1 /* OpenSceneGraph example, osglightpoint.
2 *
3 *  Permission is hereby granted, free of charge, to any person obtaining a copy
4 *  of this software and associated documentation files (the "Software"), to deal
5 *  in the Software without restriction, including without limitation the rights
6 *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
7 *  copies of the Software, and to permit persons to whom the Software is
8 *  furnished to do so, subject to the following conditions:
9 *
10 *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
11 *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
12 *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
13 *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
14 *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
15 *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
16 *  THE SOFTWARE.
17 */
18 
19 #include <osg/GL>
20 #include <osgViewer/Viewer>
21 
22 #include <osg/MatrixTransform>
23 #include <osg/Billboard>
24 #include <osg/Geode>
25 #include <osg/Group>
26 #include <osg/ShapeDrawable>
27 #include <osg/Notify>
28 #include <osg/PointSprite>
29 #include <osg/Texture2D>
30 #include <osg/BlendFunc>
31 
32 #include <osgDB/Registry>
33 #include <osgDB/ReadFile>
34 
35 #include <osgUtil/Optimizer>
36 
37 #include <osgSim/LightPointNode>
38 
39 #include <iostream>
40 
41 #define INTERPOLATE(member) lp.member = start.member*rstart + end.member*rend;
42 
addToLightPointNode(osgSim::LightPointNode & lpn,osgSim::LightPoint & start,osgSim::LightPoint & end,unsigned int noSteps)43 void addToLightPointNode(osgSim::LightPointNode& lpn,osgSim::LightPoint& start,osgSim::LightPoint& end,unsigned int noSteps)
44 {
45     if (noSteps<=1)
46     {
47         lpn.addLightPoint(start);
48         return;
49     }
50 
51     float rend = 0.0f;
52     float rdelta = 1.0f/((float)noSteps-1.0f);
53 
54     lpn.getLightPointList().reserve(noSteps);
55 
56     for(unsigned int i=0;i<noSteps;++i,rend+=rdelta)
57     {
58         float rstart = 1.0f-rend;
59         osgSim::LightPoint lp(start);
60         INTERPOLATE(_position)
61         INTERPOLATE(_intensity);
62         INTERPOLATE(_color);
63         INTERPOLATE(_radius);
64 
65         lpn.addLightPoint(lp);
66 
67    }
68 }
69 
70 #undef INTERPOLATE
71 
72 bool usePointSprites;
73 
createLightPointsDatabase()74 osg::Node* createLightPointsDatabase()
75 {
76     osgSim::LightPoint start;
77     osgSim::LightPoint end;
78 
79     start._position.set(-500.0f,-500.0f,0.0f);
80     start._color.set(1.0f,0.0f,0.0f,1.0f);
81 
82     end._position.set(500.0f,-500.0f,0.0f);
83     end._color.set(1.0f,1.0f,1.0f,1.0f);
84 
85     osg::MatrixTransform* transform = new osg::MatrixTransform;
86 
87     transform->setDataVariance(osg::Object::STATIC);
88     transform->setMatrix(osg::Matrix::scale(0.1,0.1,0.1));
89 
90     osg::Vec3 start_delta(0.0f,10.0f,0.0f);
91     osg::Vec3 end_delta(0.0f,10.0f,1.0f);
92 
93     int noStepsX = 100;
94     int noStepsY = 100;
95 
96 //     osgSim::BlinkSequence* bs = new osgSim::BlinkSequence;
97 //     bs->addPulse(1.0,osg::Vec4(1.0f,0.0f,0.0f,1.0f));
98 //     bs->addPulse(0.5,osg::Vec4(0.0f,0.0f,0.0f,0.0f)); // off
99 //     bs->addPulse(1.5,osg::Vec4(1.0f,1.0f,0.0f,1.0f));
100 //     bs->addPulse(0.5,osg::Vec4(0.0f,0.0f,0.0f,0.0f)); // off
101 //     bs->addPulse(1.0,osg::Vec4(1.0f,1.0f,1.0f,1.0f));
102 //     bs->addPulse(0.5,osg::Vec4(0.0f,0.0f,0.0f,0.0f)); // off
103 
104 
105 //    osgSim::Sector* sector = new osgSim::ConeSector(osg::Vec3(0.0f,0.0f,1.0f),osg::inDegrees(45.0),osg::inDegrees(45.0));
106 //    osgSim::Sector* sector = new osgSim::ElevationSector(-osg::inDegrees(45.0),osg::inDegrees(45.0),osg::inDegrees(45.0));
107 //    osgSim::Sector* sector = new osgSim::AzimSector(-osg::inDegrees(45.0),osg::inDegrees(45.0),osg::inDegrees(90.0));
108 //     osgSim::Sector* sector = new osgSim::AzimElevationSector(osg::inDegrees(180),osg::inDegrees(90), // azim range
109 //                                                                 osg::inDegrees(0.0),osg::inDegrees(90.0), // elevation range
110 //                                                                 osg::inDegrees(5.0));
111 
112     for(int i=0;i<noStepsY;++i)
113     {
114 
115 //         osgSim::BlinkSequence* local_bs = new osgSim::BlinkSequence(*bs);
116 //         local_bs->setSequenceGroup(new osgSim::BlinkSequence::SequenceGroup((double)i*0.1));
117 //         start._blinkSequence = local_bs;
118 
119 //        start._sector = sector;
120 
121         osgSim::LightPointNode* lpn = new osgSim::LightPointNode;
122 
123         //
124         osg::StateSet* set = lpn->getOrCreateStateSet();
125 
126         if (usePointSprites)
127         {
128             lpn->setPointSprite();
129 
130             // Set point sprite texture in LightPointNode StateSet.
