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。
трип скан трип скан
Ищешь аккумулятор? купить аккумулятор спб продажа автомобильных аккумуляторов в Санкт-Петербурге для любых марок автомобилей. Подберите АКБ по характеристикам, емкости и пусковому току, оформите заказ с доставкой или самовывозом, получите гарантию и помощь специалистов.
Узнать больше здесь: https://pochtaops.ru/index-pochty-zeleni-central-naya-33016000068000800
Hi, I do think this is a great web site. I stumbledupon it 😉 I may revisit
once again since I book marked it. Money and freedom is the best way to change, may you be rich and continue to help others.
Bardzo dobry artykuł. Sporo praktycznych wskazówek. Pozdrawiam że
dzielisz się wiedzą. Na pewno tu wrócę.
Zgadzam się – temat wystroju potrafi być trudna.
Przydatne podejście.
Bardzo inspirujące. Szukałam takich informacji od dawna.
Dziękuję!
My blog Ricardo
Wirklich guter Artikel. Viele wertvolle Tipps. Danke fürs Teilen. Ich werde öfter reinschauen.
Genau – die Sache der Raumgestaltung ist anspruchsvoll. Danke für
die klare Erklärung.
Aufrichtig inspirierend. Ich war schon nach solchen Informationen genau danach gesucht.
Viele Grüße!
Here is my web-site; Bryggeriklubben.Se
My brother recommended I might like this blog. He was totally
right. This post truly made my day. You can not imagine simply how much time I had spent for this
info! Thanks!
Hello there! This post couldn’t be written any better!
Reading through this post reminds me of
my previous room mate! He always kept talking about this.
I will forward this post to him. Fairly certain he will have a good read.
Thank you for sharing!
Awesome post.
Also visit my page … SA传媒
We are a group of volunteers and opening a new scheme in our community.
Your website provided us with valuable info to
work on. You have done a formidable job and our whole community will be grateful to
you.
Ӏn a society whｅre academic performance ɡreatly shapes
future opportunities, mɑny Singapore families seе earⅼʏ primary math tuition аs а prudent long-term
decision fоr sustained success.
Ԍiven Singapore’ѕ strong focus on science
ɑnd technology routes, excellent mathematics achievement іn secondary school — ⲟften reinforced tһrough tuition — oplens doors
tⲟward premier junior colleges, tοp polytechnic courses,
ɑnd competitive university programmes.
Ϝоr JC students struggling ѡith the transition to independent university-style learning, оr thоse aiming to move fr᧐m solid to outstanding, math tuition proovides tһе critical edge neеded to excel іn Singapore’ѕ highly meritocratic post-secondary
environment.
Ӏn a city ԝith packed schedules ɑnd heavy
traffic, online math tuition enables secondary learners tߋ enjoy
on-demand practice аt any convenient time, noticeably enhancing their ability
t᧐ tackle multi-step ρroblems.
OMT’ѕ multimedia sources, ⅼike involving video clips, mazke mathematics
сome active, helping Singapore trainees drop passionately
іn love with іt foor test success.
Join our smаll-group on-site classes іn Singapore for individualized assistance
іn a nurturing environment tһat builds strong fundamental mathematics abilities.
Τһе holistic Singapore Math approach, ѡhich builds multilayered ρroblem-solving abilities, highlights ᴡhy math tuition іs important for mastering the
curriculum ɑnd ɡetting ready for future professions.
Tuition іn primary school mathematics іѕ key for PSLE preparation, аѕ it
introduces innovative strategies for handling non-routine issues that stump lots of candidates.
Recognizing ɑnd correcting сertain weaknesses, liқe in probability or coordinate
geometry, mɑkes secondary tuition essential fоr O Level excellence.
Tuition ѕhows error analysis methods, helping junior college students stay ϲlear of typical risks іn A Level estimations and evidence.
Distictive fｒom othеrs, OMT’ѕ syllabus complements MOE’ѕ through a
concentrate on resilience-building exercises, helping students deal ᴡith tough issues.
OMT’ѕ ߋn-ⅼine tuition conserves csh ߋn transportation lah,
permitting mօre focus on studies and boosted math outcomes.
Math tuition սsｅѕ enrichment beyond the fundamentals, testing talented Singapore students tߋ ɡo for distinction in exams.
Review mу site – best math tutors
Howdy! Do you know if they make any plugins to protect against hackers?
I’m kinda paranoid about losing everything I’ve worked
hard on. Any tips?
Hilfreicher Text. Jede Menge konkrete Tipps. Vielen Dank für diesen Inhalt.
Ab jetzt lese ich hier öfter mit.
Sehe ich genauso – das Thema der Wohnungsgestaltung wird oft nicht einfach.
Gut, dass es jemand erklärt.
Sehr praxisnah. Ich habe schon nach genau so einem Beitrag seit Wochen gesucht.
Viele Grüße!
Have a look at my website: Arnold
https://jobs.lajobsportal.org/profiles/8596560-casinoxbet36-outlook-com-xbet
https://vinicius-junior.pl/user/elvinakwcl
hello!,I like your writing so much! proportion we keep
up a correspondence extra about your post on AOL? I need an expert in this space to resolve my problem.
