hey guys and welcome back to another
tasty blender 2.81 tutorial today we are
taking a look and particles we're gonna
make a particle system that has partial
self collision now if you don't know
what that means is basically if you want
to have a particle system where the
particles bounce off of each other you
would either have to use a rigid body
system with lots of bodies and that
breeze knows your system down or you
would have to use a molecular atom which
is very useful add-on but we're trying
to make this with what we have we're
gonna use the default particle system to
make little spheres go around a bigger
sphere which is a really useful exercise
in this case let's get into it we're
gonna open up manuals you can any1
delete everything in the same name we
started working we have to set up our
objects first things first we're gonna
add a cube we're going to move it on the
y-axis a couple no tricks pipe we're
gonna add a UV sphere so one UV sphere
let's say get like so and we're going to
duplicate it and move it back and let
this get it down a bit to choose
everything and reset the scale and now
we start working on our objects first
things first the collision object which
is going to be our sphere we are going
to set the condition here to damping 0.9
anti-friction 0.9 and this is completely
fine as a particle we're going to make
it particle the other sphere and our
cube is going to be our system so our
particle system now let's set up the
particle system is very important you
know first how long your animation is
going to be so mine is going to be the
same a hundred fifty frames so life time
is going to be a hundred fifty frames
because we want the particles to live as
long as possible let me go to source and
we select volume if we're going to
render mode we can see everything and we
choose grid you choose the resolution
oh yeah so and we choose the end of the
animation to be number one so we have
everything in a grid we can lower the
resolution to take about eight and we
can move on to the next step which is
actually choosing in the render type the
object and the object is going to be our
spheres of our particle let's rescale it
so the particles barely barely touch so
we have that type of size yeah that's it
okay now we have to turn off gravity for
them so that when we play they stay in
the same place next step is to put a
force field inside of the other sphere
which is here again in the center and
we're going to set the strength to let's
say minus 15 and what happens is the
particles are directly attracted to the
sphere but they don't behave like we
want to we want to have them encircle
the sphere so how do we do that there is
a worker mode there is a partial
workaround in blender in physics that so
before the physics that would use
rotation dynamic okay so we have this so
this one is happening now we want
condition it's really good but usually
these bicycles don't have collision
between themselves so how can we fake
that partially at least well we're gonna
choose in the basic styles of fluid
basically with decimals it attracts the
particles so that they behave sort of
like a fluid now we can see we have a
lot of them so we can actually lower it
down the resolution because we want to
just have them available the sphere now
if we want to set up this correctly we
also need the forces to be correct as
possible right now they're just a bit
too strong so we can either slow me down
with the flow so basically the flow is
going to
let's say slow down the whole force
animation for now it seems okay let's
take a look back at our particle system
and let's tweak it a bit now stiffness
is how stiff the overall structure is
going to be we don't want them really
stiff so we can leave it at one this
Casa T is the hole it's a the tension of
the whole fluid so we can play around
with that but I think the most important
thing over here is in the Advanced tab
which is repulsion factors so how they
distribute themselves
I'll have the interaction radius so as
you can see this radius is like ignore
this because they don't want to stay
within themselves so what we want to do
and it's just fine-tune this so they get
as close as possible so let's say about
here but close as possible but they
still envelop the actual sphere like so
and last thing we can say is sound
effect and the type of force and we can
send the force you can say something
very small like 0.02 and choose
presentation and what this does is going
to create a self-reflective effect in
the whole system now if you want to have
them coming on the object and then
distributing themselves you just have to
increase the strength of our physics
system so basically it's just playing
around with the fluid simulation part of
the particle system it's not it's not
foolproof because we still have some
collision issues around here but it's
close enough I mean if you want to have
this type of effect with the normals
let's say settings you would have to use
rigid bodies and we take a lot of sensor
processing this way you get something
that looks really cool but it's just
reworking on the
distant system so hopefully you liked
this tutorial hopefully it helps you out
with understanding particle systems and
how to make your own animations if you
really enjoyed this video drop like
leave a comment subscribe I really
appreciate that and thank you so much
for taking your time in watching this
video and see you in the next one bye