source: osgVisual/src/distortion/visual_distortion.cpp @ 83

Last change on this file since 83 was 70, checked in by Torben Dannhauer, 14 years ago

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[31]1/* -*-c++-*- osgVisual - Copyright (C) 2009-2010 Torben Dannhauer
2 *
3 * This library is based on OpenSceneGraph, open source and may be redistributed and/or modified under
4 * the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
5 * (at your option) any later version.  The full license is in LICENSE file
6 * included with this distribution, and on the openscenegraph.org website.
7 *
8 * osgVisual requires for some proprietary modules a license from the correspondig manufacturer.
9 * You have to aquire licenses for all used proprietary modules.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14 * OpenSceneGraph Public License for more details.
15*/
16
17#include <visual_distortion.h>
18
19using namespace osgVisual;
20
21visual_distortion::visual_distortion(osgViewer::Viewer* viewer_, osg::ArgumentParser& arguments_) : viewer(viewer_), arguments(arguments_)
22{
23        OSG_NOTIFY (osg::ALWAYS ) << "visual_distortion instantiated." << std::endl;
24
25        initialized = false;
26        distortionEnabled = false;
27        parser = new CameraConfigParser();
28
29        distortedGraph = NULL;
30        cleanGraph = NULL;
31
32        distortMapTexture = NULL;
33        blendMapTexture = NULL;
34}
35
36visual_distortion::~visual_distortion(void)
37{
38        OSG_NOTIFY (osg::ALWAYS ) << "visual_distortion destroyed." << std::endl;
39}
40
41bool visual_distortion::processCommandlineparameters()
42{
43        arguments.getApplicationUsage()->addCommandLineOption("-C <channelname>","Setup the channel name, this is the preset for blendmap, distortionmap and camera configuration file.");
44        arguments.getApplicationUsage()->addCommandLineOption("--fbo","Use Frame Buffer Object for render to texture, where supported.");
45    arguments.getApplicationUsage()->addCommandLineOption("--fb","Use FrameBuffer for render to texture.");
46    arguments.getApplicationUsage()->addCommandLineOption("--pbuffer","Use Pixel Buffer for render to texture, where supported.");
47    arguments.getApplicationUsage()->addCommandLineOption("--window","Use a seperate Window for render to texture.");
48    arguments.getApplicationUsage()->addCommandLineOption("--width","Set the width of the render to texture.");
49    arguments.getApplicationUsage()->addCommandLineOption("--height","Set the height of the render to texture.");
50    arguments.getApplicationUsage()->addCommandLineOption("--texture-rectangle","Use osg::TextureRectangle for doing the render to texure to.");
51    arguments.getApplicationUsage()->addCommandLineOption("--distortionmap","Set a distortion map file name.");
52    arguments.getApplicationUsage()->addCommandLineOption("--blendmap","Set a blend map file name.");
53    arguments.getApplicationUsage()->addCommandLineOption("--shaderDistortion","Use OpenGL shader for distortion and blending.");
54        arguments.getApplicationUsage()->addKeyboardMouseBinding("d", "Toggle Distortion.");
55
56        // Read out Distortion CMDLine arguments
57        tex_width = 2048;
58    tex_height = 2048;
59    while (arguments.read("--width", tex_width)) {}
60    while (arguments.read("--height", tex_height)) {}
61
62        renderImplementation = osg::Camera::FRAME_BUFFER_OBJECT;
63
64    while (arguments.read("--fbo")) { renderImplementation = osg::Camera::FRAME_BUFFER_OBJECT; }
65    while (arguments.read("--pbuffer")) { renderImplementation = osg::Camera::PIXEL_BUFFER; }
66    while (arguments.read("--pbuffer-rtt")) { renderImplementation = osg::Camera::PIXEL_BUFFER_RTT; }
67    while (arguments.read("--fb")) { renderImplementation = osg::Camera::FRAME_BUFFER; }
68    while (arguments.read("--window")) { renderImplementation = osg::Camera::SEPERATE_WINDOW; }
69
70    useTextureRectangle = false;
71    while (arguments.read("--texture-rectangle")) { useTextureRectangle = true; }
72        useShaderDistortion = false;
73    while (arguments.read("--shaderDistortion")) { useShaderDistortion = true; }
74    useHDR = false; 
75    while (arguments.read("--hdr")) { useHDR = true; }
76
77        distortMapFileName = "..\\resources\\distortion\\distort_distDisabled.bmp";
78    while (arguments.read("--distortionmap", distortMapFileName)) { }
79        blendMapFileName = "..\\resources\\distortion\\blend_distDisabled.bmp";
80    while (arguments.read("--blendmap", blendMapFileName)) { }
81
82        std::string pre_cfg("..\\resources\\distortion\\view_");