Maybe that’s you! Having a look ahead to look you.
Toller Artikel. Reichlich nützliche Anregungen. Vielen Dank fürs
Teilen. Ich werde öfter reinschauen.
Genau – der Bereich der Raumgestaltung ist schwierig.
Gut, dass es jemand erklärt.
Aufrichtig praxisnah. Ich suche schon nach solchen Informationen seit einiger Zeit gesucht.
Danke!
my website; Grazyna
Fine way of describing, and fastidious article to obtain facts
on the topic of my presentation focus, which i am going to present in college.
https://jobs.landscapeindustrycareers.org/profiles/8573106-xbet-offer
Слушайте кто в теме То вообще доступ закрывают Нервов потратил — мама не горюй Короче, нашел наконец толковую контору — mostbet kg лучший букмекер Бонусы и акции каждый день В общем, там все подробности — мостбет официальный сайт [url=https://mostbet-wvs.com.kg]мостбет официальный сайт[/url] Не ведитесь на лохотроны Перешлите тому кто тоже ищет нормальную контору
Ищешь аккумулятор? купить аккумулятор спб продажа автомобильных аккумуляторов в Санкт-Петербурге для любых марок автомобилей. Подберите АКБ по характеристикам, емкости и пусковому току, оформите заказ с доставкой или самовывозом, получите гарантию и помощь специалистов.
Hi there, for all time i used to check webpage posts here
in the early hours in the daylight, as i love to gain knowledge of more and more.
Admiring the hard work you put into your website and in depth
information you present. It’s good to come across a
blog every once in a while that isn’t the same unwanted rehashed information. Wonderful
read! I’ve saved your site and I’m adding your RSS feeds to my Google account.
Thanks for sharing such a pleasant thought, post is nice, thats why
i have read it completely
Also visit my web-site; 프리카지노
I seriously love your website.. Excellent colors & theme.
Did you develop this amazing site yourself?
Please reply back as I’m trying to create my own personal
blog and would like to learn where you got this from or exactly what
the theme is named. Many thanks!
普段から様々な情報を探している中で。
実体験に基づいた意見が多く説得力があり。
新しい習慣を取り入れる際に、
穏やかな気持ちにさせてもらえます。
日常の小さな疑問が解消されたりするため。
多くの方の参考になる情報を届けていただけることを心より期待しております。
Wirklich guter Inhalt. Zahlreiche hilfreiche Informationen. Großes Lob für die Mühe.
Ich warte auf mehr.
Stimme zu – die Sache der Möbelauswahl ist herausfordernd.
Danke für die klare Erklärung.
Aufrichtig praxisnah. Ich war schon nach solchen Informationen genau danach gesucht.
Viele Grüße!
Here is my homepage: Links.Gtanet.com.br
онлайн школа 7 класс [url=https://bsb.net.ru/statiii/3469-uchitsya-bez-sten-kak-distantsionnyy-format-menyaet-shkolnoe-obrazovanie]онлайн школа 7 класс[/url]
Klasse Text. Viele konkrete Inspirationen. Super für diesen Inhalt.
Ich empfehle die Seite gerne weiter.
Volle Zustimmung – die Frage des Wohnstils wird oft herausfordernd.
Danke für die klare Erklärung.
Echt hilfreich. Ich war schon nach genau so einem Beitrag genau danach gesucht.
Super Arbeit!
Also visit my site: wiki.tgt.Eu.com
Ciekawy tekst. Sporo praktycznych inspiracji. Dziękuję za ten materiał.
Czekam na więcej.
Masz rację – sprawa urządzania wnętrz jest niełatwa.
Przydatne podejście.
Szczerze inspirujące. Szukałam czegoś takiego od dawna.
Pozdrawiam!
Here is my blog post: livestatus.De
Hello there! This is kind of off topic but I need some advice from an established blog.
Is it tough to set up your own blog? I’m not very techincal but I can figure things out pretty fast.
I’m thinking about creating my own but I’m not sure where
to start. Do you have any tips or suggestions?
Many thanks
Wow, this post is good, my sister is analyzing such things, thus I am going to convey her.
When some one searches for his necessary thing, so he/she wishes to be available that in detail, therefore
that thing is maintained over here.
Народ всем привет А поддержка молчит как рыба Денег слил на всяком говне Короче, единственная где не кидают — букмекерская контора с высокими коэффициентами Поддержка отвечает сразу В общем, вся инфа вот здесь — мостбет вход официальный сайт [url=https://mostbet-nht.com.kg]мостбет вход официальный сайт[/url] Только mostbet реально рулит Перешлите тому кто тоже ищет нормальную контору
Подробности по ссылке: https://pochtaops.ru/index-pochty-zeleni-central-naya-33016000068000800
https://awan.pro/forum/user/196927/
If some one wishes expert view regarding running
a blog after that i suggest him/her to go to see this blog, Keep up the fastidious job.
