photon游戏引擎代码例子

      上周下载了phonton游戏引擎， 接下来看看了 本来想run下,只是可惜少一个头文件，也懒的去找就顺势看了看其中的有些代码感觉在编程中可以使用得到，特意写下，当然按照本人风格,做了一些变动 :)

//this file come from photon game engine //but modified it. #ifndef G_EXCEPTIONS_HPP #define G_EXCEPTIONS_HPP #ifndef _G_LIB_ #error please define g lib #endif #include <string> #include <sstream> #include <ostream> namespace g { //title: exception/error types //class: thorwable //class- thowable is the base exception class for g library.. //thowable is pure virtual and can not be used directly. //exception and error are available for non-specific exceptions. //all exceptions have the same interface as Throwable. //parameters: //description: the exception's description //file: the file that contains exception //line: the line of exception.... class Throwable { public: Throwable(const std::string& description = std::string(), const std::string& file = std::string(), int line=0) throw(); virtual ~Throwable() throw()=0; std::string virtual what() const throw(); std::string virtual getDesc() const throw(); friend std::ostream& operator<<(std::ostream& os, const Throwable& rhs); private: std::string description_; std::string file_; int line_; }; // Class: Exception // Exception is the base exception class, all exceptions inherit from // it, and it inherits from <Throwable>. // Exception should be used for hard to classify exceptions. class Exception : public Throwable { public: Exception(const std::string& description = std::string(), const std::string& file = std::string(), int line=0) throw(); std::string what() const throw(); }; // Class: ArgumentException // ArgumentException should be thrown when an argument is passed to a function // that is invalid. class ArgumentException : public Exception { public: ArgumentException(const std::string& description = std::string(), const std::string& file = std::string(), int line=0) throw(); std::string what() const throw(); }; // Class: PreconditionException class PreconditionException : public Exception { public: PreconditionException(const std::string& description = std::string(), const std::string& file = std::string(), int line=0) throw(); std::string what() const throw(); }; // Class: RangeException // RangeException should be thrown if something (such as an array bound) is out // of bounds. class RangeException : public Exception { public: RangeException(const std::string& description = std::string(), const std::string& file = std::string(), int line=0) throw(); std::string what() const throw(); }; // Class: ResourceException // ResourceException should be thrown if there is a problem accessing a // resource. class ResourceException : public Exception { public: ResourceException(const std::string& description = std::string(), const std::string& file = std::string(), int line=0) throw(); std::string what() const throw(); }; // Class: Error // Error is the base error class, all errors inherit from it, and it inherits // from <Throwable>. // Error should be used for hard to classify errors. // // Errors should be used when a problem occurs which is difficult to just // ignore, usually more severe than exceptions. class Error : public Throwable { public: Error(const std::string&description = std::string(), const std::string& file = std::string(), int line=0) throw(); std::string what() const throw(); }; // Class: MemoryError // MemoryError should be thrown if an error occurs while allocating memory. class MemoryError : public Error { public: MemoryError(const std::string& description = std::string(), const std::string& file = std::string(), int line=0) throw(); std::string what() const throw(); }; // Class: APIError // APIError should be thrown if an error occurs in code which is not part of // g lib. class APIError : public Error { public: APIError(const std::string& description = std::string(), const std::string& file = std::string(), int line=0) throw(); std::string what() const throw(); }; } #endif //END G_EXCEPTIONS_HP

//This file is part of g lib #ifndef G_VERSIONINFO_HPP #define G_VERSIONINFO_HPP #ifndef _G_LIB_ #error please define g lib #endif #include <string> #include <ostream> namespace g { namespace software { // Class: VersionInfo // Class which stores version information, such as release numbers. // Format is majorRelease.Minor.Release [ExtraInfo]. class VersionInfo { public: VersionInfo(); VersionInfo(unsigned int maj, unsigned int min, unsigned int pat, const std::string& ext=""); ~VersionInfo(); bool operator< (const VersionInfo &rhs) const; bool operator<=(const VersionInfo &rhs) const; bool operator==(const VersionInfo &rhs) const; bool operator>=(const VersionInfo &rhs) const; bool operator> (const VersionInfo &rhs) const; friend std::ostream& operator<<(std::ostream &o, const VersionInfo &rhs); public: unsigned int majorRelease; unsigned int minorRelease; unsigned int patch; std::string extra; }; // Function: ensureVersion // Checks a version of a library against the required version, throws // an APIError if the version is not met. // // Parameters: // library - Name of library being initialized. // version - Version of library being used. // required - Required version of library. void EnsureVersion(const std::string& library, const software::VersionInfo& version, const software::VersionInfo& required); } } #endif //G_VERSIONINFO_HPP 

 

至于实现就不写了

 

然后再来一段关于处理versionInfo的代码如上所示。

 

phonton引擎较小,便于让初学者熟悉游戏引擎的基本框架