How do I display the total polygon count for the whole scene in Houdini?
In Maya, we need to create a project in oder to have better file management. How about in Houdini? Do we need to set a Project in Houdini? (like renderman workspace)
how can i render curve with renderman renderer in houdini?
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Technical Discussion » houdini questions
-
- brucelay
- 313 posts
- Offline
Houdini Lounge » OT/FYI: AniFest '04
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- xiondebra
- 543 posts
- Offline
FYI, Just wanted to pass this along:
========================================================
The deadline for student and faculty submissions to AniFest 04 is February
28, 2004. Anifest is a regional computer animation festival held on the
campus of Western Connecticut State University. This year the festival is
scheduled April 27-29.
Information regarding the Student Competition (forms, etc.) can be found at
http://cs.wcsu.edu/grg [cs.wcsu.edu]
Faculty are also invited to submit materials, both to the animation
festival as well as to the exhibit, “The Art of Animation”. No forms are
required for faculty submissions.
William Joel, Director
Graphics Research Group
WCSU
joelw@wcsu.edu
_______________________________________________
Cg-educators mailing list
Cg-educators@lists.siggraph.org
http://lists.siggraph.org/mailman/listinfo/cg-educators [lists.siggraph.org]
========================================================
The deadline for student and faculty submissions to AniFest 04 is February
28, 2004. Anifest is a regional computer animation festival held on the
campus of Western Connecticut State University. This year the festival is
scheduled April 27-29.
Information regarding the Student Competition (forms, etc.) can be found at
http://cs.wcsu.edu/grg [cs.wcsu.edu]
Faculty are also invited to submit materials, both to the animation
festival as well as to the exhibit, “The Art of Animation”. No forms are
required for faculty submissions.
William Joel, Director
Graphics Research Group
WCSU
joelw@wcsu.edu
_______________________________________________
Cg-educators mailing list
Cg-educators@lists.siggraph.org
http://lists.siggraph.org/mailman/listinfo/cg-educators [lists.siggraph.org]
Technical Discussion » Coalision detection/dinamic interaction/Rigid BD between two
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- Ben Lumumba
- 58 posts
- Offline
Coalision detection/dinamic interaction/Rigid BD between two object
Greetings
I have a question regarding body detection at geometry level
This is example:
I ?Lm a drummer,have a drummer_stick and want to play metal_plate/chinnely or how it is called
As soon as a tip of my drummer_stick hit a plate,plate must swing under the beat and contunue swinging
As I hit harder it swings with higher amplitude and vice-verse
Or intercepting swinging with repeated hitting
Also,you can think of slapping me with your palm and my head turns under your slap,or reapetitious slapping,just simple fighting
I need that features of interacting between object as essentials
I see it as backbone of any 3D tool
Is there some tips&trick out there,not willing to be feeded but rather
to explore
Solution A) CHOP approach
I think that I attach null to tip of my “drummer_stick”,“ I call it ”stick_tip_null“,and than with ”object CHOP“ bind motion of plate with stick_tip_null
It is ”inverse squere distance“ which give closest value between the two,meaning as soon as tip of my drummer stick comes close to the plate,
a minimal distance,a impulse is fired,which in turn means in that moment I add (with offsetting)a swing(actuallly rotation around x and z axes) to plate
That is a CHOP approach-Rollercoaster tutorial.
THE PROBLEM A_1): But the problem arises when intercepting the plate swing after first hit,repeatitious hitting of swinging plate as it can be seen
in attached file.It has to respond dinamicaly upon the every seqenced hit
The PROBLEM A_2):The swinging of the plate must responda approprietely to
power of the hit;as I hit harder it swings with higher amplitude and vice-verse.
