Found 147 posts.
Search results Show results as topic list.
Technical Discussion » Inter-Particle Shadows
- sascha
- 158 posts
- Offline
Technical Discussion » Pixel Parser
- sascha
- 158 posts
- Offline
I need VEX shader which parses a bitmap texture pixel by pixel to asign a different pixel color value to each particle id. Or can I get the same effect with a bitmap input through another method?
Technical Discussion » Push Operator
- sascha
- 158 posts
- Offline
mark
Or, in VEX (which I think is something like 3 or 4 VOPs…)
Would VEX not be much slower in the viewport as a SOP?
Technical Discussion » POP Disk Cache
- sascha
- 158 posts
- Offline
craig
You can't, directly. But you can fake it using DOPs. The attached shows how. The only thing in the DOPs network that is not at the default is the location of the particle system. Then you play out (compute) the DOPs simulation, and it is cached up for you in RAM, and you can scrub it back and forth.
What about a cache on the hard disk?
Technical Discussion » Push Operator
- sascha
- 158 posts
- Offline
How can I translate every vertex of a polygon along the normal direction about a certain amount.
Technical Discussion » Particles with motion blur?
- sascha
- 158 posts
- Offline
Thanks, the Velocity Attribute Blur does work.
By the way what does this warning mean?
Warning: topology for /obj/particles: and /obj/particles: doesn't match - no deformation blur will occur
By the way what does this warning mean?
Warning: topology for /obj/particles: and /obj/particles: doesn't match - no deformation blur will occur
Technical Discussion » Align a pivot to a face
- sascha
- 158 posts
- Offline
jesta
does it really matter that the pivot isn't centred on the face if it essentially does what it is supposed to?
It's a matter of aesthetics over function.
It does matter. Not for translation but for rotation. It's a difference if the center for the rotation handle is on a boundary vertex or in the center of gravity for example.
Edited by - Aug. 17, 2006 13:54:37
Technical Discussion » Particles with motion blur?
- sascha
- 158 posts
- Offline
How can I render particles with motion blur? Render type is set to sphere and the motion blur is set to deformation blur. No matter how high I set the particle blur in der render POP I get no motion blur.
Technical Discussion » Particles flowing through a tube
- sascha
- 158 posts
- Offline
Unfortunately the creep OP on the SOP level does not work for me because after simulating the particles some time through a tube I want them to fall on an animated surface. :?:
PS: I found also the tutorial at the end of the post: http://www.sidefx.com/index.php?option=com_forum&Itemid=172&page=viewtopic&t=2283 [sidefx.com]
PS: I found also the tutorial at the end of the post: http://www.sidefx.com/index.php?option=com_forum&Itemid=172&page=viewtopic&t=2283 [sidefx.com]
Technical Discussion » Particles flowing through a tube
- sascha
- 158 posts
- Offline
I'm trying to simulate particles flying through a tube. At the moment I'm using follow POPs with some leaders. Unfortunately the result does not deliver what I need because the particles are crossing each other flying from leader to leader. Is there a more simple way to send particles through a tube? I don't need collision between the particles and the tube; the particles shall just follow the tube.
Technical Discussion » Where is the pivot orientation?
- sascha
- 158 posts
- Offline
Wolfwood
Nope. A pivot is just defines a point in space. If you are Transforming some object/geo you can hit “Insert” to adjust the pivot.
Like you do it in Maya or XSI. The only difference is the other applications have a rotation for the pivot or center.
Technical Discussion » Aligning Rotation
- sascha
- 158 posts
- Offline
Wolfwood
I'm not sure what you are trying to do. Are you trying to model an object and want to align the handle in different ways to make pushing/pulling points easier? Or are you working with Objects and trying to create a rig with specific spaces and orientations?
Yep, I want to align the edit SOP handle for example.
Technical Discussion » Creating Constraints
- sascha
- 158 posts
- Offline
Wolfwood
If you want to deform a set of points using objects in world space then that sounds like a job for Bones/Meta-balls. You should also investigate the Lattice SOP.
I don't want to deform a set of components. I want to align (constrain) an object to a set of components.
Technical Discussion » Creating Constraints
- sascha
- 158 posts
- Offline
Wolfwood
Trying to find direct conversions from a Maya workflow to a Houdini workflow will lead to nothing but headaches. Instead of asking really specfic questions like the one above, try to be a bit more general and explain what you are trying to do. A lot of us here don't have any Maya experience, which means we don't know what a point or orient constraint do.
Okay, I need to pipe the orientation of a cluster of components (one or more vertices, edges, faces or CVs) in world space into the orientation of another object.
Technical Discussion » Aligning Rotation
- sascha
- 158 posts
- Offline
Wolfwood
As stated in your other thread,Simon
Detach the handle, then right click on it and use start orientation picking - then pick 3 points.
I see it's not so easy coming from XSI and Maya.
The problem is if I pick the CVs the position does also snap to a new location. I just want to align the rotation.
Also I want to pick vertices from the lattice itself which does not work.
Technical Discussion » Aligning Rotation
- sascha
- 158 posts
- Offline
Technical Discussion » Where is the pivot orientation?
- sascha
- 158 posts
- Offline
Does the pivot have an orientation in Houdini?
Houdini 8.1 documentation:
Edit an object's origin/pivot:
To…
Set an object's pivot point in the viewport
Do this
TBD.
Technical Discussion » Creating Constraints
- sascha
- 158 posts
- Offline
Technical Discussion » Curve Extraction
- sascha
- 158 posts
- Offline
Simon
Use the ends sop. Might be better to do it before though.
Also, try adding a basis sop after the convert and making the knots uniform
Thanks, that works fine.
Technical Discussion » Align a pivot to a face
- sascha
- 158 posts
- Offline
Both methods are working but after performing them the pivot doesn't stay at the centroid where it was before. Can I bring it back? Or can I just snap or orient the rotation?
-
- Quick Links