THREEJS(版本85)实现鼠标点击的高亮显示(如颜色变化)

时间:2024-04-09 16:53:28

啥也不多说,看效果图:

THREEJS(版本85)实现鼠标点击的高亮显示(如颜色变化)

鼠标点击时,发生颜色变化(可以引申出去做很多其他的操作)

THREEJS(版本85)实现鼠标点击的高亮显示(如颜色变化)

代码:首先初始化:

var  objects=[];
var raycaster= new THREE.Raycaster();
var mouse = new THREE.Vector2(),
        INTERSECTED, SELECTED;

需要把你要实现的效果的geometry加载到objects中

var shape32=createMesh(lines[32]);
objects.push(shape32);
scene.add(shape32);
注:createMesh自己随便写的

鼠标点击事件:

function onDocumentMouseDown( event ) {

    event.preventDefault();
    document.addEventListener( 'mousemove', onDocumentMouseMove, false );
    document.addEventListener( 'mouseup', onDocumentMouseUp, false );
    document.addEventListener( 'mouseout', onDocumentMouseOut, false );

    //鼠标点的拾取-当鼠标点击效果时,放在这里
    mouse.x = ( event.clientX / window.innerWidth ) * 2 - 1;//threejs坐标点的标准化
    mouse.y = - ( event.clientY / window.innerHeight) * 2 + 1;

    raycaster.setFromCamera( mouse, camera );
    var intersects = raycaster.intersectObjects( objects );
    //拾取物体数大于0    if ( intersects.length > 0 ) {

        //获取第一个物体
        if (SELECTED != intersects[0].object) {
            //鼠标的变换
            document.body.style.cursor='pointer';
            /*intersects[ 0 ].object.material.transparent=true;//透明度的变化
             intersects[ 0 ].object.material.opacity=0.5;*/
            if (SELECTED) SELECTED.material.color.setHex(SELECTED.currentHex);
            SELECTED = intersects[0].object;
            SELECTED.currentHex = SELECTED.material.color.getHex();//记录当前选择的颜色
            //改变物体的颜色(红色)
            SELECTED.material.color.set( 0x66ff00 );
        }
    } else {
        document.body.style.cursor= 'auto';
        if (SELECTED) SELECTED.material.color.set(SELECTED.currentHex);//恢复选择前的默认颜色
        SELECTED = null;
    }
}

完美**********************************************************************华丽分割线*******************************************************************************END