Відео

I guess Detective was possessed by a demon and did all those crimes.

quatBRelativeToA = quatB * inverse(quatA)

e g let's say you spun your cube to configuration A: +z then +x then +x the inverse of this (to get back to a solved rubiks cube) is -x then -x then -z let's say your new configuration B is +z +x + x +y. I think you will agree that relative to A you would expect B to be simply +y so let's see, inverse (A) = -x -x -z, B is +z +x +x +y, so B * inverse(A) does all of the righthand instructions then all of the left so -x -x -z +z +x +x +y as you can see from the middle, the -z and +z cancel, then the two pairs of x's cancel, leaving just +y. so we can see in this example the formula works

@@AlexRoseGames this single comment just helped me understand quaternions to a higher degree

haha, teşekkürler

I'm 32, this is how I speak in lectures

I make videos when I have a good reason to share. it takes time to make videos and it's just a hobby for me. is there something you wanted to see?

thankyou

in this case I was using the word direction a bit colloquially for non layman, as in like "the pub is 5 miles north east of here". more technically I meant a displacement (aka a unit vector direction and its magnitude) not just a normalised direction. the point anyway was to distinguish that a vector does not have a preferred origin, it describes a transform that takes you from any arbitrary point to another calculable point based on that transformation applied in a specific frame

it's not something that's easily human parseable. if pitch is a, yaw is b and roll is c, quaternion x y z and w are: x = sin(c/2) * cos(a/2) * cos(b/2) - cos(c/2) * sin(a/2) * sin(b/2) y = cos(c/2) * sin(a/2) * cos(b/2) + sin(c/2) * cos(a/2) * sin(b/2) z = cos(c/2) * cos(a/2) * sin(b/2) - sin(c/2) * sin(a/2) * cos(b/2) w = cos(c/2) * cos(a/2) * cos(b/2) + sin(c/2) * sin(a/2) * sin(b/2)

yeah, the example was there to demonstrate how you can operate on inverses with a simple example, but in reality I would do the same as you. though there are more complicated scenarios where I would use the method I described

haha, hope you have fun!

Good luck Peppin! you're gonna need it haha

@@AlexRoseGames I'm just glad you didn't make it so like you'll get a trophy for completing that Rainbow challenge and would be required for the platinum or else it would be harder than Necrodancer's platinum which is the hardest platinum to exist

@@Peppinohio one person has actually done rainbow challenge lol

@@AlexRoseGames I know, its hella impressive and may be the most impressive achievement in platforming history

Yo I got the game!

for any chance of that happening go tell your favourite streamer about srbr 1. right now I am porting games for people and in 2 months I make as much money as I made doing rude bear and that took me 3 years. if it suddenly took off and actually made money of course I would do a sequel but all it did was make me not want to make games anymore

@@AlexRoseGames oh, lemme tell ya that there is a Indie games discount section in the playstation store, maybe people could find the game more frequently or maybe if you are hella lucky, srbr could become a monthly ps plus game, if that happens, the amount of popularity it would get would skyrocket, farewell, good luck my man.

thankyou, i like your comment

the video is called how to *think about* quaternions, the description states it's to use in your game engine. in the first 25 seconds I said I wouldn't be talking about the mathematical aspect of quaternions. this video is aimed at people who need to use quaternions in their development. if you want a mathematical description of quaternions I recommend 3blue1brown's video, it should be the top hit on youtube when you search up quaternions

@@AlexRoseGames you made a mistake, just change the video description, and put mathematical rotations applied to games, if you put quaternions there, you have to talk about what makes quaternions, quaternions, you introduced the video on gimbal lock and the need for quaternions and you followed on rotations being not commutative the order is important(that algebra 101), and you stretched that point the whole video, your title is a clickbait, people are so dumb look at the comment below this one, one guy thought you explained quaternions better than 3blue1brown.

@@KaoukabiJaouad you are just not the target audience for this video. 3blue1brown's video is great, the video you want to watch already exists. you are irrationally mad that people here found this video useful, they're exactly whom I made it for. developers applying quaternions to game development or robotics don't need to know about complex spaces, they need an intuitive way to think about applying them. if you didn't listen to the intro or read the description, that's a you problem not a me problem

@@AlexRoseGamesim so sorry that you have to deal with people like this

haha, you get used to it, you just have to keep your vision reasonably scoped

Me, too 😁

​@@talisynstoyme too

No problem. Enjoy!

one is mathematician's explanation, the other is programmer's explanation.

​@@minhajsixbyte Ya, 3B1B's explanation is the programmer's explanation, and this is the mathematician's explanation.

Rubik’s*

​@@angeldude101Isn't it the other way around?

@@pronounjow Nope. A programmer would care mostly about how to implement something and use it. From the perspective of lists of numbers, quaternions are 4D and have crazy multiplication table that you just need to write down in your code and then forget about it. A mathematician should actually care about the meaning behind the symbols and the relationships between them. Basically, as a programmer, quaternions are a compact but arcane data structure that happens to be good at rotating vectors. As a mathematician, quaternions _are_ rotations, and the multiplication table is just a reflection of the physical rotations that quaternions translate into algebra.

just google rubiks online, I went on the first link

Thanks for adding your valuable insight. Do you have a page or blog I can follow you on. Cheers, b

yeah, at 54:58 I realised the mistake. I didn't want to spend too long reading code because the interviewer was not a programmer/gamedev and we were on a time constraint. I was just glancing at the code blocks and filling in the blanks in my head rather than reading it properly either way, it wasn't a big deal since it was just a colour change and I ended up switching it from a SpriteRenderer to a Renderer once we transitioned into 3d. imo the bigger mistake is that I just lazily expected it to be running right and not forward and started building the project in 2d instead of 3d

@@AlexRoseGames I think this could be pretty useable(right now) if they just increased the character limit and the number of tokens it can take 😁

@@StriderAngel496 definitely as time went on it was showing its weaknesses in that.. we were waiting long periods of time to get answers back

yes