three.js 物体随鼠标移动

代码

　　　　　var startX,endX;

var isDown = false;
        var changeBefore = 0;
        function addTouchListener() {
            document.onmousedown = function (event) {
                startX = event.clientX;
                isDown = true;
            };
            document.onmouseup = function(event){
                isDown = false;
            };
            document.onmousemove = function (event) {
                if (isDown) {
                    if(changeBefore != 0){
                        if(changeBefore > event.clientX){
                            mesh.rotation.y = mesh.rotation.y + 0.1;
                        }else{
                            mesh.rotation.y = mesh.rotation.y - 0.1;
                        }
                    }
                    endX = event.clientX;
                    changeBefore = endX;
                }
            };
        }

 mesh改成自己的几何体，页面用

requestAnimationFrame( animate );

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