83        std::string pre_distortion("..\\resources\\distortion\\distort_");
84        std::string pre_blend("..\\resources\\distortion\\blend_");
85        std::string post_cfg(".cfg");
86        std::string post_distortion(".bmp");
87        std::string post_blend(".bmp");
88        std::string channelname;
89        while (arguments.read("-C",channelname))
90        {
91                OSG_NOTIFY(osg::INFO) << "channelname:" << channelname << std::endl;
92                // load channel config
93                parser->parseConfigFile((pre_cfg+channelname+post_cfg).data());
94                // load channel blendmap
95                blendMapFileName = (pre_blend+channelname+post_blend).data();
96                // load channel distortionmap
97                distortMapFileName = (pre_distortion+channelname+post_distortion).data(); 
98                // set channel frustum
99                if( parser->isConfigParsed())
100                        viewer->getCamera()->setProjectionMatrixAsFrustum((parser->getFrustumDataset())[0], (parser->getFrustumDataset())[1], (parser->getFrustumDataset())[2], (parser->getFrustumDataset())[3], (parser->getFrustumDataset())[4], (parser->getFrustumDataset())[5]);
101                else
102                        OSG_NOTIFY(osg::WARN) << "WARNING: Unable to parse Frustum values from '" << pre_cfg<<channelname<<post_cfg << "' -- continue without valid frustum values." << std::endl;
103        }
104
105         // report any errors if they have occurred when parsing the program arguments.
106    if (arguments.errors())
107    {
108        arguments.writeErrorMessages(std::cout);
109                exit(1);
110    }
111        return true;
112}
113
114osg::Group* visual_distortion::initialize(osg::Group* subgraph, const osg::Vec4& clearColor )
115{
116        OSG_NOTIFY (osg::ALWAYS ) << "visual_distortion initialize..." << std::endl;
117
118        // Process Commandline arguments:
119        processCommandlineparameters();
120
121        // Add this node to the scenegraph to get updated during update traversal.
122        subgraph->addChild( this );
123
124        // add the keyboard handler for toggle distortion
125        kBEventHandler = new ToggleDistortionKBEventHandler( this );
126        viewer->addEventHandler( kBEventHandler );
127
128        cleanGraph = subgraph;
129        distortedGraph = createPreRenderSubGraph( subgraph, clearColor );
130
131        // Create and install updateCallback (to get called for copying the main cameras view matrixes to the PRE_RENDER camera)
132        // -- must be called _AFTER_ createPreRenderSubGraph() (necessary because sceneCamera is set by createPreRenderSubGraph())
133        updateCallback = new distortionUpdateCallback( viewer, sceneCamera );
134        this->setUpdateCallback( updateCallback );
135
136        // Note down state flags..
137        initialized = true;
138        distortionEnabled = true;
139
140        distortionEnabled = true;
141        viewer->setSceneData( distortedGraph );
142       
143        return distortedGraph;
144}
145
146void visual_distortion::shutdown()
147{
148        if(initialized)
149        {
150                // Remove this Node from scenegraph
151                cleanGraph->removeChild( this );
152
153                // Remove update callback
154                this->removeUpdateCallback( updateCallback );
155                updateCallback = NULL;
156
157                OSG_NOTIFY (osg::ALWAYS ) << "visual_distortion shutdown complete." << std::endl;
158        }
159}
160
161void visual_distortion::distortionUpdateCallback::operator()(osg::Node* node, osg::NodeVisitor* nv)
162{
163        // Copy Main Camera's matrixes to the PRE_RENDER Camera.
[70]164        std::cout << "distortion updatecallback" << std::endl;
[31]165        sceneCamera->setViewMatrix( viewer->getCamera()->getViewMatrix() );
166        sceneCamera->setProjectionMatrix( viewer->getCamera()->getProjectionMatrix() );
167}
168
169void visual_distortion::toggleDistortion()
170{
171        // Toggle
172        //// If not Distorted: enabled distortion
173        if( !distortionEnabled )
174        {
175                distortionEnabled = true;
176                viewer->setSceneData( distortedGraph );
177        }
178        else    // .. otherwise disable distortion
179        {
180                distortionEnabled = false;
181                viewer->setSceneData( cleanGraph );
182        }
183}
184
185
186osg::Group* visual_distortion::createPreRenderSubGraph(osg::Group* subgraph, const osg::Vec4& clearColor )
187{
188    if (!subgraph) return 0;
189
190    // create a group to contain the flag and the pre rendering camera.
