1、将osg::Image转换成osg::HeightField
src\osgEarth\ImageToHeighFieldConvter
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;
}
原文链接: https://www.cnblogs.com/coolbear/archive/2013/06/09/3128613.html
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