358 lines
11 KiB
C#
358 lines
11 KiB
C#
using UnityEngine;
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public class ModelViewerOrbitCamera : MonoBehaviour
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{
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[Header("观察目标")]
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[SerializeField] private Transform target; // 要观察的模型
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[Header("旋转设置")]
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[SerializeField] private float rotationSpeed = 5.0f;
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[SerializeField] private float autoRotationSpeed = 0.5f;
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[SerializeField] private float rotationSmoothness = 5.0f;
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[Header("缩放设置")]
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[SerializeField] private float zoomSpeed = 5.0f;
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[SerializeField] private float minZoomDistance = 1.0f;
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[SerializeField] private float maxZoomDistance = 20.0f;
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[SerializeField] private float defaultZoomDistance = 5.0f;
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[Header("平移设置")]
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[SerializeField] private float panSpeed = 0.5f;
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[Header("自动旋转")]
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[SerializeField] private bool enableAutoRotation = false;
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[Header("鼠标控制")]
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[SerializeField] private MouseButton rotateButton = MouseButton.Left;
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[SerializeField] private MouseButton panButton = MouseButton.Middle;
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[SerializeField] private float mouseSensitivity = 1.0f;
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[Header("触摸屏控制")]
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[SerializeField] private float touchSensitivity = 0.5f;
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[Header("边界限制")]
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[SerializeField] private Vector2 verticalAngleLimit = new Vector2(10f, 80f);
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private Vector3 currentRotation = Vector3.zero;
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private Vector3 targetRotation = Vector3.zero;
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private float currentDistance = 5.0f;
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private float targetDistance = 5.0f;
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private Vector3 targetPositionOffset = Vector3.zero;
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private Vector3 currentTargetPositionOffset = Vector3.zero;
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private Vector3 lastMousePosition = Vector3.zero;
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private Vector3 lastPanPosition = Vector3.zero;
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private enum MouseButton
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{
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Left = 0,
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Right = 1,
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Middle = 2
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}
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void Start()
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{
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// 如果未指定目标，尝试查找
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if (target == null)
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{
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// 可以在这里添加自动查找模型的逻辑
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// 例如：target = GameObject.Find("Model").transform;
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}
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// 初始化距离
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currentDistance = defaultZoomDistance;
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targetDistance = defaultZoomDistance;
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// 初始化旋转
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Vector3 angles = transform.eulerAngles;
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currentRotation = new Vector3(angles.y, angles.x, 0);
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targetRotation = currentRotation;
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// 计算初始位置
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UpdateCameraPosition();
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}
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void LateUpdate()
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{
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if (target == null) return;
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HandleInput();
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UpdateCameraPosition();
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}
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private void HandleInput()
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{
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// 处理桌面端输入
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HandleDesktopInput();
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// 处理移动端输入
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HandleTouchInput();
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}
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private void HandleDesktopInput()
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{
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// 旋转控制
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if (Input.GetMouseButton((int)rotateButton))
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{
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float horizontal = Input.GetAxis("Mouse X") * rotationSpeed * mouseSensitivity;
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float vertical = -Input.GetAxis("Mouse Y") * rotationSpeed * mouseSensitivity;
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targetRotation.x += horizontal;
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targetRotation.y += vertical;
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// 限制垂直角度
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targetRotation.y = Mathf.Clamp(targetRotation.y, verticalAngleLimit.x, verticalAngleLimit.y);
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// 停止自动旋转
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enableAutoRotation = false;
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}
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// 平移控制
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if (Input.GetMouseButton((int)panButton))
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{
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if (Input.GetMouseButtonDown((int)panButton))
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{
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lastPanPosition = Input.mousePosition;
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}
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Vector3 delta = Input.mousePosition - lastPanPosition;
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// 计算平移方向（基于相机的右和上方向）
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Vector3 right = transform.right;
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Vector3 up = transform.up;
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right.y = 0; // 保持水平平移
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up.y = 0;
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targetPositionOffset -= (right * delta.x + up * delta.y) * panSpeed * 0.01f;
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lastPanPosition = Input.mousePosition;
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}
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// 缩放控制
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float scroll = Input.GetAxis("Mouse ScrollWheel");
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if (Mathf.Abs(scroll) > 0.01f)
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{
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targetDistance -= scroll * zoomSpeed;
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targetDistance = Mathf.Clamp(targetDistance, minZoomDistance, maxZoomDistance);
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}
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// 重置按钮
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if (Input.GetKeyDown(KeyCode.R))
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{
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ResetView();
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}
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// 自动旋转切换
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if (Input.GetKeyDown(KeyCode.A))
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{
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enableAutoRotation = !enableAutoRotation;
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}
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}
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private void HandleTouchInput()
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{
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#if UNITY_IOS || UNITY_ANDROID || UNITY_WEBGL
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if (Input.touchCount == 1)
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{
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Touch touch = Input.GetTouch(0);
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if (touch.phase == TouchPhase.Moved)
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{
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Vector2 delta = touch.deltaPosition;
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targetRotation.x += delta.x * rotationSpeed * touchSensitivity * 0.1f;
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targetRotation.y -= delta.y * rotationSpeed * touchSensitivity * 0.1f;
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// 限制垂直角度
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targetRotation.y = Mathf.Clamp(targetRotation.y, verticalAngleLimit.x, verticalAngleLimit.y);
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}
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}
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else if (Input.touchCount == 2)
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{
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Touch touchZero = Input.GetTouch(0);
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Touch touchOne = Input.GetTouch(1);
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Vector2 touchZeroPrevPos = touchZero.position - touchZero.deltaPosition;
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Vector2 touchOnePrevPos = touchOne.position - touchOne.deltaPosition;
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float prevTouchDeltaMag = (touchZeroPrevPos - touchOnePrevPos).magnitude;
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float touchDeltaMag = (touchZero.position - touchOne.position).magnitude;