Solution A_2.1 Maybe I can bind the amplitude of swinging with
the time drummer_stick_tip needs to hit the plate,meaning less time,
stronger hit,higher amplitude of the plate amplitude
Solution A_2.2 Or to use path lenght,meaning shorter path,weaker hit,
lower amplitude of plate swing
Solution A_2.3 Velocity if I can call it the both solution above,meaning
the time stick needs to hit plate,and the path/distance between stick
and the plate
Solution B) Coalision detection approach object/geometry level or rigid body dinamics
(I don?Lt kknow if I can user RBD at all for this case of simulation,but I ?Ll give it a try.)
It is simple and better solution I think,it just detects coalision between the two object and one object tries to ”avoid“ detection reacting upon action (plate ”jumps" under the stick beats) adding
than additional motions either manually or with automation( CHOP) , rotation around x and z axes, again swinging
I attached the file?Ls link:
http://odforce.net/forum/index.php?s=8d7d563b152fe6e566b63bdb50e19849&act=ST&f=15&t=1699 [odforce.net]
Best regards,
Ben
ben_lumumb@chello.at
Greetings
I have a question regarding body detection at geometry level
This is example:
I ?Lm a drummer,have a drummer_stick and want to play metal_plate/chinnely or how it is called
As soon as a tip of my drummer_stick hit a plate,plate must swing under the beat and contunue swinging
As I hit harder it swings with higher amplitude and vice-verse
Or intercepting swinging with repeated hitting
Also,you can think of slapping me with your palm and my head turns under your slap,or reapetitious slapping,just simple fighting
I need that features of interacting between object as essentials
I see it as backbone of any 3D tool
Is there some tips&trick out there,not willing to be feeded but rather
to explore
Solution A) CHOP approach
I think that I attach null to tip of my “drummer_stick”,“ I call it ”stick_tip_null“,and than with ”object CHOP“ bind motion of plate with stick_tip_null
It is ”inverse squere distance“ which give closest value between the two,meaning as soon as tip of my drummer stick comes close to the plate,
a minimal distance,a impulse is fired,which in turn means in that moment I add (with offsetting)a swing(actuallly rotation around x and z axes) to plate
That is a CHOP approach-Rollercoaster tutorial.
THE PROBLEM A_1): But the problem arises when intercepting the plate swing after first hit,repeatitious hitting of swinging plate as it can be seen
in attached file.It has to respond dinamicaly upon the every seqenced hit
The PROBLEM A_2):The swinging of the plate must responda approprietely to
power of the hit;as I hit harder it swings with higher amplitude and vice-verse.
Solution A_2.1 Maybe I can bind the amplitude of swinging with
the time drummer_stick_tip needs to hit the plate,meaning less time,
stronger hit,higher amplitude of the plate amplitude
Solution A_2.2 Or to use path lenght,meaning shorter path,weaker hit,
lower amplitude of plate swing
Solution A_2.3 Velocity if I can call it the both solution above,meaning
the time stick needs to hit plate,and the path/distance between stick
and the plate
Solution B) Coalision detection approach object/geometry level or rigid body dinamics
(I don?Lt kknow if I can user RBD at all for this case of simulation,but I ?Ll give it a try.)
It is simple and better solution I think,it just detects coalision between the two object and one object tries to ”avoid“ detection reacting upon action (plate ”jumps" under the stick beats) adding
than additional motions either manually or with automation( CHOP) , rotation around x and z axes, again swinging
I attached the file?Ls link:
http://odforce.net/forum/index.php?s=8d7d563b152fe6e566b63bdb50e19849&act=ST&f=15&t=1699 [odforce.net]
Best regards,
Ben
ben_lumumb@chello.at
Houdini Lounge » O.T.,ignore it;anybody in Vienna area,Austria
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- Ben Lumumba
- 58 posts
- Offline
Hi
Just curious if there is anybody out there in this area,Vienna,Austria
Best regards,
Ben
Just curious if there is anybody out there in this area,Vienna,Austria
Best regards,
Ben
Technical Discussion » trail effect
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- leo3d
- 19 posts
- Offline
i want make a trail effect like the link image
http://odforce.net/forum/uploads/post-21-1075908233.gif [odforce.net]
anyone can help me ?,thank very much
http://odforce.net/forum/uploads/post-21-1075908233.gif [odforce.net]
anyone can help me ?,thank very much

Houdini Lounge » Houdini for x86-Solaris?
