Thanks,
I've read houdini manuals but they don't cover the problem.
Maybe it's not about l-system but general knowledge about attributes and parameters in houdini.
Peter
Found 172 posts.
Search results Show results as topic list.
Technical Discussion » L-system long variables problem?
- peliosis
- 175 posts
- Offline
Technical Discussion » Copying with local time?
- peliosis
- 175 posts
- Offline
Sorry to be so late,
Thanks for your suggestions, I haven't tried anything yet though.
I'll post my results if I'll solve this.
Peter
Thanks for your suggestions, I haven't tried anything yet though.
I'll post my results if I'll solve this.
Peter
Technical Discussion » Copying with local time?
- peliosis
- 175 posts
- Offline
I want to copy an animated object onto another one using a moving bounding object to select template points, so the copies would appear and die. The only problem is I'd like them to start their animation on creation (and perhaps end on death), for example cones growing on a sphere.
I haven't learned pops yet but I think it's quite an easy task with their help.
Is there a way to do it without pops, In houdini escape?
Peter
I haven't learned pops yet but I think it's quite an easy task with their help.
Is there a way to do it without pops, In houdini escape?
Peter
Technical Discussion » L-system long variables problem?
- peliosis
- 175 posts
- Offline
Houdini Lounge » The Great Divide in CG Facilities: Adapt or Die
- peliosis
- 175 posts
- Offline
I don't think it's just as easy as saying one thing renders faster than the other.
MR is a raytracer so no doubt it raytraces faster than mantra.
But use some textures (eliptical filtering enabled), heavy displacement, bump mapping, put a few hundred of lights, everything in a scene with thousands of instances, increase AA to “production” values and then test.
Everything depends on what you are rendering, but from my experience of 3 years in xsi, MR is not the best option when it comes to fast, flicker free rendering.
I rarely used bump maps and displacement in xsi because of poor performance, I avoided night scenes because of the number of lights, and haven't used FG/GI in animation because it always was overkill. Things will probably change with 3.4.
Mantra has slow raytracing, ambient occlusion compared to dirtmap shader in xsi is unusable I don't have a great knowledge of it but definitely it can't be called just “slower”
As for motion blur, most of the time it's better to use reel smart, especially in broadcast when speed is more important than absolute subpixel perfection.
So if I had an architectural animation with 2 weeks deadline, no renderfarm I'd definitely avoid MR.
cheers
Peter
MR is a raytracer so no doubt it raytraces faster than mantra.
But use some textures (eliptical filtering enabled), heavy displacement, bump mapping, put a few hundred of lights, everything in a scene with thousands of instances, increase AA to “production” values and then test.
Everything depends on what you are rendering, but from my experience of 3 years in xsi, MR is not the best option when it comes to fast, flicker free rendering.
I rarely used bump maps and displacement in xsi because of poor performance, I avoided night scenes because of the number of lights, and haven't used FG/GI in animation because it always was overkill. Things will probably change with 3.4.
Mantra has slow raytracing, ambient occlusion compared to dirtmap shader in xsi is unusable I don't have a great knowledge of it but definitely it can't be called just “slower”
As for motion blur, most of the time it's better to use reel smart, especially in broadcast when speed is more important than absolute subpixel perfection.
So if I had an architectural animation with 2 weeks deadline, no renderfarm I'd definitely avoid MR.
cheers
Peter
Technical Discussion » L-system long variables problem?
- peliosis
- 175 posts
- Offline
Thanks for a reply.
Now I'm sorry because of my obvious misinterpretation. In l-sys html help in limitations to the rules section there stays:“Variables can have up to 5 parameters”.
I tried a simple example with multi character variable which worked so I continued to use them without concern.
Could you explain or point where to find info about “multiparms” for variables?
What does that mean we can use up to 5 parameters for a variable?
Is there any more in depth houdini specific l-system manual?
I went through many algorithmic botany papers, but I'd like to know more details about houdini l-sys implementation.
Thank you
Peter
Now I'm sorry because of my obvious misinterpretation. In l-sys html help in limitations to the rules section there stays:“Variables can have up to 5 parameters”.
I tried a simple example with multi character variable which worked so I continued to use them without concern.
Could you explain or point where to find info about “multiparms” for variables?
What does that mean we can use up to 5 parameters for a variable?
Is there any more in depth houdini specific l-system manual?
I went through many algorithmic botany papers, but I'd like to know more details about houdini l-sys implementation.
Thank you
Peter
Technical Discussion » L-system long variables problem?
- peliosis
- 175 posts
- Offline
I use 7.0 231 apprentice on linux. It's written that variables can be up to 5 characters long, but when I use about 5 custom variables with names longer than one character, some of them just dont work=scrubbing them make no difference. as soon as I change them to one character it turns ok.
what could cause such a nasty behaviour?
P
what could cause such a nasty behaviour?
P
Technical Discussion » Houdini is crashing on Windows. nobody seems to know why.
- peliosis
- 175 posts
- Offline
It is very probable that the reason lies in open gl.
