root/OpenSceneGraph/trunk/examples/osgkdtree/osgkdtree.cpp @ 8535

Revision 8535, 4.1 kB (checked in by robert, 5 years ago)

Added prelimnary KdTree? data structure and automatic kdtree build support
into osgDB::Registry/osgTerrain so that newly created subgraphs can have
KdTree? built on all osg::Geometry automatically on load/creation.

Line 
1/* OpenSceneGraph example, osgintersection.
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 
20#include <osgDB/ReadFile>
21
22#include <osg/ArgumentParser>
23#include <osg/ApplicationUsage>
24#include <osg/Timer>
25#include <osg/CoordinateSystemNode>
26#include <osg/Notify>
27#include <osg/io_utils>
28#include <osg/Geometry>
29#include <osg/TriangleIndexFunctor>
30
31
32#include <osgUtil/IntersectionVisitor>
33#include <osgUtil/LineSegmentIntersector>
34#include <osgUtil/UpdateVisitor>
35
36#include <osgSim/LineOfSight>
37#include <osgSim/HeightAboveTerrain>
38#include <osgSim/ElevationSlice>
39
40#include <osgViewer/Viewer>
41
42#include "fixeddivision.h"
43#include "variabledivision.h"
44
45#include <osg/KdTree>
46
47int main(int argc, char **argv)
48{
49    // use an ArgumentParser object to manage the program arguments.
50    osg::ArgumentParser arguments(&argc,argv);
51   
52    int maxNumLevels = 16;
53    int targetNumIndicesPerLeaf = 16;
54    bool processTriangles = true;
55
56    while (arguments.read("--max", maxNumLevels)) {}
57    while (arguments.read("--leaf", targetNumIndicesPerLeaf)) {}
58    while (arguments.read("--points")) processTriangles = false;
59    while (arguments.read("--triangles")) processTriangles = true;
60   
61    osgDB::Registry::instance()->setBuildKdTreesHint(osgDB::ReaderWriter::Options::BUILD_KDTREES);
62   
63    osg::ref_ptr<osg::Node> scene = osgDB::readNodeFiles(arguments);
64   
65    if (!scene)
66    {
67        std::cout<<"No model loaded, please specify a valid model on the command line."<<std::endl;
68        return 0;
69    }
70
71
72    osgUtil::UpdateVisitor updateVisitor;
73    updateVisitor.setFrameStamp(new osg::FrameStamp);
74    scene->accept(updateVisitor);
75    scene->getBound();
76
77    if (arguments.read("--fd"))
78    {
79        fixeddivision::KDTreeBuilder builder;
80
81        builder._maxNumLevels = maxNumLevels;
82        builder._targetNumIndicesPerLeaf = targetNumIndicesPerLeaf;
83        builder._processTriangles = processTriangles;
84
85
86        osg::Timer_t start = osg::Timer::instance()->tick();
87
88
89        scene->accept(builder);
90
91        osg::Timer_t end = osg::Timer::instance()->tick();
92        double time = osg::Timer::instance()->delta_s(start,end);
93        osg::notify(osg::NOTICE)<<"Time to build "<<time*1000.0<<"ms "<<builder._numVerticesProcessed<<std::endl;
94        osg::notify(osg::NOTICE)<<"build speed "<<(double(builder._numVerticesProcessed)/time)/1000000.0<<"M vertices per second"<<std::endl;
95    }
96    else if (arguments.read("--vd"))
97    {
98        variabledivision::KDTreeBuilder builder;
99
100        builder._maxNumLevels = maxNumLevels;
101        builder._targetNumTrianglesPerLeaf = targetNumIndicesPerLeaf;
102        builder._processTriangles = processTriangles;
103
104
105        osg::Timer_t start = osg::Timer::instance()->tick();
106
107
108        scene->accept(builder);
109
110        osg::Timer_t end = osg::Timer::instance()->tick();
111        double time = osg::Timer::instance()->delta_s(start,end);
112        osg::notify(osg::NOTICE)<<"Time to build "<<time*1000.0<<"ms "<<builder._numVerticesProcessed<<std::endl;
113        osg::notify(osg::NOTICE)<<"build speed "<<(double(builder._numVerticesProcessed)/time)/1000000.0<<"M vertices per second"<<std::endl;
114    }   
115    else
116    {
117        osgViewer::Viewer viewer;
118        viewer.setSceneData(scene.get());
119        return viewer.run();
120    }   
121   
122    return 0;
123}
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