Yes, that is how it is supposed to work. The extrusion is in a local relative space. The absolute position and orientation of the curve is irrelevant.
For more direct control by the curve on the output, a sweep operation is more applicable.
Found 1200 posts.
Search results Show results as topic list.
Technical Discussion » Extrude does not follow the curve
-
- jsmack
- 1925 posts
- Offline
Technical Discussion » Python SOP: Code field size
-
- jsmack
- 1925 posts
- Offline
Technical Discussion » I need halp for "Show Groups" panel ...
-
- jsmack
- 1925 posts
- Offline
That's the node group editor, it used to be toggled with the ‘X’ key, but now it's shift-Z.
It's completely undocumented, but it's fairly simple. You can create a ‘group’ from selected nodes. And then you can hide that group of nodes, or unhide it. Different contexts expose other actions. For objects you can toggle display flags, sops you can toggle template/bypass flags. For any context, you an reselect the group, and the nodes in the group will be selected again. The reverse is also possible.
It's completely undocumented, but it's fairly simple. You can create a ‘group’ from selected nodes. And then you can hide that group of nodes, or unhide it. Different contexts expose other actions. For objects you can toggle display flags, sops you can toggle template/bypass flags. For any context, you an reselect the group, and the nodes in the group will be selected again. The reverse is also possible.
Houdini Indie and Apprentice » Weird, curved shadow cast by straight line on straight face
-
- jsmack
- 1925 posts
- Offline
Technical Discussion » Extrude does not follow the curve
-
- jsmack
- 1925 posts
- Offline
It doesn't work that way. Extrusion is in a local space, the curve's z axis is used for the extrusion in the face's normal direction. Curve displacements in x and y are in the local tangent space of the extruded elements.
Try drawing your curve starting from the origin and tangent to the z axis before deviating.
Try drawing your curve starting from the origin and tangent to the z axis before deviating.
Houdini Learning Materials » Material Shader Builder Presets
-
- jsmack
- 1925 posts
- Offline
Yes there are still presets, however the one in the video no longer exists as a preset for the material builder. It was converted to a separate material HDA called “classic shader,” available in a matnet such as /mat. Old shop-based materials are deprecated, and no longer featured in the material preset palette.
Houdini Indie and Apprentice » Ray sop projects on ground plane (should not)
-
- jsmack
- 1925 posts
- Offline
The ray sop doesn't use a ground plane unless you provide one. Might the terrain be at zero in some places?
Houdini Indie and Apprentice » No OpenCL platform has the specified device type !!HELP!!
-
- jsmack
- 1925 posts
- Offline
This has been fixed for a while now, no?
Houdini 17.0.416 Updated the OpenCL ICD loader to work with the latest NVIDIA drivers, so that NVIDIA GPUs will again be usable as OpenCL devices within Houdini. Wed. November 28, 2018
Technical Discussion » [python] link colorramp together
-
- jsmack
- 1925 posts
- Offline
check out pyro2.py
from pyro2 import xferLinkParm xferLinkParm(sourceparm, destparm, relpath=False) [code]
Technical Discussion » Retime breaks on flip tank
-
- jsmack
- 1925 posts
- Offline
I don't think flip creates id's by default. Reseeding or sourcing in the simulation will cause the point numbers to change from frame to frame, so the retime will need an id attribute to identify which points moved where. I think there's an option to turn on id creation on the flip solver or object.
http://www.sidefx.com/docs/houdini/nodes/dop/flipsolver.html#behavior [www.sidefx.com]
http://www.sidefx.com/docs/houdini/nodes/dop/flipsolver.html#behavior [www.sidefx.com]
Technical Discussion » Keyframing Pyro timeScale to speed up runup
-
- jsmack
- 1925 posts
- Offline
I haven't used the new retime mode for volumes yet, but in the past when building my own advection based volume retime tool I had to add a blur that modulates in time with the sampling of integer frames to eliminate flicker. Finding out the amount of blur needed took some trial and error.
Technical Discussion » Problem with a render
-
- jsmack
- 1925 posts
- Offline
The image viewer application can export an image sequence as an AVI on windows. On MacOS and Linux there are other options. I generally use ffmpeg on the command line to convert to an mp4, but I admit it's argument syntax is a bit arcane and makes this process a bit of a chore. At least it's free.
