求教：漫游器问题

xuliezjq

1. void myViewer::Init()
   
2. {
   
3. osg::ref_ptr<osgGA::GUIEventAdapter> initEvent = _eventQueue->createEvent();
   
4. initEvent->setEventType(osgGA::GUIEventAdapter::FRAME);
   
5. 
   
6. if (_cameraManipulator.valid())
   
7. {
   
8. _cameraManipulator->init(*initEvent, *this);
   
9. }
   
10. }
    
11. 
    
12. myViewer::~myViewer(void)
    
13. {
    
14. }
    
15. 
    
16. 
    
17. void myViewer::addViewport(osg::Node* rootnode,float x /* = 0.0 */, float y /* = 0.0 */, float width /* = 1.0 */, float
    
18. 
    
19. height /* = 1.0 */)
    
20. {
    
21. osgUtil::SceneView *sceneView = new osgUtil::SceneView(_displaySettings.get());
    
22. //sceneView->setDefaults();
    
23. sceneView->setSceneData(rootnode);
    
24. if (_cameraManipulator.valid())
    
25. {
    
26. _cameraManipulator->setNode(rootnode);
    
27. osg::ref_ptr<osgGA::GUIEventAdapter> ea = _eventQueue->createEvent();
    
28. _cameraManipulator->home(*ea,*this);
    
29. }
    
30. sceneView->getCamera()->addChild(rootnode);
    
31. 
    
32. return addViewport( sceneView, x, y, width, height );
    
33. }
    
34. 
    
35. void myViewer::addViewport(osgUtil::SceneView* sv, float x /* = 0.0 */, float y /* = 0.0 */, float width /* = 1.0 */, float
    
36. 
    
37. height /* = 1.0 */)
    
38. {
    
39. _signalViewport.sceneView = sv;
    
40. _signalViewport.viewport[0] = x;
    
41. _signalViewport.viewport[1] = y;
    
42. _signalViewport.viewport[2] = width;
    
43. _signalViewport.viewport[3] = height;
    
44. 
    
45. }
    
46. 
    
47. 
    
48. void myViewer::updateSceneView(osgUtil::SceneView* sceneView)
    
49. {
    
50. osg::Camera* masterCamera = _signalViewport.sceneView->getCamera();
    
51. osg::StateSet* stateset = masterCamera->getOrCreateStateSet();
    
52. 
    
53. if (sceneView->getGlobalStateSet()!=stateset)
    
54. {
    
55. sceneView->setGlobalStateSet(stateset);
    
56. }
    
57. 
    
58. osg:isplaySettings* ds = osg:isplaySettings::instance();
    
59. sceneView->setDisplaySettings(ds);
    
60. }
    
61. 
    
62. void myViewer::signalupdate()
    
63. {
    
64. _updateVisitor->reset();
    
65. _updateVisitor->setFrameStamp(getFrameStamp());
    
66. _updateVisitor->setTraversalNumber(getFrameStamp()->getFrameNumber());
    
67. 
    
68. getSceneView()->update();
    
69. 
    
70. if (_cameraManipulator.valid())
    
71. {
    
72. getSceneView()->getCamera()->setViewMatrix(_cameraManipulator->getInverseMatrix());
    
73. }
    
74. }
    
75. 
    
76. 
    
77. void myViewer::signalcull()
    
78. {
    
79. // do cull traversal.
    
80. updateSceneView(getSceneView());
    
81. getSceneView()->cull();
    
82. }
    
83. 
    
84. 
    
85. void myViewer::signaldraw()
    
86. {
    
87. 
    
88. // do draw traversal.
    
89. getSceneView()->draw();
    
90. 
    
91. }
    
92. 
    
93. void myViewer::setSceneData(osg::Node* node)
    
94. {
    
95. if (node == getSceneView()->getSceneData())
    
96. return;
    
97. getSceneView()->setSceneData(node);
    
98. if (_cameraManipulator.valid())
    
99. {
    
100. _cameraManipulator->setNode(node);
     
101. osg::ref_ptr<osgGA::GUIEventAdapter> ea = new osgGA::GUIEventAdapter;
     
102. _cameraManipulator->home(*ea,*this);
     
103. }
     
104. getSceneView()->getCamera()->addChild(node);
     
105. }
     
106. 
     
107. void myViewer:pen()
     
108. {
     
109. osgUtil::SceneView* sceneView = _signalViewport.sceneView.get();
     
110. int view[4] = { int(_signalViewport.viewport[0]*_ww), int(_signalViewport.viewport[1]*_wh),
     
111. int(_signalViewport.viewport[2]*_ww), int(_signalViewport.viewport[3]*_wh) };
     
112. 
     
