相关资料：
https://blog.51cto.com/u_15127609/4146224
.pro
1 QT += core gui widgets
2 TARGET = TestOsgQt
3 TEMPLATE = app
4 DEFINES += QT_DEPRECATED_WARNINGS
5 CONFIG += c++11
6
7 SOURCES += \
8 main.cpp
9
10 HEADERS +=
11
12 OsgDir = D:\\RuanJian\\osg365R
13 CONFIG(release, debug|release) {
14 LIBS += -L$${OsgDir}/lib/ -losgDB -losgViewer -lOpenThreads -losgAnimation -losg \
15 -losgEarth -losgEarthAnnotation -losgEarthFeatures -losgEarthSymbology -losgEarthUtil \
16 -losgQOpenGL -losgUtil -losgText -losgTerrain -losgSim \
17 -losgShadow -losgParticle -losgManipulator -losgGA -losgFX \
18 -losgWidget
19 } else {
20 LIBS += -L$${OsgDir}/debug/lib/ -losgDBd -losgViewerd -lOpenThreadsd -losgAnimationd -losgd \
21 -losgEarthd -losgEarthAnnotationd -losgEarthFeaturesd -losgEarthSymbologyd -losgEarthUtild \
22 -losgQOpenGLd -losgUtild -losgTextd -losgTerraind -losgSimd \
23 -losgShadowd -losgParticled -losgManipulatord -losgGAd -losgFXd \
24 }
25
26
27 INCLUDEPATH += $${OsgDir}/include
28 DEPENDPATH += $${OsgDir}/includeView Code
main.cpp
1 #include <QApplication>
2 #ifdef _WIN32
3 #include <Windows.h>
4 #endif // _WIN32
5 #include <iostream>
6 //#include <math.h>
7
8 #include <osg/Node>
9 #include <osg/Group>
10 #include <osgDB/ReadFile>
11 #include <osgViewer/Viewer>
12 #include <osg/Geode>
13 #include <osg/ShapeDrawable>
14 #include <osg/Material>
15 #include <osg/Image>
16 #include <osg/Texture2D>
17 #include <osg/BoundingSphere>
18 #include <osg/LineWidth>
19 #include <osg/Point>
20 #include <osg/TexGen>
21 #include <osg/TexEnv>
22
23 //#include <osg/TessellationHints>
24 //#include <osg/NodePath>
25 #include <osgGA/GUIEventHandler>
26 #include <osgGA/GUIEventAdapter>
27
28 #include <osg/PositionAttitudeTransform>
29 #include <osgViewer/ViewerEventHandlers>
30 #include <osg/MatrixTransform>
31 #include <OpenThreads/Thread>
32 #include <osg/LightSource>
33 #include <osg/Light>
34
35 //#include <gdal.h>
36
37 osg::ref_ptr<osg::Node> CreateNode()
38 {
39 osg::ref_ptr<osg::Group> _root = new osg::Group;
40
41 //定义并读取高程文件
42 //真实高程文件名称为：ASTGTM2_N34E110_dem.tif
43 //属于特殊的tiff格式,GEOTiff
44 //读取的时候使用osg的gdal插件进行读取，所以在路径后面加上了.gdal
45 //.gdal后缀名只要在这里加就可以了，真实的高程文件后缀名不需要修改
46 //osg::ref_ptr<osg::HeightField> heightMap = osgDB::readHeightFieldFile("E:\\OpenSourceGraph\\osgearth_install20190830\\data\\world.tif.gdal");
47 osg::ref_ptr<osg::HeightField> heightMap = osgDB::readHeightFieldFile("D:/Gitee/mapdata/world.tif.gdal");
48
49
50 //创建一个叶结点对象
51 osg::ref_ptr<osg::Geode> geode = new osg::Geode;
52
53 if (heightMap != nullptr)
54 {
55 //由于原始数据过大，创建三维对象会失败，所以重新构造一个对象
56 //相当于数据抽稀了一次。当然，可以直接把原图使用特殊工具裁了
57 //创建一个新的HeightField对象，用来拷贝heightMap
58 osg::ref_ptr<osg::HeightField> heightMap1 = new osg::HeightField;
