Forum

Transforming Brains

It all starts naively simple, you make your cube/quad thing add a transform node and translate, scale, and even rotate and it all works in such an obvious and simple way, right? You tell yourself you got this and as self procalimed master of all things transforms carry on with your day.

We’ve all been there, maybe you are there right now, but surely and inevitably for all of us, sooner rather than later comes the day when you need to do something a bit more complicated, maybe there is already another transform you have no control over and you want to “add to it”, or change it, or combine it with your own and well, what one day seemed simple and obvious quickly turns into an obscure trial and error process which leaves us confused and often frustrated.

When and if you do decide to dig into it you get confronted with 4x4 transformation matrices, quaternions, euler angles and mentions of linear algebra. “Why did I not pay attention in maths class?” you ask yourself, “I never thought I would actually need this stuff”.

Well, welcome to the club!

Having experienced this myself all too recently, and through the process of finding support in our community to slowly get a hold of this topic, an initiative was born: Transforming Brains.

The name cleverly coined by @motzi reflects the spirit him, @baxtan and myself intend to bring into this. Our aim for now is to collect as much learning material around the topics of transformations, linear algebra, quaternions, coordinate systems, right and left handedness and the like.

Coming up with a well curated and organized index of learning material is a first step, which we hope will be eventually followed by webinars and video tutorials.

At this point I would like to invite you all to join the initiative, do drop a post here with any valuable links, book names or other resources you may know about, let us know if you have ideas for webinars and tutorials, and of course if you are having transform troubles, we are here to help!

We also have created a chatroom for the same purpose, join us here if you’d rather chat about it: https://app.element.io/#/room/#TransformingBrains:matrix.org

So yeah, there is that.

Over and out!

7 Likes

I could also need some work on this.

Dropping some links:
immersive linear algebra

https://www.3blue1brown.com/

https://betterexplained.com/ has some related material

If you want to transform your brains even more and throw more into the mix there’s also geometric algebra:

https://bivector.net/

Let’s remove Quaternions from every 3D Engine

5 Likes

I found this explanation of the identity matrix in Houdini and found it useful for my brain :)

1 Like

you also have to be careful of the conventions used. the video of houdini seems to use another convention than we do in vvvv. here is a guide i wrote a few years ago which gives an overview of the topics that are involved:

4 Likes

Great post/initiative @ravazquez
My 2cents…
Probably one of the most ‘famous’ (or understandable) books is 3D Math Primer for Graphics and Game Development by Fletcher Dunn (at least I found it a lot of times as a ‘reference’ regarding this topic)

4 Likes

I posted a link to an online document with my collection of links in the above mentioned matrix chat, but i guess it also has its place here:

[link removed, see below]

Feel free to add anything you deem useful.

This link was copied from the browser’s address bar and does not provide access to the document. Please use the Share menu to share directly with contacts or copy the link. Read more about the Safe Links feature.

thanks for the hint!

https://cryptpad.fr/pad/#/2/pad/edit/Zmkd9en2PDrAwHVHtoUzzz5L/