Wow, this brings back memories... I took a 3D computer graphics course in university in the early 2000s, and the final project was to make a game. IIRC we coul

Wow, this brings back memories... I took a 3D computer graphics course in university in the early 2000s, and the final project was to make a game. IIRC we could use as many open source libraries + assets as we wanted, but we had to write the renderer. Our professor was a big Buffy the Vampire Slayer fan, so we made a Buffy game. My team thought we'd have some easy points for that. When we presented our plan, he says "I know you know I'm a Buffy fan, so this better be good"... Ooops. Time to get to work. We used the Quake map format, which is BSP, and our renderer worked pretty well. We used Quake 2 character models, which worked pretty well on its own. I think it was because someone had made some vampire models for it. When we integrated the two, the performance was terrible. Like a slideshow. After a brief panic, we realized that the Z axis was inverted between the two modules we'd written, and the guy that put them together was inverting the model every frame. After inverting it once when the model was loaded, they worked pretty well together. We added a simple hitbox (a rectangular prism at the maximum points of the model), and had a fun little game after that!