59 //从原对象中拷贝一些熟悉过来
60 heightMap1->setOrigin(heightMap->getOrigin());
61 heightMap1->setRotation(heightMap->getRotation());
62 heightMap1->setSkirtHeight(heightMap->getSkirtHeight());
63 //XY方向的间隔设置为原来的两倍，
64 heightMap1->setXInterval(heightMap->getXInterval() * 2);
65 heightMap1->setYInterval(heightMap->getYInterval() * 2);
66 //设置新的高程数据量的行列数目为原来的一半
67 heightMap1->allocate(heightMap->getNumColumns() / 2, heightMap->getNumRows() / 2);
68
69 //把真实的数据值放进来
70 for (size_t r = 0; r < heightMap1->getNumRows(); ++r)
71 {
72 for (size_t c = 0; c < heightMap1->getNumColumns(); ++c)
73 {
74 //加载的数据中XY方向的间隔是0.0002左右（经纬度偏移），3600个格子，数量级太小，高程值动辄在千级别，如果没有进行坐标转换（GPS转换成米）,显示出来之后结果会严重失常。所以此处简单的给高度值除以50000（这个是按照这个tif文件来试出来的，不同高程文件可能不同）
75 heightMap1->setHeight(c, r, heightMap->getHeight(c * 2, r * 2) / 500);
76 }
77 }
78
79 //添加到叶子节点中
80 geode->addDrawable(new osg::ShapeDrawable(heightMap1));
81
82
83 osg::ref_ptr<osg::Material> material = new osg::Material;
84 material->setAmbient(osg::Material::FRONT_AND_BACK, osg::Vec4(1.0f, 1.0f, 1.0f, 1.0f));
85 material->setDiffuse(osg::Material::FRONT_AND_BACK, osg::Vec4(1.0f, 1.0f, 1.0f, 1.0f));
86 material->setSpecular(osg::Material::FRONT_AND_BACK, osg::Vec4(1.0f, 1.0f, 1.0f, 1.0f));
87 material->setShininess(osg::Material::FRONT_AND_BACK, 60);
88
89
90 osg::ref_ptr<osg::Texture2D> texture2D = new osg::Texture2D;
91 //设置纹理
92 osg::ref_ptr<osg::Image> image1 = osgDB::readImageFile("D:/Gitee/OsgTestQt/src/No1-D/Earth_Color_16k.jpg");
93 if (image1.valid())
94 {
95 texture2D->setImage(image1.get());
96 }
97 texture2D->setDataVariance(osg::Object::DYNAMIC);
98 geode->getOrCreateStateSet()->setAttributeAndModes(material.get(), osg::StateAttribute::ON);
99 geode->getOrCreateStateSet()->setTextureAttributeAndModes(0, texture2D, osg::StateAttribute::ON);
100
101 }
102
103 _root->addChild(geode.get());
104 return _root.get();
105 }
106
107 osg::ref_ptr<osg::Light> createLight()
108 {
109 osg::ref_ptr<osg::Light> l = new osg::Light;
110 l->setLightNum(0);//启用第几个光源 OpenGL有8个光源
111 l->setDirection(osg::Vec3(0, 0, -1));//方向
112 l->setPosition(osg::Vec4(10.0, 10.0, 0.0, 0.0f));//位置
113 //osg::LightSource* ls = new osg::LightSource();//此处用超级指针 返回会发生错误
114 //ls->setLight(l);
115 return l;
116 }
117
118
119
120 int main()
121 {
122 osg::ref_ptr<osgViewer::Viewer> viewer1 = new osgViewer::Viewer;
123 osg::ref_ptr<osg::Group> group1 = new osg::Group;
124
125 group1->addChild(CreateNode());
126 viewer1->setSceneData(group1.get());
127 viewer1->setUpViewInWindow(200, 200, 600, 400, 0);
128 viewer1->setLight(createLight());
129
130
131 return viewer1->run();
132 }View Code
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