增加多指触控支持

Assets/Scripts/Item/Show3DCamera.cs

@@ -43,6 +43,7 @@ public class Show3DCamera : MonoBehaviour
     Transform target;
     Vector3 targetPosition;
     Vector3 targetRotate;
+    private float prevTouchDistance; // 存储上一帧双指距离
     private void Awake()
     {
         instance = this;
@@ -124,28 +125,43 @@ public class Show3DCamera : MonoBehaviour
         UpdateCameraPosition(-1);
     }
 
+
     void Update()
     {
         if (targetPos != null && lockMove == false && EventSystem.current.IsPointerOverGameObject() == false)
         {
+            // 优先处理三指操作
+            if (HandleThreeFingerDrag()) return;
+            bool isTouching = Input.touchCount > 0;
 
-
+            // 新增：在旋转前先处理双指缩放
-            if (Input.GetMouseButtonDown(0))
+            bool isZooming = false;
+            if (isTouching && Input.touchCount == 2)
+            {
+                HandleTouchZoom();
+                isZooming = true; // 标记正在缩放
+            }
+
+            // 处理触摸开始（排除双指情况）
+            if (isTouching && Input.touchCount == 1)
+            {
+                if (Input.GetTouch(0).phase == TouchPhase.Began)
+                {
+                    mouseDownPosition = Input.GetTouch(0).position;
+                }
+            }
+            // 处理鼠标按下
+            else if (Input.GetMouseButtonDown(0))
             {
-                // 记录鼠标按下时的位置
                 mouseDownPosition = Input.mousePosition;
             }
 
-            // 按住鼠标左键时旋转相机
+            // 修改后的旋转条件（排除缩放状态）
-            if (Input.GetMouseButton(0))
+            if (!isZooming && (isTouching ? (Input.GetTouch(0).phase == TouchPhase.Moved) : Input.GetMouseButton(0)))
-            {
-                // 计算鼠标按下和抬起位置之间的距离
-                float distance = Vector2.Distance(mouseDownPosition, Input.mousePosition);
-                if (distance > 1f)
             {
+                // 移除距离判断直接响应
                 RotateCamera();
             }
-            }
 
             // 鼠标滚轮缩放
             float scroll = Input.GetAxis("Mouse ScrollWheel");
@@ -154,7 +170,6 @@ public class Show3DCamera : MonoBehaviour
                 ZoomCamera(scroll);
             }
 
-
             // 按住鼠标右键时移动目标点
             if (Input.GetMouseButton(1))
             {
@@ -163,6 +178,91 @@ public class Show3DCamera : MonoBehaviour
             DetectHoveredObject();
         }
     }
+    // 唯一的三指处理方法（返回bool用于阻断其他操作）
+    private bool HandleThreeFingerDrag()
+    {
+        if (Input.touchCount == 5)
+        {
+            // 计算三个触点的平均移动量
+            Vector2 totalDelta = Vector2.zero;
+            foreach (Touch t in Input.touches)
+            {
+                totalDelta += t.deltaPosition;
+            }
+            Vector2 delta = totalDelta / 3f;
+
+            // DPI自适应处理
+            float dpiScale = Screen.dpi == 0 ? 1 : Screen.dpi / 160f;
+            float sensitivity = moveSpeed * 0.1f / dpiScale;
+
+            // 应用移动阈值（2像素）
+            if (delta.magnitude > 2f)
+            {
+                // 调用修改后的移动方法
+                MoveTarget(delta.x * sensitivity, delta.y * sensitivity);
+            }
+
+            // 阻断其他触摸操作
+            return true;
+        }
+        return false;
+    }
+
+
+    // 新增双指缩放处理方法
+    // 类变量区添加
+    private float zoomSmoothVelocity; // 平滑速度缓存
+    [SerializeField] private float zoomSmoothTime = 0.1f; // 缩放平滑时间
+    private void HandleTouchZoom()
+    {
+        if (Input.touchCount == 2)
+        {
+            Touch touch0 = Input.GetTouch(0);
+            Touch touch1 = Input.GetTouch(1);
+            // 当双指操作时重置旋转相关变量
+            if (touch0.phase == TouchPhase.Began || touch1.phase == TouchPhase.Began)
+            {
+                yaw = transform.eulerAngles.y;  // 保持当前旋转角度
+                pitch = transform.eulerAngles.x;
+                mouseDownPosition = Vector2.zero;
+            }
+
+            Vector2 touch0Pos = touch0.position;
+            Vector2 touch1Pos = touch1.position;
+            float currentDistance = Vector2.Distance(touch0Pos, touch1Pos);
+
+            // DPI自适应计算
+            float dpi = Screen.dpi == 0 ? 200 : Screen.dpi;
+            float zoomFactor = 0.01f * (200 / dpi); // 基准DPI为200
+
+            if (touch0.phase == TouchPhase.Began || touch1.phase == TouchPhase.Began)
+            {
+                prevTouchDistance = currentDistance;
+                zoomSmoothVelocity = 0; // 重置平滑速度
+            }
+            else if (touch0.phase == TouchPhase.Moved || touch1.phase == TouchPhase.Moved)
+            {
+                float deltaDistance = currentDistance - prevTouchDistance;
+
+                // 仅触摸缩放使用平滑
+                float targetDistance = distance - deltaDistance * zoomFactor;
+                targetDistance = Mathf.Clamp(targetDistance, distanceMin, distanceMax);
+
+                distance = Mathf.SmoothDamp(
+                    distance,
+                    targetDistance,
+                    ref zoomSmoothVelocity,
+                    zoomSmoothTime
+                );
+
+                offset = new Vector3(0, 0, -distance);
+                UpdateCameraPosition();
+
+                prevTouchDistance = currentDistance;
+            }
+        }
+    }
+
 
