标签:
最近有个需求是想让程序解析策划编辑一个文本生成一段CG,内容使用大致是这样
cgSetCameraEx(118.6324,30.71189,75.55666,45,-45,0,0) cgCloneMyPlayer(1) cgSetPosDir(1,109,80,0) cgSetCameraEx(114.18,23.17,96.9,11.51974,-61.49661,-3.384705,3.5) cgCreateActor(2,25,108,100,90) cgWait(0.2) cgMove(1,109.7,100,9,false) cgWait(3) cgFaceToActor(1,2) cgWait(1.5) cgPopTalk(1,1,2)
我的做法是借助一个第三方库NCalc,把自定义的函数注册到解析器里,让解析器去Load这段文本
using UnityEngine; using System.Collections; using NCalc; using System.Collections.Generic; using System; //解析字符串表达式执行函数 public class CallFunctionScript { //缓存函数表 private readonly Dictionary<string, Func<Expression[], object>> mRegisterFunctions = new Dictionary<string, Func<Expression[], object>>(); //注册可被执行的函数 //注册的函数格式满足 public static object Func(Expression[] args) //函数返回值不能是null,如果不需要返回值可以返回1 public void RegisterFunction(string funcName, Func<Expression[], object> func) { if (!mRegisterFunctions.ContainsKey(funcName)) { mRegisterFunctions.Add(funcName, func); } else { UnityEngine.Debug.LogError("duplicate func " + funcName); } } //反注册所有函数 public void UnRgisterAllFunction() { mRegisterFunctions.Clear(); } //执行函数 public object Execute(string expression) { var exp = new Expression(expression); //函数代理 exp.EvaluateFunction += delegate(string name, FunctionArgs args) { Func<Expression[], object> func; if (mRegisterFunctions.TryGetValue(name, out func)) { object result = null; try { result = func(args.Parameters); } catch (Exception ex) { UnityEngine.Debug.LogError("Execute "+name + "() Error:" + ex.ToString()); } finally { args.Result = result; } } else { UnityEngine.Debug.LogError("Can‘t find function [" + name+"]"); } }; try { return exp.Evaluate();//执行函数 } catch (Exception ex) { Debug.LogError("Evaluate \"" + expression + "\" Error: "+ex.ToString()); return null; } } }
//被注册的函数如这样
public static class CGFunctionWrapper { public static object cgCloneMyPlayer(Expression[] args) { if (args.Length < 1) { Logger.Error("cgCloneMyPlayer() args<[1]"); return 0; } PlayCG.Instance.cgCloneMyPlayer( Convert.ToInt32(args[0].Evaluate()) ); return 1; } }
使用方法
public CallFunctionScript mExecutor = new CallFunctionScript(); mExecutor.RegisterFunction("cgCloneMyPlayer", CGFunctionWrapper.cgCloneMyPlayer); mExecutor.Execute("cgCloneMyPlayer(1)");
标签:
原文地址:http://www.cnblogs.com/mrblue/p/5231930.html