学步园

PositionAttitudeTransform  MatrixTransform 使用：

#include "stdafx.h"

#include "../include/LoadLib.h"
#include <osg/vec3>
#include <osg/PositionAttitudeTransform>
#include <osg/MatrixTransform>
#include <osg/Node>
#include <osg/Geode>
#include <osg/Group>
#include <osgDB/ReadFile>
#include <osgViewer/viewer>
#include <osgUtil/optimizer>
#include <osg/Matrix>


int _tmain(int argc, _TCHAR* argv[])
{
    osg::ref_ptr<osgViewer::Viewer> viewer = new osgViewer::Viewer();
    osg::ref_ptr<osg::Group> root = new osg::Group();
    osg::ref_ptr<osg::PositionAttitudeTransform> pat1 = new osg::PositionAttitudeTransform();
    osg::ref_ptr<osg::PositionAttitudeTransform> pat2 = new osg::PositionAttitudeTransform();
    osg::ref_ptr<osg::Node> cow = osgDB::readNodeFile("cow.osg");
    pat1->setPosition(osg::Vec3(-10.0f,0.0f,0.0f));
    pat1->setScale(osg::Vec3(5.0f,5.0f,5.0f));
    pat1->addChild(cow.get());

    pat2->setPosition(osg::Vec3(15.0f,0.0f,0.0f));
    pat2->addChild(cow.get());

    osg::ref_ptr<osg::MatrixTransform> Mt = new osg::MatrixTransform();
    Mt->addChild(pat1);
    osg::Matrix m1;
    m1.makeRotate(90.0f*osg::PI/180.0f,osg::Vec3(1.0f,0.0f,0.0f));  
    osg::Matrix m2;
    m2.makeTranslate(-10.0f,10.0f,0.0f);
    m1.preMult(m2); 
    Mt->setMatrix(m1);
    root->addChild(Mt.get());
    //root->addChild(pat1.get());
    root->addChild(pat2.get());

    osgUtil::Optimizer optimizer;
    optimizer.optimize(root.get());
    
    viewer->setSceneData(root.get());
    //viewer->realize();
    viewer->run();
    return 0;
}

效果图：






问题：Matrix的使用还不是很熟，有时间在研究研究。