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Houdini Indie and Apprentice » My File Does Not Match Tutorial?
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- eetu
- 606 posts
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You had set your birth rate to 0.1, which equals 1 particle every 10 seconds. With that birth rate you never had more than one particle emitted - so no curve.
Technical Discussion » Quantifying illuminance
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- eetu
- 606 posts
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I suppose the light buffers are luminance not illuminance.
For very simple cases you should be able to build your own shader with an illuminance loop [sidefx.com] and output the raw incoming values, but it will most probably become unwieldy when multiple bounces and such come into play.
For a more modern solution I could imagine a custom bsdf [sidefx.com] that would always bounce all light back to camera, but that's not trivial. Dunno if you could sidestep the multiple bounces issue with labels [sidefx.com]..?
All in all, I don't see a simple solution - but maybe someone has a clever trick up their sleeves
For very simple cases you should be able to build your own shader with an illuminance loop [sidefx.com] and output the raw incoming values, but it will most probably become unwieldy when multiple bounces and such come into play.
For a more modern solution I could imagine a custom bsdf [sidefx.com] that would always bounce all light back to camera, but that's not trivial. Dunno if you could sidestep the multiple bounces issue with labels [sidefx.com]..?
All in all, I don't see a simple solution - but maybe someone has a clever trick up their sleeves
Houdini Indie and Apprentice » Broken attribute queries (Pivot + $CEX,Y,Z)
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- eetu
- 606 posts
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I guess it might be both
Something really is fishy there; the pivot actually is at the centroid if you rotate it, but it shows as zero in the UI. Even the ch() reference to it seems borked, yes.
The detail version works if your expression reference is right, see attached. Direct reference works if you use centroid() expression instead of the local variable.
Something really is fishy there; the pivot actually is at the centroid if you rotate it, but it shows as zero in the UI. Even the ch() reference to it seems borked, yes.
The detail version works if your expression reference is right, see attached. Direct reference works if you use centroid() expression instead of the local variable.
Houdini Indie and Apprentice » Pyro inside static object not working
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- eetu
- 606 posts
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There were two problems. The Blast SOP made your source geo to not have any real volume, so there was not really much fuel being inserted to your sim. Secondly, pyro always uses the volume collision in the collider object, even though you had selected surface collisions, and the default settings resulted in a solid muzzle.
Technical Discussion » how to get at curvature?
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- eetu
- 606 posts
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SamHancock
Does anybody know how to make a local variable if one doesn't exist (without creating another attribute).
Looks like one can just create a “varmap” string detail attribute and give it a value “curvature -> CURVATURE” and it works..
Technical Discussion » Smoke container delete resize_container node warning.
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- eetu
- 606 posts
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If there are some expression references breaking up, you could just disable the resize node instead of deleting it.
Technical Discussion » can digita asset don't pack all to one node?
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- eetu
- 606 posts
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Also, you can just select a sequence of nodes and drag them to the shelf - it creates a button for you. When you press the button, it recreates those same nodes.
Technical Discussion » Mantra surface normal bump
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- eetu
- 606 posts
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Yes, normal maps are a pain in Houdini at the moment.
If you post your hip file and an image of what the head should look like, we could take a peek..
If you post your hip file and an image of what the head should look like, we could take a peek..
SI Users » copy per primitive (Polygon)
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- eetu
- 606 posts
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Houdini Lounge » Save groups into seperate files
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- eetu
- 606 posts
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You could do use a File SOP inside a ForEach SOP set to run over each group. Set the filename to use stamps(“..”, “FORVALUE”,0) to name the obj according to group.
SI Users » Houdini Into Production - what features lacks
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- eetu
- 606 posts
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SreckoM
Would love to see LSCM unwrap and scaling and packing of UVs.
There is this old thing http://www.fourthwall.ndo.co.uk/HT_HDK_UVunwrapLSCM.html [fourthwall.ndo.co.uk]
and corresponding thread http://forums.odforce.net/topic/6002-lscm-texture-unwrapping/ [forums.odforce.net]
And relating other stuff http://www.fourthwall.ndo.co.uk/HT_HDK.html [fourthwall.ndo.co.uk]
Not very plug-n-play though..
Houdini Indie and Apprentice » how to get the largest circle inside a convex shape
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- eetu
- 606 posts
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How about visiting the sister thread at odforce?
http://forums.odforce.net/topic/20968-how-to-get-the-largest-circle-inside-a-concave-shape/ [forums.odforce.net]
http://forums.odforce.net/topic/20968-how-to-get-the-largest-circle-inside-a-concave-shape/ [forums.odforce.net]
Houdini Indie and Apprentice » Very simple use of Connect Adjacent Pieces does not work
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- eetu
- 606 posts
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Houdini Indie and Apprentice » Very simple use of Connect Adjacent Pieces does not work
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- eetu
- 606 posts
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I've had that lately as well. Try creating another obj and selecting that, I've seen the selected object disappear lately. Or try opengl 2.1 or rendering.
http://forums.odforce.net/topic/20921-all-geometry-suddenly-appear-transparent-in-the-viewport/ [forums.odforce.net]
http://forums.odforce.net/topic/20921-all-geometry-suddenly-appear-transparent-in-the-viewport/ [forums.odforce.net]
Houdini Indie and Apprentice » Very simple use of Connect Adjacent Pieces does not work
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- eetu
- 606 posts
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Hello again,
A bit hard to say what's wrong as I'm not sure what is the exact effect you're aiming for. At least the search radius was a bit low, plus the ForEach is a bit redundant, as each execution loop is identical.
A bit hard to say what's wrong as I'm not sure what is the exact effect you're aiming for. At least the search radius was a bit low, plus the ForEach is a bit redundant, as each execution loop is identical.
Technical Discussion » how delete all my group?
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- eetu
- 606 posts
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Technical Discussion » script : change parameter value on condition
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- eetu
- 606 posts
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This should be pretty straightforward, maybe share your scene so we can better advise?
Houdini Indie and Apprentice » Houdini Apprentice Crashing
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- eetu
- 606 posts
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If you first installed VC9 and then VC11, maybe some of the running houdini/licence services did not get overwritten, and are still VC9?
Technical Discussion » Flip elasticity node gone?
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- eetu
- 606 posts
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You need to set up strain forces for your fluid, check the attached for a quick example.
Technical Discussion » importing molecular data gPDB and PDB format
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- eetu
- 606 posts
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This is very interesting stuff!
At one point I started on PDB importer of my own, I hooked up BioPython and thought to use its PDB parsing functionality.
Then the Houdini gpdb came out and I got side-sidetracked to another sidetrack and it's been gathering dust since..
Anyway, the BioPython documentation might offer some additional insights into the format: http://biopython.org/DIST/docs/tutorial/Tutorial.html#sec156 [biopython.org]
Looking forward to your progress here!
At one point I started on PDB importer of my own, I hooked up BioPython and thought to use its PDB parsing functionality.
Then the Houdini gpdb came out and I got side-sidetracked to another sidetrack and it's been gathering dust since..
Anyway, the BioPython documentation might offer some additional insights into the format: http://biopython.org/DIST/docs/tutorial/Tutorial.html#sec156 [biopython.org]
Looking forward to your progress here!
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