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Technical Discussion » Python exercises in Houdini ?
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- Lewul
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Technical Discussion » Python exercises in Houdini ?
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- Lewul
- 249 posts
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Well I'm only a beginner 
I know how to make a little ui, list what the user has written in the textfield, etc. But I don't know how to select sop nodes inside my objects, and how to select only the nodes that the user wrote. I really feel dumb. I don't blame Houdini, I know that it's my fault here.
I may need more tutorials on the subject, but even “Python and Houdini 11” from SideFX is not so simple.
But I don't need a lot for finishing the exercice. I know how to bypass, I have my list of words, my little ui (very simple of course), but how to select IN objects ? For example how to select xform and sphere only in geo1.

I know how to make a little ui, list what the user has written in the textfield, etc. But I don't know how to select sop nodes inside my objects, and how to select only the nodes that the user wrote. I really feel dumb. I don't blame Houdini, I know that it's my fault here.
I may need more tutorials on the subject, but even “Python and Houdini 11” from SideFX is not so simple.
But I don't need a lot for finishing the exercice. I know how to bypass, I have my list of words, my little ui (very simple of course), but how to select IN objects ? For example how to select xform and sphere only in geo1.
Technical Discussion » Python exercises in Houdini ?
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- Lewul
- 249 posts
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Technical Discussion » Python exercises in Houdini ?
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- Lewul
- 249 posts
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Technical Discussion » Python exercises in Houdini ?
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- Lewul
- 249 posts
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Hi everyone,
I'm learning Python, but the problem is that I do more theoretical (theory ?) than practice. So I don't progress.
Do you know where I can find little Python exercises in Houdini ?
Or can someone give me one ?
The problem is that so much thing are possible without scripting in Houdini that I don't even know what are the Python possibilities in Houdini…
Thanks !
I'm learning Python, but the problem is that I do more theoretical (theory ?) than practice. So I don't progress.
Do you know where I can find little Python exercises in Houdini ?
Or can someone give me one ?
The problem is that so much thing are possible without scripting in Houdini that I don't even know what are the Python possibilities in Houdini…
Thanks !
Technical Discussion » Group flip objects ?
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- Lewul
- 249 posts
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Is there a way to cache my displacement on disk instead off caching it on my ram during the render ?
Technical Discussion » Group flip objects ?
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- Lewul
- 249 posts
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Technical Discussion » Group flip objects ?
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- Lewul
- 249 posts
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Pretty sure that I have the same problem, except that I only have 16gbs :
http://forums.odforce.net/topic/17364-pbr-a-lot-of-displacement-ram-completely-filled-up/ [forums.odforce.net]
My scene is not optimize for rendering with big amount of displacement, so I might think about it…
http://forums.odforce.net/topic/17364-pbr-a-lot-of-displacement-ram-completely-filled-up/ [forums.odforce.net]
My scene is not optimize for rendering with big amount of displacement, so I might think about it…
Technical Discussion » Group flip objects ?
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- Lewul
- 249 posts
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Hi,
I did this setup only for showing you how it was on my other computer, it's actually working with the wave tank setup (and the popadvectbyvolumes is affecting my tank, which is flipobject_02 here).
You're right, it shouldn't be slow with two objects, and I think that it's coming from my cpu… When I render a simulation, it takes around 5 minutes to compute one frame, and then 10min, it keeps increasing and at frame 20 it was around 1h30 the frame… But, at the beginning, my cpu was at 100%, end at frame 20 it was at 2%… Which is not normal at all
(and I need to precise that my sim is just about making a pre-roll of my tank, so it shouldn't increase like this)
It started a render yesterday, of only one image, the samples were pretty high (but it's only one image so let's get crazy), but it's still rendering… But the cpu is at 100%.
I have this message on the Houdini console (it's still rendering my frame), it's seems that it has to do with the ram. I showed it to my stepfather (he is an engineer), and he just told me that the “0xFFFF…” was MAYBE not normal. I'm not an expert at all, and I feel a bit silly with this kind of thing… But maybe it's normal, my samples are high.
Thanks for your answer PradeepBarua !
I did this setup only for showing you how it was on my other computer, it's actually working with the wave tank setup (and the popadvectbyvolumes is affecting my tank, which is flipobject_02 here).