131             osg::Texture2D *tex = new osg::Texture2D();
132             tex->setImage(osgDB::readRefImageFile("Images/particle.rgb"));
133             set->setTextureAttributeAndModes(0, tex, osg::StateAttribute::ON);
134         }
135 
136         //set->setMode(GL_BLEND, osg::StateAttribute::ON);
137         //osg::BlendFunc *fn = new osg::BlendFunc();
138         //fn->setFunction(osg::BlendFunc::SRC_ALPHA, osg::BlendFunc::DST_ALPHA);
139         //set->setAttributeAndModes(fn, osg::StateAttribute::ON);
140         //
141 
142         addToLightPointNode(*lpn,start,end,noStepsX);
143 
144         start._position += start_delta;
145         end._position += end_delta;
146 
147         transform->addChild(lpn);
148     }
149 
150     osg::Group* group = new osg::Group;
151     group->addChild(transform);
152 
153 
154     return group;
155 }
156 
CreateBlinkSequenceLightNode()157 static osg::Node* CreateBlinkSequenceLightNode()
158 {
159    osgSim::LightPointNode*      lightPointNode = new osgSim::LightPointNode;;
160 
161    osgSim::LightPointNode::LightPointList       lpList;
162 
163    osg::ref_ptr<osgSim::SequenceGroup>   seq_0;
164    seq_0 = new osgSim::SequenceGroup;
165    seq_0->_baseTime = 0.0;
166 
167    osg::ref_ptr<osgSim::SequenceGroup>   seq_1;
168    seq_1 = new osgSim::SequenceGroup;
169    seq_1->_baseTime = 0.5;
170 
171    const int max_points = 32;
172    for( int i = 0; i < max_points; ++i )
173    {
174       osgSim::LightPoint   lp;
175       double x = cos( (2.0*osg::PI*i)/max_points );
176       double z = sin( (2.0*osg::PI*i)/max_points );
177       lp._position.set( x, 0.0f, z + 30.0f );
178       lp._blinkSequence = new osgSim::BlinkSequence;
179       for( int j = 10; j > 0; --j )
180       {
181          float  intensity = j/10.0f;
182          lp._blinkSequence->addPulse( 1.0/max_points,
183                                      osg::Vec4( intensity, intensity, intensity, intensity ) );
184       }
185       if( max_points > 10 )
186       {
187          lp._blinkSequence->addPulse( 1.0 - 10.0/max_points,
188                                      osg::Vec4( 0.0f, 0.0f, 0.0f, 0.0f ) );
189       }
190 
191       if( i & 1 )
192       {
193          lp._blinkSequence->setSequenceGroup( seq_1.get() );
194       }
195       else
196       {
197          lp._blinkSequence->setSequenceGroup( seq_0.get() );
198       }
199       lp._blinkSequence->setPhaseShift( i/(static_cast<double>(max_points)) );
200       lpList.push_back( lp );
201    }
202 
203    lightPointNode->setLightPointList( lpList );
204 
205    return lightPointNode;
206 }
207 
main(int argc,char ** argv)208 int main( int argc, char **argv )
209 {
210     // use an ArgumentParser object to manage the program arguments.
211     osg::ArgumentParser arguments(&argc,argv);
212 
213     // set up the usage document, in case we need to print out how to use this program.
214     arguments.getApplicationUsage()->setDescription(arguments.getApplicationName()+" is the example which demonstrates use high quality light point, typically used for naviagional lights.");
215     arguments.getApplicationUsage()->setCommandLineUsage(arguments.getApplicationName()+" [options] filename ...");
216     arguments.getApplicationUsage()->addCommandLineOption("-h or --help","Display this information");
217     arguments.getApplicationUsage()->addCommandLineOption("--sprites","Point sprites.");
218 
219     // construct the viewer.
220     osgViewer::Viewer viewer;
221 
222     // if user request help write it out to cout.
223     if (arguments.read("-h") || arguments.read("--help"))
224     {
225         arguments.getApplicationUsage()->write(std::cout);
226         return 1;
227     }
228 
229     usePointSprites = false;
230     while (arguments.read("--sprites")) { usePointSprites = true; };
231 
232     osg::Group* rootnode = new osg::Group;
233 
234     // load the nodes from the commandline arguments.
235     rootnode->addChild(osgDB::readRefNodeFiles(arguments));
236     rootnode->addChild(createLightPointsDatabase());
237     rootnode->addChild(CreateBlinkSequenceLightNode());
238 
239     // run optimization over the scene graph
240     osgUtil::Optimizer optimzer;
241     optimzer.optimize(rootnode);
242 
243     // add a viewport to the viewer and attach the scene graph.
244     viewer.setSceneData( rootnode );
245 
246     return viewer.run();
247 }
248