Thank you, but not quite what im after. Hopefully the attached images explains it better
I want to select all the red faces (manual selection here) and then use rest for sourcing smoke
-kimmo
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Houdini Indie and Apprentice » Q about selecting faces with Ray SOP
- KiLa
- 109 posts
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Houdini Indie and Apprentice » Q about selecting faces with Ray SOP
- KiLa
- 109 posts
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Hi,
is there a way to select faces that are pointing specific direction/object?
I'm trying to create Bullet sim and then emit some smoke from the exploding chunks. Now, i forget to add inside groups in Voronoi Fracture, and instead of enabling it and resimming and writing the geo into disk, i decided to use the geo that i have and educate myself and hopefully learn something new and find a way to select the inside faces other way.
I tried to use the Ray SOP, and then use some attributes and transfer them, but it doesn't seem to work quite as well i hoped…or i'm not using it correctly: it seems to select a bit more than i need.
Any ideas how to select only the polys that are facing the grid? Using Ray SOP or something else.
Cheers
-kimmo
is there a way to select faces that are pointing specific direction/object?
I'm trying to create Bullet sim and then emit some smoke from the exploding chunks. Now, i forget to add inside groups in Voronoi Fracture, and instead of enabling it and resimming and writing the geo into disk, i decided to use the geo that i have and educate myself and hopefully learn something new and find a way to select the inside faces other way.
I tried to use the Ray SOP, and then use some attributes and transfer them, but it doesn't seem to work quite as well i hoped…or i'm not using it correctly: it seems to select a bit more than i need.
Any ideas how to select only the polys that are facing the grid? Using Ray SOP or something else.
Cheers
-kimmo
Houdini Indie and Apprentice » Q about rotating boxes
- KiLa
- 109 posts
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Houdini Indie and Apprentice » Q about rotating boxes
- KiLa
- 109 posts
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Hi, im trying to create a circle of boxes that points to center of the circle.
I am using Copy SOP with ‘Transform using Template Point Attributes’ option ON.
I am calculating the point normals, for the circle, in Attribute VOP, by subtracting point position from constant (0, 0, 0(
My question is: why are the boxes rotating?
-Kimmo
I am using Copy SOP with ‘Transform using Template Point Attributes’ option ON.
I am calculating the point normals, for the circle, in Attribute VOP, by subtracting point position from constant (0, 0, 0(
My question is: why are the boxes rotating?
-Kimmo
Houdini Indie and Apprentice » VEX error when using Point cloud open in SHOP
- KiLa
- 109 posts
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Hi, i am trying to read particles, from a bgeo sequence, into material, and i get the following error when trying rendering:
mantra: VEX error - pcopen() requires a constant argument for the ‘preload’ keyword argument
Trying to create smoke sime where the color comes from the particles.
Im using the following path for the point cloud texture: $HIP/cache/particles_$F4.bgeo
Any ideas? Using Houdini 14.0.275
mantra: VEX error - pcopen() requires a constant argument for the ‘preload’ keyword argument
Trying to create smoke sime where the color comes from the particles.
Im using the following path for the point cloud texture: $HIP/cache/particles_$F4.bgeo
Any ideas? Using Houdini 14.0.275
Houdini Indie and Apprentice » Q about the Soft Dots VEX node
- KiLa
- 109 posts
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Houdini Indie and Apprentice » Q about the Soft Dots VEX node
- KiLa
- 109 posts
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Houdini Indie and Apprentice » Q about the Soft Dots VEX node
- KiLa
- 109 posts
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Thanks for the reply pusat.
It doesn't seem to do anything, not even in your file.
Now, i assume that if reduce the blur into 0, the edge between the white, the “mask” that Soft Dots will create, and the black color, should be straight, without any blur, and if i set it to high value, there should be a gradient from the center of the dot, to its “border”
And, yes, if your are creating “real” material, you need the surface model, but in my case i was just testing, and thats why the soft dots was connected directly to Cf.
-k
PS: here is two screenshot from my system, one with the low blur and one with the high value
It doesn't seem to do anything, not even in your file.
Now, i assume that if reduce the blur into 0, the edge between the white, the “mask” that Soft Dots will create, and the black color, should be straight, without any blur, and if i set it to high value, there should be a gradient from the center of the dot, to its “border”
And, yes, if your are creating “real” material, you need the surface model, but in my case i was just testing, and thats why the soft dots was connected directly to Cf.
-k
PS: here is two screenshot from my system, one with the low blur and one with the high value
Houdini Indie and Apprentice » Q about the Soft Dots VEX node
- KiLa
- 109 posts
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Hi!
What does the ‘Blur’ parameter do in Soft Dots VEX node? It doesn't seem to do anything.
Tested in H14.0.203.13 and H13.0.447
Attached file was made in H14
Cheers
-k
What does the ‘Blur’ parameter do in Soft Dots VEX node? It doesn't seem to do anything.
Tested in H14.0.203.13 and H13.0.447
Attached file was made in H14
Cheers
-k
Houdini Indie and Apprentice » Q about ROP Output Driver and fractured geometry
- KiLa
- 109 posts
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Hi!