113. sceneView->getCamera()->setClearMask(GL_DEPTH_BUFFER_BIT);
     
114. 
     
115. sceneView->setViewport(view[0], view[1], view[2], view[3]);
     
116. 
     
117. const osg:isplaySettings* vs = sceneView->getDisplaySettings();
     
118. if (vs)
     
119. {
     
120. _displaySettings->merge(*vs);
     
121. }
     
122. else
     
123. {
     
124. // one does not already exist so attach the viewers visualsSettins to the SceneView
     
125. sceneView->setDisplaySettings(_displaySettings.get());
     
126. }
     
127. 
     
128. osgUtil:isplayRequirementsVisitor drv;
     
129. drv.setDisplaySettings(_displaySettings.get());
     
130. osg::Node* node = sceneView->getSceneData();
     
131. if (node) node->accept(drv);
     
132. 
     
133. osg::StateSet* stateset = sceneView->getCamera()->getOrCreateStateSet();
     
134. 
     
135. sceneView->setGlobalStateSet(stateset);
     
136. sceneView->setDefaults();
     
137. }
     
138. 
     
139. void myViewer::signalrun()
     
140. {
     
141. if (_firstFrame)
     
142. {
     
143. Init();
     
144. _firstFrame = false;
     
145. 
     
146. }
     
147. eventTraversal();
     
148. signalupdate();
     
149. signalcull();
     
150. signaldraw();
     
151. }
     
152. 
     
153. void myViewer::addMatrixManipulator(osgGA::MatrixManipulator *manipulator)
     
154. {
     
155. _cameraManipulator = manipulator;
     
156. if (_cameraManipulator.valid())
     
157. {
     
158. if (getSceneView()->getSceneData())
     
159. {
     
160. _cameraManipulator->setNode(getSceneView()->getSceneData());
     
161. }
     
162. osg::ref_ptr<osgGA::GUIEventAdapter> dummyEvent = _eventQueue->createEvent();
     
163. _cameraManipulator->home(*dummyEvent,*this);
     
164. }
     
165. }
     
166. 
     
167. 
     
168. void myViewer::prependEventHandler(osgGA::GUIEventHandler* handler,unsigned int viewport)
     
169. {
     
170. ViewportDef &viewp = _signalViewport;
     
171. viewp._eventHandlerList.push_front( handler );
     
172. }
     
173. 
     
174. void myViewer::appendEventHandler(osgGA::GUIEventHandler* handler,unsigned int viewport)
     
175. {
     
176. ViewportDef &viewp = _signalViewport;
     
177. viewp._eventHandlerList.push_back( handler );
     
178. 
     
179. }
     
180. 
     
181. 
     
182. void myViewer::resized(int x, int y, int width, int height)
     
183. {
     
184. }
     
185. 
     
186. 
     
187. void myViewer::transformMouseXY(float &x, float &y)
     
188. {
     
189. if (_eventQueue->getUseFixedMouseInputRange())
     
190. {
     
191. osgGA::GUIEventAdapter* eventState = _eventQueue->getCurrentEventState();
     
192. x = eventState->getXmin() + (eventState->getXmax()-eventState->getXmin())*x/float(_ww);
     
193. y = eventState->getYmin() + (eventState->getYmax()-eventState->getYmin())*y/float(_wh);
     
194. }
     
195. }
     
196. 
     
197. void myViewer::fullscreen()
     
198. {
     
199. }
     
200. 
     
201. 
     
202. void myViewer::eventTraversal()
     
203. {
     
204. osgGA::EventQueue::Events events;
     
205. _eventQueue->frame(getFrameStamp()->getReferenceTime());
     
206. if(_eventQueue->takeEvents(events))
     
207. {
     
208. ishaveEvents = false;
     
209. return;
     
210. }
     
211. 
     
212. if (_eventVisitor.valid() && getSceneView()->getSceneData())
     
213. {
     
214. _eventVisitor->setFrameStamp(getFrameStamp());
     
215. _eventVisitor->setTraversalNumber(getFrameStamp()->getFrameNumber());
     
216. 
     
217. for (osgGA::EventQueue::Events::iterator itr = events.begin();
     
218. itr != events.end();++itr)
     
219. {
     
220. osgGA::GUIEventAdapter *event = itr->get();
     
221. _eventVisitor->reset();
     
222. _eventVisitor->addEvent(event);
     
223. 
     
