edit: deleted
this was kind of doublepost because of some problems in the forum and missing posts
Found 5852 posts.
Search results Show results as topic list.
Houdini Indie and Apprentice » SOP vector field node
-
- tamte
- 9111 posts
- Offline
Houdini Indie and Apprentice » Environments, refl/refract and alphas
-
- tamte
- 9111 posts
- Offline
i am usually using big sphere around the scene with constant shader, either with rat or hdri map, it can be sequence of course
the sphere is set as phantom so it is visible only for secondary rays
the sphere is set as phantom so it is visible only for secondary rays
Houdini Indie and Apprentice » SOP vector field node
-
- tamte
- 9111 posts
- Offline
then i suggest you to look at ChoreographedBreakup Example from help examples.
the technique used there can be used with active value or other (per object) parameters. But for your needs that example should be what you want
the technique used there can be used with active value or other (per object) parameters. But for your needs that example should be what you want
Technical Discussion » With force,how to make particle move uniform circularly?
-
- tamte
- 9111 posts
- Offline
The initial force you applied is 4 in global X direction
then you are just adding incentric force, i cannot see the reason why it should be circular this way
Try using Orbit POP, it is made for this kind of motion
or you can make your own force with VOP POP
then you are just adding incentric force, i cannot see the reason why it should be circular this way
Try using Orbit POP, it is made for this kind of motion
or you can make your own force with VOP POP
Houdini Indie and Apprentice » SOP vector field node
-
- tamte
- 9111 posts
- Offline
you do not need sop vector field as a mask, Sop scalar field is ok. You do not have 3 volume primitives in your geometry anyways
but to your problem
see first attached file
for simplier solution you can animate activness of the second box by adding Active Value DOP and animating active parameter
see second file
but to your problem
see first attached file
for simplier solution you can animate activness of the second box by adding Active Value DOP and animating active parameter
see second file
Technical Discussion » wire constraint weight
-
- tamte
- 9111 posts
- Offline
Technical Discussion » MAKING wire / chain ?
-
- tamte
- 9111 posts
- Offline
here are some links that can be helpful
http://www.sidefx.com/index.php?option=com_content&task=view&id=1242&Itemid=132 [sidefx.com]
http://www.sidefx.com/index.php?option=com_content&task=view&id=1399&Itemid=132 [sidefx.com]
http://www.sidefx.com/index.php?option=com_content&task=view&id=1400&Itemid=132 [sidefx.com]
http://www.sidefx.com/index.php?option=com_content&task=view&id=1242&Itemid=132 [sidefx.com]
http://www.sidefx.com/index.php?option=com_content&task=view&id=1399&Itemid=132 [sidefx.com]
http://www.sidefx.com/index.php?option=com_content&task=view&id=1400&Itemid=132 [sidefx.com]
Technical Discussion » MAKING wire / chain ?
-
- tamte
- 9111 posts
- Offline
the base tool for both is Curve SOP or you can work with any curve in houdini
then to make wire from it you can either sweep circle along it and skin it or use PolyWire SOP or Wireframe SOP
for chain you will probably need Resample SOP and Copy SOP
see attached file as an example
then to make wire from it you can either sweep circle along it and skin it or use PolyWire SOP or Wireframe SOP
for chain you will probably need Resample SOP and Copy SOP
see attached file as an example
Technical Discussion » How to mask vector field by scalar field?
-
- tamte
- 9111 posts
- Offline
I've found Gas Field VOP, it is working now
but i am still curious if it is possible with Gas Calculate
but i am still curious if it is possible with Gas Calculate
Houdini Lounge » EDIT SOP
-
- tamte
- 9111 posts
- Offline
Technical Discussion » how to use geometry as a light source ?
-
- tamte
- 9111 posts
- Offline
i think it is possible with light instancing
either on geo points or scatter new points on surface and instance lights on them
i am not sure about speed however, it can be really slow with many lights, or?
either on geo points or scatter new points on surface and instance lights on them
i am not sure about speed however, it can be really slow with many lights, or?
