►
Description
A native language like C++ is still a natural choice for real-time graphics applications and also has an established workflow for bridging code between the desktop and browser world. For revamping our old 3D rendering module, we also wanted to consider other alternatives. It was quite clear Rust offers great modern tooling and promising new concepts. But most importantly after evaluating two proof of concepts, we saw that the Rust environment is already very mature and supports all our critical requirements. Additionally, future browser features like WebGPU and WebAssembly SIMD (for CPU rendering) are first-class Rust citizens which will get interesting for us once they get production-ready. Join our experience report on why we think that Rust is a great choice for our use case and how we want to use it in the future.
About Harald Reingruber
Harald Reingruber is passionate about visual computing, software crafting, ensemble- (a.k.a mob-)programming, and hiking on the weekends.
Rust Linz at https://rust-linz.at
Twitter: https://twitter.com/rustlinz
Harald Reingruber: https://twitter.com/Harald3DCV
Speak at Rust Linz: https://sessionize.com/rust-linz
A
A
We
basically
started
a
few
months
ago
working
with
rust,
so
it
will
be
more
experience,
report
of
what
we
learned
and
how
we
approached
our
journey
into
rest.
So
I
guess
from
all
the
technical
details
I
probably
could
learn
even
more
from
the
audience,
but
still
yeah.
I
think
we.
There
are
some
really
interesting
things.
We
we
found
out
so
far.
A
A
A
A
2D
slices,
the
images
are
taken
and
the
dicom
format,
which
is
a
popular
or
the
main
format
for
radiology
image,
data
stores,
all
the
data
into
the
images
and
these
can
be
reconstructed.
Can
you
can
be
visualized
as
a
3d
volume,
which
is
basically
a
stack
of
2d
images
and
where
each
pixel
is
called
the
voxel.
A
And
volume
rendering
works
by
shooting
rays
through
every
pixel
of
the
screen
through
the
3d
volume,
so
yeah
you
can
imagine
in
it
like
this.
You
have
like
a
virtual
camera
which
goes
through
your
screen
plane,
and
then
you
check
all
the
voxels
along
the
array,
the
the
intensity
values,
and
this
way
you
can
create
a
3d
image
from
the
from
the
2d
data.
Initially.
A
B
A
A
A
A
A
A
A
B
A
We
in
the
end,
we
decided
that
we
skipped
the
desktop
version
for
c
plus
plus
it
kind
of
took.
It
was
a
little
bit
cumbersome,
getting
all
the
glue
and
stl
and
all
the
opengl
libraries
to
work.
But
I
mean
we,
we
kind
of
knew
that
it
would
work
eventually,
and
so
we
decided
we
don't
have
to
do
it
fully
to
the
end.
A
Yeah
so
currently
our,
but
our
future
integration
plans
are
for
the
module.
Is
we
want
to
right?
Now
we
have
the
java
desktop
application,
which
uses
the
c
plus
plus
3d
module,
and
it's
using
directx
underneath
it's
integrated
with
gni.
That's
the
java
native
interface
and
we
add
wrap
it
behind
the
proxy
or
fs8.
A
So
we
decided
that
the
current
gni
interface
is
kind
of
the
rigid
interface
and
we,
when
we
create
a
new
one.
We
consider
it
more
the
flexible
interface,
because
there
are
many
choices
made
for
the
current
module-
maybe
not
always
the
best
ones,
but
we
know
that
it's
working
well,
and
so
we
didn't
want
to
make
the
same
mistakes
again.
So
we
decided
we
will
for
now
make
a
similar
or
equal
interface,
and
maybe
once
we
we
have
everything
in
place.
A
And
once
we
all
the
features
of
of
the
old
module,
also
they
are
in
the
new
module.
We
can
even
consider
removing
the
old
module
or
even
the
proxy
and
the
facade,
if
you
don't
need
it
anymore,
yeah.
This
is
a
pattern
which
is
called
strangler
thick
pattern.
I
really
like
this
illustrative
analogy:
it's
it's
named
after
the
strangler
fig,
which
starts
growing
in
the
top
of
a
tree
and
grows
down
and
wraps
the
current,
the
actual
the
hosts
tree
until
the
host
dies,
and
basically
the
tree
will
be
made
of
the
stranglific.
A
Eventually
so,
and
this
running
they're
all
in
the
new
module
side
by
side
until
the
feature
parity
is
reached,
there's
a
couple
of
advantages.
The
first
of
all
it
reduces
the
risk
of
a
rewrite
project
because
you
yeah,
when
you
start
rewriting
something
from
scratch.
It
might
take
a
lot
of
time
until
you
can
actually
replace
it,
and
it's
this
running
it
side
by
side
allows
you
to
early
to
figure
out
if
there.
A
What
we
found
out
so
c
blasphemous
is
a
very
established
language
and
environment.
That's
certainly
an
advantage,
but
with
us
the
compile
time
is
really
short,
which
means
less
workflow
interruptions,
so
you
can
more
focus
during
the
development
and
test
cycle.
You
can
focus
more
on
the
task
attend.
A
We
never
had
to
fight
any
null
pointer
issues,
except
with
the
when
we
share.
We
share
the
pointers
over
the
tni
interface.
Then
you,
where
you
have
to
go
to
unsafe
land
there.
You
can
still
have
the
pain,
but
it
was
really
really
rare.
So
within
rust,
this
is
really
great
and
the
platform
interoperability.
A
A
One
thing
that
we
are
looking
at
is
instructions
cmd
instructions,
so
maybe
maybe
if
you
never
heard
of
of
it,
if
you
have
to
process
a
lot
of
data
and
have
to
do
the
same
operations
on
on
on
each
item
or
reach
a
value
over
and
over
again,
I
usually
have
a
for
loop
and
each
operation
is
processed
sequentially,
but
we've
seen
the
instructions.
