karanseq / simple-game-engine

A simple game engine written in C++.

A simple game engine written entirely in C++ as part of the Game Engineering course at EAE, University of Utah.

This project is a work in progress and currently contains the following modules:

Thread-safe Memory Management System:

• Provides a variable size allocator with byte alignment & defragmentation
• Provides a fixed size allocator for quick allocations with low overhead
• Provides overwrite detection by guardbanding memory for debug builds
• Provides a smart pointer suite, complete with implementation for shared, weak & unique pointers
• Provides usage statistics with respect to count and size of incoming allocations

Multi-threaded Job System:

• Provides multiple job queues, each with multiple workers
• Each worker contains an std::thread and waits for jobs to be posted in the corresponding queue
• Any kind and amount of jobs can be added to the job system, as long as a given job implements InterfaceJob.

Timer and Time-based Events:

• An updater that manages broadcasting the tick to all entities that need it
• The updater also maintains a list of timer events and broadcasts them
• A timer event contains a function object. It invokes this function object after a specified duration either once, multiple times or till it is destroyed

2D Collision System:

• Provides 2D collision detection using a swept separating axis collision test
• Provides classification of physics objects using enum types and collision filtering using bit masks
• Provides default collision response using reflection
• Provides callbacks on collision detection

Miscellaneous:

• A logging and asserting utility
• A pooled and hashed strings utility
• A primer for a game object with corresponding geometry & very simple physics
• A set of optimized geometry classes using Intel SSE instructions
• A lua-parser for data driven development
• A thread-safe file caching utility

This project also contains a simple space invaders clone as a test harness for the engine in addition to module specific unit tests.

This project needs at least Visual Studio 2015 to compile and run.

Gameplay & Instructions:

• You control a white ship that automatically shoots bullets.
• The objective of the game is to kill all the colored enemies on the screen.
• The game contains five levels, each increasing in difficulty.
• You have infinite ships but if your ship takes damage from a single enemy bullet, your level will restart.
• Completing the fifth level starts you back at the first level instead of quitting.
• Use the left and right arrow keys to move your ship.
• Hitting 'P' pauses the game.
• Hitting 'R' and 'Q' while the game is paused causes the level to restart and the game to quit respectively.