osg,纹理贴图，地球、月球、火星

createSphere.h

#include <osg/Shape>#include <osg/ShapeDrawable>#include <osg/Geode>osg::ref_ptr<osg::Geode> createSphere(float radius){osg::ref_ptr<osg::Sphere> sphereShape = new osg::Sphere(osg::Vec3(2.5,0.0,0.0),radius);osg::ref_ptr<osg::ShapeDrawable> sphereShapeDrawable = new osg::ShapeDrawable(sphereShape.get());osg::ref_ptr<osg::Geode> sphereGeode = new osg::Geode;sphereGeode->addDrawable(sphereShapeDrawable.get());return sphereGeode;}

 

main.cpp

#include "createSphere.h"#include <osg/Group>#include <osgDB/readfile>#include <osgViewer/Viewer>#include <osg/TexEnv>#include <osg/Texture2D>#include <osg/PositionAttitudeTransform>#include <iostream>#ifdef _DEBUG#pragma comment(lib,"osgDBd.lib")#pragma comment(lib,"osgViewerd.lib")#pragma comment(lib,"osgd.lib")#else#pragma comment(lib,"osgDB.lib")#pragma comment(lib,"osgViewer.lib")#pragma comment(lib,"osg.lib")#endifint main(){//Declear the root node osg::ref_ptr<osg::Group> root = new osg::Group;//Declear the viewer instanceosgViewer::Viewer myViewer;//Declear textureosg::ref_ptr<osg::Texture2D> fogTexture = new osg::Texture2D;fogTexture->setDataVariance(osg::Object::DYNAMIC);osg::ref_ptr<osg::Image> smokeImage = osgDB::readImageFile("land_shallow_topo_2048.jpg");if (!smokeImage.get()){std::cout<<"open file is failed!"<<std::endl;return -1;}fogTexture->setImage(smokeImage.get());osg::ref_ptr<osg::Geode> sphereOne = createSphere(2.0);//Create a TexEnv instance for binding the StateSetosg::ref_ptr<osg::TexEnv> sphereOneTexEnv = new osg::TexEnv;sphereOneTexEnv->setMode(osg::TexEnv::DECAL);osg::ref_ptr<osg::StateSet> sphereOneStateSet = new osg::StateSet;sphereOneStateSet->setAttribute(sphereOneTexEnv.get());sphereOneStateSet->setAttributeAndModes(fogTexture.get());sphereOne->setStateSet(sphereOneStateSet.get());//the second sphereosg::ref_ptr<osg::Geode> sphereTwo = createSphere(0.5);osg::ref_ptr<osg::PositionAttitudeTransform> sphereTwoPositionTransform = new osg::PositionAttitudeTransform;sphereTwoPositionTransform->setPosition(osg::Vec3(5.0,0.0,0.0));sphereTwoPositionTransform->addChild(sphereTwo.get());osg::ref_ptr<osg::Texture2D> moonTexture = new osg::Texture2D;osg::ref_ptr<osg::Image> moonImage = osgDB::readImageFile("moon.jpg");if (!moonImage.get()){std::cout<<"moon file open error"<<std::endl;return -1;}moonTexture->setImage(moonImage.get());osg::ref_ptr<osg::TexEnv> texEnvSphereTwo = new osg::TexEnv;texEnvSphereTwo->setMode(osg::TexEnv::BLEND);osg::ref_ptr<osg::StateSet> sphereTwoStateSet = new osg::StateSet;sphereTwoStateSet->setAttribute(texEnvSphereTwo.get());sphereTwoStateSet->setAttributeAndModes(moonTexture.get());sphereTwoStateSet->setMode(GL_FOG,osg::StateAttribute::OFF|osg::StateAttribute::OVERRIDE);sphereTwo->setStateSet(sphereTwoStateSet.get());//the third sphereosg::ref_ptr<osg::Geode> sphereThree = createSphere(1.6);osg::ref_ptr<osg::PositionAttitudeTransform> sphereThreePositionTrans = new osg::PositionAttitudeTransform;sphereThreePositionTrans->setPosition(osg::Vec3(30,0,0));sphereThreePositionTrans->addChild(sphereThree.get());osg::ref_ptr<osg::Texture2D> marsTexture = new osg::Texture2D;marsTexture->setDataVariance(osg::Object::DYNAMIC);osg::ref_ptr<osg::Image> marsImage = osgDB::readImageFile("mars.jpg");if (!marsImage.get()){std::cout<<"moon file open error"<<std::endl;return -1;}marsTexture->setImage(marsImage.get());osg::ref_ptr<osg::StateSet> sphereThreeStateSet = new osg::StateSet;osg::ref_ptr<osg::TexEnv> sphereThreeTexEnv = new osg::TexEnv;sphereThreeTexEnv->setMode(osg::TexEnv::DECAL);sphereThreeStateSet->setAttributeAndModes(marsTexture.get());sphereThreeStateSet->setAttribute(sphereThreeTexEnv.get());sphereThreeStateSet->setMode(GL_FOG,osg::StateAttribute::OFF);sphereThree->setStateSet(sphereThreeStateSet.get());root->setStateSet(sphereOneStateSet.get());root->addChild(sphereOne.get());root->addChild(sphereTwoPositionTransform.get());root->addChild(sphereThreePositionTrans.get());myViewer.setSceneData(root.get());myViewer.realize();myViewer.run();}

纹理可以自己上网找随便找几张就行，我就是这么办得。