224. getSceneView()->getSceneData()->accept(*_eventVisitor);
     
225. osg::NodeVisitor::TraversalMode tm = _eventVisitor->getTraversalMode();
     
226. _eventVisitor->setTraversalMode(osg::NodeVisitor::TRAVERSE_NONE);
     
227. 
     
228. if (getSceneView()->getCamera() &&
     
229. getSceneView()->getCamera()->getEventCallback())
     
230. {
     
231. getSceneView()->getCamera()->accept(*_eventVisitor);
     
232. }
     
233. 
     
234. _eventVisitor->setTraversalMode(tm);
     
235. }
     
236. }
     
237. 
     
238. for(osgGA::EventQueue::Events::iterator itr = events.begin();
     
239. itr != events.end();
     
240. ++itr)
     
241. {
     
242. osgGA::GUIEventAdapter* event = itr->get();
     
243. 
     
244. for(EventHandlerList::iterator hitr = _signalViewport._eventHandlerList.begin();
     
245. hitr != _signalViewport._eventHandlerList.end();
     
246. ++hitr)
     
247. {
     
248. (*hitr)->handle(*event,*this);
     
249. }
     
250. 
     
251. }
     
252. 
     
253. for(osgGA::EventQueue::Events::iterator itr = events.begin();
     
254. itr != events.end();
     
255. ++itr)
     
256. {
     
257. osgGA::GUIEventAdapter* event = itr->get();
     
258. if (_cameraManipulator.valid())
     
259. {
     
260. //_cameraManipulator->handleWithCheckAgainstIgnoreHandledEventsMask( *event, *this);
     
261. _cameraManipulator->handle(*event,*this);
     
262. }
     
263. }
     
264. }
     
265. 
     
266. 
     
267. 
     
268. void myViewer::mouseMove(float x, float y)
     
269. {
     
270. RECT rect;
     
271. ::GetWindowRect(_windowHandle,&rect);
     
272. InvalidateRect(_windowHandle,&rect,true);
     
273. osg::Camera* camera = getSceneView()->getCamera();
     
274. osg::Viewport* viewport = camera->getViewport();
     
275. //
     
276. camera->getProjectionMatrix() *= osg::Matrix::rotate(10.0,0.0,0.0,1.0);
     
277. //camera->getProjectionMatrix() *= osg::Matrix::scale(1.0/4.0,1.0,1.0);
     
278. camera->setViewport(new osg::Viewport(0, 0, 1024, 768));
     
279. 
     
280. UpdateWindow(_windowHandle);
     
281. }
     
282. 
     
283. 
     
284. LRESULT myViewer::handleNativeWindowingEvent( HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam )
     
285. {
     
286. double eventTime = getEventQueue()->getTime();
     
287. switch (uMsg)
     
288. {
     
289. case WM_LBUTTONDOWN:
     
290. {
     
291. ::SetCapture(_windowHandle);
     
292. int button;
     
293. 
     
294. button = 1;
     
295. 
     
296. float mx = GET_X_LPARAM(lParam);
     
297. float my = GET_Y_LPARAM(lParam);
     
298. transformMouseXY(mx, my);
     
299. getEventQueue()->mouseButtonPress(mx, my, button, eventTime);
     
300. //mouseMove(mx,my);
     
301. 
     
302. }
     
303. break;
     
304. case WM_LBUTTONUP:
     
305. 
     
306. {
     
307. ::ReleaseCapture();
     
308. 
     
309. int button;
     
310. button = 1;
     
311. float mx = GET_X_LPARAM(lParam);
     
312. float my = GET_Y_LPARAM(lParam);
     
313. 
     
314. transformMouseXY(mx,my);
     
315. getEventQueue()->mouseButtonRelease(mx,my,button,eventTime);
     
316. 
     
317. }
     
318. 
     
319. break;
     
320. }
     
321. return ::CallWindowProc(_windowProcedure, hwnd, uMsg, wParam, lParam);
     
322. }
     

复制代码

这是我源码的主要部分，但是我在应用程序中
addMatrixManipulator(new osgGA::TrackballManipulator)后，漫游器不响应
但是当我用例如源码中的mouseMove（float , float）函数那样操作sceneView的相机后，确能响应。
求高人指点。。。。。

tianxiao888

if (_cameraManipulator.valid())

{

getSceneView()->getCamera()->setViewMatrix(_cameraManipulator->getInverseMatrix());

}
你这段代码啥意思？？你操作器的操作都给抵消了

xuliezjq

用漫游器的姿态矩阵去更新主相机的视图矩阵。。。。。。
您觉得该怎么改呢？

array

只需要重写Manipulator的getMatrix函数就可以了，它会自动被系统内部调用