1、将osg::Image转换成osg::HeightField
src\osgEarth\ImageToHeighFieldConvter
【Image|Image HeightField】例子：
ImageToHeighFieldConvter conv;
osg::Image* image = osgDB::readImageFile("img.tif");
osg::HeightField* hf = conv.convert( image );
2、下面这个函数是夹在一张高程图片，再贴上纹理
osg::Node* createHeightField(std::string heightFile, std::string texFile) { osg::Image* heightMap = osgDB::readImageFile(heightFile); osg::HeightField* heightField = new osg::HeightField(); heightField->allocate(heightMap->s(), heightMap->t()); heightField->setOrigin(osg::Vec3(-heightMap->s() / 2, -heightMap->t() / 2, 0)); heightField->setXInterval(1.0f); heightField->setYInterval(1.0f); heightField->setSkirtHeight(1.0f); for (int r = 0; r < heightField->getNumRows(); r++) { for (int c = 0; c < heightField->getNumColumns(); c++) { heightField->setHeight(c, r, ((*heightMap->data(c, r)) / 255.0f) * 80.0f); } } osg::Geode* geode = new osg::Geode(); geode->addDrawable(new osg::ShapeDrawable(heightField)); osg::Texture2D* tex = new osg::Texture2D(osgDB::readImageFile(texFile)); tex->setFilter(osg::Texture2D::MIN_FILTER,osg::Texture2D::LINEAR_MIPMAP_LINEAR); tex->setFilter(osg::Texture2D::MAG_FILTER,osg::Texture2D::LINEAR); tex->setWrap(osg::Texture::WRAP_S, osg::Texture::REPEAT); tex->setWrap(osg::Texture::WRAP_T, osg::Texture::REPEAT); geode->getOrCreateStateSet()->setTextureAttributeAndModes(0, tex); return geode; }
转载于:https://www.cnblogs.com/coolbear/archive/2013/06/09/3128613.html
