Maya nParticle only calculates friction/stickness between particles and rigid bodies, not friction is encountered between particles. My guess is the algorithm complexity is too high. Anyway there is two relative easy ways to fake the effect, according to my searching.
想要用一个一包糖粒堆在物体（对又是它..）上的片段，发现Maya的nParticle只计算粒子和Rigid body的摩擦力不计算粒子和粒子间的摩擦力（想来是算法复杂度太高了），所以不管怎么搞最终都会摊成大烧饼，并且还会不停的抽搐.. 查了下大概有两个相对简单的方法
1. hold particles with a invisible rigid body. 2. Use RealFlow, which seems to have much more handy control over particles
I’m not happy with either. 1 is lame. 2 too much trouble, have to get hang of another environment. If I must do scripting, I choose to learn mel.
So the algorithm is:
It’s unlikely to mess with friction as I guessed above. I tried to modify per particle mass to let them stuck in the space. Yea that works but they tend to be headbutted by other particles and flying around.. for science. Later I googled out it’s possible to control force field per particle, with attribute named “Field name”_”option name”. That is to say adding attribute “gravityField1_magnitude” to nParticle2 will grant you control over per particle gravity from the field.
On creation:
[php]
global int $freezeCap=5; //be completely frozen after the cap rounds
global int $gravityPP=500;
global float $dragPP=100;
global float $accelerationTrigger=15; //the speed parameter to trigger ‘I’m free again!", which leads to free droping.
global int $n[100000]; //how many times have the particle been locked
global int $preVel[100000]; //velocity of last frame
global int $locked[100000];
nParticleShape4.dragField1_magnitude=0;
nParticleShape4.gravityField1_magnitude=$gravityPP;
global int $init=1;
if($init==1) {
int $i;
for($i=0;$i<100000;$i++) {
$n[$i]=0;
$locked[$i]=0;
}
$init=0;
}
[/php]
Before dynamics:
[php]
int $id=nParticleShape4.particleId;
float $vel=abs(nParticleShape4.velocity);
//print("nParticleShape2.velocity "+$nParticleShape2.velocity+"\n");
if($vel>$preVel[$id]+$accelerationTrigger) {
$n[$id]=0;
nParticleShape4.dragField1_magnitude=0; //If it’s free again, unlock and erase record
}
else {
$freezeFact=$n[$id]/$freezeCap; //progress bar of locking
if($freezeFact>1)
$freezeFact=1;
$n[$id]+=1;
nParticleShape4.dragField1_magnitude=$freezeFact*$dragPP; //increase drag force depending on locking level
nParticleShape4.gravityField1_magnitude=$gravityPP*(1-$freezeFact)*(1-$freezeFact); //parabola is better according to experiment
nParticleShape4.velocity=<<0,0,0>>;
}
$preVel[$id]=nParticleShape4.velocity;
[/php]
The script is not bad to me.. adjustable parameters are handy. Time efficiency is acceptable (as a former ACMer, I can confirm this is O(n), can’t be better). 20 million particles * 100 frames cost my i7 half an hour. Not perfect but enough for bragging.
1. 弄个透明的动画的rigid body来把粒子圈起来。 2. 用RealFlow，我只用RealFlow模拟水，但是显然那它对粒子的控制比Maya厉害得多。
两个方法我都不高兴，1太不屌爆，2太麻烦，要做很多熟悉另一个环境的工作，且要写脚本，所以不如来学下mel。下了本书叫Maya Python — for Games and Film，翻了一百页发现Python在Maya上基本是庞大的workflow中工程师为了其他人方便写的maya程序，并且也要有mel基础，不是我要的。
总之，思路是：
想要计算摩擦力显然是不现实的，说过了。我先通过改质量的途径让粒子满足条件时失去质量以停在原地不受重力影响，停是能停住但是会被别的particle撞飞.. 非常科学。后来查到可以使用 <力场名>_<属性名> 的方式控制Per Particle的行为，即，给nParticle2添加名为gravityField1_magnitude的attribute程序就会使用它来控制它受到重力场1的magnitude。然后通过DragField让particle稳定。我在注释里详细说。
粒子生成时脚本：
[php]
global int $freezeCap=5; //be completely frozen after the cap rounds
global int $gravityPP=500;
global float $dragPP=100;
global float $accelerationTrigger=15; //the speed parameter to trigger ‘I’m free again!", which leads to free droping.
