Unity_使用Image和脚本生成虚线段

生成如图样式的虚线段

原理：使用Image做一条线段，这个方法的原理就是给固定的片元长度，对Image进行分割，把片元添加到一个列表中，然后循环对列表中的偶数位进行隐藏，也可以调整线段的宽度

缺陷：有曲线折线的时候，要对每个片元再做旋转位移等操作，且效果不太理想，所以对直线最方便

代码如下：

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;public class DashLineDraw : MonoBehaviour
{public static DashLineDraw _dashlineInstance;public Image TargetWellWidth;//井径public Image TargetWellPosition;//方位public Image TargetWellincline;//井斜public int WidthpieceLength,inclineLength;//固定线的片元长度private void Awake(){_dashlineInstance = this;WidthpieceLength = 5;inclineLength = 10;DashLine(TargetWellWidth, WidthpieceLength);//DashLine(TargetWellPosition, WidthpieceLength);//DashLine(TargetWellincline, inclineLength);}/// <summary>/// 画虚线/// </summary>/// <param name="目标线段"></param>/// <param name="片元长度"></param>public void DashLine(Image targetpic,int pieceLength){int pieceNum;//片元数量List<GameObject>pieceList = new List<GameObject>();RectTransform targetRect;targetRect = targetpic.GetComponent<RectTransform>();float offsetLineX = (targetRect.sizeDelta.x) / 2;pieceNum = (int)((targetpic.GetComponent<RectTransform>().rect.width) / pieceLength);RectTransform firstRectTransform = null;for (int i = 0; i < pieceNum; i++){Image pieceImage = Instantiate(targetpic, transform);RectTransform pieceRectTransform = pieceImage.rectTransform;if (i == 0){pieceRectTransform.sizeDelta = new Vector2(pieceLength, 2);pieceRectTransform.anchoredPosition = new Vector2(targetRect.anchoredPosition.x - offsetLineX + (pieceLength / 2), targetRect.anchoredPosition.y);firstRectTransform = pieceRectTransform;}else{pieceRectTransform.sizeDelta = new Vector2(pieceLength, 2);pieceRectTransform.anchoredPosition = new Vector2(firstRectTransform.anchoredPosition.x + (pieceLength * i), firstRectTransform.anchoredPosition.y);}pieceList.Add(pieceImage.gameObject);}targetpic.GetComponent<Image>().enabled = false;for (int i = 0; i < pieceList.Count; i++){if ((i + 1) % 2 == 0){// 偶数pieceList[i].GetComponent<Image>().enabled = false;}}}
}