Technical Discussion » foreach connected breakout to own geo
-
- jsmack
- 1925 posts
- Offline
You don't need the for each. The object merge allows groups to be used to merge a part of an object. For example, your connectivity node creates an integer attribute, named ‘class’ by default. In your geo container that is parented to the composite geo, create an object merge with the expressions:
objpath1: `opinputpath('..',0)+'/OUT'`
group1: @class=`opdigits('..')`
xformtype: None
Then you can copy and paste the geo node for each island you want to break out, or use python to create the nodes based on the class attribute's number of unique values. Name the nodes with a number at the end, “part0”, “part1”, “part2”, etc for the opdigits expression to work correctly. Or if using python to create the nodes, fill in the actual value instead of the digits expression.
That's how I've done this in the past.
objpath1: `opinputpath('..',0)+'/OUT'`
group1: @class=`opdigits('..')`
xformtype: None
Then you can copy and paste the geo node for each island you want to break out, or use python to create the nodes based on the class attribute's number of unique values. Name the nodes with a number at the end, “part0”, “part1”, “part2”, etc for the opdigits expression to work correctly. Or if using python to create the nodes, fill in the actual value instead of the digits expression.
That's how I've done this in the past.
Technical Discussion » instance sequence stutter
-
- jsmack
- 1925 posts
- Offline
AndyW
I'm not familiar with age stratification, I assumed you meant life variance or jitter birth time, both of which were turned off in my set up
Yes, I meant jitter birth time. I forget the specific name. Glad you got it working though.
Technical Discussion » instance sequence stutter
-
- jsmack
- 1925 posts
- Offline
sounds like you need to do rint() instead. If age stratification was enabled in pop source, then the ages would have some partial time increment added to them at birth, and you would never have any ages so close to the multiple of the time increment that float precision comes into play.
int frame = (int)rint(@age * 24.0); s@path = sprintf("/foogeo.%04d.bgeo", frame);
Technical Discussion » $RFSTART and $RFEND no longer work in H17?
-
- jsmack
- 1925 posts
- Offline
Hey, I tried setting the play back range with the widget and got the same result you did(doesn't update). I've always typed in the numbers when working a project so it didn't come up for me. I can submit a bug if you don't want to.
Looks like the bug was introduced after release. It is not present in build 352, but is in 416(the current production build).
Looks like the bug was introduced after release. It is not present in build 352, but is in 416(the current production build).
Edited by jsmack - Dec. 6, 2018 02:45:35
Technical Discussion » $RFSTART and $RFEND no longer work in H17?
-
- jsmack
- 1925 posts
- Offline
I've been using RFSTART/END in 17 without issue.
I remember seeing that happen back in the day when setting the play bar range with a script. Are you setting the play bar range manually, or with a script? If the latter you might need to call ‘varchange’.
I remember seeing that happen back in the day when setting the play bar range with a script. Are you setting the play bar range manually, or with a script? If the latter you might need to call ‘varchange’.
Edited by jsmack - Dec. 6, 2018 02:02:52
Houdini Indie and Apprentice » select randomly from 3 (or more) colors linearly (efficiently)
-
- jsmack
- 1925 posts
- Offline
nah dude, ramps take forever, use sample_discrete()
http://www.sidefx.com/docs/houdini/vex/functions/sample_discrete.html [www.sidefx.com]
Attribute randomize has a discrete mode too. Just put in the values, (and the weights for each if desired).
http://www.sidefx.com/docs/houdini/vex/functions/sample_discrete.html [www.sidefx.com]
Attribute randomize has a discrete mode too. Just put in the values, (and the weights for each if desired).
Technical Discussion » Volumetric Lights and the Atmosphere Node
-
- jsmack
- 1925 posts
- Offline
I've never heard of ‘foglight’ but there is ‘litfog’ atmostphere shader.
Typically I would do this effect with an actual volume, such as a volume grid parented to the camera, or placed in the scene. Working with atmosphere shaders is a pain, and they don't appear in indirect bounces. They also cause problems if your scene contains transparent features.
Typically I would do this effect with an actual volume, such as a volume grid parented to the camera, or placed in the scene. Working with atmosphere shaders is a pain, and they don't appear in indirect bounces. They also cause problems if your scene contains transparent features.
Houdini Lounge » real volume motion blur?
-
- jsmack
- 1925 posts
- Offline
In theory, yes.
http://jcgt.org/published/0005/01/01/paper-lowres.pdf [jcgt.org]
Built in to Houdini, no.
http://jcgt.org/published/0005/01/01/paper-lowres.pdf [jcgt.org]
Built in to Houdini, no.
-
- Quick Links