79 lines
2.1 KiB
C#
79 lines
2.1 KiB
C#
using System;
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using UnityEngine;
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namespace AibisDream.Framework
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{
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public class MoveableSystem : MonoBehaviour
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{
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private bool _isDragging;
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private IMoveable _dragObj;
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private Vector3 _offset;
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private Camera _camera;
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private void Start()
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{
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_camera = Camera.main;
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}
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private void Update()
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{
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// 鼠标按下
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if (Input.GetMouseButtonDown(0))
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{
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OnMouseClickDown();
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}
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// 鼠标按住
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if (Input.GetMouseButton(0) && _isDragging)
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{
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OnMouseHolding();
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}
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// 鼠标松开
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if (Input.GetMouseButtonUp(0))
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{
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OnMouseClickUp();
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}
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}
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private void OnMouseClickDown()
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{
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// 按下时发出检查射线
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Ray ray = _camera.ScreenPointToRay(Input.mousePosition);
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RaycastHit2D hit = Physics2D.Raycast(ray.origin, ray.direction);
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// 检测命中的物体
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if (hit.collider && hit.collider.CompareTag("Moveable"))
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{
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_dragObj = hit.collider.gameObject.GetComponent<IMoveable>();
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if (_dragObj == null) return;
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_dragObj.StartMove();
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_offset = hit.collider.transform.position - GetMouseAsWorldPoint();
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_isDragging = true;
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}
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}
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private void OnMouseHolding()
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{
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_dragObj.Move(GetMouseAsWorldPoint() + _offset);
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}
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private void OnMouseClickUp()
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{
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if (!_isDragging) return;
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_dragObj?.StopMove();
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_dragObj = null;
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_isDragging = false;
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}
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private Vector3 GetMouseAsWorldPoint()
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{
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Vector3 mousePoint = Input.mousePosition;
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mousePoint.z = _camera.nearClipPlane;
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return _camera.ScreenToWorldPoint(mousePoint);
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}
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}
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} |