From 49af8b16ae3f9e6579656ed10f815e9c465557d0 Mon Sep 17 00:00:00 2001 From: Yann Herklotz Date: Tue, 13 Feb 2018 19:14:33 +0000 Subject: [entity] Starting work on entity system. --- yage/entity/system.h | 57 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 57 insertions(+) create mode 100644 yage/entity/system.h (limited to 'yage/entity/system.h') diff --git a/yage/entity/system.h b/yage/entity/system.h new file mode 100644 index 00000000..9100fa17 --- /dev/null +++ b/yage/entity/system.h @@ -0,0 +1,57 @@ +/** --------------------------------------------------------------------------- + * @file: system.h + * + * Copyright (c) 2017 Yann Herklotz Grave + * MIT License, see LICENSE file for more details. + * ---------------------------------------------------------------------------- + */ + +#ifndef YAGE_ENGINE_SYSTEM_H +#define YAGE_ENGINE_SYSTEM_H + +namespace yage +{ + +/** + * System interface for the different systems in the engine. + */ +class System +{ +public: + /** + * Virtual destructor to destroy all the objects that implement this + * properly. + */ + virtual ~System() = 0; + + /** + * Initializes the system. Good practice to have this function instead + * using the constructor. + */ + virtual void init() = 0; + + /** + * Updates the system at each interval using the time step. + * + * @param dt The time difference between the previous frame and the current one. + */ + virtual void update(double dt) = 0; + + /** + * Destroy the system and the components that are contained in it. + */ + virtual void destroy() = 0; +}; + +/** + * Implement the default destructor, but leaving it as purely virtual in the + * definition of the abstract class. This is so that the classes that implement + * the abstract class have to implement a desctructor, but at the same time, + * that there is no undefined behavious when the stack unwinds to the system and + * calls the system destructor. + */ +inline System::~System() {} + +} // namespace yage + +#endif -- cgit