Softimage to Houdini guides

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Your very welcome.

Another v useful expression is: opdigits(“path”)

it's commonly used like this opdigits(“.”) ..ie, on it's own object. This expression gives you the ending number of any object.

ie,

geo1
geo2
geo3

if you put opdigits(“.”) in the tx channel, then each object would be at x=. This is a pretty useful expression when used with $OS.

BTW, the syntax is different as $OS is a shorthand for opname(“.”) and existed before opname(“.”) was around. It's in fact a throwback from Prisms which was the pre-cursor to the Houdini we know and love:

http://clustr.com/images/news/854/sfx_05.jpg [clustr.com]

Sage was the stand-alone node based add-on to Prisms which looks v much like Houdini does now (surprisingly so)!

http://clustr.com/images/news/854/sfx_04.jpg [clustr.com]

..I digress.
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Thanks everyone… all documents now updated.

:-)

I will extend the expressions with opdigits soon. thx
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paul
http://clustr.com/images/news/854/sfx_05.jpg [clustr.com]

Sage was the stand-alone node based add-on to Prisms which looks v much like Houdini does now (surprisingly so)!

http://clustr.com/images/news/854/sfx_04.jpg [clustr.com]

..I digress.

Those node-graphs are still totally readable, and probably useable, using today's conventions
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Updated expression with 2 more examples, one using opdigits and also a little intro to the text port to see the scene.

Hope there aren't many mistakes…

:-)
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Finally wrapped General concepts now I think… collapsed it all into one single PDF with frame numbers and well.. I will move now into the materials area as promised.

The chapters are still available inside a folder so you can pick that up if you want, not better, just lighter.

:-)

https://www.dropbox.com/sh/22l2sx82m75buxj/H-0buUQAUP [dropbox.com]

HoudiniGuides_GeneralConcepts.pdf


Enjoy
Edited by - May 6, 2014 09:46:17
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It's getting better and better :-)

again, thanks a ton for doing this!
Apprentice Attribute / Houdini 17.0.381 / GTX 970 - driver 411.63
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RobW
again, thanks a ton for doing this!
I second the last speaker.
Halfdan Ingvarsson
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Side Effects Software Inc
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First installation of shading

https://www.dropbox.com/sh/22l2sx82m75buxj/H-0buUQAUP [dropbox.com]

HoudiniGuides_Shading_Introduction.pdf
Edited by - May 6, 2014 09:46:22
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Just wanted to stop by again and say thanks Jordi. These are a really valuable resource.
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Thanks so much everybody for the nice messages, and hope you guys give it a good go and feel comfortable soon.

I will posting more tomorrow as I have a lot of work today in the office.

:-)
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Jordi,

gerat work!

couple of small things - pages 154-155 seem to have almost identical text
and is it a typo regarding vops in SHOP context becoming avalible only in version 11? I recall being able to combine shader in vops in Houdini 8(not sure about earlier versions thou)
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Fixed. thanks
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Jordy, tanks a billion, this is really wonderfull progressing in this land in conjunction with this pdf.

Don't know if devs listen but i'm dealing with some troubles with bevel and polyextrude…
Bevel misses “keep points shared” options of the polyextrude sop..
…and polyextrude sop misses badly collision management with insets and corners (so the bevelop too)
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Don't know if devs listen but i'm dealing with some troubles with bevel and polyextrude…
Bevel misses “keep points shared” options of the polyextrude sop..
…and polyextrude sop misses badly collision management with insets and corners (so the bevelop too)

Rest assured, we're here

Do you mind logging a pair of bugs for these, with a scene attached (and preferably some ‘expected result’ type thing).
Halfdan Ingvarsson
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Side Effects Software Inc
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I think Jordi is doing a wonderful job here.

Looking at the Houdini UI, it could benefit from some SI UI love ;-)

After reading up on Jordi's papers, I'll have a go with Houdini as well.
Apprentice Attribute / Houdini 17.0.381 / GTX 970 - driver 411.63
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Well… this one took me a bit of time… I am sure you will see why… ;-)

Let me know if there is many mistakes or you see issues…

https://www.dropbox.com/sh/22l2sx82m75buxj/H-0buUQAUP [dropbox.com]

HoudiniGuides_Shading_2_MiaMaterialVsMantraSurface.pdf


BTW, you will notice I have removed the folder with the chapters by themselves as they are now obsolete plus rename the chapters of the shading so they indicate the order to read them. They have slide numbers though but there you go..

Enjoy
Edited by - May 6, 2014 09:46:28
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RobW
Looking at the Houdini UI, it could benefit from some SI UI love ;-)


We have a thread for Si users thoughts on the UI. Post some thoughts

http://www.sidefx.com/index.php?option=com_forum&Itemid=172&page=viewtopic&t=31141 [sidefx.com]
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jordibares
Enjoy

'Houdini does not Nanny you", this tag line could be the next Houdini advertisement
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Very good job on shading, Jordi.
I like that you are demystifying what usually is a very overwhelming and intimidating part for new Houdini users.

Just one little nitpick. When you mention using a different subdivision level for rendering and animation, you might want to mention the “Render Polygons as Subdivisions” option at the Render tab on the Geometry node.

I understand it doesn´t give specific subdivision level options, but sometimes it´s a fast “fire and forget” option that allows for very high geometry subdivision at render time in the best Renderman-like tradition, and it´s somewhat controllable with the creaseweight attribute.

I mention this because it comes in handy for those projects where you need to subdivide but your OpenGL refuses to show it because apparently you want to break a new polygon number record.
Javier Meroño
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Netvudu
you might want to mention the “Render Polygons as Subdivisions” option at the Render tab on the Geometry node.

P.190 has this
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