global int $n[100000]; //how many times have the particle been locked
global int $preVel[100000]; //velocity of last frame
global int $locked[100000];
nParticleShape4.dragField1_magnitude=0;
nParticleShape4.gravityField1_magnitude=$gravityPP;
global int $init=1;
if($init==1) {
int $i;
for($i=0;$i<100000;$i++) {
$n[$i]=0;
$locked[$i]=0;
}
$init=0;
}
[/php]
动态前的脚本：
[php]
int $id=nParticleShape4.particleId;
float $vel=abs(nParticleShape4.velocity);
//print("nParticleShape2.velocity "+$nParticleShape2.velocity+"\n");
if($vel>$preVel[$id]+$accelerationTrigger) {
$n[$id]=0;
nParticleShape4.dragField1_magnitude=0; //If it’s free again, unlock and erase record
}
else {
$freezeFact=$n[$id]/$freezeCap; //progress bar of locking
if($freezeFact>1)
$freezeFact=1;
$n[$id]+=1;
nParticleShape4.dragField1_magnitude=$freezeFact*$dragPP; //increase drag force depending on locking level
nParticleShape4.gravityField1_magnitude=$gravityPP*(1-$freezeFact)*(1-$freezeFact); //parabola is better according to experiment
nParticleShape4.velocity=<<0,0,0>>;
}
$preVel[$id]=nParticleShape4.velocity;
[/php]
个人感觉这个还不错，有很多参数可以控制，效率也还行（前ACMer表示这个就是O(n)..不能再低了），200万粒子100帧i7跑半个小时。显然不完美，蒙人没问题。
Microgaming, pionero en la industria, sigue dominando con clásicos como Mega Moolah (famoso por sus jackpots millonarios) y Immortal Romance.
Play’n GO sobresale con Reactoonz, Book of Dead y Rich Wilde.
В поисках качественных предложений?
Наш магазин вдохновляет интересными новинками.
Начните покупки по ссылке: кракен сайт официальный
I have read a few good stuff here. Definitely value bookmarking for revisiting.
I wonder how much attempt you place to make such a excellent informative
site.
Ꮃrite more, thats all I have to saʏ. Literally, it seems as though you relied on the video to mɑқe y᧐ur point.You definitely knoᴡ
wha youｒe talking about, why waste your intelliɡencе on just posting videos
to your weblog whenn you could be giving us something enliցhtening
to read?
Ⅿy webpage … エトロ ジャケット メンズ (http://007Copy.com//product/b484-1.html)
It’s awesome to pay a visit this site and reading
the views of all friends on the topic of this paragraph,
while I am also eager of getting know-how.
놀라운 퀘스트네요. 그 후에 무슨 일이 있었나요?
감사합니다!
Thankfulness to my father who informed me about this website, this weblog is really
amazing.
I can’t get enough of your website! Your posts are so well-researched, and I love the
clarity in your writing. Have you considered guest posting on other sites to expand your reach?
Keep up the excellent work!
이 블로그는 정보의 보물창고네요! 이 포스트는 특히 흥미롭고 이해하기 쉬웠어요.
the shock from this news에 대해 더 깊이 다룬 시리즈가 있으면 좋겠어요.
멋진 콘텐츠 감사합니다!
Hello, its fastidious piece of writing concerning media print, we all understand media is a enormous source
of data.
I every time spent my half an hour to read this weblog’s articles or reviews every day along with a mug of coffee.
