十二、OSG学习笔记-Control

上一章节：

十一、OSG学习笔记-操作系统接口-CSDN博客https://blog.csdn.net/weixin_36323170/article/details/145891502

本章节代码：

OsgStudy/Controls · CuiQingCheng/OsgStudy - 码云 - 开源中国https://gitee.com/cuiqingcheng/osg-study/tree/master/OsgStudy/Controls

一、Viewer介绍

osg::Referenced: 负责内存安全策略，智能指针ref_ptr;

osg::Object:负责对象的安全策略，数据IO的写入写出；

1、osgViewer::ViewerBase类中成员变量的介绍：

ViewerBase实例代码：

#include <windows.h>
#include <iostream>

#include <osgViewer/Viewer>
#include <osgDB/ReadFile>
#include <osgGA/TrackballManipulator>
#include <osgGA/GUIEventAdapter>

int main() {
	osg::ref_ptr<osgViewer::Viewer> viewer = new osgViewer::Viewer;

	viewer->setSceneData(osgDB::readNodeFile("glider.osg"));
	// 设置默认操作器
	viewer->setCameraManipulator(new osgGA::TrackballManipulator);
	
	viewer->realize();
	
	viewer->setKeyEventSetsDone(osgGA::GUIEventAdapter::KEY_KP_Space);

	// 线程渲染模式
	std::cout << "Threading model: " << viewer->getThreadingModel() << std::endl;

	viewer->run();
	

	/*  替代 run()的作用
	int frameNum = 300;
	while (!(viewer->done()))
	{
		if (frameNum)
		{
			viewer->setDone(true);
			std::cout << "No need to Continue " << frameNum << std::endl;// 300帧渲染完了，就推出渲染
		}
		frameNum--;
		viewer->frame();
	}
	*/
	return 0;
}

2、Osg::View的用法：