Preface#
The content of this column is from the online course "Fundamentals of 3D Game Engine Architecture and Design" on XuetangX. I have converted it into a text and image version (I personally prefer text tutorials as they are much faster to read), for easy reference.
Original course link: Fundamentals of 3D Game Engine Architecture and Design.
Resource Management#
Overview of Resource Management#
Organizing and managing game resources. The goal is to effectively organize and manage various types of game resources, providing them to the game program quickly and accurately at the appropriate time. Resource organization refers to designing the memory structure of resource data based on the characteristics and usage of various resources. Resource management refers to abstracting and defining a unified resource processing method, such as resource loading and unloading, resource scheduling, etc.
The process diagram of resource management is as follows:
Game resource management includes:
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File management: including file loading and unloading, file parsing, file format conversion, file resource packaging, file resource transmission, etc.
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Memory management: including memory allocation, access guarantee, memory release, etc.
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State management: generally, a game resource is not stored repeatedly in memory to save memory. Based on the resource state, decisions are made for loading, usage, etc. Resource states include: undefined, defined, unloaded, loaded, in use, etc. Example of a resource state transition diagram:
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Scheduling algorithm: the principle is to move resource data as little as possible. When movement is necessary, the movement strategy is determined based on certain conditions. Common scheduling algorithms include: arranging resources by priority, LRU algorithm, determining the most likely used resource based on current operations, etc.
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Multithreading processing
Resource Management Examples#
OGRE Resource Management#
The class diagram of the main classes is as follows:
The relationship diagram of the above three core classes is as follows:
The timing diagram of the OGRE resource lifecycle is as follows:
Panda3D Resource Management#
Main class modules for Panda3D resource management:
Panda3D asynchronous resource loader class diagram:
Panda3D asynchronous loading timing diagram:
