All language subtitles for 08. 3D geometry choices in NUKE

in this lesson

we will discuss which types of 3D geometry to

utilize for our image projections

now we've already set up our 3D scene

and we have our 3D cards already assembled

so in actuality

what we've already done should work

but I'd like to go a little further in

depth about the geometry that could be utilized within

just Nuke's 3D side

so with that in mind

let's go over to the 3D drop down menu on the left here

so we go to geometry

you have a few things we already discussed

you know we mention cards

you mention that you can make cubes

you could also make cylinders

you can make spheres

okay so those are the basic geometric shapes

but there's a few other nodes in here that

also are very useful

you have things such as Regio

so you could actually bring in

like had we had previously just briefly mentioned

you can bring in

various geometry from other 3D packages

so you could bring in something from

from my for instance

that's modeled out to accurately match this 3D shape of

of the actual building

the cool thing about that is

then you can do some really complex camera moves

that otherwise you wouldn't be able to achieve a nuke

without having a higher level of 3D geometry to utilize

so that's a very exciting thing

you also have things such as the model builder

so Model Builder is actually a pretty powerful node

I'll just select it here

you can actually kind of

see some of the controls for it

but the basic jist of Model Builder is

and and also

just so you know

Model Builder only works in Nuke X

so it's some

it's another tool that is available

as long as you have a Nuke X license

now the cool thing about Model Builder is basically

you can create various 3D objects

the simple objects

like cards or

or or spheres or whatever

and then you're able to actually modify them

now the the neat thing with this

and what makes it actually really useful

is if you have a tracked camera

that you can connect to that

then you're basically able to adjust your points

of the various vertices

of those different shapes

from various camera angles

of your timeline

utilizing your camera

that's got that

that has that match moved information

now the cool thing about that is

then you're able to get a very

a reasonably accurate

geometric solve

based upon what you already have done

so we could actually go ahead and build that

utilizing what we've done

but in this case

it's really not necessarily uh

useful because what we're building

our geometry

is based upon 2D objects

not based upon the 3D objects in the scene

so if we were trying to

for instance replicate

we just go back to our live Action care

if we were trying to replicate

let's say there

was a building sitting on this hill in

in real life and that

and we wanted to replicate that

we can actually replicate that

using the model builder tool

so let's continue

so we go back to our geometry

we have for its other things

we have depth the points

we have point cloud generator

the point cloud generator is basically what it

what it says

it will literally create a point cloud

based upon the information that you're providing it

your camera information you can

you can mask out areas

so basically

you're creating point cloud information on that

you're able to then utilize point cloud information

to be able to

drop various

uh geometry

into the scene

you could actually if

if you went back

for instance

if we go back over here

if to the camera tracker node

you can see all these points

so you can actually select some of these points

and if you right click on those points

you can actually create a cube

cylinder sphere

card access

you can create a ground

you can set the ground plane

to those points

and the cool thing about that is then

if you're replicating a scene it

it allows you to quickly and efficiently

build out your scene

based upon the shot

in this instance

we aren't really needing that

needing to do that

but with the various point

the tracking points

then you have your point cloud data

which you could do

the exact same thing

where you could select let's say

let's say those

those points right there

and then you can create uh

and and snap to that

your various planes

that are based upon that

and the point cloud data

obviously is just very valuable

in that you're able to visibly

be able to place things

into a 3D space

using the point cloud data

to allow you to

get a rough idea

of where things are located

in that 3D space

based upon your live action

seen or setting

so anyway so

that's just a quick

brief description

and overview

of some of the 3D geometry tools

that are available to us

there's a few others in there but again

some are gonna be used more often than others and

but when you know

the appropriate time comes

the right tool

available at the right time

is always the most powerful tool to utilize

so making yourself

aware of each of the

of the available

geometric shapes

