osgManipulator.Translate2DDragger

概述

osgManipulator.Translate2DDragger是OpenSceneGraph中的一个Manipulator（处理器）类，具有平移物体的功能。它用于移动二维平面中的对象。

使用方法

1. 在代码中包含osgManipulator.h文件。
2. 创建Translate2DDragger对象。
3. 添加Translate2DDragger对象到场景图中。
4. 添加需要平移的对象到场景图中。
5. 将需要平移的对象设置为Translate2DDragger的拖动目标。

示例代码

#include <osgManipulator/Translate2DDragger>
#include <osgManipulator/Dragger>
#include <osg/MatrixTransform>
#include <osgViewer/Viewer>

int main()
{
    osg::ref_ptr<osgManipulator::Translate2DDragger> dragger = 
        new osgManipulator::Translate2DDragger;

    osg::ref_ptr<osg::MatrixTransform> transform = 
        new osg::MatrixTransform(osg::Matrix::translate(osg::Vec3(0, 0, 0)));
    transform->addChild(dragger);

    osg::ref_ptr<osgManipulator::Dragger> axisDragger = dragger->createDragger(0);
    osg::ref_ptr<osg::MatrixTransform> axisTransform = 
        new osg::MatrixTransform(osg::Matrix::translate(osg::Vec3(1, 1, 0)));
    axisTransform->addChild(axisDragger);

    osg::ref_ptr<osg::Geode> modelGeode = new osg::Geode;
    modelGeode->addDrawable(new osg::ShapeDrawable(new osg::Box(osg::Vec3(0,0,0),1)));
    transform->addChild(modelGeode);

    osg::ref_ptr<osg::Group> root = new osg::Group;
    root->addChild(transform);
    root->addChild(axisTransform);

    dragger->setHandleEvents(true);
    dragger->setActivationKeyEvent('t');

    osgViewer::Viewer viewer;
    viewer.setSceneData(root);
    viewer.run();
    return 0;
}

参考资料

[1] OpenSceneGraph Reference Documentation. https://www.openscenegraph.org/documentation/osg/index.html.

[2] OpenSceneGraph GitHub Repository. https://github.com/openscenegraph/OpenSceneGraph.

[3] osgManipulator.Translate2DDragger Class Reference. https://www.openscenegraph.org/documentation/osgManipulator/classosgManipulator_1_1Translate2DDragger.html.