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float deltaMagnitudeDiff = prevTouchDeltaMag - touchDeltaMag;
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targetDistance += deltaMagnitudeDiff * zoomSpeed * 0.01f;
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targetDistance = Mathf.Clamp(targetDistance, minZoomDistance, maxZoomDistance);
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}
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#endif
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}
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private void UpdateCameraPosition()
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{
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// 自动旋转
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if (enableAutoRotation)
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{
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targetRotation.x += autoRotationSpeed;
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}
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// 应用旋转平滑
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currentRotation = Vector3.Lerp(currentRotation, targetRotation, rotationSmoothness * Time.deltaTime);
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// 应用距离平滑
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currentDistance = Mathf.Lerp(currentDistance, targetDistance, rotationSmoothness * Time.deltaTime);
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// 应用平移平滑
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currentTargetPositionOffset = Vector3.Lerp(currentTargetPositionOffset, targetPositionOffset, rotationSmoothness * Time.deltaTime);
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// 计算旋转
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Quaternion rotation = Quaternion.Euler(currentRotation.y, currentRotation.x, 0);
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// 计算位置
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Vector3 position = rotation * new Vector3(0, 0, -currentDistance) + target.position + currentTargetPositionOffset;
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// 应用变换
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transform.position = position;
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transform.LookAt(target.position + currentTargetPositionOffset);
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// 可选：使相机稍微向上看
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// transform.LookAt(target.position + currentTargetPositionOffset + Vector3.up * 0.5f);
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}
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// 公共方法
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/// <summary>
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/// 重置视角
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/// </summary>
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public void ResetView()
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{
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targetRotation = new Vector3(0, 45f, 0); // 默认视角
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targetDistance = defaultZoomDistance;
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targetPositionOffset = Vector3.zero;
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enableAutoRotation = false;
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}
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/// <summary>
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/// 聚焦到模型
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/// </summary>
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public void FocusOnModel()
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{
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if (target != null)
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{
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targetPositionOffset = Vector3.zero;
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}
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}
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/// <summary>
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/// 设置观察目标
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/// </summary>
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public void SetTarget(Transform newTarget)
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{
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target = newTarget;
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ResetView();
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}
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/// <summary>
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/// 设置观察目标
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/// </summary>
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public void SetTarget(GameObject newTarget)
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{
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if (newTarget != null)
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{
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target = newTarget.transform;
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ResetView();
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}
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}
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/// <summary>
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/// 设置观察目标的中心点
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/// </summary>
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public void SetTargetOffset(Vector3 offset)
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{
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targetPositionOffset = offset;
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}
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/// <summary>
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/// 设置缩放距离
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/// </summary>
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public void SetZoomDistance(float distance)
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{
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targetDistance = Mathf.Clamp(distance, minZoomDistance, maxZoomDistance);
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}
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/// <summary>
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/// 设置旋转角度
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/// </summary>
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public void SetRotation(float horizontal, float vertical)
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{
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targetRotation = new Vector3(horizontal, Mathf.Clamp(vertical, verticalAngleLimit.x, verticalAngleLimit.y), 0);
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}
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/// <summary>
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/// 切换自动旋转
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/// </summary>
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public void ToggleAutoRotation(bool enable)
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{
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enableAutoRotation = enable;
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}
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/// <summary>
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/// 设置自动旋转速度
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/// </summary>
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public void SetAutoRotationSpeed(float speed)
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{
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autoRotationSpeed = speed;
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}
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// 编辑器调试信息
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void OnGUI()
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{
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if (Application.isEditor)
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{
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GUI.Label(new Rect(10, 10, 300, 20),
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$"上帝视角观察器 - 模型查看器");
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if (target != null)
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{
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GUI.Label(new Rect(10, 30, 300, 20),
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$"目标: {target.name}");
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}
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else
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{
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GUI.Label(new Rect(10, 30, 300, 20),
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"目标: 未设置 (请在Inspector中指定)");
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}
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GUI.Label(new Rect(10, 50, 300, 20),
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$"旋转: ({currentRotation.x:F1}, {currentRotation.y:F1})");
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GUI.Label(new Rect(10, 70, 300, 20),
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$"距离: {currentDistance:F1}");
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GUI.Label(new Rect(10, 90, 300, 20),
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$"自动旋转: {(enableAutoRotation ? "开" : "关")}");
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GUI.Label(new Rect(10, 120, 400, 20),
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"控制说明:");
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GUI.Label(new Rect(10, 140, 400, 20),
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"左键拖拽: 旋转视角");
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GUI.Label(new Rect(10, 160, 400, 20),
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"中键拖拽: 平移视角");
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GUI.Label(new Rect(10, 180, 400, 20),
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"滚轮: 缩放");
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GUI.Label(new Rect(10, 200, 400, 20),
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"R键: 重置视角");
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GUI.Label(new Rect(10, 220, 400, 20),
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"A键: 切换自动旋转");
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}
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}
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// 在Scene视图中绘制辅助线
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void OnDrawGizmosSelected()
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{
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if (target != null)
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{
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Gizmos.color = Color.yellow;
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Gizmos.DrawWireSphere(target.position + currentTargetPositionOffset, 0.5f);
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Gizmos.DrawLine(target.position + currentTargetPositionOffset, transform.position);
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}
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}
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} |