OSG文字的显示

原文地址： http://www.cnblogs.com/xiaocainiao2hao/p/5619926.html

 

#include <Windows.h>

#include <osg/Geode>

#include <osg/Geometry>

#include <osgText/Text>

#include <osgViewer/Viewer>

#include <locale.h>

#include <osgDB/ReadFile>



void setupProperties(osgText::Text& textObject,osgText::Font* font,float size,const osg::Vec3& pos )

{

textObject.setFont(font);//

textObject.setCharacterSize(size);//字体大小
textObject.setPosition(pos);
textObject.setColor(osg::Vec4(1.0,1.0,1.0,1.0));
textObject.setAlignment(osgText::Text::CENTER_BOTTOM);//文字显示方向
//textObject.setAxisAlignment(osgText::Text::SCREEN);//获取文字对称成方式正对屏幕方向
//textObject.setCharacterSizeMode(osgText::Text::SCREEN_COORDS);//跟随视角不断变化，离物体越远，文字越大
textObject.setAutoRotateToScreen(true);//跟随视角不断变化，但离物体越远，文字越小，和现实当中像类似
textObject.setBackdropType(osgText::Text::OUTLINE);//对文字进行描边
textObject.setBackdropColor(osg::Vec4(1.0,0.0,0.0,1.0));//描边颜色
textObject.setDrawMode(osgText::Text::TEXT | osgText::Text::BOUNDINGBOX);//添加文字边框

textObject.setAxisAlignment(osgText::Text::XZ_PLANE);//获取文字对称成方式



}



void createContent(osgText::Text& textObject,const char* string)

{

int requiredSize=mbstowcs(NULL,string,0);//如果mbstowcs第一参数为NULL那么返回字符串的数目

wchar_t* wText=new wchar_t[requiredSize+1];

mbstowcs(wText,string,requiredSize+1);//由char转换成wchar类型

textObject.setText(wText);

delete wText;

}



int main()

{

setlocale(LC_ALL,".936");//　配置地域化信息

const char* titleString="木兰辞\n拟古决绝词简友";

const char* textString={

"人生若只如初见，何事秋风悲画扇；\n"

"等闲变却故人心，却道故人心易变；\n"

"骊山语罢倾销半，夜雨霖铃终不怨；\n"

"何如薄幸锦衣郎，比翼连枝当日愿。"

};

osgText::Font* fontHei=osgText::readFontFile("C:\\WINDOWS\\Fonts\\simhei.ttf");

osgText::Font* fontKai=osgText::readFontFile("C:\\WINDOWS\\Fonts\\simkai.ttf");



osg::ref_ptr<osgText::Text> title=new osgText::Text;

setupProperties(*title,fontHei,20.0f,osg::Vec3(0.0,0.0,0.0));

createContent(*title,titleString);



osg::ref_ptr<osgText::Text> text=new osgText::Text;

setupProperties(*text,fontKai,15.0,osg::Vec3(0.0,0.0,-80.0f));

createContent(*text,textString);



osg::ref_ptr<osg::Geode> geode=new osg::Geode;

geode->addDrawable(osg::createTexturedQuadGeometry(osg::Vec3(-150.0,1.0,-130.0),osg::Vec3(300.0,0.0,0.0),osg::Vec3(0.0,0.0,200.0),1.0,1.0));//创建一个写字板



geode->addDrawable(title.get());

geode->addDrawable(text.get());

osgViewer::Viewer viewer;

viewer.setSceneData(geode.get());

return viewer.run();

}