在Unity中使用fnt字体

参考：https://blog.csdn.net/langresser_king/article/details/49964021 部分字体使用博主的脚本生成后会无法对齐，修改了其中的部分代码

美术生成艺术字体后，一般会有一个fnt文件以及一个png文件，导入到Unity中，需要转换为CustomFont才能使用。

在Editor文件夹下创建以下脚本

using System.Collections.Generic;
using System.IO;
using System.Text.RegularExpressions;
using UnityEditor;
using UnityEngine;

public class CreateBMFont : MonoBehaviour
{
    [MenuItem("Tool/CreateBMFont")]
    static void CreateFont()
    {
        Object obj = Selection.activeObject;
        string fntPath = AssetDatabase.GetAssetPath(obj);
        string fontName = Path.GetFileNameWithoutExtension(fntPath);
        if (fntPath.IndexOf(".fnt") == -1)
        {
            // 不是字体文件 
            Debug.LogError("The Selected Object Is Not A .fnt file!");
            return;
        }

        string customFontPath = fntPath.Replace(".fnt", ".fontsettings");
        Font customFont;
        if (!File.Exists(customFontPath))
        {
            customFont = new Font();
            AssetDatabase.CreateAsset(customFont, customFontPath);
        }
        else
        {
            customFont = AssetDatabase.LoadAssetAtPath<Font>(customFontPath);
        }

        string pngPath = fntPath.Replace(".fnt", ".png");
        if (!File.Exists(pngPath))
        {
            Debug.LogError("未找到同名图片");
            return;
        }
        Texture texture = AssetDatabase.LoadAssetAtPath<Texture>(pngPath);

        string matPath = fntPath.Replace(".fnt", ".mat");
        Material mat;
        if (!File.Exists(matPath))
        {
            mat = new Material(Shader.Find("GUI/Text Shader"));
            mat.mainTexture = texture;
            mat.name = fontName;
            AssetDatabase.CreateAsset(mat, matPath);
        }
        else
        {
            mat = AssetDatabase.LoadAssetAtPath<Material>(matPath);
            mat.mainTexture = texture;
        }

        customFont.material = mat;

        StreamReader reader = new StreamReader(new FileStream(fntPath, FileMode.Open));

        List<CharacterInfo> charList = new List<CharacterInfo>();

        Regex reg = new Regex(@"char id=(?<id>\d+)\s+x=(?<x>\d+)\s+y=(?<y>\d+)\s+width=(?<width>\d+)\s+height=(?<height>\d+)\s+xoffset=(?<xoffset>(-|\d)+)\s+yoffset=(?<yoffset>(-|\d)+)\s+xadvance=(?<xadvance>\d+)\s+");
        string line = reader.ReadLine();
        int lineHeight = 65;
        int texWidth = 512;
        int texHeight = 512;

        while (line != null)
        {
            if (line.IndexOf("char id=") != -1)
            {
                System.Text.RegularExpressions.Match match = reg.Match(line);
                if (match != System.Text.RegularExpressions.Match.Empty)
                {
                    var id = System.Convert.ToInt32(match.Groups["id"].Value);
                    var x = System.Convert.ToInt32(match.Groups["x"].Value);
                    var y = System.Convert.ToInt32(match.Groups["y"].Value);
                    var width = System.Convert.ToInt32(match.Groups["width"].Value);
                    var height = System.Convert.ToInt32(match.Groups["height"].Value);
                    var xoffset = System.Convert.ToInt32(match.Groups["xoffset"].Value);
                    var yoffset = System.Convert.ToInt32(match.Groups["yoffset"].Value);
                    var xadvance = System.Convert.ToInt32(match.Groups["xadvance"].Value);
                    Debug.Log("ID" + id);


                    CharacterInfo info = new CharacterInfo();
                    info.index = id;
                    float uvx = 1f * x / texWidth;
                    float uvy = 1 - (1f * y / texHeight);
                    float uvw = 1f * width / texWidth;
                    float uvh = -1f * height / texHeight;

                    info.uvBottomLeft = new Vector2(uvx, uvy);
                    info.uvBottomRight = new Vector2(uvx + uvw, uvy);
                    info.uvTopLeft = new Vector2(uvx, uvy + uvh);
                    info.uvTopRight = new Vector2(uvx + uvw, uvy + uvh);

                    info.minX = -xoffset;
                    info.minY = lineHeight / 2 - yoffset; // 纵向的偏移取统一的高度
                    info.glyphWidth = width;
                    info.glyphHeight = -height;
                    info.advance = xadvance;

                    charList.Add(info);
                }
            }
            else if (line.IndexOf("scaleW=") != -1)
            {
                Regex reg2 = new Regex(@"common lineHeight=(?<lineHeight>\d+)\s+.*scaleW=(?<scaleW>\d+)\s+scaleH=(?<scaleH>\d+)");
                System.Text.RegularExpressions.Match match = reg2.Match(line);
                if (match != System.Text.RegularExpressions.Match.Empty)
                {
                    lineHeight = System.Convert.ToInt32(match.Groups["lineHeight"].Value);
                    texWidth = System.Convert.ToInt32(match.Groups["scaleW"].Value);
                    texHeight = System.Convert.ToInt32(match.Groups["scaleH"].Value);
                }
            }
            line = reader.ReadLine();
        }

        customFont.characterInfo = charList.ToArray();
        EditorUtility.SetDirty(customFont);
        AssetDatabase.SaveAssets();
        AssetDatabase.Refresh();
        Debug.Log(customFont);
    }
}

选中fnt字体，再点击菜单栏上的 "Tool/CreateBMFont" 即可生成对应的CustomFont。