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- MG
- 108 posts
- Offline
Out of curiousity, are there any plans for releasing Houdini for x86-Solaris?
I'd like to try that out.
I'd like to try that out.
Technical Discussion » particle goal effect
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- leo3d
- 19 posts
- Offline
I want make a particle goal effect (like maya can do),and i want the particle flow and about on a surface,one side to anther side.waht shall i do .
Houdini Lounge » CHOPs viewer handles in OTLs
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- digitallysane
- 1192 posts
- Offline
I think it would be a nice addition to OTLs functionality to allow the “publishing” of CHOPs viewport handles. At this moment, if I have a complex CHOP network inside an OTL, I can only have parameters of its operators in the Parameters box of the OTL. If I was careful and left the display flag on for the CHOPs I'm interested in, I can open a floating viewer pane, set it to CHOPs context, and navigate inside the OTL to see the graphs update as I tweak the parameters of the OTL. But I want to be able to manipulate them using the handles in the viewer, the way I can with SOPs, objects etc.
Dragos
Dragos
Houdini Lounge » i3d and vector fields in POPs and SOPs
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- xiondebra
- 543 posts
- Offline
Hi,
Are there any OPs already defined in POPs or SOPs to read an i3d file then use the vectors in the i3d file for vector fields?
Or do I need to do this in VEX (or the HDK)?
Thanks,
Mark
Are there any OPs already defined in POPs or SOPs to read an i3d file then use the vectors in the i3d file for vector fields?
Or do I need to do this in VEX (or the HDK)?
Thanks,
Mark
Houdini Lounge » Looking for freelance Houdini artists
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- nwray
- 1 posts
- Offline
CBS Digital is looking for Houdini artists for an upcoming TV movie. We will be starting work on this at the beginning of Feb. We are looking for someone with strong particles skills. Anyone interested should contact: Niel Wray at (323)575-2310 or you can email him at: niel.wray@tvc.cbs.com
Houdini Lounge » od[wiki]
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- jason_iversen
- 12985 posts
- Offline
Hi all,
Just to let everyone know that we've set up a WikiWikiWeb on od for Houdini and its secret arts.
http://www.odforce.net/odwiki [odforce.net]
A WikiWikiWeb is a truly shared community database where visitors are free to edit and enhance the site at will. There is already some very good information gathering there, so please visit.
Jason
Just to let everyone know that we've set up a WikiWikiWeb on od for Houdini and its secret arts.
http://www.odforce.net/odwiki [odforce.net]
A WikiWikiWeb is a truly shared community database where visitors are free to edit and enhance the site at will. There is already some very good information gathering there, so please visit.
Jason
Houdini Lounge » Shaders from 3rd party sources
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- xiondebra
- 543 posts
- Offline
Hi folks,
A student of mine asked me a question (I couldn't answer), “Why aren't there more shaders shipped with Houdini?”. And followed it with, “Are there any 3rd party sources offering VEX shaders?”.
I don't know of any other sources than SESI; anyone know of any 3rd party source(s) for good shaders?
Thanks!
–Mark
A student of mine asked me a question (I couldn't answer), “Why aren't there more shaders shipped with Houdini?”. And followed it with, “Are there any 3rd party sources offering VEX shaders?”.
I don't know of any other sources than SESI; anyone know of any 3rd party source(s) for good shaders?
Thanks!
–Mark
Technical Discussion » Houdini won't run under Win2K
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- Stremik
- 170 posts
- Offline
Windows 2000 Pro
AMD Athlon XP 2000+
Abit KR7A-133R MoBo
MSI GeForce TI 4600 128MB (SoftQuadroed to Quadro4 980 XGL)
Corsair PC 2700 XMS 512MB
Maxtor 40GB HDD
D-Link DFE-530TX+ PCI Adapter
This is by far the most bizzare thing I've encountered in Win2k!!!
