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+--- Thread: numParticles() returns inaccurate result (/thread-4251.html)
numParticles() returns inaccurate result - Alan2024 - 05-10-2024
Hello, I'm new to tyflow. I've read the docs (https://docs.tyflow.com/tyflow_maxscript/) and trying to use maxscript to get particle data.
But when I call $.numParticles(), it won't return a valid result even when I enabled interface.
Please help me, thank you!
My scene setup is in the image.
RE: numParticles() returns inaccurate result - tyFlow - 05-10-2024
Did you call updateParticles first?
RE: numParticles() returns inaccurate result - Alan2024 - 05-10-2024
(05-10-2024, 02:38 AM)tyFlow Wrote: Did you call updateParticles first?
Yes, I did call updateParticles first. As in the post image, the first line is $.updateParticles 15.
I also tried to write those code into a ms script. The result is also the same.
By the way, I can get Id from getAllParticleIDs(), when I have 169 particles, the array is properly filled with (1, 2, 3, ..., 169). But getParticleAge always returns 0, getParticlePosition returns (0, 0, 0) no matter what frame number I gave to updateParticles() function.
I attached my max scene and script run result.
UE4_Max_VAT_Test011.max (Size: 912 KB / Downloads: 108)
here's my test code:
Code:
macroScript TestTools_TyflowTest category:"Test Tools" buttontext:"Test Tools" tooltip:"Test Tools"
(
fn TestRead = (
local tf = $tyFlow002
--local tfSpline = $tfSplines001
tf.updateParticles 15 -- update before read
local numParticles = tf.numParticles()
-- local tms = tf.getAllParticleTMs()
-- show tf -- properties
-- showinterfaces tf -- methods
-- numParticles = 1
format "TestRead: tf: %, numPartciels: %\n" tf numParticles
format "Class tf %\n" (superClassOf tf) -- GeometryClass
--format "Class tfSpline %\n" (superClassOf tfSpline) -- tfSpline Value
--for j in 1 to numParticles do
--(
--local tm = tms[j]
--)
local ids = tf.getAllParticleIDs()
format "tf id array: %\n" ids
for id in ids do
(
format "processing particle id: %\n" id
local age = tf.getParticleAge(id)
local pos = tf.getParticlePosition(id)
format "age: %; pos: %\n" age pos
)
)
TestRead()
)
macros.run "Test Tools" "TestTools_TyflowTest"the result is
RE: numParticles() returns inaccurate result - tyFlow - 05-13-2024
I opened your file, ran the script, and received the correct result. Is there anything else I need to do to reproduce the issue you're seeing? What version of Max are you using?
Attached is the result I see when running your script.
RE: numParticles() returns inaccurate result - Alan2024 - 05-14-2024
(05-13-2024, 06:27 PM)tyFlow Wrote: I opened your file, ran the script, and received the correct result. Is there anything else I need to do to reproduce the issue you're seeing? What version of Max are you using?
Attached is the result I see when running your script.
Thank you for your reply! I was using Max 2021, maybe this is version specific issue? I'll try another max version.
RE: numParticles() returns inaccurate result - tyFlow - 05-14-2024
Thanks, I can reproduce the issue in Max 2021 and will look further into what's causing it.
Edit: so I stepped through my code in Max 2021 and it's returning all the expected/proper values, but for whatever reason they're not being received by MAXScript properly...not idea why, to be honest. I would recommend trying the setup in a newer version of Max for now.
RE: numParticles() returns inaccurate result - Alan2024 - 05-15-2024
(05-14-2024, 01:14 PM)tyFlow Wrote: Thanks, I can reproduce the issue in Max 2021 and will look further into what's causing it.
Edit: so I stepped through my code in Max 2021 and it's returning all the expected/proper values, but for whatever reason they're not being received by MAXScript properly...not idea why, to be honest. I would recommend trying the setup in a newer version of Max for now.
Thank you for confirming the issue! I will use a newer version
Edit: 2024 works fine, thank you!