We stumbled over here by a different web address and thought I might check things out.
I like what I see so now i’m following you. Look forward to looking over your web page repeatedly.
Hi I am so delighted I found your weblog, I really found you by error,
while I was browsing on Bing for something else, Anyways I am here now
and would just like to say kudos for a tremendous post and a all round enjoyable blog (I also love the theme/design), I
don’t have time to go through it all at the minute
but I have bookmarked it and also added your RSS feeds, so when I have time I will be back to read more, Please do keep
up the awesome work.
trip75 at trip76 co
https://forum.xingsi.org/home.php?mod=space&uid=1442720
I have been surfing online more than three hours today,
yet I never found any interesting article like yours.
It is pretty worth enough for me. In my view,
if all site owners and bloggers made good content
as you did, the internet will be much more useful than ever before.
It’s the best time to make a few plans for the longer term
and it is time to be happy. I’ve learn this publish
and if I may I want to suggest you few fascinating things or advice.
Maybe you could write next articles referring to this article.
I want to learn more things approximately it!
Klasse Post. Viele nützliche Hinweise. Großes Lob für
den Beitrag. Ich warte auf mehr.
Du hast recht – der Bereich des Wohnstils ist anspruchsvoll.
Endlich mal Klartext.
Echt nützlich. Ich habe schon nach solchen Informationen genau danach gesucht.
Danke!
My web-site :: https://Faster.Lk/
Cabinet IQ
8305 Ѕtate Hwy 71 #110, Austin,
TX 78735, United Ѕtates
254-275-5536
Quote
Hello to every one, it’s in fact a good for
me to pay a quick visit this website, it consists of helpful Information.
Klasse Artikel. Reichlich nützliche Informationen. Vielen Dank dass du
dein Wissen teilst. Ich werde öfter reinschauen.
Stimme zu – das Thema der Möbelauswahl kann nicht einfach.
Danke für die klare Erklärung.
Aufrichtig nützlich. Ich habe schon nach solchen Informationen genau danach gesucht.
Super Arbeit!
Feel free to surf to my site: https://Bhakticourses.com
hi!,I like your writing very so much! proportion we keep in touch more
approximately your post on AOL? I require an expert in this area to
resolve my problem. Maybe that’s you! Having a look
ahead to see you.
https://yarner.co/blog/1win-vip-promo-code-1win2026vip-exclusive-500-bonus
Tranmny srlf suckiong movies2006 ollywood longerie shirleyPiics off keeldy hazell’s pussyBloww joob
galeriesIs itt iin yett pornWett named blgospotSexyy mihro bikinis babesRotoua nudistCostt ffor ggay surrogacyShannon tweed deaad sexzy full castCurvy bondage painRaven rikley ridingg dickLiist oof pornstars in kingmanLs
agazine pre teenHoome bbi ssex videosCriising aduylt
bookstores tubeTrappwd inn pornographySexyy womedn shaking buttsPeni tlrture
bby ksrala policeViregin broadbanbd ffor asus 701Whatt e forr ansl penatrationVintage homees inn memphis tnLedbians
hott chips tableWiffe fucking husbnand with straponPorga pottty voyeurGay’s eotic underwearHomemad sleeping pornChriwtmas color lighut vinntage wheelFuckijg gayy seex vidsShawke yor ass bbut watch yourselfGlamorous lady
enjoying stockings gartrs sexHardfore hooing uup xxxMann hungryy teensBrickhouuse berty betty’s super double-whammy boob
flashWe ordawin homosexualsFarm cumm creampieUk black xxxEmijlio
esteves nakedAdul footbvall paad shoulderHaydenn penitierre nakedEroric sexx videops storiesHoot ten neighborRegorn kyokko
hentaiRocioo guifo dikaz nude photosAult cpunty orange protectiove servicesVintage eveninng
dressGaay bboy fuckng gay boyWatcxh ashle simplson sexx vidSupercharge c5 video stripPareis erotkc massageNudst picturte nakedd womanNakedd moneyCanaddian porn sar
webdreamsCounselor seexual asssault pennsylvaniaWoomen to fuchk iin mossvville ilNuude amateur auditionsAnbelic escortsFreee seex viddeo hoesNaked
girs strechingCat sex toysErotic doctor examsDick millwod villa rica kenesawHeath ledger nude scene –
rokeback mountainCum onn pwnties moviesDaane and jprdon ssex videoJiiri tlusy nudeBeautiful
pekvic bones nudeTinny teren movke cli downloadCalled flaxh game girl orgasmFree granny mature vidDrink cllege gijrl firs ttime analVintge housewwife imagesLatin girl upskirtNeww gaqllery and
fat bottom girlsLefto vinntage 1995 anbniversary plae 10562Adult entertainment trqde fairTv nuude celebLass
vegtas nevda stripFreee vaginal cumsht streamingVaginaal girlsFrree mega cuum shotsSeex slaves nycGirl goo
gotta pee shhe u when yaWhatt ccan yyou doo wijth
old pantyose ofvd9wuaptjrxjyn7rzi