At first, Houdini works fine. Than ,out of nowhere I'm starting to get this error.
Every time I restart or shutdown Windows, a dialog box appears saying
that “explorer.exe” doesn't respond and I have to force the shutdown
by pressing on “End Now” button. And that's when Houdini stops working!
Everything else seems to be working and only Houdini is being affected.
When I try to start Houdini, only the splash screen and in the lower right corner of the screen Houdini Console appear for a sec and that's it.
Can't start the Lisence Manager ither.
I thought maybe one of the programs that I've installed lately screwes up
something therefore, I reinstalled Windows couple of times allready but every time, this waky beheviour would take place without any relation to any installed program. Every time, the last program I've installed would be
a different one.
Also, I've tried to just reinstall Houdini and it helps but only for a couple of runs. I'm able to start it once or twice and than it breaks again.
Did anyone run across something like this in the past?
I'm frustrated! :evil:
Heeeelp!
AMD Athlon XP 2000+
Abit KR7A-133R MoBo
MSI GeForce TI 4600 128MB (SoftQuadroed to Quadro4 980 XGL)
Corsair PC 2700 XMS 512MB
Maxtor 40GB HDD
D-Link DFE-530TX+ PCI Adapter
This is by far the most bizzare thing I've encountered in Win2k!!!
At first, Houdini works fine. Than ,out of nowhere I'm starting to get this error.
Every time I restart or shutdown Windows, a dialog box appears saying
that “explorer.exe” doesn't respond and I have to force the shutdown
by pressing on “End Now” button. And that's when Houdini stops working!
Everything else seems to be working and only Houdini is being affected.
When I try to start Houdini, only the splash screen and in the lower right corner of the screen Houdini Console appear for a sec and that's it.
Can't start the Lisence Manager ither.
I thought maybe one of the programs that I've installed lately screwes up
something therefore, I reinstalled Windows couple of times allready but every time, this waky beheviour would take place without any relation to any installed program. Every time, the last program I've installed would be
a different one.
Also, I've tried to just reinstall Houdini and it helps but only for a couple of runs. I'm able to start it once or twice and than it breaks again.
Did anyone run across something like this in the past?
I'm frustrated! :evil:
Heeeelp!
Technical Discussion » Bug is back again in 208 (was fixed in 200)
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- Buhrmi
- 15 posts
- Offline
Hi,
in 208 SOP mode, the menu options for Front/Back Polygon selecting (Pane Menu->Select->Polygon overlapping) and Box/Lasso picking are mixed up again. The selectionmode and polygonoverlapping icons on the left hand side don't work either as they are supposed (functions mixed up).
buhrmi
in 208 SOP mode, the menu options for Front/Back Polygon selecting (Pane Menu->Select->Polygon overlapping) and Box/Lasso picking are mixed up again. The selectionmode and polygonoverlapping icons on the left hand side don't work either as they are supposed (functions mixed up).
buhrmi
Technical Discussion » BUG still there in 6.1.200
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- jason_iversen
- 12985 posts
- Offline
I ran into this bug again almost immediately in 6.1.200.
http://www.sidefx.com/forum/viewtopic.php?t=1903 [sidefx.com]
http://www.sidefx.com/forum/viewtopic.php?t=1903 [sidefx.com]
Technical Discussion » Cut (Ctrl+X) not working correctly in VEX code editor.
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- jason_iversen
- 12985 posts
- Offline
6.1.200
It seems like there is an bug in the VEX code editor.
It deletes the hightlighted text but doesnt put it in the copy-buffer.
Also, a small RFE: could you please add line numbers to the text editor? The results from the Test Compile quotes the compilation error line numbers and it'd be useful to see them.
