写一个适配安卓手机端的旋转 缩放 平移

要在安卓手机端适配旋转、缩放和平移功能，你可以使用 Unity 的输入系统和触摸事件来实现。以下是一个示例代码：

using UnityEngine;

public class MobileInput : MonoBehaviour
{
    private Touch touch;
    private Vector2 touchStartPos;
    private Vector3 objectStartPos;
    private float pinchStartDistance;
    private float pinchZoomSpeed = 0.01f;
    private float rotationSpeed = 0.2f;
    private float translationSpeed = 0.1f;

    void Update()
    {
        if (Input.touchCount == 1)
        {
            // 单指触摸时平移物体
            touch = Input.GetTouch(0);

            if (touch.phase == TouchPhase.Began)
            {
                touchStartPos = touch.position;
                objectStartPos = transform.position;
            }
            else if (touch.phase == TouchPhase.Moved)
            {
                Vector2 touchDelta = touch.deltaPosition;
                Vector3 translation = new Vector3(touchDelta.x, 0, touchDelta.y) * translationSpeed;

                transform.position = objectStartPos + translation;
            }
        }
        else if (Input.touchCount == 2)
        {
            // 双指触摸时旋转和缩放物体
            Touch touch1 = Input.GetTouch(0);
            Touch touch2 = Input.GetTouch(1);

            if (touch1.phase == TouchPhase.Began || touch2.phase == TouchPhase.Began)
            {
                pinchStartDistance = Vector2.Distance(touch1.position, touch2.position);
            }
            else if (touch1.phase == TouchPhase.Moved || touch2.phase == TouchPhase.Moved)
            {
                Vector2 touch1PrevPos = touch1.position - touch1.deltaPosition;
                Vector2 touch2PrevPos = touch2.position - touch2.deltaPosition;

                float prevDistance = Vector2.Distance(touch1PrevPos, touch2PrevPos);
                float currentDistance = Vector2.Distance(touch1.position, touch2.position);

                float pinchDistanceDelta = prevDistance - currentDistance;

                // 缩放物体
                transform.localScale += new Vector3(pinchDistanceDelta, pinchDistanceDelta, pinchDistanceDelta) * pinchZoomSpeed;

                // 旋转物体
                Vector2 midPoint = (touch1.position + touch2.position) / 2f;
                Vector2 prevMidPoint = (touch1PrevPos + touch2PrevPos) / 2f;

                Vector2 touchDelta = midPoint - prevMidPoint;
                transform.Rotate(Vector3.up, -touchDelta.x * rotationSpeed, Space.World);
            }
        }
    }
}

将以上代码添加到一个物体上，然后在场景中将需要控制的物体作为该物体的子物体。在安卓手机端运行游戏时，你可以使用单指触摸来平移物体，使用双指触摸来旋转和缩放物体。可以根据需要调整缩放、旋转和平移的速度。