These
are
low-level
processor
instructions.
A
It
allows
you
to
do
the
same
instruction
on
four
or
eight
values
at
the
same
time.
So
this
really
can
offer
a
great
performance,
improvement
and
yeah.
As
when
you
look
at
the
cats
there
in
the
lower
row,
they
are
all
moving
at
the
same
time.
So
this
is
of
course
much
more
efficient
and
there
is
a
this
feature
is
still
highly
experimental
in
the
browsers,
but
there
already
is
a
portable
sim
project
from
rust,
which
might
come
in
handy
in
the
future.
A
If
you
have
an
intel,
cpu
or
arm
or
amd
cpu,
so
usually
it's
not
really
portable
and
it
was
always
having
a
portable
library
where
you
write
your
themed
instruct
code
once
and
you
can
use
it
across
operating
systems
and
across
different
processor
technology
was
always
really
difficult.
So
we
are
really
looking
forward
to
take
advantage
of
this
one
yeah.
I
wanted
to
do
a
short
recap.
A
Also,
if
you
have
a
full
screen,
rendering
of
a
full,
a
full
full
hde
resolution,
it
would
mean
you
have
to
virtually
shoot
two
million
rays
for
each
pixel
yeah
for
each
pixel.
One
way
and
the
diagonal
of
that
volume
is
means
that
you
have,
in
the
worst
case,
1700
steps
for
each
ray
and
for
interactive
visualization
when
you
rotate
the
volume
or
zoom
in
and
zoom
out,
you
want
to
deliver
interactive
frame
rate
of
30
to
60
frames
per
second,
so
yeah
this.
A
A
Just
one
or
two
weeks
ago,
the
first
public
working
draft
came
out
and
it's
already
available,
via
prefer
preview
flags
in
the
preview
process.
So
it's
also
quite
experimental
so
far,
but
there
is
a
lot
of
things
going
on
in
this
direction
and
the
community
is
growing
which
verifies
to
us.
That
rust
is
definitely
the
right
choice
and
also
many
big
players
are
actively
supporting.
A
A
A
A
A
As
I
mentioned,
I'm
based
in
charleston
upholstery,
but
our
office
is
in
vienna,
so
I'm
usually
there
for
a
couple
of
days
per
month,
and
here
you
also
find
our
contact
details.
If
you
want
to
reach
out
to
me
on
twitter
or
via
email,
also
to
my
awesome,
co-worker
katarina,
who
is
not
able
to
be
here
today,
but
yeah.
A
B
B
It
is
an
established
language,
but
it
isn't
as
classical
established
like
c
c
plus
plus,
so
it's
always
very
interesting
to
hear
real
life
stories
and
to
hear
established
companies,
betting,
the
farm
on
a
programming
language
like
that
I
mean
it's.
A
very
important
field
that
you're
working
in
and
hearing
that
you
are
considering
rust,
playing
with
rust
and
planning
to
use
rust
is
super
interesting.
B
Let
me
start
with
one
question
that
follows
up
on
your.
I
think
it
was
the
second
last
slide.
You
are
hiring.
You
said:
what
is
your
experience
in
austria?
You
are
a
company
in
austria.
You
are
offering
rust
jobs.
Is
there
already
a
market
for
rust
developers?
Do
you
get
a
lot
of
resumes
to
take
a
look
at?
Is
it
hard
to
find
experts
in
this
area?
Can
you
share
your
experience
a
little
bit?
I
bet
a
lot
of
people
in
the
audience
are
interested
in.
B
A
B
Oh
interesting
very
interesting:
we
have
one
question
from
the
audience
which
has
not
yet
been
answered:
koshi
kim,
I'm
not
sure
if
how
to
pronounce
the
name,
maybe
it's
an
abbreviation
he
or
she
is
interested
in
where
to
find
additional
information
about
compilation,
time
comparison
between
c
plus
and
rust.
Do
you
have
any
numbers
to
share,
or
can
you
elaborate
a
little
bit
more
about
your
experiences?
The
experiences
of
your
team
in
terms
of
compilation,
time.
A
Unfortunately,
I
cannot
share
any
numbers,
but
I
think
the
well.
What
I
experienced
is
that
incremental
compilation
is
a
lot
better
with
rust,
yeah.
I
think,
as
far
as
I
remember
c,
plus
kind
of
has
the
problem
that
the
header
files
needs
to
be
need
to
be
parsed
that
they,
I
think
they
block
the
the
language
with
improving
the
compilation
time
at
some
to
some
extent.
A
I
think
there
are
some
ways
to
work
around
it
and
so
on,
and
there
are
some
clever
techniques
that
this
is
less
of
an
issue,
but
I
think
c
plus
was
not
able
to
completely
solve
it.
Maybe
if
the
new
sublux
plus
modules
kind
of
reduces
the
pain
through
a
smaller
scope,
but
this
pain
is
still
there.
I
guess-
and
this
is
something
I
realized
in
rust-
is
really
smooth.
B
Okay,
thank
you.
Thank
you
very
much
for
this.
For
this
insight.
It's
as
I
said,
always
interested
to
hear
about
rust
in
practice.
I
currently
don't
see
additional
questions,
so
I
have
two
questions
left.
They
are
more
of
the
organizational
part
harl.
I
think
you
are
already
on
our
discord
server
right,
yes,
awesome!
B
So
if
people
have
questions
or
would
like
to
exchange
experiences,
they
can
get
in
contact
with
you
via
this
the
discord
server
and
I
think,
if
anybody
is
interested
in
working
with
your
team,
they
can
also
approach
you
via
the
discord
server,
and
the
second
thing
is,
it
would
be
awesome.
I
don't
know
if
that's
possible,
if
you
would
share
the
presentation
with
us.