我正在处理一个Unity3d项目,需要在按下某个键时在同一位置和方向上动态添加3D对象到场景中。为此,我导入了这些对象并制作了所有对象的预制件。我使用以下脚本进行操作,但它并不能达到预期的效果。新对象被实例化并添加到场景中,但旧对象没有被销毁。而且,新对象的位置不总是相同的。场景最初由一个立方体组成。当我按下“1”、“2”等键时,我希望一个新的对象替换显示的1(在同一位置)。
脚本:
var myCar : GameObject;
var Cube : GameObject;
var Globe: GameObject;
var Clock : GameObject;
var Pistol : GameObject;
var LCD : GameObject;
var prev : int;
var temp: GameObject;
function Start ()
{
prev =0;
temp=null;
}
function Update ()
{
if(prev==0)
temp=Cube;
else if(prev==1)
temp=myCar;
else if(prev==2)
temp=Globe;
else if(prev==3)
temp=Pistol;
else if(prev==4)
temp=Clock;
else if(prev==5)
temp=LCD;
if(Input.GetKey(KeyCode.Alpha1 || KeyCode.Keypad1))
{
if(prev!=1)
{
Instantiate(myCar,temp.transform.position ,temp.transform.rotation);
myCar.transform.localScale = Vector3(0.06,0.06,0.06);
Destroy(temp);
prev=1;
}
}
else if(Input.GetKey(KeyCode.Alpha2 || KeyCode.Keypad2))
{
if(prev!=2)
{
Instantiate(Globe,temp.transform.position ,temp.transform.rotation);
Globe.transform.localScale = Vector3(0.04,0.04,0.04);
Destroy(temp);
prev=2;
}
}
else if(Input.GetKey(KeyCode.Alpha3 || KeyCode.Keypad3))
{
if(prev!=3)
{
Instantiate(Pistol,temp.transform.position ,temp.transform.rotation);
Pistol.transform.localScale = Vector3(0.03,0.03,0.03);
Destroy(temp);
prev =3;
}
}
else if(Input.GetKey(KeyCode.Alpha4 || KeyCode.Keypad4))
{
if(prev!=4)
{
Instantiate(Clock,temp.transform.position ,temp.transform.rotation);
Clock.transform.localScale = Vector3(0.08,0.08,0.08);
Destroy(temp);
prev=4;
}
}
else if(Input.GetKey(KeyCode.Alpha5 || KeyCode.Keypad5))
{
if(prev!=5)
{
Instantiate(LCD,temp.transform.position ,temp.transform.rotation);
LCD.transform.localScale = Vector3(0.04,0.04,0.04);
Destroy(temp);
prev=5;
}
}
}