191    osg::Group* parent = new osg::Group;
192
193    // texture to render to and to use for rendering of flag.
194    osg::Texture* texture = 0;
195    if (useTextureRectangle)
196    {
197        osg::TextureRectangle* textureRect = new osg::TextureRectangle;
198        textureRect->setTextureSize(tex_width, tex_height);
199        textureRect->setInternalFormat(GL_RGBA);
200        textureRect->setFilter(osg::Texture2D::MIN_FILTER,osg::Texture2D::LINEAR);
201        textureRect->setFilter(osg::Texture2D::MAG_FILTER,osg::Texture2D::LINEAR);
202       
203        texture = textureRect;
204    }
205    else
206    {
207        osg::Texture2D* texture2D = new osg::Texture2D;
208        texture2D->setTextureSize(tex_width, tex_height);
209        texture2D->setInternalFormat(GL_RGBA);
210        texture2D->setFilter(osg::Texture2D::MIN_FILTER,osg::Texture2D::LINEAR);
211        texture2D->setFilter(osg::Texture2D::MAG_FILTER,osg::Texture2D::LINEAR);
212       
213        texture = texture2D;
214    } 
215
216    if (useHDR)
217    {
218        texture->setInternalFormat(GL_RGBA16F_ARB);
219        texture->setSourceFormat(GL_RGBA);
220        texture->setSourceType(GL_FLOAT);
221    }
222
223    // load a distortion map texture file
224        if ( osgDB::fileExists( distortMapFileName ) )
225                distortMapTexture = loadTexture(distortMapFileName);
226        else
227        {
228                OSG_NOTIFY(osg::FATAL) << "ERROR: Distortionmap file'" << distortMapFileName << "' not found! Please change the channelname, filename or copy the desired file to the applications root folder!" << std::endl;
229                exit(-1);
230        }
231
232    // load a blend map texture file
233        if ( osgDB::fileExists( blendMapFileName ) )
234                blendMapTexture = loadTexture(blendMapFileName);
235        else
236        {
237                OSG_NOTIFY(osg::FATAL) << "ERROR: Blendmap file'" << blendMapFileName << "' not found! Please change the channelname, filename or copy the desired file to the applications root folder!" << std::endl;
238                exit(-1);
239        }
240
241    // set up the plane to render the rendered view.
242    {
243        // create the quad to visualize.
244        osg::Geometry* polyGeom = new osg::Geometry();
245
246        polyGeom->setSupportsDisplayList(false);
247
248        osg::Vec3 origin(0.0f,0.0f,0.0f);
249        osg::Vec3 xAxis(1.0f,0.0f,0.0f);
250        osg::Vec3 yAxis(0.0f,1.0f,0.0f);
251        osg::Vec3 zAxis(0.0f,0.0f,1.0f);
252        float height = 1024.0f;
253        float width = 1280.0f;
254        int noSteps = 128;
255        if (useShaderDistortion)
256            noSteps = 2;
257
258        osg::Vec3Array* vertices = new osg::Vec3Array;
259        osg::Vec2Array* texcoords = new osg::Vec2Array;
260        osg::Vec2Array* texcoords2 = useShaderDistortion?NULL:(new osg::Vec2Array);
261        osg::Vec4Array* colors = new osg::Vec4Array;
262
263        osg::Vec3 bottom = origin;
264        osg::Vec3 dx = xAxis*(width/((float)(noSteps-1)));
265        osg::Vec3 dy = yAxis*(height/((float)(noSteps-1)));
266
267        osg::Vec2 bottom_texcoord(0.0f,0.0f);
268        osg::Vec2 dx_texcoord(1.0f/(float)(noSteps-1),0.0f);
269        osg::Vec2 dy_texcoord(0.0f,1.0f/(float)(noSteps-1));
270
271        osg::Vec3 cursor = bottom;
272        osg::Vec2 texcoord = bottom_texcoord;
273        int i,j;
274        for(i=0;i<noSteps;++i)
275        {
276            osg::Vec3 cursor = bottom+dy*(float)i;
277            osg::Vec2 texcoord = bottom_texcoord+dy_texcoord*(float)i;
278            for(j=0;j<noSteps;++j)
279            {
