候播放动画，然后到达路径终点后停止动画，但是不知道如何判断节点是否到达路径终点！是要重写AnimationPathCallback，然后在里面加上判断条件？还是AnimationPathCallback本身就有方法判断已经到达终点？

1.         osg::AnimationPath* CreatePath()
   
2.         {
   
3.                 osg::Vec3 yoz(1.0,0.0,0.0),xoz(0.0,1.0,0.0),xoy(0.0,0.0,1.0);
   
4.                 osg::ref_ptr<osg::AnimationPath> path = new osg::AnimationPath;
   
5. 
   
6.                 path->insert(0.0,osg::AnimationPath::ControlPoint(osg::Vec3(0.0,0.0,0.0),osg::Quat(0.0,yoz,0.0,xoz,0.0,xoy)));
   
7.                 path->insert(2.0,osg::AnimationPath::ControlPoint(osg::Vec3(0.0,0.0,0.0),osg::Quat(osg::PI,yoz,0.0,xoz,0.0,xoy)));
   
8.                 path->insert(4.0,osg::AnimationPath::ControlPoint(osg::Vec3(0.0,0.0,0.0),osg::Quat(osg::PI,yoz,0.0,xoz,osg::PI,xoy)));
   
9.                 path->insert(6.0,osg::AnimationPath::ControlPoint(osg::Vec3(0.0,0.0,0.0),osg::Quat(0.0,yoz,0.0,xoz,osg::PI,xoy)));
   
10.                 path->insert(8.0,osg::AnimationPath::ControlPoint(osg::Vec3(0.0,0.0,0.0),osg::Quat(0.0,yoz,0.0,xoz,0.0,xoy)));
    
11. 
    
12.                 return path.release();
    
13.         }
    
14.        
    
15.         bool handle(const osgGA::GUIEventAdapter&ea,osgGA::GUIActionAdapter& aa)
    
16.         {
    
17.                 switch(ea.getEventType())
    
18.                 {
    
19.                 case osgGA::GUIEventAdapter::KEYDOWN:
    
20.                         {
    
21.                                 if (ea.getKey()=='w')
    
22.                                 {
    
23.                                         AnimationManagerFinder finder;
    
24.                                         node_walk->accept(finder);
    
25.                                         const osgAnimation::AnimationList& animations = finder._am->getAnimationList();
    
26.                                         finder._am->playAnimation( animations[0].get() );
    
27. 
    
28.                                         osg::AnimationPath* path = CreatePath();
    
29.                                         path->setLoopMode(osg::AnimationPath::NO_LOOPING);
    
30.                                         pat->setUpdateCallback(new osg::AnimationPathCallback(path));
    
31.                                 }
    
32.                         }
    
33.                         break;
    
34.                 default:
    
35.                         break;       
    
36.                 }
    
37.                 return false;
    
38.         }

复制代码

array

可以自己根据getAnimationTime()以及路径的最终时间来判断一下