Thanks
Jason
It seems like there is an bug in the VEX code editor.
It deletes the hightlighted text but doesnt put it in the copy-buffer.
Also, a small RFE: could you please add line numbers to the text editor? The results from the Test Compile quotes the compilation error line numbers and it'd be useful to see them.
Thanks

Jason
Technical Discussion » BVH motion capture file import
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- nicholas_yue
- 301 posts
- Offline
I am attempting to import BVH for use in Houdini Apprentice.
Some of the BVH files works but most do not.
Must the BVH be constructed/prepared in specific ways in order for mcbiovision.exe to work reliably.
Which tools prepare BVH which are compatible with Houdini?
Cheers
Some of the BVH files works but most do not.
Must the BVH be constructed/prepared in specific ways in order for mcbiovision.exe to work reliably.
Which tools prepare BVH which are compatible with Houdini?
Cheers
Technical Discussion » Need help with otl
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- Dragon Ranger
- 18 posts
- Offline
:? I am Having some problems getting my otl to accept prefixes for groups that are created at runtime.
I Posting a file in the hopes that someone will know what to do.
http://www.mygraph.net/houdini/files/eye3.hipnc [mygraph.net]
Built using version 6.1.200
Comments and suggestions more than welcome, they are required
I Posting a file in the hopes that someone will know what to do.
http://www.mygraph.net/houdini/files/eye3.hipnc [mygraph.net]
Built using version 6.1.200
Comments and suggestions more than welcome, they are required

Technical Discussion » embedding HTML + CCS & Images into OTLs
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- Carlos
- 104 posts
- Offline
(since the 6.1 early access forum section has been locked), I'm re-posting this question here:
So, I've spent some time trying to figure this out
I know you can paste HTML code into the help tab of a custom op
BUT HOW do I get it to find the images + css and scripts?
I figured that it would look for them in the following if I used the following code:
<img src=“graphics/blah.gif” width=“5” height=“10”>
config/Help/vop/images/
config/Help/vop/css/
config/Help/vop/etc/
in your $HOME/Houdini6.1 folder
That will not work, unless I stick those folders (images, css, etc) into the MAIN houdini folder
F
Houdini/Houdini6.1.200/config/Help/vop/images/“
F
Houdini/Houdini6.1.200/config/Help/vop/css/”
F
Houdini/Houdini6.1.200/config/Help/vop/etc/"
(ignore the forward slash for this post)
Has anyone worked this out yet? Ideally, it would be nice to be able to just point to the html file in the help tab - that way the html file would know where it resides and know to look in it's relative path to find the needed files.
–Carlos
So, I've spent some time trying to figure this out
I know you can paste HTML code into the help tab of a custom op
BUT HOW do I get it to find the images + css and scripts?
I figured that it would look for them in the following if I used the following code:
<img src=“graphics/blah.gif” width=“5” height=“10”>
config/Help/vop/images/
config/Help/vop/css/
config/Help/vop/etc/
in your $HOME/Houdini6.1 folder
That will not work, unless I stick those folders (images, css, etc) into the MAIN houdini folder
F

F

F

(ignore the forward slash for this post)
Has anyone worked this out yet? Ideally, it would be nice to be able to just point to the html file in the help tab - that way the html file would know where it resides and know to look in it's relative path to find the needed files.
–Carlos
Technical Discussion » help! mantra net render
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- ykcosmo
- 288 posts
- Offline
I have installed houdini 6.1 on both of my computer, and I make sure that
the hserver is runing.
When I use “mantra -h boyzzz,powerfox”(the “boyzzz and powerfox”are the hostname of my two computers) in the mantra command.but it didn't use netrender, only render on boyzzz!!!!
the hserver is runing.
When I use “mantra -h boyzzz,powerfox”(the “boyzzz and powerfox”are the hostname of my two computers) in the mantra command.but it didn't use netrender, only render on boyzzz!!!!
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