     // 检测鼠标悬停的物体
     public void DetectHoveredObject()
@@ -252,11 +352,15 @@ public class Show3DCamera : MonoBehaviour
 
     }
 
-    // 移动目标点
+    // 修改后的移动方法（统一处理输入源）
-    private void MoveTarget()
+    private void MoveTarget(float mouseX = 0, float mouseY = 0)
     {
-        float mouseX = Input.GetAxis("Mouse X") * moveSpeed;
+        // 自动判断输入源
-        float mouseY = Input.GetAxis("Mouse Y") * moveSpeed;
+        if (Mathf.Approximately(mouseX, 0) && Mathf.Approximately(mouseY, 0))
+        {
+            mouseX = Input.GetAxis("Mouse X") * moveSpeed;
+            mouseY = Input.GetAxis("Mouse Y") * moveSpeed;
+        }
 
         transform.Translate(new Vector3(-mouseX, -mouseY, 0));
         targetPos += new Vector3(-mouseX, -mouseY, 0);
@@ -270,31 +374,44 @@ public class Show3DCamera : MonoBehaviour
         UpdateCameraPosition();
     }
 
-    // 旋转相机
+    // 修改RotateCamera方法
     private void RotateCamera()
     {
-        // 获取鼠标移动量
+        // 优先使用触摸输入
-        float mouseX = Input.GetAxis("Mouse X") * rotateSpeed;
+        float deltaX = 0, deltaY = 0;
-        float mouseY = Input.GetAxis("Mouse Y") * rotateSpeed;
+
+        // 触屏处理
+        if (Input.touchCount == 1)
+        {
+            Touch touch = Input.GetTouch(0);
+            deltaX = touch.deltaPosition.x;
+            deltaY = touch.deltaPosition.y;
+        }
+        // 鼠标处理
+        else
+        {
+            deltaX = Input.GetAxis("Mouse X") * 10; // 保持原有灵敏度
+            deltaY = Input.GetAxis("Mouse Y") * 10;
+        }
+
+        // 应用DPI缩放（关键！）
+        float dpiScale = Screen.dpi == 0 ? 1 : Screen.dpi / 160f;
+        deltaX *= rotateSpeed * Time.deltaTime / dpiScale;
+        deltaY *= rotateSpeed * Time.deltaTime / dpiScale;
+
         switch (type)
         {
             case RotationType.Orbit:
-
+                yaw += deltaX;
-                // 更新偏航角和俯仰角
+                pitch -= deltaY;
-                yaw += mouseX;
+                pitch = Mathf.Clamp(pitch, pitchMinMax.x, pitchMinMax.y);
-                pitch -= mouseY; // 注意：鼠标 Y 轴移动方向与俯仰角相反
-                pitch = Mathf.Clamp(pitch, pitchMinMax.x, pitchMinMax.y); // 限制俯仰角范围
-
-                // 更新相机位置
                 UpdateCameraPosition();
                 break;
             case RotationType.Spherical:
-                // 完全自由的旋转（包含X/Y/Z三个轴向）
+                target.Rotate(Vector3.up, deltaX, Space.World);
-                target.Rotate(Vector3.up, mouseX, Space.World);    // 水平方向世界Y轴旋转
+                target.Rotate(Vector3.right, -deltaY, Space.Self);
-                target.Rotate(Vector3.right, -mouseY, Space.Self); // 垂直方向本地X轴旋转
                 break;
         }
-
     }
 
     public void ChangeMode(RotationType type)