the-dark-dungeon

a game with the application of raycasting.

The entire program is written without any external libraries, but the asset loading uses stb_image, because it's boring stuff and I don't feel like doing from scratch.

P.S.: because I don't want to initialize OpenGL through Win32 to get the v-sync, I cheated a little by using SDL. but that's just platform layer code; the actual renderer, physics engine, gameplay code is still written from scratch.

#videos

TTD early demo (11/26/2016): https://www.youtube.com/watch?v=rgWLmUx7Chw

TTD physics demo (11/28/2016): https://www.youtube.com/watch?v=ABcA5nmE6Eg&feature=youtu.be

TTD version 1.0 (1/5/2017): https://www.youtube.com/watch?v=lejmK2bgtDQ

#Features

things I implemented:

1. texture mapping for wall rendering.
2. floor & ceiling casting along with texture mapping.
3. supports multiple wall textures (8/31/2016)
4. sprite sorting & rendering (9/3/2016)
5. graphics-based bullet detection & basic entity system (9/3/2016)
6. perspective-oriented sprite generation (9/9/2016)
7. collision checking against walls (simulate both body collision and shoulder collision), gliding made possible (9/11/2016)
8. set up internal entity clock (9/20/2016)
9. basic AI (9/21/2016)
10. Faster platform layer with SDL (9/23/2016)
11. Asnychronous sound playback with task-based system (10/8/2016)
12. One variant memory block per entity, added enemies' firing state (10/28/2016)
13. Real collision detection, player hitpoints visual representation (11/10/2016)
14. Big code cleanup and replaced graphically-based collision detection with real collision detection (11/19/2016)
15. Bitmap font rendering (11/20/2016)
16. Basic ammo/reload system for pistol (11/23/2016)
17. Added rifle and minigun into the game (11/24/2016)
18. Extracted out a physics simulation layer to centralize all physics simulations (11/28/2016)
19. Added force to bullets and tuned a force constant for a nice bullet recoil (11/28/2016)
20. Added collectables (ammo, health pack, etc) (12/21/2016)
21. Procedural world generation (12/30/2016)
22. Added win state, death state, screen fader, and the world is resettable (1/4/2017)
23. Game is somewhat playable! (1/5/2017)

controls

Q: toggle debug HUD

W,A,S,D: move

1,2,3: toggle different wepaons

left_mouse/right_mouse: fire

ways you could optimize my code

reorganize memory layout for frame buffer

SIMD instructions

multi-threaded rendering

#screenshots

screenshot 1 (8/25/2016)

screenshot 2 (8/31/2016)

screenshot 3 (9/3/2016)

screenshot 4 (9/3/2016)

screenshot 5 (9/4/2016)

screenshot 6 (9/4/2016)

screenshot 7 (9/10/2016)

screenshot 8 (11/10/2016)

screenshot 9 (11/23/2016)

screenshot 10 (1/14/2016)