Frree big buut strip teaseFree addult ebony porn moviesSexx offeners dona ana county nmBigg bofther ude secenSwedt piss scennted pussy datihg sitesNudde gjrls thumbnailKiraty alie nude pussyStimilating cliit videoConnescticut digita amaeur repeatersBlzck gitls facee fucking white
guysSexxy boonde girdl picturesFunkly tolwn fuckerTight shemasle
tubeFaat pekple sexAveragge aage irls first sexAvril
suckin cockHoot youmg nuhde teen girlsAnall lesbian xxxLatex povGranny ahal sexx sitesFreee gaay wap downloads
Heere iss myy bloog :: jablex.com
En primer lugar es confirmar que el operador cuente con una licencia válida.
En Argentina, las regiones más serias son CABA con LOTBA, Buenos Aires Provincia con IPLyC, y otras regiones con sus propios institutos.
hello there and thank you for your info – I have certainly picked up
something new from right here. I did however expertise some technical
points using this website, as I experienced to reload the web
site many times previous to I could get it to load properly.
I had been wondering if your web hosting is OK? Not that I am complaining,
but slow loading instances times will often affect your placement in google and can damage your quality score
if advertising and marketing with Adwords. Anyway I am adding this RSS to my email and can look out
for a lot more of your respective interesting content.
Ensure that you update this again very soon.
Świetny materiał. Sporo przydatnych informacji. Pozdrawiam za podzielenie się.
Zapisuję do ulubionych.
Trafnie napisane – sprawa wystroju bywa wymagająca. Przydatne podejście.
Naprawdę inspirujące. Szukałem podobnych porad od dawna.
Super robota!
Here is my website; lbtq8U.Xn–cksr0a.life
Mу brother suggested Ι might like tһіs web site.
He was entirely right. Thіs post actᥙally maɗe my Ԁay.
You can not imagine jut hߋw much time I had spent
for this іnformation! Τhanks!
Review my web-site cbd oil pгice (http://mfb3806h.bget.ru/user/MeridithBandy04/)
Thanks in support of sharing such a fastidious opinion, post
is fastidious, thats why i have read it
fully
Have you ever thought about writing an e-book or guest
authoring on other websites? I have a blog based
upon on the same topics you discuss and would really like to have you
share some stories/information. I know my visitors would appreciate your work.
If you’re even remotely interested, feel free to send me an email.
Great weblog here! Additionally your site lots up very fast!
What web host are you the use of? Can I get your associate link
in your host? I want my site loaded up as fast as yours lol
my web page A片
Sachlicher Inhalt. Jede Menge hilfreiche Hinweise. Danke fürs Teilen. Ab jetzt lese ich hier
öfter mit.
Du hast recht – das Thema der Möbelauswahl kann schwierig.
Danke für die klare Erklärung.
Echt inspirierend. Ich habe schon nach ähnlichen Tipps seit
einiger Zeit gesucht. Klasse gemacht!
Feel free to surf to my web page; Clemmie
This is my first time pay a visit at here and i am genuinely impressed to read all at one place.
Thematic units іn OMT’s curriculum link mathematics to rate օf interests likе modern technology, stiring ᥙρ curiosity аnd drive foｒ leading examination ratings.
Օpen yoᥙr child’s complete capacity in mathematics with OMT Math Tuition’s
expert-led classes, customized tо Singapore’ѕ MOE curriculum
f᧐r primary, secondary, ɑnd JC trainees.
Аѕ mathematics underpins Singapore’ѕ reputation for excellence in international standards ⅼike PISA, math tuition іs key
to unlocking ɑ kid’s prospective and protexting scholastic advantages in tһis core topic.
Tuition highlights heuristic ρroblem-solving ɑpproaches, vital foг taking ⲟn PSLE’s tough w᧐rd problems that need several steps.
Linking math concepts tⲟ real-world situations througһ tuition strengthens understanding, makіng O Level
application-based questions mօre friendly.
Inevitably, junior college math tuition іѕ crucial tо securing
tߋp A Level rеsults, opening doors tⲟ prestigious scholarships and college possibilities.
OMT’ѕ exclusive mathematics program complements MOE criteria ƅʏ stressing theoretical proficiency ⲟver rote learning, Ƅгing about
much deeper long-lasting retention.
Unlimited accessibility tօ worksheets indicates yoս exercise tіll shiok,
improving yօur math self-confidence ɑnd qualities іn no tіme.
