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source: osgVisual/trunk/include/distortion/visual_distortion.h @ 188

Last change on this file since 188 was 175, checked in by Torben Dannhauer, 14 years ago

File size: 13.8 KB

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1	#pragma once
2	/* --c++-- osgVisual - Copyright (C) 2009-2010 Torben Dannhauer
3	*
4	* This library is based on OpenSceneGraph, open source and may be redistributed and/or modified under
5	* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
6	* (at your option) any later version. The full license is in LICENSE file
7	* included with this distribution, and on the openscenegraph.org website.
8	*
9	* osgVisual requires for some proprietary modules a license from the correspondig manufacturer.
10	* You have to aquire licenses for all used proprietary modules.
11	*
12	* This library is distributed in the hope that it will be useful,
13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15	* OpenSceneGraph Public License for more details.
16	*/
17
18	#include <osg/NodeCallback>
19	#include <osg/Node>
20	#include <osg/Geode>
21	#include <osg/Geometry>
22	#include <osg/Texture2D>
23	#include <osg/TextureRectangle>
24	#include <osg/Notify>
25	#include <osg/Referenced>
26
27	#include <osgViewer/Viewer>
28
29	#include <osgDB/ReadFile>
30	#include <osgDB/FileUtils>
31
32	#include <osgGA/GUIEventHandler>
33	#include <osgGA/GUIActionAdapter>
34
35	#include <visual_util.h>
36
37	#include <string>
38	#include <iostream>
39	#include <fstream>
40
41	// XML Parser
42	#include <stdio.h>
43	#include <libxml/parser.h>
44	#include <libxml/tree.h>
45
46
47	namespace osgVisual
48	{
49
50
51	//class CameraConfigParser;
52
53	/**
54	* \brief This class distorts and blends the rendered image for projection in curved screens and multi channel setups.
55	*
56	* @todo Distortion algorithm seems to be erronous, small artefact lines are visible.
57	*
58	* @author Torben Dannhauer
59	* @date Jul 2009
60	*/
61	class visual_distortion : public osg::Node
62	{
63	#include <leakDetection.h>
64	public:
65	/**
66	* \brief Constructor
67	*
68	*/
69	visual_distortion(osgViewer::Viewer* viewer_, osg::ArgumentParser& arguments_, std::string configFileName);
70
71	/**
72	* \brief Destructor
73	*
74	*/
75	virtual ~visual_distortion(void);
76
77	/**
78	* \brief This function parses the XML config file for distortion relevant parameters.
79	*
80	* @return : True if parsing was successful.
81	*/
82	bool processXMLConfiguration();
83
84	/**
85	* \brief This function initializes the distortion node and creates the distortion camera and scene graph.
86	*
87	* @param subgraph : Undistorted scene graph.
88	* @param clearColor : Clear color for distortion.
89	* @return : Group node which contains the distortion and the undistorted scene graph ( distortedGraph ).
90	*/
91	osg::Group* initialize(osg::Group* subgraph, const osg::Vec4& clearColor );
92
93	/**
94	* \brief This function shuts the distortion module down.
95	*
96	*/
97	void shutdown();
98
99	/**
100	* \brief This function enabels or disables the distortion
101	*/
102	void toggleDistortion();
103
104	/**
105	* \brief This functions returns a pointer to the scene camera, which renders the undistorted scene (PRE_RENDER).
106	*
107	* @return Pointer to the scene camera.
108	*/
109	osg::Camera* getSceneCamera() {return sceneCamera;};
110
111	/**
112	* \brief This function returns the distortedSceneGraph if the distortion module is initialized.
113	*
114	* @return NULL if not Initialized, Otherwith the distorted sceneGraph.
115	*/
116	osg::Group* getDistortedSceneGraph() { if(initialized) return distortedGraph; else return NULL;};
117
118	/**
119	* \brief The function returns the frustum values which are parsed by the nested cameraConfigParser class.
