Walls, Floors, & Ceilings

pannenkoek2012 explains the technical details of how Super Mario 64 handles wall, floor, and ceiling collisions.

I explain all about walls, floors, and ceilings, as well as other related topics like triangles/unit normal vectors, frames/quarter steps, Mario’s position, the sequence of a events in a frame, and out of bounds. For convenience, here are each of the topics: 00:00 Intro, Triangles, Unit Normal Vectors 02:29 Frames, Quarter Steps 03:34 Mario’s Position 04:35 Sequence of Events in a Frame 04:59 Wall Hitboxes 10:21 Multiple Wall Hitboxes 13:55 Double-Sided Walls 16:58 Clipping Through Walls 18:51 Floor Hitboxes 20:22 Ramps and Stairs 21:20 Ceiling Hitboxes 24:56 Entering Ceiling Hitboxes 26:41 Sequence of Events in a Frame Revisited 27:02 Boxes 28:13 Seemingly Vertical Surfaces 30:28 Out of Bounds 32:44 Entering Out of Bounds 34:17 Walls vs. Ceilings vs. Out of Bounds youtu.be/a9fUV7uA2_s Non-Cardinal Wall Hitboxes I consider the information in this video to be extremely important, especially when it comes to SM64 analysis (e.g. can Mario dive recover onto this box?). In fact, I've been using this information for years to help me execute strats (e.g. clipping through two walls at a corner when I have less than 400 speed) and quickly dismiss impossible strats (e.g. even if we had enough speed, we couldn't launch to above the chests in JRB since that's above a ceiling). And so now, I've finally compiled all of this knowledge into one video so that everyone has access to it. Big thanks to Tyler Kehne and Peter Fedak for assisting me throughout the research process. Note that I've tried to make this video as simple and concise as possible, which often meant making generalizations that apply in most cases but not all. For example, I said moving into out of bounds while airborne resets Mario's horizontal speed, but this only occurs when Mario has a small positive speed or negative speed. For a medium positive speed, Mario will do a soft bonk. And for a high positive speed, Mario will do a hard bonk. So there may be exceptions to some things I say, but this was because delving into every possible case would have made the video several times longer and more complicated. Interestingly, in the time between when I started this video and when I posted it, I've made other videos that have used information from this video, such as the hitbox dimensions and effects. Those videos even used the same color scheme in their visuals, since I had just copied the visuals from this video. But in all of those cases, I had to briefly explain the important principles beforehand, since I couldn't rely on viewers having seen the not-yet-released wall/floor/ceiling video. But now that this video is released, I won't bother re-explaining information from this video in future videos that rely on it. Aside: I had actually started this video on May 26, 2016 (a year and one day ago). But after starting it, this video ended up becoming a much larger endeavor than I had anticipated. Indeed, the magnitude of its scope combined with how tedious the research and visuals were