Wіth worldwide competition increasing, math tuition settings Singapore pupils аs leading
entertainers іn worldwide mathematics analyses.
Ηere іs my web рage; secondary math tuition centre review
We stumbled over here by a different web address and thought I might as well check things out.
I like what I see so now i am following you. Look forward to going
over your web page repeatedly.
Wartościowy artykuł. Sporo wartościowych informacji.
Dziękuję za ten materiał. Będę zaglądać częściej.
Zgadzam się – kwestia urządzania wnętrz bywa wymagająca.
Wreszcie konkrety.
Szczerze przydatne. Szukałem takich informacji już jakiś czas.
Dziękuję!
Also visit my blog post http://www.Ssoblm.org/
Pretty part of content. I just stumbled upon your web site and in accession capital to say that
I acquire actually loved account your blog posts.
Anyway I’ll be subscribing for your augment
or even I fulfillment you get right of entry to persistently
fast.
Ahaa, its nice conversation concerning this paragraph at this place at this weblog, I
have read all that, so now me also commenting at this place.
Good day! I could have sworn I’ve been to this site before but after browsing through some of the post I
realized it’s new to me. Anyways, I’m definitely
delighted I found it and I’ll be bookmarking and checking back often!
I have been surfing on-line greater than 3 hours today,
but I by no means discovered any fascinating article like yours.
It’s beautiful value enough for me. In my opinion, if all site
owners and bloggers made good content material as you did, the
internet shall be much more helpful than ever before.
Take a look at my page … خرید بک لینک
This is a very informative post about online casinos and betting platforms.
I especially liked how it explains the importance of choosing a
trusted site before signing up.
Many players often ask where they can find reliable gaming platforms with fair odds and smooth payouts.
From what I’ve seen, checking platforms like vn22vip helps users compare features, bonuses, and overall experience.
Thanks for sharing these insights — they’re helpful for both beginners and experienced bettors.
Почему пользователи выбирают площадку
KRAKEN?
Маркетплейс KRAKEN заслужил доверие многочисленной
аудитории благодаря сочетанию ключевых факторов.
Во-первых, это широкий и разнообразный ассортимент,
представленный сотнями продавцов.
Во-вторых, интуитивно понятный интерфейс
KRAKEN, который упрощает навигацию, поиск товаров и управление заказами даже для новых пользователей.
В-третьих, продуманная система безопасных
транзакций, включающая механизмы разрешения
споров (диспутов) и возможность использования условного депонирования, что минимизирует риски для обеих
сторон сделки. На KRAKEN функциональность сочетается с внимательным отношением к безопасности клиентов, что делает процесс покупок более предсказуемым, защищенным и,
как следствие, популярным среди
пользователей, ценящих анонимность и надежность.
I do not know whether it’s just me or if everybody else
experiencing problems with your site. It appears as though some of
the text in your content are running off the screen. Can someone else please
provide feedback and let me know if this is happening to
them as well? This could be a problem with my browser because
I’ve had this happen previously. Thank you
I just couldn’t depart your website before suggesting that I actually loved the usual info an individual provide in your visitors?
Is gonna be again incessantly in order to inspect new posts
What’s Going down i’m new to this, I stumbled upon this I have found It positively helpful and it has helped
me out loads. I’m hoping to give a contribution & help
other customers like its helped me. Good job.
What’s up, its pleasant article concerning media print, we all be familiar with
media is a great source of facts.
Today, I went to the beach with my children. I found a sea shell and gave it
to my 4 year old daughter and said “You can hear the ocean if you put this to your ear.” She put
the shell to her ear and screamed. There was a hermit crab inside and
it pinched her ear. She never wants to go back!
LoL I know this is totally off topic but I had to tell
someone!
Świetny artykuł. Dużo przydatnych porad. Dziękuję za ten materiał.
Polecam innym.
Zgadzam się – sprawa aranżacji potrafi być trudna.
Przydatne podejście.
Bardzo pomocne. Szukałam takich informacji właśnie tego.
Pozdrawiam!
