Ray-caster

A Wolfenstein 3D-style raycasting engine built from scratch in C++17 using SDL2.

About

This engine renders a pseudo-3D first person view from a 2D grid map. It casts one ray per screen column using DDA-style grid traversal to find wall intersections, then draws textured wall slices scaled by distance. Floors and ceilings are rendered via inverse screen-to-world mapping, and sprites are projected into screen space with depth sorting and occlusion against walls. The common Fish-eye distortion issue is corrected using perpendicular distance projection.

Features

• Textured walls, floors, and ceilings
• Sprite rendering with transparency and depth testing
• 800x600 projection plane upscaled to 1280x768

This project implemented the 'core' of a raycasting engine.

Additional features could be:

• Doors and interactive elements
• Dynamic lighting and shading by distance
• Weapon rendering and combat

Controls

Key	Action
W / S	Move forward / backward
A / D	Rotate left / right

Building

Requires SDL2 and SDL2_image.

make
./main