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using System.Collections;
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using System.Collections.Generic;
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using UnityEngine;
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namespace BuildSystem {
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public class MouseClick : MonoBehaviour
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{
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public Transform ground;
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public Camera camera;
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RaycastHit raycastHit;
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/// <summary>
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/// 返回鼠标在地图上的坐标
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/// </summary>
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/// <returns></returns>
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public Vector3Int MouseInGrid() {
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Vector3 groundPos = camera.WorldToScreenPoint(ground.transform.position);
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Vector3 mousePos = new Vector3(Input.mousePosition.x, Input.mousePosition.y, groundPos.z);
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Vector3 worldMousePos = camera.ScreenToWorldPoint(mousePos);
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Ray ray = new Ray(camera.transform.position, worldMousePos - camera.transform.position);
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//Debug.DrawRay(camera.transform.position, worldMousePos - camera.transform.position,Color.blue);
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int layerMask = (1 << 8);
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layerMask = ~layerMask; //取消obj层防止遮挡
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if (Physics.Raycast(ray, out raycastHit,1000f ,layerMask))
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{
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if (raycastHit.collider.tag == "Map")
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{
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//Debug.Log(WorldInGrid(raycastHit.point));
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return WorldInGrid(raycastHit.point);
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}
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}
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return new Vector3Int(-1,-1,-1);
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}
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/// <summary>
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/// 给定一个世界坐标，判断坐标位于哪个grid
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/// </summary>
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/// <param name="pos"></param>
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/// <returns></returns>
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Vector3Int WorldInGrid(Vector3 pos)
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{
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Vector3 gridSpace = pos - BuildSystemManager.Instance.startPos;
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int x = (int)(gridSpace.x / BuildSystemManager.Instance.gridSize);
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int z = (int)(gridSpace.z / BuildSystemManager.Instance.gridSize);
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return new Vector3Int(x,0,z);
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}
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}
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}
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