120	*
121	* @return : Vector of double values which represent the frustum dataset. The order is the standart glu order.
122	*/
123	std::vector<double> getFrustumDataset() {return parser->getFrustumDataset();};
124
125	/**
126	* \brief This function returns the retation values for the rendering camera for XYZ axis in degree.
127	*
128	* @return : Vector of double values which represent the rotation values for XYZ axis in degree.
129	*/
130	std::vector<double> getRotationDataset() {return parser->getRotationDataset();};
131
132	/**
133	* \brief This function returns the translation values for the rendering camera along the XYZ axis in meter.
134	*
135	* @return : Vector of double values which represent the translation values for XYZ axis in meter.
136	*/
137	std::vector<double> getTranslationDataset() {return parser->getTranslationDataset();};
138
139	private:
140	/**
141	* \brief Callback class for update callback.
142	*
143	* This nested class is used for updating the distortion node every frame by installing this class as updateCallback for the distortion node.
144	* @author Torben Dannhauer
145	* @date Jul 2009
146	*/
147	class distortionUpdateCallback : public osg::NodeCallback
148	{
149	public:
150	/**
151	* \brief Constructor, for setting the member variables.
152	*
153	* @param viewer_ : Pointer to the viewer.
154	* @param sceneCamera_ : Pointer to the scene camera.
155	*/
156	distortionUpdateCallback(osgViewer::Viewer* viewer_, osg::Camera* sceneCamera_)
157	: viewer(viewer_), sceneCamera(sceneCamera_) {};
158
159	/**
160	* \brief This function is executed as callback during update traversal.
161	*
162	*/
163	virtual void operator()(osg::Node* node, osg::NodeVisitor* nv);
164	private:
165	/**
166	* Referenced Pointer to the applications viewer.
167	*/
168	osg::ref_ptr<osgViewer::Viewer> viewer;
169
170	/**
171	* Referenced Pointer to the scene camera.
172	*/
173	osg::ref_ptr<osg::Camera> sceneCamera;
174	};
175
176	/**
177	* \brief This nested class is a keyboard event adapter which allows distortion toggle. It never blocks the key event, therefore multiple events on a single key are possible.
178	*
179	* @author Torben Dannhauer
180	* @date Jul 2009
181	*/
182	class ToggleDistortionKBEventHandler : public osgGA::GUIEventHandler
183	{
184	public:
185	/**
186	* \brief Constructor
187	*
188	* @param distortion_ : Pointer to the distortion class.
189	* @param viewer_ : Reference to the applications viewer.
190	*/
191	ToggleDistortionKBEventHandler(visual_distortion* distortion_): distortion(distortion_) {}
192
193	/**
194	* \brief This function is executed if an keyboard event appears
195	*
196	* @param ea : GUI event adapter.
197	* @param : GUI action adapter.
198	* @return : Returns always false to pass the event to other event adapter if installed.
199	*/
200	virtual bool handle(const osgGA::GUIEventAdapter& ea,osgGA::GUIActionAdapter&)
201	{
202	if ( ea.getEventType() == osgGA::GUIEventAdapter::KEYDOWN && ea.getKey() == 'd' )
203	{
204	distortion->toggleDistortion();
205	return false;
206	}
207	else
208	return false; // return false means: hand over the event to the next Eventhandler. True means: absorb the event.
209	}
210
211	private:
212	/**
213	* Pointer to he distortion class. INside this EventHandler a Referenced Pointer ist _NOT_ used,
214	* because a circulare reference (distortion->kBEventHandler, kbEventHandler->distortion) would block both pointer to unref.
