Hi Brian, I read this as Ben Eater's reply to a comment on the interactive version.
Since there wasn't really anything like this yet, we built it all ourselves from a variety of existing web tools: WebGL (using threejs plus some custom shaders) for 3d stuff, raw canvas for the 2d stuff, howlerjs for handling the audio playback, and lots of React for the UI and to glue it all together. It's very much a bespoke app. In the future, I hope we'll build more of these and as we do so, the tech will evolve to something more easily generalized. My guess is that one of the components in producing the interaction may be beyond your technology. Most of the best information is in the videos, but the interaction does take it to the next level. I agree with you that these videos are excellent. I often/usually have to watch them several times because they are so challenging in terms of the concepts that are presented visually so clearly. Cheers, bob > On Nov 1, 2018, at 11:46 AM, Brian Schott <[email protected]> wrote: > > With pleasure I watched the two videos you linked. The professionalism of > the presentation is unprecedented in my experience. > > I was unable to view the additional interactive video which was touted so > highly there. Apparently my computer is ill-equipped for that technology. > > On the other hand, in addition I found the following video by the same > author to be more basic and helped my a lot until the very end where the > author tried to explain the geometric connection between x->e^x . That blew > me away. But what was very helpful was seeing how complex numbers can be > seen as combining a translation in the real dimension and a rotation in the > imaginary dimension. > > https://www.youtube.com/watch?v=mvmuCPvRoWQ > > Well, to be honest, I got very lost in the longer one, and was hoping that > others would reply to your chat and give me some perspective on just how > valuable and reachable these videos are. > > But no one seems to have directly commented on these videos and the > comments in Raul's thread seem to choose other interpretations (such as > time and 3 distances, I think), I am not any clearer on the usefulness of > quarternions, especially for rotating 3d spaces, which I have enjoyed > exploring myself using J and 4x4 shaped matrices. But even that exploration > has been hampered for a few years now because I have not been able to use > opengl or other graphics systems with . > > So this has been a rather frustrating period of time relative to graphics > endeavors anyhow. > > > On Sat, Oct 27, 2018 at 3:00 AM 'robert therriault' via Chat < > [email protected]> wrote: > >> There is a channel on youtube called 3blue1brown where Grant Sanderson >> does exceptional math videos. I have heard interest in quaternions >> expressed in the J community so I will put in some links that provide >> visual explanations of quaternions and how to visualize their actions >> across 4 dimensions. >> >> Initial video introducing quaternions: >> https://www.youtube.com/watch?v=d4EgbgTm0Bg >> >> Short video introducing an interactive tool to investigate quaternion >> behaviour: https://www.youtube.com/watch?v=zjMuIxRvygQ >> >> Site containing the interactive videos https://eater.net/quaternions >> (yes these videos are interactive and can be manipulated in real time!) >> >> Enjoy >> >> Cheers, bob >> ---------------------------------------------------------------------- >> For information about J forums see http://www.jsoftware.com/forums.htm > > > > -- > (B=) <-----my sig > Brian Schott > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
