这是一段拖动物体的代码，比较简洁明了，对了解unity3d脚本概念有些帮助！在此加上注释分享！
02 var mouseOverColor = Color.blue;//声明变量为蓝色
03 private var originalColor : Color;//声明变量存储本来颜色
04 function Start () {
05 originalColor = renderer.sharedMaterial.color;//开始时得到物体本来着色
06 }
07 function OnMouseEnter () {
08 renderer.material.color = mouseOverColor;//当鼠标滑过时改变物体颜色为蓝色
09 }
10
11 function OnMouseExit () {
12 renderer.material.color = originalColor;//当鼠标滑出时恢复物体本来颜色
13 }
14
15 function OnMouseDown () {
16 var screenSpace = Camera.main.WorldToScreenPoint(transform.position);//三维物体坐标转屏幕坐标
17 //将鼠标屏幕坐标转为三维坐标，再算出物体位置与鼠标之间的距离
18 var offset = transform.position - Camera.main.ScreenToWorldPoint(Vector3(Input.mousePosition.x, Input.mousePosition.y, screenSpace.z));
19 print("down");
20 while (Input.GetMouseButton(0))
21 {
22 //print("button0");
23 var curScreenSpace = Vector3(Input.mousePosition.x, Input.mousePosition.y, screenSpace.z);
24 var curPosition = Camera.main.ScreenToWorldPoint(curScreenSpace) + offset;
25 transform.position = curPosition;
26 yield;//这个很重要，循环执行
27 }
28 }
JS脚本格式……明天改成C#的试试
