On overwhelming popular vote we take a break from nodelling and, before moving to work on the leg proper, we spend some time explaining how IK actually works, and how you can bake your own.
I don’t know if I would call it a math heavy video, probably not, but I do like the picture it draws of practical application, and how some things (IK in this case) are often much simpler to reproduce than they are assumed to be.
Enjoy,
In the interest of building up vocabulary on math fundamentals for the rest of the season we introduce Set and Graph Theory.
Both the video description and a comment under it contain an Errata Corrige I have to make here as well:
While talking about the inverse function of sin, arcsin, I mention the co-domain of the function being -pi to +pi; that is incorrect, as the domain of arcsin spans the half circle, and therefore is -1/2pi to +1/2pi
I backpedaled on my decision of showing implementation first and explain later.
We to start from a healthy dose of very practical theory with Trigonometry, and introduce the actual scalar guts of matrix operations. This prepares the ground for the next stream, where all of this will be applied.
For more and more specific math learning I can’t recommend Khan Academy warmly enough, which also happens to be free.
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We introduce, solely for the purpose of application, matrix multiplication. We build up from where we left with inversion in previous streams, and then proceed into a solid 70 minutes run of pure nodelling goodness!
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Enjoy:
We finally manage to apply the theory from the previous stream, pile up some more, and apply again.
Somewhat long stream and eating into QnA to cover for that, but I’m glad we’re done with the first surface skimming for vectors and a bit of matrices.
Your feedback in the comments or on Twitter for videos like this is important. There’s a fine balance to be struck between blackboarding and application, and only the audience can tell whether it’s working or not.
Without further ado:
Day 6 – Wiring up IK pedals and applying vector math