OSG学习：响应键盘鼠标示例

示例功能：示例里面有两个模型，一个是牛，另一个是飞机。鼠标右键时牛和飞机都隐藏，鼠标左键双击时牛和飞机都显示，按键盘上面的LEFT键，显示牛，按键盘上面的RIGHT键显示飞机。其中显示与隐藏节点使用的是setNodeMask(bool)。bool的值为0的时候是隐藏，1的时候是显示。

#include<osgDB\ReadFile>

#include<osgViewer\Viewer>

#include<osg\Node>

class UseEventHandler :public osgGA::GUIEventHandler

{

public:

	virtual bool handle(const osgGA::GUIEventAdapter& ea, osgGA::GUIActionAdapter& aa)

	{

		osgViewer::Viewer* viewer = dynamic_cast<osgViewer::Viewer*>(&aa);

		if (!viewer)return false;

		switch (ea.getEventType())

		{

		case osgGA::GUIEventAdapter::KEYDOWN:

		{

												if (ea.getKey() == 0xFF51)

												{

													viewer->getSceneData()->asGroup()->getChild(1)->setNodeMask(0);

													viewer->getSceneData()->asGroup()->getChild(0)->setNodeMask(1);

												}

												if (ea.getKey() == 0xFF53)

												{

													viewer->getSceneData()->asGroup()->getChild(0)->setNodeMask(0);

													viewer->getSceneData()->asGroup()->getChild(1)->setNodeMask(1);

												}

												break;

		}

		case osgGA::GUIEventAdapter::PUSH:

			if (ea.getButton() == 4)

			{

				viewer->getSceneData()->asGroup()->getChild(0)->setNodeMask(0);

				viewer->getSceneData()->asGroup()->getChild(1)->setNodeMask(0);

			}

			break;

		case osgGA::GUIEventAdapter::DOUBLECLICK:

			if (ea.getButton() == 1)

			{

				viewer->getSceneData()->asGroup()->getChild(0)->setNodeMask(1);

				viewer->getSceneData()->asGroup()->getChild(1)->setNodeMask(1);

			}

			break;

		default:

			break;

		}

		return false;

	}

};

void main()

{

	osgViewer::Viewer viewer;

	osg::ref_ptr<osg::Group> root = new osg::Group();

	root->addChild(osgDB::readNodeFile("cow.osg"));

	root->addChild(osgDB::readNodeFile("glider.osg"));

	viewer.setSceneData(root.get());

	viewer.addEventHandler(new UseEventHandler);

	viewer.realize();

	viewer.run();

}

结果图：

巴特西

OSG学习：响应键盘鼠标示例

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