You're right, it shouldn't be slow with two objects, and I think that it's coming from my cpu… When I render a simulation, it takes around 5 minutes to compute one frame, and then 10min, it keeps increasing and at frame 20 it was around 1h30 the frame… But, at the beginning, my cpu was at 100%, end at frame 20 it was at 2%… Which is not normal at all

It started a render yesterday, of only one image, the samples were pretty high (but it's only one image so let's get crazy), but it's still rendering… But the cpu is at 100%.
I have this message on the Houdini console (it's still rendering my frame), it's seems that it has to do with the ram. I showed it to my stepfather (he is an engineer), and he just told me that the “0xFFFF…” was MAYBE not normal. I'm not an expert at all, and I feel a bit silly with this kind of thing… But maybe it's normal, my samples are high.
Thanks for your answer PradeepBarua !
Technical Discussion » Group flip objects ?
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- Lewul
- 249 posts
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It seems that my simulation is veeeeery slow when using multiple flip object inside one solver… Is it normal ? When I plug only one object it's pretty fast.
Technical Discussion » Group flip objects ?
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- Lewul
- 249 posts
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Hi everyone,
I have two flip objects in my dopnet, and I have a Pop Advect By Volume for advecting one of my flip object. But I don't know how to affect just one of them, and if I run the simulation the flip that I don't want to be advected is much slower than without the Pop Advect…
So I can I only affect one flip object in this kind of setup ? I tried with the Pop Group but I'm not able to use it correctly.
Thanks !
I have two flip objects in my dopnet, and I have a Pop Advect By Volume for advecting one of my flip object. But I don't know how to affect just one of them, and if I run the simulation the flip that I don't want to be advected is much slower than without the Pop Advect…
So I can I only affect one flip object in this kind of setup ? I tried with the Pop Group but I'm not able to use it correctly.
Thanks !
Technical Discussion » Mantra surface normal bump
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- Lewul
- 249 posts
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Technical Discussion » Blowtorch in Pyro ?
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- Lewul
- 249 posts
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Hey Icarus,
Thanks for your answer. I thought about it actually, I wasn't sure that it was a good solution. But you're right, I should try it…
But it can't be made with pyro ?
It's sometimes hard to get the look you want with pyro, and only for learning purposes it would be great if someone can explain it to me !
Thanks
Thanks for your answer. I thought about it actually, I wasn't sure that it was a good solution. But you're right, I should try it…
But it can't be made with pyro ?
It's sometimes hard to get the look you want with pyro, and only for learning purposes it would be great if someone can explain it to me !
Thanks
Houdini Lounge » Houdini 14 Wishlist
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- Lewul
- 249 posts
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Houdini Lounge » Houdini 14 Wishlist
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- Lewul
- 249 posts
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My only wish :
http://www.smashmycode.com/wp-content/uploads/2011/12/lenna.bmp [smashmycode.com]
Add her to the default pic !
http://www.smashmycode.com/wp-content/uploads/2011/12/lenna.bmp [smashmycode.com]
Add her to the default pic !
Work in Progress » Finished Work: VIRTUS
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- Lewul
- 249 posts
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Technical Discussion » Always open a scene at frame 1 ?
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- Lewul
- 249 posts
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Well, thanks for yours answers. I think that I really need to get myself more seriously into Python in Houdini (I'm just starting in Nuke)…
Technical Discussion » Always open a scene at frame 1 ?
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- Lewul
- 249 posts
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Technical Discussion » Always open a scene at frame 1 ?
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- Lewul
- 249 posts
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Hi everyone,
Is there a way to tell Houdini to start at frame 1 when we open a scene, or that he does not try to simulate to the frame we currently are (for example 15 or more). Sometimes it just doesn't want to go to frame 1 when we open the scene, it just try to simulate, and even by pressing esc Houdini never let me go to frame 1 UNTIL it has simulate the entire simulation…
Thanks,
Tom
Is there a way to tell Houdini to start at frame 1 when we open a scene, or that he does not try to simulate to the frame we currently are (for example 15 or more). Sometimes it just doesn't want to go to frame 1 when we open the scene, it just try to simulate, and even by pressing esc Houdini never let me go to frame 1 UNTIL it has simulate the entire simulation…
Thanks,
Tom
Technical Discussion » Maya ->Houdini ->Mari
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- Lewul
- 249 posts
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