function get_multiViewportMode() : MultiViewportMode
function set_multiViewportMode(value : MultiViewportMode )
                                                

var resultVar = instanceOfScene.get_multiViewportMode();

    设置场景为水平跨越多视口模式，值为1 

function setmultiViewportMode(){


     scene.open("http://localhost:8090/iserver/services/3D-sample/rest/realspace","scene_CBD");
     scene.set_multiViewportMode(1);
}
 
    设置场景为垂直跨越多视口模式 ，值为2
function setmultiViewportMode1(){

     scene.open("http://localhost:8090/iserver/services/3D-sample/rest/realspace","scene_CBD");
     scene.set_multiViewportMode(2);
}
 
    设置场景为四视口模式，值为3

function setmultiViewportMode2(){


     scene.open("http://localhost:8090/iserver/services/3D-sample/rest/realspace","scene_CBD");
     scene.set_multiViewportMode(3);
}
 
    设置场景为水平方向上的三分屏视口模式，值为4 

function setmultiViewportMode3(){

 
     scene.open("http://localhost:8090/iserver/services/3D-sample/rest/realspace","scene_CBD");
     scene.set_multiViewportMode(4);
}