Here is my web blog: Sylvia
торты на заказ Владимир – принимаем
заказы онлайн и по телефону.
ягодный кули в подарок.
работаем с 9 до 21. акция: второй торт
за полцены
капкейки на заказ Владимир – каждый в
своей капсуле. кокос с ананасом.
мастичная фигурка. набор 12 шт – 2700 ₽
торт для мужчины на юбилей – для автомобилиста и программиста.
пиджак с галстуком. темный шоколад.
свеча-бочка с виски
https://tort33.ru/detskie-torty/po-vozrastu/na-8-let/tort-na-8-let-devochke/
Hello! This is my 1st comment here so I just wanted to give a quick shout out and say I truly enjoy
reading through your posts. Can you suggest any other blogs/websites/forums
that deal with the same topics? Thanks!
This is a very informative post about online casinos and betting platforms.
I especially liked how it explains the importance of
choosing a trusted site before signing up.
Many players often ask where they can find reliable gaming platforms with fair odds and smooth payouts.
From what I’ve seen, checking platforms like vn22vip helps users compare features,
bonuses, and overall experience.
Thanks for sharing these insights — they’re helpful for both beginners and experienced bettors.
Whats up are using WordPress for your site platform?
I’m new to the blog world but I’m trying to get started and create my own. Do you require any coding expertise to make your own blog?
Any help would be greatly appreciated!
Hi there! Do you know if they make any plugins to help with Search Engine Optimization? I’m
trying to get my blog to rank for some targeted keywords
but I’m not seeing very good success. If you know of any please share.
Kudos!
Rzeczowy materiał. Mnóstwo wartościowych porad.
Pozdrawiam za podzielenie się. Polecam innym.
Trafnie napisane – temat wystroju potrafi być trudna.
Wreszcie konkrety.
Bardzo inspirujące. Szukałem czegoś takiego już jakiś czas.
Dziękuję!
Stop by my blog post :: sunfall-Game.com
Hi, I do think this is a great web site. I stumbledupon it 😉 I am going to revisit once
again since I saved as a favorite it. Money and freedom is the greatest way to change, may you be
rich and continue to guide other people.
видео [url=https://mailsco.online/]mailsco online[/url] – эффективный тип содержания, заманивающий внимание.
Thanks for finally talking about > Use a simple script to achieve
powder pile | Maya nParticle简单脚本实现粒子堆叠 |
Asher.GG < Loved it!
Just what you need: נערות סוכנות ליווי
Incredible points. Solid arguments. Keep up the amazing effort.
my website :: dr vorobjev
Truly no kyc casinos matter if someone doesn’t be aware of after that its up to
other visitors that they will assist, so here it occurs.
Hello There. I discovered your weblog the use of msn. That is an extremely well written article.
I’ll be sure to bookmark it and come back to
learn more of your useful info. Thanks for the post.
I will certainly return.
Hey there would you mind letting me know which webhost you’re working with?
I’ve loaded your blog in 3 completely different web browsers and I must say this blog loads
a lot faster then most. Can you recommend a good hosting provider at a honest price?
Thank you, I appreciate it!
Bardzo dobry materiał. Mnóstwo praktycznych informacji. Dziękuję za podzielenie się.
Będę zaglądać częściej.
Trafnie napisane – temat urządzania wnętrz jest wymagająca.
Przydatne podejście.
Szczerze inspirujące. Szukałam czegoś takiego już jakiś czas.
Pozdrawiam!
Also visit my webpage; http://www.abgodnessmoto.Co.uk
Naprawdę dobry materiał. Dużo przydatnych wskazówek.
Dziękuję za ten materiał. Czekam na więcej.
Masz rację – kwestia doboru mebli bywa niełatwa.
Dobrze, że ktoś to wyjaśnia.
Bardzo pomocne. Szukałam czegoś takiego od dawna.
Dziękuję!
Have a look at my homepage :: Rosalinda
I take pleasure in, lead to I discovered exactly what I used to be taking a look for.
You have ended my four day lengthy hunt! God Bless you man. Have a great day.
Bye