Make Guns

A 2D top-down action game built with C++ and SDL3, created by following a game development tutorial. Features a player that can move, jump, and shoot at enemies in a tile-based environment with parallax scrolling backgrounds.

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Features

• Player movement: Walk, run, jump, and slide with smooth physics
• Shooting: Fire bullets with momentum transfer and random spread
• Enemy AI: Enemies patrol and chase the player when in range, take damage, and die with animations
• Collision detection: AABB collision for player, enemies, bullets, and level tiles
• Parallax scrolling: Multi-layer background scrolling at different speeds
• Sprite animations: Frame-based animations for player states, enemies, and bullets
• Audio: Sound effects for shooting, bullet impacts, and looping background music
• Fullscreen toggle: F11 to switch between windowed and fullscreen
• Debug mode: F key shows collision boxes and game state

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Controls

Key	Action
A / D	Move left / right
K	Jump
J	Shoot
F	Toggle debug mode
F11	Toggle fullscreen

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Building

Requirements

• CMake 3.8+
• C++20 compiler (Visual Studio 2019+ recommended)
• SDL3
• SDL3_image
• SDL3_mixer
• GLM

Steps

cmake --preset default
cmake --build build

The executable will be output as makeguns.

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Project Structure

makeguns/
├── data/                   # Game assets
│   ├── audio/              # Sound effects (.wav) and music (.mp3)
│   ├── bg/                 # Parallax background layers
│   ├── tiles/              # Tile sprites (brick, grass, ground, panel)
│   ├── *.png               # Player, enemy, and bullet sprites
├── makeguns/               # Source code
│   ├── makeguns.cpp        # Main game loop and logic
│   ├── makeguns.h          # Main header
│   ├── gameobject.h        # Entity structures and types
│   ├── animation.h/cpp     # Frame-based animation system
│   ├── timer.h/cpp         # Timer utility
│   └── CMakeLists.txt      # Build config
├── CMakeLists.txt          # Root build config
└── CMakePresets.json       # CMake preset definitions

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Technical Details

• Resolution: 640x320 logical pixels, scaled up with letterboxing
• Physics: Gravity at 500 units/sec², velocity-based movement with acceleration/deceleration
• Bullet pooling: Up to 8 pooled bullet objects reused to avoid allocations
• Rendering layers: Background → background tiles → player/enemies → bullets → foreground tiles
• Audio: SDL3_mixer with 8 polyphonic sound channels + 1 music track
• Camera: Follows player horizontally, centered on the viewport

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Credits

Background music: Juhani Junkala - Retro Game Music Pack, Level 1