Inspired by Wolfenstein 3D, this project is my first implementation of raycasting, a method to represent a coordinate array as a 3D map!
The idea behind raycasting is to trace rays from the eye, one per pixel, and find the closest object blocking the path of that ray (walls).
To do so, I chose to use a 60 degrees field of view which allows to have an immersive gameplay. In comparison, Wolfenstein uses a 72 degrees FOV.
From the player's eyes, I trace rays from left to right, on the whole width of the window.
In order not to miss any wall in front of the player, I use the Digital Differential Analysis algorithm (DDA) which allows me to move diagonally in the 2D map by traversing all the walls on the path.
Thanks to this, I know where the walls in front of the player are, and their distance from the current position.
Now, all I have to do is to display the textures on the screen.
Each of my textures is 64x64 pixels. If the size of the wall on the screen is bigger, I multiply by a coefficient each pixel of the image, and I divide it in the opposite case.
You can compile the code using make for mandatory part and make bonus for bonus part. Here's a list of all Makefile commands to display maps:
make clustersmake bocalmake junglemake amongusmake librarymake minemake village
Bonus part is an upgraded version of mandatory part and contains the following features:
- Minimap to show your current position on the map. You can press
Mkey to make it appear/disappear. - Mouse rotation. You can click on the screen to make the cursor appear/disappear.
- Wall collision, a must-have on any games!