I have lots of problems with houdini on windows and absolutely no problems on linux (same machines)
On xp I had to check drivers, test them reinstall, choose the best option and still display quality is HORRIBLE, the performance is unstable and everything works like it's just about to crash.
On suse when i finally installed everything…oh boy, works like a charm.
Perhaps there are fresher and better drivers for linux, perhaps it's overall system stability.
It's better not to think what's wrong and move to linux. You'd be happier using XP for editing only.
cheers
Peter
I have lots of problems with houdini on windows and absolutely no problems on linux (same machines)
On xp I had to check drivers, test them reinstall, choose the best option and still display quality is HORRIBLE, the performance is unstable and everything works like it's just about to crash.
On suse when i finally installed everything…oh boy, works like a charm.
Perhaps there are fresher and better drivers for linux, perhaps it's overall system stability.
It's better not to think what's wrong and move to linux. You'd be happier using XP for editing only.
cheers
Peter
Houdini Lounge » The Great Divide in CG Facilities: Adapt or Die
- peliosis
- 175 posts
- Offline
Yes, and all the people talking about how hard and technical houdini is…
some time ago I was interested in maya and asked my maya friends many questions.
The main answer for “how to?” question was something like “oh, thats very simple, just about xxx lines of code”
That's funny, I don't know houdini even good, and I'm able to create in minutes things I thought about for days using different software.
I spoted a nice link at xsibase today, about rig scripting :
http://www.xsi-blog.com/?p=29#more-29 [xsi-blog.com]
cheers
Peter
some time ago I was interested in maya and asked my maya friends many questions.
The main answer for “how to?” question was something like “oh, thats very simple, just about xxx lines of code”
That's funny, I don't know houdini even good, and I'm able to create in minutes things I thought about for days using different software.
I spoted a nice link at xsibase today, about rig scripting :
http://www.xsi-blog.com/?p=29#more-29 [xsi-blog.com]
cheers
Peter
Technical Discussion » mantra verbose on linux
- peliosis
- 175 posts
- Offline
Technical Discussion » mantra verbose on linux
- peliosis
- 175 posts
- Offline
How to output render info to a console in linux?
When I check verbosity on, and in filename type “consolewait” like in XP or “konsole” (suse 9.3) it doesn't seem to work.
I checked the manual but ther is no detailed info.
Peter
When I check verbosity on, and in filename type “consolewait” like in XP or “konsole” (suse 9.3) it doesn't seem to work.
I checked the manual but ther is no detailed info.
Peter
Houdini Lounge » New great laptop
- peliosis
- 175 posts
- Offline
Problems with ati…mainly driver related probably. You can experience different bugs on different driver versions, I can tell you about mine.
When I first load a scene it seems ok (wireframe display is fast) after changing to shaded once, everything slows down even after backing off to wireframe.
Strange glitches of the interface, locking panels (not updating, displaying strange coloured boxes)
All spectrum of artifacts, especially these related to camera fov (you have to set it to very wide angle to see it shaded properly) etc. etc.
That does not mean I didn't forced it to work just fine, that was after hacking to fire gl on w2k and the speed wasn't much better than my old Ti 4600.
Apart from all of this, the card is great…for doom and halflife
Personally I'd never recommend an ati for serious 3D, just too much time spent on trying testing and getting frustrated.
Have I mentioned I'm unable to force 3D acceleration under suse 9.3?
Not any(!!!) problems with nvidia here also.
Just to add - openGL performance is better and more stable under linux.
As for laptops you can try toshiba tecra something, it has FX 6600 and is quite nice.
cheers
Peter
When I first load a scene it seems ok (wireframe display is fast) after changing to shaded once, everything slows down even after backing off to wireframe.
Strange glitches of the interface, locking panels (not updating, displaying strange coloured boxes)
All spectrum of artifacts, especially these related to camera fov (you have to set it to very wide angle to see it shaded properly) etc. etc.
That does not mean I didn't forced it to work just fine, that was after hacking to fire gl on w2k and the speed wasn't much better than my old Ti 4600.
Apart from all of this, the card is great…for doom and halflife
Personally I'd never recommend an ati for serious 3D, just too much time spent on trying testing and getting frustrated.
Have I mentioned I'm unable to force 3D acceleration under suse 9.3?
Not any(!!!) problems with nvidia here also.
Just to add - openGL performance is better and more stable under linux.
As for laptops you can try toshiba tecra something, it has FX 6600 and is quite nice.
cheers
Peter
Houdini Lounge » New great laptop
- peliosis
- 175 posts
- Offline
Are you sure you want an ati card?
I'm having constant problems in windows with radeon 9700 and I cannot get 3d acceleration to work on it under linux. Not many 3d guys would recommend ati. also, make as broad research as possible when it comes to notebook, there are many reviews.
The best choice is probably the m70, not too cheap though.
P
I'm having constant problems in windows with radeon 9700 and I cannot get 3d acceleration to work on it under linux. Not many 3d guys would recommend ati. also, make as broad research as possible when it comes to notebook, there are many reviews.
