using UnityEngine;using System.Collections;using UnityEngine.UI;using System.Collections.Generic;internal class Line{    //每行开始顶点索引    private int startVertexIndex;    public int StartVertexIndex    {        get        {            return startVertexIndex;        }    }    //每行结束顶点索引    private int endVertexIndex;    public int EndVertexIndex    {        get        {            return endVertexIndex;        }    }    //每行顶点总量    private int countVertexIndex;    public int CountVertexIndex    {        get        {            return countVertexIndex;        }    }    public Line(int startVertexIndex, int countVertexIndex)    {        this.startVertexIndex = startVertexIndex;        this.countVertexIndex = countVertexIndex;        this.endVertexIndex = this.startVertexIndex + countVertexIndex - 1;    }}/// 
/// 这是设置字体移动的核心类/// 执行多重行移动的核心算法是：将多重行分开依次进行处理，每一行的处理都是前面对单行处理的子操作/// 但是由vh是记录一个文本中所有的字的顶点，所以说需要分清楚每行开始，每行结束，以及行的字个数，/// 如此需要创建一个行的数据结构，以保存这些信息/// 
[AddComponentMenu("UI/Effects/TextSpacing")]public class TextSpacing : BaseMeshEffect{    public float spacing = 0;    public override void ModifyMesh(VertexHelper vh)    {        Text text = GetComponent
     
      ();        string[] ls = text.text.Split('\n');        int length = ls.Length;        bool isNewLine = false;        Line[] line;        if (string.IsNullOrEmpty(ls[ls.Length - 1]) == true)        {            line = new Line[length - 1];            isNewLine = true;        }        else        {            line = new Line[length];        }        //Debug.Log("ls长度" + ls.Length);        for (int i = 0; i < line.Length; i++)        {            if (i == 0 && line.Length == 1 && isNewLine == false)//解决单行时没有换行符的情况            {                line[i] = new Line(0, ls[i].Length * 6);                break;            }            if (i == 0 && line.Length >= 1)//解决单行时有换行符的情况，以及多行时i为0的情况            {                line[i] = new Line(0, (ls[i].Length + 1) * 6);            }            else            {                if (i < line.Length - 1)                {                    line[i] = new Line(line[i - 1].EndVertexIndex + 1, (ls[i].Length + 1) * 6);                }                else                {                    if (isNewLine == true)//解决多行时，最后一行末尾有换行符的情况                    {                        line[i] = new Line(line[i - 1].EndVertexIndex + 1, (ls[i].Length + 1) * 6);                    }                    else                    {                        line[i] = new Line(line[i - 1].EndVertexIndex + 1, ls[i].Length * 6);                    }                }            }        }        List
      
        vertexs = new List
       
        ();        vh.GetUIVertexStream(vertexs);        int countVertexIndex = vertexs.Count;        //Debug.Log("顶点总量" + vertexs.Count);        for (int i = 0; i < line.Length; i++)        {            if (line[i].CountVertexIndex == 6) { continue; }            for (int k = line[i].StartVertexIndex + 6; k <= line[i].EndVertexIndex; k++)            {                UIVertex vertex = vertexs[k];                vertex.position += new Vector3(spacing * ((k - line[i].StartVertexIndex) / 6), 0, 0);                //Debug.Log("执行");                vertexs[k] = vertex;                if (k % 6 <= 2)                {                    vh.SetUIVertex(vertex, (k / 6) * 4 + k % 6);                }                if (k % 6 == 4)                {                    vh.SetUIVertex(vertex, (k / 6) * 4 + k % 6 - 1);                }            }        }    }}