215	*/
216	visual_distortion* distortion;
217	};
218
219	/**
220	* \brief This nested class reads the Projection Designer's project file and extracts the frustum, translation and rotation values
221	*
222	* @author Torben Dannhauer
223	* @date Aug 2009
224	*/
225	class CameraConfigParser : public osg::Referenced
226	{
227	public:
228	CameraConfigParser(void)
229	{
230	configParsed = false;
231	frustumValues.clear();
232	rotationValues.clear();
233	rotationValues.resize(3,0);
234	translationValues.clear();
235	translationValues.resize(3,0);
236	}
237
238	virtual ~CameraConfigParser(void) {};
239
240	bool parseConfigFile(const char * filename)
241	{
242	if (! osgDB::fileExists(filename) )
243	{
244	OSG_NOTIFY( osg::FATAL ) << "ERROR: File '" << filename << "' does not exist." << std::endl;
245	return false;
246	}
247
248	frustumValues.clear();
249	rotationValues.clear();
250	rotationValues.resize(3,0);
251	translationValues.clear();
252	translationValues.resize(3,0);
253
254	std::string line;
255	std::ifstream configFile (filename);
256
257	if (configFile.is_open())
258	{
259	while (! configFile.eof() )
260	{
261	getline (configFile,line);
262	//cout << line << endl;
263
264	// Auf Frustum untersuchen
265	if( line.find("Frustum") != std::string::npos )
266	{
267	extractFrustum(line);
268	}
269
270	// Auf Rotation untersuchen
271	if( line.find("Rotate") != std::string::npos )
272	{
273	extractRotation(line);
274	}
275
276	// Auf Translation untersuchens
277	if( line.find("Translate") != std::string::npos )
278	{
279	extractTranslation(line);
280	}
281
282	}
283	configFile.close();
284	configParsed = true;
285	return true;
286	}
287	else
288	{
289	OSG_NOTIFY( osg::FATAL ) << "Unable to open file:" << filename << std::endl;
290	frustumValues.clear();
291	configParsed = false;
292	return false;
293	}
294	}
295
296	bool extractFrustum(std::string data_)
297	{
298	data_.replace(0,16,""); // Delete leading spaces and "Frustum"
299	data_.replace(data_.length()-1,1,""); // Delete trailing ";"
300	for( int i=0; i<6; i++)
301	{
302	size_t pos = data_.find(" "); // Position of first value in string
303	if( pos == -1) pos = data_.length();
304	frustumValues.push_back( atof( data_.substr(0, pos).data() ) );
305	data_.replace(0,pos+1,"");
306	}
307	return true;
308	}
309
310	bool extractRotation(std::string data_)
311	{
312	data_.replace(0,15,""); // Delete leading spaces and "Rotate"
313	data_.replace(data_.length()-1,1,""); // Delete trailing ";"
314
315	size_t valuePos = data_.find(" "); // First Value is RotationValue
316	std::string axis = data_.substr( valuePos+1);
317	switch(axis.find("1"))
318	{
319	case 0: rotationValues[0] = atof( data_.substr(0, valuePos).data() ); // X-Axis
320	break;
321	case 2: rotationValues[1] = atof( data_.substr(0, valuePos).data() ); // Y-Axis
322	break;
323	case 4: rotationValues[2] = atof( data_.substr(0, valuePos).data() ); // Z-Axis
324	break;
325	};
326	return true;
327	}
328
329	bool extractTranslation(std::string data_)
330	{
331	data_.replace(0,18,""); // Delete leading spaces and "Translate"
332	data_.replace(data_.length()-1,1,""); // Delete trailing ";"
333	for( unsigned int i=0;i<translationValues.size(); i++)
334	{
335	size_t valuePos = data_.find(" ");
336	std::string value = data_.substr(0, valuePos);
337	data_.replace(0,valuePos+1,"");
338	translationValues[i] = atof( value.data() );
339	}
340	return true;
341	}
342
343	std::vector<double> getFrustumDataset() {return(frustumValues);}
344
345	std::vector<double> getRotationDataset() {return(rotationValues);}
346
347	std::vector<double> getTranslationDataset() {return(translationValues);}
348
349	bool isConfigParsed() {return configParsed;};
350	private:
351	bool configParsed;
352	std::vector<double> frustumValues;
353	std::vector<double> rotationValues;
354	std::vector<double> translationValues;
355	};
356
357
358
359	/**
360	* Updatecallback as member variable of this class.