The best choice is probably the m70, not too cheap though.
P
Houdini Lounge » Houdini works on Slackware or Fedora?
- peliosis
- 175 posts
- Offline
Hi,
I'm also on suse 9.3 and I'm happy with it.
I don't know about other distributions but suse is easy to handle for a beginer.
It has great administration tools, perhaps more clear than windows.
Everything is fluent (ok…everything but booting) and houdini just rocks.
Only pain is lack of some drivers and no editing tools.
By the way, do you have any experience with crossover office? I;d like to run photoshop on linux, is it worth it?
Peter
I'm also on suse 9.3 and I'm happy with it.
I don't know about other distributions but suse is easy to handle for a beginer.
It has great administration tools, perhaps more clear than windows.
Everything is fluent (ok…everything but booting) and houdini just rocks.
Only pain is lack of some drivers and no editing tools.
By the way, do you have any experience with crossover office? I;d like to run photoshop on linux, is it worth it?
Peter
Technical Discussion » Atribute question
- peliosis
- 175 posts
- Offline
Ha,
I got it, $CR is point red color but I wanted any attribute. Thanks for the suggestion though.
I digged in the expression cookbook to find the “point” expression, it lets get any attribute from any SOP.
How great!
cheers
P
I got it, $CR is point red color but I wanted any attribute. Thanks for the suggestion though.
I digged in the expression cookbook to find the “point” expression, it lets get any attribute from any SOP.
How great!
cheers
P
Technical Discussion » Atribute question
- peliosis
- 175 posts
- Offline
Is there a possibility to create a group with points which attribute has certain value?
For example I apply a paint SOP on a geometry, it returns Cd attribute.
I'd like to create a group of points which Cd is between this and that.
I think it is possible but I don't have an idea how to do it. Place an expression into group channel? Can I access attribute values in expressions? Or maybe some VEX thing.
Thanks
Peter
For example I apply a paint SOP on a geometry, it returns Cd attribute.
I'd like to create a group of points which Cd is between this and that.
I think it is possible but I don't have an idea how to do it. Place an expression into group channel? Can I access attribute values in expressions? Or maybe some VEX thing.
Thanks
Peter
Houdini Lounge » Question for the developers: FBX Support?
- peliosis
- 175 posts
- Offline
Hmmm…motionbuilder was a good software, If alias wants to support it more, they should write a houdini plugin
These pr companies are pure fun. Don't you guys think they are so popular only because SESI doesn't care about marketing at all?
I only licked houdini but it's just pure power. It's master Yoda.
Now that I can compare it to others, they only make me laugh.
The competition looks pathethic with all their rainbow coloured slogans
produced by hardwired marketing heads.
P
These pr companies are pure fun. Don't you guys think they are so popular only because SESI doesn't care about marketing at all?
I only licked houdini but it's just pure power. It's master Yoda.
Now that I can compare it to others, they only make me laugh.
The competition looks pathethic with all their rainbow coloured slogans
produced by hardwired marketing heads.
P
Houdini Lounge » New great laptop
- peliosis
- 175 posts
- Offline
It is a great computer only the price is soooo freakin' high.
For that money I'd like it to have a beer fridge and a pcmcia glass holder
cheers
P
For that money I'd like it to have a beer fridge and a pcmcia glass holder
cheers
P
Houdini Lounge » New great laptop
- peliosis
- 175 posts
- Offline
I've read some pages about asus and linux
There really are some problems I just don't wan't to meet.
As JColdrick said it's better to choose a linux supporting company.
Just not to get angry all the time.
But I can't see an alternative at the moment, not so many vendors offer systems with new geforce cards
I looked at IBM since they are known to support linux but the only nvidia laptop is a laptop with an old nvidia
The thing is worth waiting a while though, I'm sure they'll appear at siggie or earlier.
I've learned too many times that rush is a bad advisor.
If I miss something please point it.
cheers
Peter
There really are some problems I just don't wan't to meet.
As JColdrick said it's better to choose a linux supporting company.
Just not to get angry all the time.
But I can't see an alternative at the moment, not so many vendors offer systems with new geforce cards
I looked at IBM since they are known to support linux but the only nvidia laptop is a laptop with an old nvidia
The thing is worth waiting a while though, I'm sure they'll appear at siggie or earlier.
I've learned too many times that rush is a bad advisor.
If I miss something please point it.
cheers
Peter
Technical Discussion » i3d driven isosurface update issue.
- peliosis
- 175 posts
- Offline
Ahead ?
of YOU?!
NO WAY!
Updating by hand is nothing horrible but a little workflow spoiler.
I'd like it to work like standard VOP shader buuilding, instant feedback.
cheers
Peter
of YOU?!
NO WAY!
Updating by hand is nothing horrible but a little workflow spoiler.
I'd like it to work like standard VOP shader buuilding, instant feedback.
cheers
Peter
-
- Quick Links