I tried to use “import Attribute” to get other particle's attribute. Give a integer number to the “point number” input then can get other point attribute.
But there is a problem, for particle the “Point number” is changed every frame. Can I specify the target particle base on a “ID” attribute, not on a Point Number?
If “Import Attribute”can't, any node can? ( just trying “Find att value by index”, but can't understand this node)
Or any idea can get other particle's attribute?
Hope some one can give me a idea, thank you!
iGou
How to get other particle attribute
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- igou
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- laiwayne
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- igou
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Hi Laiwayne, thank your reply.
yes I'm talking about VOP.
I'm wonder how to use ID to get other particle attributes. for example, when I give a integer “1” to Point number input, importAttribute will to find the particle which point number is “1” but I hope it is to find which ID is “1”, not number.
you mean I can hold point index even some particle die(just use ID)?
yes I'm talking about VOP.
I'm wonder how to use ID to get other particle attributes. for example, when I give a integer “1” to Point number input, importAttribute will to find the particle which point number is “1” but I hope it is to find which ID is “1”, not number.
if you only have one particle system and you want your point index remain consistent in VOP, use ID attriubte.sorry I can't understand well.
you mean I can hold point index even some particle die(just use ID)?
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- laiwayne
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- igou
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Hi Laiwayne, I checked your file. but it seen still to find point number not to find ID
I changed your setting LIFE to Cd, so can clearly to see the result.
as you can see in Console, the id:1 has a Cd {0.510}, but {0.510} is not id1's color, it's id'2's color,
because even I give a id value “1” Houdini will go to find which PT value is “1”…Orz
I changed your setting LIFE to Cd, so can clearly to see the result.
as you can see in Console, the id:1 has a Cd {0.510}, but {0.510} is not id1's color, it's id'2's color,
because even I give a id value “1” Houdini will go to find which PT value is “1”…Orz
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- tamte
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- igou
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- tamte
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it doesn't work with POPs for the same reason as pointcloud lookups or other VEX functions that need to sample geometry from outside using op: syntax
there are ways to do that by using POPs in DOP context and therefore having access to geometry from previous frame you can sample with op: context either in pops directly from outside or in SOP solver which operates on the same geometry as POP solver
some posts that may be helpful
http://forums.odforce.net/index.php?/topic/8637-point-cloud-in-pop/#entry67421 [forums.odforce.net]
http://www.sidefx.com/index.php?option=com_forum&Itemid=172&page=viewtopic&p=124741#124741 [sidefx.com]
there are ways to do that by using POPs in DOP context and therefore having access to geometry from previous frame you can sample with op: context either in pops directly from outside or in SOP solver which operates on the same geometry as POP solver
some posts that may be helpful
http://forums.odforce.net/index.php?/topic/8637-point-cloud-in-pop/#entry67421 [forums.odforce.net]
http://www.sidefx.com/index.php?option=com_forum&Itemid=172&page=viewtopic&p=124741#124741 [sidefx.com]
Tomas Slancik
FX Supervisor
Method Studios, NY
FX Supervisor
Method Studios, NY
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