280                vertices->push_back(cursor);
281                if (distortMapTexture && !useShaderDistortion)
282                {
283                    osg::Vec2 imgcoord = osg::Vec2((distortMapTexture->getImage(0)->s()-1) * texcoord.x(),
284                                                   (distortMapTexture->getImage(0)->t()-1) * texcoord.y());
285                    unsigned char* pPixel = &distortMapTexture->getImage(0)->data()[(int)imgcoord.y()*distortMapTexture->getImage(0)->getRowSizeInBytes()+
286                                                                                    (int)imgcoord.x()*distortMapTexture->getImage(0)->getPixelSizeInBits()/8];
287                    texcoords->push_back(osg::Vec2(((float)pPixel[2] / 255.0f + (pPixel[0] % 16)) / 16.0f,
288                                                   1.0f - ((float)pPixel[1] / 255.0f + (pPixel[0] / 16)) / 16.0f));
289                    texcoords2->push_back(osg::Vec2(texcoord.x(), texcoord.y()));
290                }
291                else
292                    texcoords->push_back(osg::Vec2(texcoord.x(), texcoord.y()));
293                colors->push_back(osg::Vec4(1.0f,1.0f,1.0f,1.0f));
294
295                cursor += dx;
296                texcoord += dx_texcoord;
297            }
298        }
299
300        // pass the created vertex array to the points geometry object.
301        polyGeom->setVertexArray(vertices);
302
303        polyGeom->setColorArray(colors);
304        polyGeom->setColorBinding(osg::Geometry::BIND_PER_VERTEX);
305        polyGeom->setTexCoordArray(0,texcoords);
306        if (!useShaderDistortion)
307            polyGeom->setTexCoordArray(2,texcoords2);
308
309        for(i=0;i<noSteps-1;++i)
310        {
311            osg::DrawElementsUShort* elements = new osg::DrawElementsUShort(osg::PrimitiveSet::QUAD_STRIP);
312            for(j=0;j<noSteps;++j)
313            {
314                elements->push_back(j+(i+1)*noSteps);
315                elements->push_back(j+(i)*noSteps);
316            }
317            polyGeom->addPrimitiveSet(elements);
318        }
319
320        // new we need to add the texture to the Drawable, we do so by creating a
321        // StateSet to contain the Texture StateAttribute.
322        osg::StateSet* stateset = polyGeom->getOrCreateStateSet();
323        stateset->setTextureAttributeAndModes(0, texture, osg::StateAttribute::ON);
324        stateset->setMode(GL_LIGHTING, osg::StateAttribute::OFF);
325        stateset->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
326
327        osg::Geode* geode = new osg::Geode();
328        geode->addDrawable(polyGeom);
329
330        if (useShaderDistortion)
331        {
332            // apply the distortion map texture
333            if (distortMapTexture)
334                geode->getOrCreateStateSet()->setTextureAttributeAndModes(1, distortMapTexture, osg::StateAttribute::ON);
335        }
336
337        // apply the blend map texture
338        if (blendMapTexture)
339            geode->getOrCreateStateSet()->setTextureAttributeAndModes(2, blendMapTexture, osg::StateAttribute::ON);
340
341        // set up the camera to render the textured quad
342        osg::Camera* camera = new osg::Camera;
343
344        // just inherit the main cameras view
345        camera->setReferenceFrame(osg::Transform::ABSOLUTE_RF);
346        camera->setViewMatrix(osg::Matrix::identity());
347        //camera->setProjectionMatrixAsOrtho2D(0,viewer->getCamera()->getViewport()->width(),0,viewer->getCamera()->getViewport()->height());
348                camera->setProjectionMatrixAsOrtho2D(0,1280,0,1024);
349
350        // set the camera to render before the main camera.