and tools for creating geometry in nuke

is a very important

and useful setup

okay so now that we've discussed that

I'd like to actually go back

and start to begin

building our

building so

what we have

are two cards here

I'm going to select

the one card

and what we're going to do is view

in the scene here

and what we need to do is

we need to select

our point cloud data

cause I'd like to also

utilize that

point cloud data

just give me an idea

where things are

are currently at

in the scene

so then we have our card

I'm gonna just

reselect that

so it's primary up there

and what we wanna do is

we wanna actually move it

so we we need to

we need to shift it

over in space

so you can just

grab those 3D controls

and you can

move it over

in 3D space

and what I'm going to do

is we need to

scale it so

there's a few ways

you could scale it

you can either

scale it in

your viewer

or you can scale it over here

in the controls

I'm gonna actually

scale it over here

in the controls

just cause it's a quicker

and easier setting uh

for me to do

but first what I wanna do is

I wanna actually

set the rows

and columns

to a lower number

we don't need that high

it's it's just

will create

just a tiny

bit more amount of

hardware uh

memory usage

on your computer

so just drop that down

I'm gonna say

a 2 by 2 row

column will

do the job and

what you can see

actually is

check that out

you actually can see

the building

already being projected

in 3D space

which is kind of cool

now what we're going to do

let's actually

let's put that

back up tubes

apologies 8 by 8

you know what

no I think 2 by

2 should be fine

we could probably

just do 1 by 1

it wouldn't be a big deal

in this case

but for what we're doing

I think this will work

just fine okay

so there's your

your plane again

and let us drop

the scale down

so we're going to

scale this to point five

and I think

that should

well you know

let's drop that

to point two

point three

alright and the height

let's just drop that down

to point five

that should work

okay so what we're wanting to do now is

basically I want to

you can see

in 3D space here

I want to replicate

the wall that is

on the screen

right wall of

the building

so what we're gonna do is

we're gonna

take this on

the the plane

and we're gonna

rotate it so

we're gonna

rotate on y

by about five degrees

uh let's say

about 15 degrees

now you can

see actually

the images being projected

it's actually shifting

which is fine

but the thing

I wanna do is

I'm gonna actually

move it over

because what

I wanna rotate

and project

project on is

just that one wall

so you can see

where the camera is

where our projection camera is

in relation to

that shape now

what we're going to do is

we actually need to

rotate it more

so you can actually

like I said you can

you can make

you can do controls

as well as in the

in the window

so just for reference

if you hold down

the control key

you can actually bring up

the rotational

controls for that object

so in this case

I want to rotate

on the y so

we're just gonna

rotate a little bit more

something like that

so you keep in mind we're

we're creating a

a cube so to speak

uh where we want to

just project

the information

of that one side of

the building

so I'm gonna

stop it right there

you can see

you see the

other side of

the building

and then we're gonna cut it off

right there

don't mind the tower

we're gonna

deal with that

in just a little bit

now what I'm going to do

is actually

I'm going to delete

this other card

and I'm gonna

copy and paste

so control C

and control

V reconnect

and then re

input that into

the scene now

I actually have

the other cards

so now card two

I'm going to move

and what I want to do

is I'm gonna

rotate that

so you can actually see

it's rotated

43.77 whatever

so let's just say 40 3

44 degrees um

but I'm gonna

set that to a

negative so

it's actually

basically setting it to

the right angle

and what we're gonna do now is

we're going to

shift that card

and I want to line it up

with that edge

of the building

right there

now we're not

quite lined up

we wanna get it

just in line

so basically

you're just

replicating

a right angle

of that building

right there

so get it as

close as possible

you can see

there's a slight gap

so you just

get that overlap

and now we have

our right angle of

the building

which is kind of cool

right so now

what we've now done

is we basically

set up a very

simple and easy

way to create

our 3D building

so at this point

I think what

we'll do is

a quick recap

we in this lesson

we've discussed

which types

of 3D geometry

are available

for us to utilize

when we're creating

our 3D scenes

in nuke and

in this case

we've just set

up two cards

at a basically

right angle

to each other

to be able to create

the basic shape of

our building

and our next lesson

will come back

and we'll discuss our

antenna array

and continue

building our shot