欢迎您访问程序员文章站本站旨在为大家提供分享程序员计算机编程知识!
您现在的位置是: 首页

OSGEarth添加文字

程序员文章站 2022-06-10 21:12:31
...

目录

一、类型转换

二、编码修改

三、文字添加

四、完整代码 


本文主要介绍在OSGEarth中实现在指定经纬度添加文字。

一、类型转换

下列代码用于是实现将String类型的字符串转换为WString类型,才可被相应函数接收作为输入。

std::wstring String2WString(const std::string& s)
{
	std::string strLocale = setlocale(LC_ALL, "");
	const char* chSrc = s.c_str();
	size_t nDestSize = mbstowcs(NULL, chSrc, 0) + 1;
	wchar_t* wchDest = new wchar_t[nDestSize];
	wmemset(wchDest, 0, nDestSize);
	mbstowcs(wchDest, chSrc, nDestSize);
	std::wstring wstrResult = wchDest;
	delete[]wchDest;
	setlocale(LC_ALL, strLocale.c_str());
	return wstrResult;
}

二、编码修改

 下列代码用于实现将Unicode编码转换为UTF8编码,这样在OSGEarth中添加的中文才不会出错。

void unicodeToUTF8(const wstring &src, string& result)
{
	int n = WideCharToMultiByte(CP_UTF8, 0, src.c_str(), -1, 0, 0, 0, 0);
	result.resize(n);
	::WideCharToMultiByte(CP_UTF8, 0, src.c_str(), -1, (char*)result.c_str(), result.length(), 0, 0);
}

三、文字添加

下列代码用于实现在指定经纬度添加文字,字体的属性可以根据需要进行修改,在添加英文时,可删除simkai.ttf字体属性设置;若添加中文,则不可省略simkai.ttf字体属性设置。

void addPositionName()
{
    osg::ref_ptr<osg::Group> earthLabel = new osg::Group;

	//字体属性
	osgEarth::Style style;
	osgEarth::Symbology::TextSymbol * textStyle = style.getOrCreateSymbol<osgEarth::Symbology::TextSymbol>();
	//设置颜色
	textStyle->fill()->color() = osg::Vec4f(1.0, 1.0, 1.0, 1.0);
	//设置边框
	textStyle->halo()->color() = osg::Vec4f(0.0, 0.0, 1.0, 1.0);
	textStyle->font() = "simkai.ttf";
	textStyle->size() = 13.0;
	textStyle->encoding() = osgEarth::Symbology::TextSymbol::ENCODING_UTF8;
	
	//读取文件
	//std::fstream fin("./place/place.txt", std::ios::in);
	string name[] = { "洗炼厂", "洗炼厂", "环保坝", "坝体", "生活区", "小阿希河" };//, "阿希金矿"};
	double lon[] = { 81.617947, 81.623095, 81.623418, 81.622755, 81.614893, 81.622220 };//, 81.629543 };
	double lat[] = { 44.237668, 44.245067 , 44.227526 , 44.230978 , 44.239895 , 44.225495 };//, 44.239629 };
	for (int i = 0; i < 6; i ++)
	{
		//添加地名
		const osgEarth::SpatialReference* geoSRS = mapNode->getMapSRS()->getGeographicSRS();
		std::string _strWideName;
		unicodeToUTF8(String2WString(name[i]), _strWideName);
		//test
		//MessageBox(NULL, "Hi", _strWideName.c_str(), MB_OK);
		osgEarth::Annotation::PlaceNode *pn = new osgEarth::Annotation::PlaceNode(mapNode, osgEarth::GeoPoint(geoSRS, lon[i], lat[i]), NULL, _strWideName, style);
		//pn->setScale(osg::Vec3(1, 1, 1));
		earthLabel->addChild(pn);
	}
	
}

四、完整代码 

std::wstring String2WString(const std::string& s)
{
	std::string strLocale = setlocale(LC_ALL, "");
	const char* chSrc = s.c_str();
	size_t nDestSize = mbstowcs(NULL, chSrc, 0) + 1;
	wchar_t* wchDest = new wchar_t[nDestSize];
	wmemset(wchDest, 0, nDestSize);
	mbstowcs(wchDest, chSrc, nDestSize);
	std::wstring wstrResult = wchDest;
	delete[]wchDest;
	setlocale(LC_ALL, strLocale.c_str());
	return wstrResult;
}

void unicodeToUTF8(const wstring &src, string& result)
{
	int n = WideCharToMultiByte(CP_UTF8, 0, src.c_str(), -1, 0, 0, 0, 0);
	result.resize(n);
	::WideCharToMultiByte(CP_UTF8, 0, src.c_str(), -1, (char*)result.c_str(), result.length(), 0, 0);
}

void addPositionName()
{
    osg::ref_ptr<osg::Group> earthLabel = new osg::Group;

	//字体属性
	osgEarth::Style style;
	osgEarth::Symbology::TextSymbol * textStyle = style.getOrCreateSymbol<osgEarth::Symbology::TextSymbol>();
	//设置颜色
	textStyle->fill()->color() = osg::Vec4f(1.0, 1.0, 1.0, 1.0);
	//设置边框
	textStyle->halo()->color() = osg::Vec4f(0.0, 0.0, 1.0, 1.0);
	textStyle->font() = "simkai.ttf";
	textStyle->size() = 13.0;
	textStyle->encoding() = osgEarth::Symbology::TextSymbol::ENCODING_UTF8;
	
	//读取文件
	//std::fstream fin("./place/place.txt", std::ios::in);
	string name[] = { "洗炼厂", "洗炼厂", "环保坝", "坝体", "生活区", "小阿希河" };//, "阿希金矿"};
	double lon[] = { 81.617947, 81.623095, 81.623418, 81.622755, 81.614893, 81.622220 };//, 81.629543 };
	double lat[] = { 44.237668, 44.245067 , 44.227526 , 44.230978 , 44.239895 , 44.225495 };//, 44.239629 };
	for (int i = 0; i < 6; i ++)
	{
		//添加地名
		const osgEarth::SpatialReference* geoSRS = mapNode->getMapSRS()->getGeographicSRS();
		std::string _strWideName;
		unicodeToUTF8(String2WString(name[i]), _strWideName);
		//test
		//MessageBox(NULL, "Hi", _strWideName.c_str(), MB_OK);
		osgEarth::Annotation::PlaceNode *pn = new osgEarth::Annotation::PlaceNode(mapNode, osgEarth::GeoPoint(geoSRS, lon[i], lat[i]), NULL, _strWideName, style);
		//pn->setScale(osg::Vec3(1, 1, 1));
		earthLabel->addChild(pn);
	}
	
}

 

相关标签: OSG