I would like to make a ‘shadowmapped point light’ with six 90deg spotlights.
I'm at a loss how to make a spotlight cast a rectangle instead of the usual circular mask. An all-white projection map doesn't do the trick, and i can't find any relevant rendering param either.
I guess I could make a small rectangular projection map that fits inside the spot circle and make the spot so wide that the small rectangle fits the 90deg projection angle. Of course the shadow map projection angle would need to be decoupled and adjusted appropriately.
With a little bit of math it should all line up, but I'm wondering if there is some way of getting rid of the default circular mask.
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Technical Discussion » Rectangular spotlight
- eetu
- 606 posts
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Technical Discussion » Llinux LD_LIBRARY_PATH and mantra startup
- eetu
- 606 posts
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Ahh, this drove me nuts!
My linux-fu wasn't strong enough, so I just changed over to Linux Mint (~Ubuntu). Too bad, as I did like OpenSUSE..
My linux-fu wasn't strong enough, so I just changed over to Linux Mint (~Ubuntu). Too bad, as I did like OpenSUSE..
Houdini Lounge » Linux distro / Xeons
- eetu
- 606 posts
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As for distribution, I just went through a few of them and ended up with Linux Mint. I think it's essentially Ubuntu without the new Gnome3, which I found a little bit too adventurous for my taste..
Houdini Lounge » Render out vector fields for visualization?
- eetu
- 606 posts
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Check out these renderings by vmuriel, http://www.vmuriel.com/post_streamers.html [vmuriel.com]
Houdini Indie and Apprentice » Receive but don't cast shadows
- eetu
- 606 posts
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adrianlazar
Many thanks James, yep works for my scene but still, looks like it could get complicated if you have a scene with many objects.
Have you tried the Light Linker pane?
eetu.
Technical Discussion » Split Voxel islands
- eetu
- 606 posts
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dulo
I want to split all connected voxel blobs into seperate volumes.
I thought about converting to isosurface, split into not connected groups and revoxel the split surfaces but the result its not “voxelperfect”. Is there a way to stay in volume and process the volume to find the islands ?
Maybe take your re-voxelized isosurface, clamp all non-zero voxels to 1, and then use that as a mask to copy voxel values from the original volume?
eetu.
Technical Discussion » hqueue won't start
- eetu
- 606 posts
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Maybe:
The HQueue Server requires Python 2.5. Please make sure it is installed before running the installer. [sidefx.com]
(you seem to have 2.6)
The HQueue Server requires Python 2.5. Please make sure it is installed before running the installer. [sidefx.com]
(you seem to have 2.6)
Houdini Indie and Apprentice » [solved] create points based on csv file using python
- eetu
- 606 posts
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zarti
you may give a try to Table Import SOP .
Oh my, I had totally missed that one, good to know!
oat: .geo is the ascii/text version of Houdini's own geometry format. Usually the binary version, .bgeo, is the one used.
Houdini Indie and Apprentice » [solved] create points based on csv file using python
- eetu
- 606 posts
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Just to add another option - you could do a little bit of reformatting to make it a .geo file.
A .geo file looks like this
You'll need to add the header and do a little of massaging to each line, but in some cases that might be an easier route to take.
The header should be quite easy to decipher. The attribute definition line is
The full geo file definition is at e.g. $HFS/hfs11.0.805/houdini/public/GPD/GPD.txt
A .geo file looks like this
PGEOMETRY V5
NPoints 8 NPrims 6
NPointGroups 0 NPrimGroups 0
NPointAttrib 2 NVertexAttrib 0 NPrimAttrib 0 NAttrib 0
PointAttrib
Alpha 1 float 1
radiusf 1 float 1
-0.5 -0.5 -0.5 1 (1 1.94000006)
0.5 -0.5 -0.5 1 (1 1.94000006)
You'll need to add the header and do a little of massaging to each line, but in some cases that might be an easier route to take.
The header should be quite easy to decipher. The attribute definition line is
The full geo file definition is at e.g. $HFS/hfs11.0.805/houdini/public/GPD/GPD.txt
Technical Discussion » Stereoscopy: RealD3-D Lessons
- eetu
- 606 posts
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We have an Acer H5360 DLP projector for presentation use. It does 120Hz and works nicely with e.g. the Nvidia shutter glasses. The price was about 700 euros, so probably about the same in dollars. Cheap. 720p only, though.
eetu.
eetu.
Technical Discussion » How to speed up render for millions of Particles?
- eetu
- 606 posts
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One more idea might be to render your wedged particle passes separately into deep camera maps - that way you should be able to properly composite the whole bunch together afterwards.
(Never tried it, though..)
eetu.
(Never tried it, though..)
eetu.
Technical Discussion » solaris nebula effect
- eetu
- 606 posts
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As a variation on the theme, i once tried rendering some flame fractal images and then stacked them to form a volume: http://forums.odforce.net/index.php?/topic/8471-eetus-lab/page__view__findpost__p__56247 [forums.odforce.net]
eetu.
eetu.
Technical Discussion » SSS flickering
- eetu
- 606 posts
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I had this problem once, changing from to micropoly to raytrace rendering engine fixed it.
eetu.
eetu.
Technical Discussion » Volume attributes & volume vop
- eetu
- 606 posts
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You need to have a string attribute with the name “name” and a value of the desired name.. clear as mud!
eetu.
eetu.
Technical Discussion » VOP POPs ramp problem
- eetu
- 606 posts
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Looks like the particles that are added to grpA retain their earlier group assignment as well, and thus try to follow 2 leaders at the same time..
eetu.
eetu.
Technical Discussion » delayed load with pscale
- eetu
- 606 posts
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Thinking further; having a hierarchical method of setting attributes should be cheaper file/io/memory-wise too, as they would not need to be defined for each point/prim..
eetu.
eetu.
Technical Discussion » delayed load with pscale
- eetu
- 606 posts
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I've been wondering about the same exact thing.
Looking at the ifd commands, I think an attribute override would fit in there nicely
eetu.
Looking at the ifd commands, I think an attribute override would fit in there nicely
eetu.
Houdini Lounge » eflection antialiasing
- eetu
- 606 posts
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http://forums.odforce.net/index.php?/topic/10165-reflection-antialiasing/ [forums.odforce.net]
(I do think it is a bit impolite to crosspost on both forums, feels like potential waste of other peoples' time)
eetu.
(I do think it is a bit impolite to crosspost on both forums, feels like potential waste of other peoples' time)
eetu.
Technical Discussion » rf import-export digital assets
- eetu
- 606 posts
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The official i/o plugins from Next Limit are here, http://realflow.com/plugins.htm [realflow.com]
eetu.
eetu.
Technical Discussion » Hacking IFDs
- eetu
- 606 posts
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mrXSI
is it at all possible to manipulate the IFDs to insert archives or create references to other archives on disk
Yep, the “source” command behaves like #include.
“source fragment.ifd” (without the quotation marks) inserts the contents of fragment.ifd into the master .ifd
For some reason the ifd format help page does not mention this. http://www.sidefx.com/docs/houdini10.0/rendering/ifd [sidefx.com]
eetu.
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