Technical Discussion » How to mask vector field by scalar field?
-
- tamte
- 9111 posts
- Offline
Hi, I am doing smoke simulation with one custom vector field Cd to colorize my smoke and I want to mask it by density field
i have tried Gas Calculate with Cd as dest field and density as source, calculation method set to Multiply but it is obviously not working. Maybe because Cd is vector and density is scalar (because the same setup works when i use vel as source, but of course with wrong results)
is there any way to make it work?
i have tried Gas Calculate with Cd as dest field and density as source, calculation method set to Multiply but it is obviously not working. Maybe because Cd is vector and density is scalar (because the same setup works when i use vel as source, but of course with wrong results)
is there any way to make it work?
Houdini Indie and Apprentice » Particle point instance attribute control
-
- tamte
- 9111 posts
- Offline
you still have control over displacement per instance
so if you can do your geometry modification through displacement shader, you can use instances
so if you can do your geometry modification through displacement shader, you can use instances
Houdini Indie and Apprentice » Particle point instance attribute control
-
- tamte
- 9111 posts
- Offline
since you are after geometric change on each instance, it would not be true instance anymore, because mantra has to keep all modified geometry in memory
you can append copy sop after the pop network for that kind of thing
read this for more info
http://www.sidefx.com/docs/houdini10.0/copy/instancing [sidefx.com]
http://www.sidefx.com/docs/houdini10.0/copy/varying [sidefx.com]
you can append copy sop after the pop network for that kind of thing
read this for more info
http://www.sidefx.com/docs/houdini10.0/copy/instancing [sidefx.com]
http://www.sidefx.com/docs/houdini10.0/copy/varying [sidefx.com]
Technical Discussion » Houdini is becoming slow very fast (ATI)
-
- tamte
- 9111 posts
- Offline
Houdini Indie and Apprentice » Rotate particle Instance
-
- tamte
- 9111 posts
- Offline
mzigaib
…
I tried rotation pop but it doesn't give me control over the angle and axis separately
…
how do you imagine separate control over angle and axis?
i think they are separated enough in rotation pop
you can allways use vop pop for your custom rotations
Technical Discussion » vops and Rand ID
-
- tamte
- 9111 posts
- Offline
it is random so it is natural to get repeated values
you have 100 points and each one has random int number 1-100
you cannot expect each to have different number
just change your attribute to float and you will see that they are different before rounding to int
you can also add parameter to change seed of the random to get different set of numbers
you have 100 points and each one has random int number 1-100
you cannot expect each to have different number
just change your attribute to float and you will see that they are different before rounding to int
you can also add parameter to change seed of the random to get different set of numbers
Houdini Indie and Apprentice » objects as bones
-
- tamte
- 9111 posts
- Offline
Houdini Indie and Apprentice » objects as bones
-
- tamte
- 9111 posts
- Offline
i am not a pro in this field
but as far as i know the capture SOPs use Capture Region to capture the weights (look inside bone object)
you can use Capture region SOP along with your box object and import it to Capture SOP through Extra Regions parameter or Extra Capture Regions input
maybe there is another way to do this
like Capture Metaballs (for particles maybe?), Wire Capture for wires and polymeshes
but as far as i know the capture SOPs use Capture Region to capture the weights (look inside bone object)
you can use Capture region SOP along with your box object and import it to Capture SOP through Extra Regions parameter or Extra Capture Regions input
maybe there is another way to do this
like Capture Metaballs (for particles maybe?), Wire Capture for wires and polymeshes
Technical Discussion » How to control a string menu with a toggle parameter?
-
- tamte
- 9111 posts
- Offline
the string menu is only gui for integer parameter
you can drive it just by typing
ch(“../reversecurve”)
as an expression
(without ` because it is not string)
you can drive it just by typing
ch(“../reversecurve”)
as an expression
(without ` because it is not string)
-
- Quick Links