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osgEarth数据加载及组织解析
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&&这​是​从​我​的​毕​业​论​文​中​节​选​出​来​的​。​其​中​是​在​网​友​勇​者​无​畏​提​供​的​基​础​上​进​行​了​增​改​和​自​己​的​理​解​,​再​此​谢​谢​他​~​希​望​能​给​大​家​帮​助​~​
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你可能喜欢/ VRlink_osgEarth_Qt
项目语言:C++
权限:read-only(如需更高权限请先加入项目)
VRlink_osgEarth_Qt/
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(C)&&2013&&Alibaba&&Inc.&&All&&rights&&resvered.
Powered by在我的上一篇博客中，在空旷的世界中只添加了cow，显得空旷，由于最近在做OSGEarth相关的开发，于是想着在OSG中怎么来添加一个数字球呢？
于是，来研究了下。发现，比我想象中的简单很多。
- 在OSG中添加一个球，这个用osg::Sphere实现
- 给新添的球设置一个半径为地球的半径，具体的就是WGS84坐标的参考半径
- 给球添加一个纹理，当然是全球影像了
- 给球添加经纬度坐标系统，可以利用osg::CoordinateSystemNode实现
- 给球添加操作器，目前的OSG中并没有像OSGEarth那样的earth操作器，只能拿TerrainManipulator来用了。若想要OSGEarth中那样操作器的效果，只能自己写一个了。
下面的代码：
osg* hints = new
hints-&setDetailRatio(5.0f);
osg* sd = new osg(
new osg(osg(0.0, 0.0, 0.0), osg), hints);
osg* geode = new
geode-&addDrawable(sd);
geode-&getOrCreateStateSet()-&setTextureAttributeAndModes(0,
new osg(osgDB("Images/land_shallow_topo_2048.jpg")));
osg* csn = new
csn-&setEllipsoidModel(new osg());
csn-&addChild(geode);
m_pRoot-&addChild(csn);
this-&getCamera()-&setNearFarRatio(0.00001f);
this-&setCameraManipulator(new osgGA);
参考知识库
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