CAMERA SHAKE in Unity Video Lecture | Build a Game: Unity Tutorial (English) - Game Development

a great way to add some extra oomph to a
game is by using camera shape whoa it's
great for emphasizing action and making
your camera feel more part of the world
so in this video we'll go over how to
make your own camera shake and towards
the end I'll show you how to set up an
awesome tool that I personally use to
shake things up get it because of the
shape also this video is sponsored by
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you will have created six different
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you're interested in simply click the
link in the description to get started
and get a discount also special thanks
to Sean Carey Diego guy kudamon dying
guy in Murphy o infinity PBR your io mer
and hands off tuned for their support on
patreon alright let's get started so
here's the scene in unity where every
time I click with my mouse and explosion
appears but of course this could look
way cooler if we added some camera shake
to do that that's select our main camera
and let's add a new component to this
called camera shake let's say new script
select C sharp and hit create an ad now
we can go ahead and delete both of the
methods here and instead we want to
create our own one but we don't want
this to be a normal function we want
this to be a cover of team if you've
never heard about Kuro teens before I
suggest checking out the link in the
description for now we're just gonna
power through whenever you're working
with Kuro teens you want to make sure to
have using system dark collections and
instead of writing void at the beginning
of her function we now write I in
numerator then we follow it by the name
of our function which we'll just call
shake and our shape function is going to
take in two parameters one for the
duration of the shake and one for the
magnitude in other words the strength of
our shake and the first thing that we
want to do is store the original
position of our camera before we start
shaking so that we can reset it once
we're done we'll create a vector3 for
this and call it original position and
size equal to transform that local
position and then we want to create a
while loop because we want to keep
shaking for X amount of seconds
specified by our duration so we could go
ahead and create a float called elapsed
this is going to keep track of how much
time has elapsed since we started
shaking so by default we'll set this to
zero then we want to keep shaking as
long as while elapsed is less than the
duration so in other words as long as
the amount of time that has gone by
since we started shaking doesn't exceed
the duration well then we probably want
to keep shaking and now a bunch of
different ways to calculate the offset
you want to apply to your camera in
order to make it look like it's shaking
but it can actually be done in an
extremely simple way we're simply going
to be offsetting it by a random amount
on the X&Y
every frame so first we'll calculate the
X so float x equals a random range
between negative 1 and 1 and we can then
multiply this with our magnitude so the
greater the magnitude the more will
offset our camera and we'll do the same
thing on the y so float y equals random
that range between negative 1 and 1 and
we'll multiply it again with the
magnitude then we simply need to apply
this offset to our cameras position so
we'll go transform local position equals
a new vector3
and here we'll give it our X or Y and
you could definitely offset it on the Z
as well but in our case I don't think
that's necessary so we'll simply use
original position dot Z and this is kind
of where the magic of the kuroh teen
comes in because we want this while loop
to basically be running alongside our
update function so that every time the
update function runs we go through and
run this code once as well to do that we
use a single line of code we write yield
return no this basically means that
before we continue on to the next
iteration of the while loop we want to
wait until the next frame is drawn again
the syntax might be really weird if
you've never encountered a current team
before but that's basically what is
happening also we of course want to make
sure to update our elapsed time so right
before we wait for the next frame we are
going to write elapsed plus equals time
Delta time so every frame we increase
this value by the amount of time that
went by and so this is going to keep
running until we exceed our duration at
which point we're going to get to this
point in our code
and we can go ahead and reset our
position so we'll go transform dot local
position equals our original position
and there we go we've now created a crow
routine that is going to shake our
camera of course we want to be able to
access this from another script in order
to trigger it so we'll go ahead and mark
it as public then we can go back into
unity we should see we have no errors
here we can go to the point where we
want to trigger our camera shake in my
case that's under my explosion trigger
this is just a very simple script that
every time I click with my mouse is
going to play this particle effect so
let's open up the script and as you can
see this is exactly what it's doing we
reference the explosion we check if we
can Emmaus button down and if we do we
press play on the explosion so just like
we reference our particle system we also
need to reference our camera shake so
public camera shake and we'll just call
it camera shake and then right after our
explosion starts playing let's go camera
shake dot and then we can simply call
this shake function however here's
another thing that you need to remember
when working with kuroh teens and that
is whenever we want to start a kuroh
teen we can't just call it like a normal
function instead we have to go and write
start co-routine and we then pass it the
function that we want to start like this
and now we can simply feed it the
duration I'm gonna set that to 0.15 and
the magnitude I'm gonna set that to 0.4
and now if we save this go to unity and
drag in our main camera and then try to
press play we can see that something
happens the camera is definitely shaking
but it also seems to be snapping to
another position that's because we're
currently just overriding the position
of our main camera and our main camera
might have some position in the world
that we don't just want to ignore so
what we do instead is create an empty
game object that is basically gonna be
the anchor of our camera so we'll go to
the hierarchy right click on our camera
and hit create empty I will call this
our camera parent or camera holder and
make sure to reset the transform here so
it's at the same position as our main
camera we'll then drag this out and
instead take our camera and parent it to
the camera holder so now our main
cameras position should always be 0 0 0
and then when we want to actually move
our camera we instead move the camera
holder this means that we can go ahead
and over
the position of our camera as much as we
want it's still going to stay in the
same general area under the camera
holder so if we now hit play we can see
our camera shake is working awesome so
let's say simple and quick way to do a
camera shake by yourself but it has some
limitations it doesn't give too much
control over this shake it doesn't
rotate the camera in any way
there's no fading in and out of the
shake and there's no control over
roughness or frequency it's always
moving the camera every frame and so if
you want smoother shaking this is not
the way to go and also having to
reference the camera shake every time
and you start cover teens seems a bit
clunky so if you want to get serious
about your camera shake I recommend
going to the asset store and picking up
easy camera shake it's completely free
and I'll of course have a link for it in
the description I'm gonna go ahead and
hit import hit import once more I should
now see a folder in your project called
easy camera shake only we have some
documentation the different scripts as
well as a demo scene that you can check
out in our case I'm just gonna go to the
game view here I'm gonna select our
camera and get rid of the camera shake
and instead I'm gonna go under the ICI
camera shake and add the camera shaker
here we can choose how much we want this
shake to influence both our position and
rotation for now we can just leave these
values as is and the cool thing is that
if we now go into our explosion trigger
we can get rid of this variable at the
top I'll go ahead and delete this piece
of code as well instead we'll go to the
very top and say that we want to be
using easy camera shake and now all we
need to do is go camera shaker dot
instance and then we can do dot shake
once and this is going to shake the
camera once with all the values that we
now specify first we're gonna give you
the magnitude imma said that too for we
can give it a roughness as it says here
roughness of the shake lower values are
smoother higher values are more jarring
I'm gonna set this to forest well since
we are working with an explosion here we
then set the fade in time I'm gonna set
that to 0.1 and a fade out time and I'll
set that to 1 and if we save this and
play well now we now have a much
smoother camera shake that is both
easier to use and allows for a much more
in-depth control pretty cool right now I
guess all we need is some sound effects
that's pretty much it for this video if
you
make sure to subscribe so don't miss a
future one also make sure to check out
the complete unity 3d game development
course that's something in the
description on that thanks for watching
and I will see you in the next video
thanks to all the awesome patreon
supporters who donated in January and a
special thanks to Sean Kerry Diego guy
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