Im trying to create helper otl for caching: it would be nice to lay down a single node, press a button to write incoming geo/data into disk and then the node would use file to read it in.
Some kind of “IO Bake”
-k
Im trying to create helper otl for caching: it would be nice to lay down a single node, press a button to write incoming geo/data into disk and then the node would use file to read it in.
Some kind of “IO Bake”
-k
Houdini Indie and Apprentice » Q about ROP Output Driver and fractured geometry
- KiLa
- 109 posts
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Hi!
Can i use ROP Output Driver to write fractured geometry into disk?
In the attached file, im trying to do that but for some reason the fractures are lost during write.
If i do it using File SOP / write and read - it works without problems.
Cheers
-k
PS: Happy New Year!
Can i use ROP Output Driver to write fractured geometry into disk?
In the attached file, im trying to do that but for some reason the fractures are lost during write.
If i do it using File SOP / write and read - it works without problems.
Cheers
-k
PS: Happy New Year!
Houdini Indie and Apprentice » Fracturing advice for destruction
- KiLa
- 109 posts
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Houdini Indie and Apprentice » Q about hard constraint and condof and condir
- KiLa
- 109 posts
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Hi!
How does the constraint_type, condof and condir attributes work?
Im trying to create a hinge using hard constraint…so im setting the constraint type to all (to block the falling and to control the rotation), condof to 2 (to restrict the rotation to only 1 axis) and condir to 0 1 0… and my ‘door’ is falling.
Do i have to use two constrains? One to stop the falling, and another to control the rotation?
Attached file contains the scene.
Cheers
-k
How does the constraint_type, condof and condir attributes work?
Im trying to create a hinge using hard constraint…so im setting the constraint type to all (to block the falling and to control the rotation), condof to 2 (to restrict the rotation to only 1 axis) and condir to 0 1 0… and my ‘door’ is falling.
Do i have to use two constrains? One to stop the falling, and another to control the rotation?
Attached file contains the scene.
Cheers
-k
Houdini Indie and Apprentice » Calculating reflecting vector
- KiLa
- 109 posts
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Houdini Indie and Apprentice » Calculating reflecting vector
- KiLa
- 109 posts
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Noob here again
How can i calculate reflecting vector in VOP SOP? I have googled it and i found sites with formulas…one of them was this (pure formula/math only):
http://ogldev.atspace.co.uk/www/tutorial19/tutorial19.html [ogldev.atspace.co.uk]
But it does not seem to work when i try to implement it in Houdini: maybe i don't understand the formula, or maybe i lay the nodes in invalid order.
I don't want to use single node, if there is such - i want to understand how its done, and then i can use the one node approach
Attached file contains a demo scene where i have tried to implement the formula. The plan, in the file, is that i can move to point and normal, and H will automatically calc a reflecting vector, and display it
How can i calculate reflecting vector in VOP SOP? I have googled it and i found sites with formulas…one of them was this (pure formula/math only):
http://ogldev.atspace.co.uk/www/tutorial19/tutorial19.html [ogldev.atspace.co.uk]
But it does not seem to work when i try to implement it in Houdini: maybe i don't understand the formula, or maybe i lay the nodes in invalid order.
I don't want to use single node, if there is such - i want to understand how its done, and then i can use the one node approach
Attached file contains a demo scene where i have tried to implement the formula. The plan, in the file, is that i can move to point and normal, and H will automatically calc a reflecting vector, and display it
Houdini Indie and Apprentice » Q about viewport rotation
- KiLa
- 109 posts
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Houdini Indie and Apprentice » Q about viewport rotation
- KiLa
- 109 posts
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Hi,
is there a way to rotate the viewport around selected object..node?
Lets say that ur inside DOP network and your RBD object is up in the air, and you would like to rotate your viewport around it. If i press down space + LMB, the viewport is rotating around the entire scene..i think
Cheers!
is there a way to rotate the viewport around selected object..node?
Lets say that ur inside DOP network and your RBD object is up in the air, and you would like to rotate your viewport around it. If i press down space + LMB, the viewport is rotating around the entire scene..i think
Cheers!
Houdini Learning Materials » Procedural Cracking Tool Tutorial
- KiLa
- 109 posts
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Houdini Indie and Apprentice » Rendering object mask (Op_Id) pass/plane in Houdini 12
- KiLa
- 109 posts
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Thanks Joker386!
The custom attribute, ‘JKID’, thats clear, but it can get a bit tedious if you have many items on which you want to attach the attribute.
But the oppwd thingy..where would i put that code? In the same place where i/you now manually assign the ‘JKID’?
The custom attribute, ‘JKID’, thats clear, but it can get a bit tedious if you have many items on which you want to attach the attribute.
But the oppwd thingy..where would i put that code? In the same place where i/you now manually assign the ‘JKID’?
Houdini Indie and Apprentice » Rendering object mask (Op_Id) pass/plane in Houdini 12
- KiLa
- 109 posts
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Is there a way to create the Op_Id's automatically so that they start from 1?
I have to investigate about the custom attribute…not exactly sure how to implement that
I have to investigate about the custom attribute…not exactly sure how to implement that
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