361	*/
362	osg::ref_ptr<distortionUpdateCallback> updateCallback;
363
364	/**
365	* Keyboard Eventhandler for distortion toggle.
366	*/
367	//osg::ref_ptr<ToggleDistortionKBEventHandler> kBEventHandler;
368	ToggleDistortionKBEventHandler* kBEventHandler;
369
370	/**
371	* \brief This functions creates the distortion environment.
372	*
373	* @param subgraph : Undistorted scene graph to distort.
374	* @param clearColor : OpenGL clear color to use for the distortion.
375	* @return : Group node which contains the distortion and the undistorted scene graph.
376	*/
377	osg::Group* createPreRenderSubGraph(osg::Group* subgraph, const osg::Vec4& clearColor );
378
379	/**
380	* \brief This function loads a shader source file
381	*
382	* @param shader : Shader to load source in
383	* @param fileName : Filename of shader source file.
384	* @return : Returns true if successful.
385	*/
386	bool loadShaderSource( osg::Shader* shader, const std::string& fileName );
387
388	/**
389	* \brief This function loads a shader Texture file
390	*
391	* @param fileName : Texture file to load.
392	* @return : Returns the loaded Texture.
393	*/
394	osg::Texture* loadTexture( const std::string& fileName );
395
396	/**
397	* Referenced Pointer to the loaded distortion Map
398	*/
399	osg::ref_ptr<osg::Texture> distortMapTexture;
400
401	/**
402	* Referenced Pointer to the loaded blend map
403	*/
404	osg::ref_ptr<osg::Texture> blendMapTexture;
405
406
407	/**
408	* Flag which indicates the initialization status
409	*/
410	bool initialized;
411
412	/**
413	* Flag that indicates if distortion is actually enabled. This is imported for the toggleDistortion() function.
414	*/
415	bool distortionEnabled;
416
417	/**
418	* Reference pointer to the distorted scene graph.
419	*/
420	osg::ref_ptr<osg::Group> distortedGraph;
421
422	/**
423	* Reference pointer to the undistorted scene graph.
424	*/
425	osg::ref_ptr<osg::Group> cleanGraph;
426
427	/**
428	* Reference pointer to the scen camera (PRE_RENDER)
429	*/
430	osg::ref_ptr<osg::Camera> sceneCamera;
431
432	/**
433	* Referenced pointer to the main applications viewer
434	*/
435	osg::ref_ptr<osgViewer::Viewer> viewer;
436
437	/**
438	* Parser object for parsing the camera configuration file which controlls frustum and camera PAT
439	*/
440	osg::ref_ptr<CameraConfigParser> parser;
441
442	/**
443	* Texture width for render to texture (RTT).
444	*/
445	unsigned tex_width;
446
447	/**
448	* Texture height for using render to texture (RTT).
449	*/
450	unsigned tex_height;
451
452	/**
453	* Indicates of texture rectangle should be used.
454	*/
455	bool useTextureRectangle;
456
457	/**
458	* Indicates if shader distortion should be used.
459	*/
460	bool useShaderDistortion;
461
462	/**
463	* Indicates if high definition rendering shold be used.
464	*/
465	bool useHDR;
466
467	/**
468	* Filename of the distorion map.
469	*/
470	std::string distortMapFileName;
471
472	/**
473	* Filename of the blend map.
474	*/
475	std::string blendMapFileName;
476
477	/**
478	* XML config filename
479	*/
480	std::string configFileName;
481
482	/**
483	* Target implementation which should be used to distort.
484	*/
485	osg::Camera::RenderTargetImplementation renderImplementation;
486
487	/**
488	* Reference to the global ArgumentParser. The arguments are required to add the help entry for the toggle distortion key. All other configuration is located in the XML file.
489	*/
490	osg::ArgumentParser& arguments;
491	};
492
493	} // END NAMESPACE

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