osg osgText::Text 中文乱码问题修复解决中

news2025/10/31 18:54:25

#include <osgDB/ConvertUTF>

osg::Camera* osgWidget::createTextHUD()
{    
    osgText::Font* fontHei = osgText::readFontFile("Fonts/simkai.ttf");
	text->setFont(fontHei);

	// 步骤二：设置 文字颜色: 红色， 透明度有效（opengl需要额外开启透明通道）
	text->setColor(osg::Vec4f(1.0, 1.0, 1.0, 1.0));
	//    pText->setColor(osg::Vec4f(1.0, 1.0, 1.0, 0.2));    
	// 步骤三：设置 文字位置（设置文字框的中心点的坐标)
	text->setPosition(osg::Vec3f(0, 0, 0));
	// 步骤四：设置 文字方向
	//text->setAxisAlignment(osgText::Text::XZ_PLANE);
	// 步骤五：设置 大小模式(测试当前没发现有什么区别）
	text->setCharacterSizeMode(osgText::Text::OBJECT_COORDS);
	//    pText->setCharacterSizeMode(osgText::Text::SCREEN_COORDS);
	//    pText->setCharacterSizeMode(osgText::Text::OBJECT_COORDS_WITH_MAXIMUM_SCREEN_SIZE_CAPPED_BY_FONT_HEIGHT);
	// 步骤六：设置 分辨率
	text->setFontResolution(50, 50);
	// 步骤七：设置 对齐方式
	text->setAlignment(osgText::Text::LEFT_CENTER);
	// 步骤八：设置 输出格式
	text->setLayout(osgText::Text::LEFT_TO_RIGHT);
	//    pText->setLayout(osgText::Text::RIGHT_TO_LEFT);
	//    pText->setLayout(osgText::Text::VERTICAL);
	// 步骤九：设置 绘制模式
	//    pText->setDrawMode(osgText::Text::TEXT);
	//    pText->setDrawMode(osgText::Text::BOUNDINGBOX);
	//    pText->setDrawMode(osgText::Text::FILLEDBOUNDINGBOX);
	//    pText->setDrawMode(osgText::Text::ALIGNMENT);
	// 步骤十：设置 背景类型
	//    pText->setBackdropType(osgText::Text::DROP_SHADOW_BOTTOM_RIGHT);
	//    pText->setBackdropType(osgText::Text::DROP_SHADOW_CENTER_RIGHT);
	//    pText->setBackdropType(osgText::Text::DROP_SHADOW_TOP_RIGHT);
	//    pText->setBackdropType(osgText::Text::DROP_SHADOW_BOTTOM_CENTER);
	//    pText->setBackdropType(osgText::Text::DROP_SHADOW_TOP_CENTER);
	//    pText->setBackdropType(osgText::Text::DROP_SHADOW_BOTTOM_LEFT);
	//    pText->setBackdropType(osgText::Text::DROP_SHADOW_CENTER_LEFT);
	//    pText->setBackdropType(osgText::Text::DROP_SHADOW_TOP_LEFT);
	//    pText->setBackdropType(osgText::Text::OUTLINE);
	text->setBackdropType(osgText::Text::NONE);
	// 步骤十一：设置 颜色倾斜模式
	text->setColorGradientMode(osgText::Text::SOLID);
	//    pText->setColorGradientMode(osgText::Text::PER_CHARACTER);
	//    pText->setColorGradientMode(osgText::Text::OVERALL);
	// 以上部分属性是默认的，可以不设置，此处为阅读都写出来
	QString version = "V1.16.0";
	QString textString = QString("OsgDemo %1(渲染中文文字)").arg(version);
std::string str = osgDB::convertStringFromCurrentCodePageToUTF8(textString.toStdString());

	text->setText(str, osgText::String::ENCODING_UTF8);
	//

	//压入顶点
	osg::Vec3Array *vecArray = new osg::Vec3Array;
	vecArray->push_back(osg::Vec3(0.0, 0.0, 0.0));
	vecArray->push_back(osg::Vec3(200.0, 0.0, 0.0));
	vecArray->push_back(osg::Vec3(200.0, 100.0, 0.0));
	vecArray->push_back(osg::Vec3(0.0, 100.0, 0.0));
	geometry->setVertexArray(vecArray);

	//法线
	osg::Vec3Array *vecNorm = new osg::Vec3Array;
	vecNorm->push_back(osg::Vec3(0.0, 0.0, 1.0));
	geometry->setNormalArray(vecNorm);
	geometry->setNormalBinding(osg::Geometry::BIND_OVERALL);

	//设置纹理
	osg::Vec2Array *vec2Coord = new osg::Vec2Array;
	vec2Coord->push_back(osg::Vec2(0.0, 0.0));
	vec2Coord->push_back(osg::Vec2(1.0, 0.0));
	vec2Coord->push_back(osg::Vec2(1.0, 1.0));
	vec2Coord->push_back(osg::Vec2(0.0, 1.0));
	geometry->setTexCoordArray(0, vec2Coord);

	osg::DrawArrays *drawArrays = new osg::DrawArrays(osg::PrimitiveSet::QUADS, 0, 4);
	//drawArrays->setPrimitiveSet(0,drawArrays1);
	geometry->addPrimitiveSet(drawArrays);

	osg::Image* image = osgDB::readImageFile("############.jpg");

	osg::Texture2D* texture2d = new osg::Texture2D;

	texture2d->setDataVariance(osg::Object::DYNAMIC);
	texture2d->setImage(image);

	geometry->getOrCreateStateSet()->setTextureAttributeAndModes(0, texture2d, osg::StateAttribute::ON);
	//关闭灯光
	geometry->getOrCreateStateSet()->setMode(GL_LIGHTING, osg::StateAttribute::OFF);

	geode->getOrCreateStateSet()->setMode(GL_LIGHTING, osg::StateAttribute::OFF);
	
	//geode->addDrawable(geometry);
	geode->addDrawable(text);

	camera->addChild(geode);

	return camera;
}