Matrix - What the Crazy Node is this ? Topic is solved

Topics concerning ICE & Math
Falam

Matrix - What the Crazy Node is this ?

Post by Falam » 07 Oct 2013, 16:44

Can I use a Matrix to make a cartoon car rig ?

User avatar
Hirazi Blue
Administrator
Posts: 4918
Joined: 04 Jun 2009, 12:15

Re: Matrix - What the Crazy Node is this ?

Post by Hirazi Blue » 07 Oct 2013, 18:10

Please clarify your question (what you want to know and why it's specifically a "ICE & Math" question)...
...

User avatar
Daniel Brassard
Posts: 828
Joined: 18 Mar 2010, 23:38
Location: St. Thomas, Ontario

Re: Matrix - What the Crazy Node is this ?

Post by Daniel Brassard » 07 Oct 2013, 19:30

I concur with Hirazi on this one, if the question is not clear or open handed, it make it difficult to give you a proper reply.

BTW, have you seen this article from Michael Isner before?

http://www.isner.com/Transform/IsnerTra ... nip_04.htm
$ifndef "Softimage"
set "Softimage" "true"
$endif

Falam

Re: Matrix - What the Crazy Node is this ?

Post by Falam » 08 Oct 2013, 03:10

I have a carbon copy of the Micheal Isner article :) It explains, but it can be a little 'deep' ! How can I use Matrices to make a car suspension ?

luceric
Posts: 1202
Joined: 22 Jun 2009, 00:08

Re: Matrix - What the Crazy Node is this ?

Post by luceric » 08 Oct 2013, 03:49

with softimage 2011 we shipped a copy of Craft Animation Studio, which had a car rig, although I've never tried it
http://xsisupport.com/2010/04/02/craft- ... image-2011


there is an extensive car rig tutorial for xsi here
http://www.andynicholas.com/?p=1549

Falam

Re: Matrix - What the Crazy Node is this ?

Post by Falam » 08 Oct 2013, 04:32

Thanks LucEric. I was hoping for something based on ICE, no hard feelings, all is good :)

EricTRocks
Moderator
Posts: 754
Joined: 25 Nov 2009, 01:41

Re: Matrix - What the Crazy Node is this ?

Post by EricTRocks » 08 Oct 2013, 23:49

Falam wrote:...but it can be a little 'deep'...
This shit ain't easy to do, thus why people get paid to do it.
Eric Thivierge
Lead Kraken Developer, Fabric Engine
http://fabric-engine.github.io/Kraken

Falam

Re: Matrix - What the Crazy Node is this ?

Post by Falam » 09 Oct 2013, 01:32

EricTRocks wrote:
Falam wrote:...but it can be a little 'deep'...
This shit ain't easy to do, thus why people get paid to do it.
I realize that ! :ymapplause: :-q

Moderator edit: I am planning to move this fun little thread back to the "Vanilla ICE" forum soon,
unless someone can prove it's useful to keep it in the "ICE & Math" subforum specifically... - HB

NightroadAX
Posts: 19
Joined: 16 Nov 2010, 04:23

Re: Matrix - What the Crazy Node is this ?

Post by NightroadAX » 25 Oct 2013, 20:13

Personally I don't get matrix stuff either. I know that Mesh.kine.global returns a 4x4 matrix, but I don't get what each value represents.
All I understand so far..
[1,0,0,0] :: sclX?,?, ?, ?
[0,1,0,0] :: ?, sclY?, ?, ?
[0,0,1,0] :: ?, ?, sclZ?, ?
[0,0,0,1] :: posX, posY, posZ, ?

But even there... the sclXYZ values are affected when the object is rotated..? So I get totally lost.. :-\
Can someone post a breakdown? It's a bit sad, this seems like something that would have been extensively documented a few versions back..

Pooby
Posts: 495
Joined: 27 Aug 2010, 22:25

Re: Matrix - What the Crazy Node is this ?

Post by Pooby » 25 Oct 2013, 20:21

Matrices don't necessarily have to be understood mathematically to make use of them.

I use them all the time to good effect and I have no idea how they work mathematically. What is useful is knowing what they can do. Ie, parenting-like operations.

luceric
Posts: 1202
Joined: 22 Jun 2009, 00:08

Re: Matrix - What the Crazy Node is this ?

Post by luceric » 25 Oct 2013, 21:14

Image
(.. no one can tell you what the matrix is..)
Last edited by luceric on 28 Oct 2013, 01:42, edited 2 times in total.

Falam

Re: Matrix - What the Crazy Node is this ?

Post by Falam » 26 Oct 2013, 01:59

:))
The Matrix is the world that has been pulled over your eyes to blind you from the truth

User avatar
csaez
Posts: 253
Joined: 09 Jul 2012, 15:31
Skype: csaezmargotta
Location: Sydney, Australia

Re: Matrix - What the Crazy Node is this ?

Post by csaez » 27 Oct 2013, 17:25

NightroadAX wrote:Can someone post a breakdown?
AFAIK:

[1,0,0,0] :: X-axis direction, 0
[0,1,0,0] :: Y-axis direction, 0
[0,0,1,0] :: Z-axis direction, 0
[0,0,0,1] :: position, 1

Scaling is embedded diagonally (multiplying everything) and rotation is implicit to the axes' direction... there is a convenient fourth column because square matrices (rows == columns) are much easier to work with.

User avatar
Hirazi Blue
Administrator
Posts: 4918
Joined: 04 Jun 2009, 12:15

Re: Matrix - What the Crazy Node is this ?

Post by Hirazi Blue » 27 Oct 2013, 18:43

A nice article by Simon Anderson on the topic of Matrices in Softimage can be found here.
...

Falam

Re: Matrix - What the Crazy Node is this ?

Post by Falam » 28 Oct 2013, 01:28

Hirazi Blue wrote:A nice article by Simon Anderson on the topic of Matrices in Softimage can be found here.
This is helpful, and the kind of information that I was opening the door to, with my original post. The post was not meant to have a specific question, the post was to open the door for everyone that were confused, and wanted a break down of Matrices.

Bullit
Moderator
Posts: 2431
Joined: 24 May 2012, 09:44

Re: Matrix - What the Crazy Node is this ?

Post by Bullit » 28 Oct 2013, 05:39

So it can be said that a Matrix is a spreadsheet?