351        camera->setRenderOrder(osg::Camera::POST_RENDER, 200);
352
353        // only clear the depth buffer
354        camera->setClearMask(0);
355
356        // add subgraph to render
357        camera->addChild(geode);
358
359        if (useShaderDistortion)
360        {
361            // create shaders for distortion
362            osg::StateSet* ss = geode->getOrCreateStateSet();
363
364            osg::Program* distortProgram = new osg::Program;
365            distortProgram->setName( "distortion" );
366            osg::Shader* distortVertObj = new osg::Shader( osg::Shader::VERTEX );
367            osg::Shader* distortFragObj = new osg::Shader( osg::Shader::FRAGMENT );
368
369            if (loadShaderSource( distortVertObj, "shader.vert" ) &&
370                loadShaderSource( distortFragObj, "shader.frag" ) &&
371                distortMapTexture)
372            {
373                distortProgram->addShader( distortFragObj );
374                distortProgram->addShader( distortVertObj );
375                ss->addUniform( new osg::Uniform("textureImage", 0) );
376                ss->addUniform( new osg::Uniform("textureDistort", 1) );
377                ss->addUniform( new osg::Uniform("textureBlend", 2) );
378                ss->setAttributeAndModes(distortProgram, osg::StateAttribute::ON);
379            }
380                        else
381                        {
382                                OSG_NOTIFY(osg::FATAL) << "##################################" << std::endl << "## Unable to activate ShaderDistortion!" << std::endl << "## ABORT" << std::endl << "##################################" << std::endl;
383                                exit(0);
384                        }
385        }
386
387        parent->addChild(camera);
388    }
389
390    // then create the camera node to do the render to texture
391    {   
392        osg::Camera* camera = new osg::Camera;
393
394        // set up the background color and clear mask.
395        camera->setClearColor(clearColor);
396        camera->setClearMask(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
397
398
399        // just inherit the main cameras view
400                /* ABSOLUTE_RF required to make intersections possible.
401                Disadvantage of ABOLUTE_RF : the maincameras view matrix and projection
402                matrix has to copied to the PRE_RENDER camera by our self.
403                Therefore an update callback is installed.
404                */
405                camera->setReferenceFrame(osg::Transform::ABSOLUTE_RF); 
406        camera->setProjectionMatrix(osg::Matrixd::identity());
407        camera->setViewMatrix(osg::Matrixd::identity());
408
409        // set viewport
410        camera->setViewport(0,0,tex_width,tex_height);
411
412        // set the camera to render before the main camera.
413        camera->setRenderOrder(osg::Camera::PRE_RENDER, 0);
414
415                sceneCamera = camera;
416
417        // tell the camera to use OpenGL frame buffer object where supported.
418        camera->setRenderTargetImplementation(renderImplementation);
419
420        // attach the texture and use it as the color buffer.
421        camera->attach(osg::Camera::COLOR_BUFFER, texture);     // No Multisampling/Antialiasing
422                //camera->attach(osg::Camera::COLOR_BUFFER, texture, 0, 0, false, 4, 4); // 4x Multisampling/Antialiasing
423
424        // add subgraph to render
425        camera->addChild(subgraph);
426
427        parent->addChild(camera);
428    }   
429    return parent;
430}
431
432
433bool visual_distortion::loadShaderSource( osg::Shader* shader, const std::string& fileName )
434{
435    std::string foundFileName = osgDB::findDataFile(fileName);
436    if (foundFileName.length() != 0 )
437    {
438        return shader->loadShaderSourceFromFile( foundFileName.c_str() );
439    }
440
441    OSG_NOTIFY(osg::WARN) << "File \"" << fileName << "\" not found." << std::endl;
442
443    return false;
444}
445
446osg::Texture* visual_distortion::loadTexture( const std::string& fileName )
447{
448    std::string foundFileName = osgDB::findDataFile(fileName);
449    if (foundFileName.length() != 0 )
450    {
451        // load distortion map texture file
452        osg::Image* image = osgDB::readImageFile(foundFileName);
453        if (image)
454        {
455                        osg::Texture2D* texture = new osg::Texture2D;
456            texture->setImage(image);
457            texture->setFilter(osg::Texture2D::MIN_FILTER, osg::Texture2D::NEAREST);
458            texture->setFilter(osg::Texture2D::MAG_FILTER, osg::Texture2D::NEAREST);
459            texture->setWrap(osg::Texture2D::WRAP_S, osg::Texture2D::CLAMP_TO_EDGE);
460            texture->setWrap(osg::Texture2D::WRAP_T, osg::Texture2D::CLAMP_TO_EDGE);
461            return texture;
462        }
463    }
464
465    OSG_NOTIFY(osg::WARN) << "File \"" << fileName << "\" not found." << std::endl;
466
467    return NULL;
468}
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