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in this lesson will discuss how we can create new forms from our polygons by
using the extrude tool
alright so
in the lasso so we had created the major for me and we had gotten into
how to create segments across our object and the different ways that we can
create segments
so now what we want to do is we want to start
to create different forms of this so
for our example what we want to do is we want to create the truck mounts here
now we're only worried about this specific portion
right here the rectangular portion we're not worried about these triangles that
are coming off the edges there
there's a different way of dealing with those alright so let's go ahead and
minimize this am 16 true that polygon now
so it's important to remember that you want to prepare your polygons before you
extrude
so one thing that at tends to
paratroop someone up who is still unclear about segments and how polygons
work exactly
is we have the shape that we want here
but we don't exactly have all the segments that we need so if I were to
come in and use the extra tool
so I can use it by activating it and then left clicking and dragging on this
polygon I can pull that out
and you'll see that it comes all the way out but that doesn't matter concept here
King so looking at our concept
you can see that it's being extruded out from this corner
to this corner so what happened exactly well we have the segments to go across
the top
and we have this segment to go across the bottom we don't have the segments
that go across the front
and the back so we need to
finish preparing that polygon so
let's go ahead and turn off extrude and we're gonna undue
I let's just do one time there
and now what we want to do is we want to create the segments across the front and
a back up to have so
the tool that we can use for this found can my suggestion would be to use the
slice plane
so the slice plan let's go ahead and have
rotated around and let's go ahead and
routine at 90 degrees cancel its good her front view beheading F
you'll see that it's kinda of here it's not exactly matching up
with our angle properly so let's go to local
on that rotation and we can actually type in the value here
along the bottom so a 70 and that will go back to
its original position now let's go ahead and
rotated ninety degrees K
so you'll see that it straight up and down and I can go ahead and move this
across
can let me turn on her text mode so we can see
a preview that slice playing so let's try one more time
ever you know am critical ran across the front here
you're right about here read hits slice to make that segment
and really go across the back to you
read about here you will hit slice again so now for hippie on the keyboard my
perspective you
I've created that polygon on this site now
one important thing to remember is that we need to be building on this site as
well
so don't forget about that so now let's go to poly on mood
and select those two polygons
on each side never going to extrude those out
so let's go ahead and hit extrude
anybody use the settings this time because I have to defer polygons
that are being used and I'm going to extrude us out and let's go to
c5 undervalued here me and we'll go up a little bit higher think
so good about hmm
safe let's say six of wanted to be a little larger
now in this case we might have a couple
issues I with the overall size and those
those pieces there I don't think they're quite tall enough and I don't think
they're quite long enough you're so
once we start building in some of these different forms
you'll see that I'm if we don't get those polygons prepared properly
at the very beginning it can be difficult
to you and and it now for
now it's not impossible its definitely doable
we can definitely work with it just makes things a little bit harder and the
more details you guess he could definitely see why
we say work too large to small when using marks modeling methods
so too change the shape in this let's go to per text mode
and I'm going to select the vertices right across the bottom
have this and you see the use that region selection
to select all those vertices in that line you know but it Ralph
that down make that a little bit taller their
actually lets for back up just a little bit the man idk a little too much
and we want to LinkedIn account back here
now looking at that
let's go ahead and pull that back now one thing that I want you to notice
is that work from tearing up the top edge I love
our dumpster and that could be an issue so
if we pull that out where we push that and you can see that it's
and changing the topology across the top
now it's perfectly fine down here because those lines are perfectly
straight across
in the world access because this is that a diagonal angle that could be a little
bit of an issue
so make sure you hit undo or controls the a couple times to get back to that
original position
now in order to you get past this problem
what we can do is constrained the subjects
to a specific and subject itself so in this case
I want to constrain these vertices along the edge
so under my energy on to roll out I have constraints
if I turn on edge and I moved these vertices
notice what happens they begin to move out
and across the top it staying perfectly in line that apology
and the one issue that I have here is that I have some polygons
that are not wanting to come across and that's because they've around a room
on the edge so this may not always work
but I'm giving you a good idea when this guys going to be appropriate
so let's turn off are constraints let sit down and let's decide like these at
the top something to hold on alt
and then diesel like those I'm gonna move these back
just a little bit Kane
and then writing these at the top and the switch those constraints
to edge an important across and we'll try to get that as straight as possible
now if I go to my front view by hitting a half I can select that entire line %uh
vertices
and i cant insured that that's going to be perfectly straight
by using the make planner tool now make plainer
is a great way to clean up your your segments
now the direction that we want to clean this up is going to be an Rx
direction now again we want to make sure
that we have our edge constraint on because even if I
I'm him a cleaner in my ex direction
it could at adjust that apology we don't want that
someone hit X and make cleaner
and we were pretty close to begin with so I think we're good here
so now that we have those perfectly straight we've got everything set up
got the but right now it's ready and we've extruded an apt
now let's talk about how to extrude account the topic rim
the dumpster first thing that we need to do is create the segments
across their now one way that we can go about doing this
he is by going to edge mode selecting this image
and hitting reading we could use connect to create a segment that goes across the
top
so to do this go ahead we'll hit connect
and then we can you slide to push that further
for closer to the top there to lose something
like so but one thing that I want you to notice is it's pretty close to this
image
but it's a different distance from this said appear
and that's not something I really want so what I could do
is go ahead and just hit okay on that and if I go to my front view by hitting
F
you definitely see that distance change their
what I could do is rotate those edges
and with constraints still turned on
I can even after so let me changes from local
to you amorous rotated around
as I rotate at those houses moving that edge
across that party now it's snapping its not given me the exact angle that I need
someone to turn off my angle snap
en route eat at around in trying to get the exact angle
I need their so this is very very close
and I like the distance from here to hear so I know that that's pretty even
now if I want to I could pull it up a little bit closer
so that way I don't have quite as much room there cross atop my dumpster
alright so now I have these edges now what I need to do is a need to create
the lip
of that that Dempster there
so I could come and go to poly on Mon
and I could select the polygons all the way around
cake and i can text read those out so let's go ahead and select all those
and let'*** extrude now let's make sure that we use the extra
settings and one thing that I want you to notice
is the overall extrusion and it has an extra properly
you know this is kinda Kenny into the model in
almost all the directions except for this direction here
and it's not giving us the best results so what is happening here
well we are extruded ng with multiple polygons
and it whenever we're extruding with multiple polygons
we need to make sure that we're paying attention to her extrusion type
right now are stringent I percent to group
if I click on this you can see that can choose from group
local normal m by Polycom these will all affect how your
objects extrude so if I go to local normal
you notice that the extruder out in their own local normal direction
and this is getting us closer to what we want
now %uh to kinda just finished this office take a look at my polygon and see
what that does
this will separate the polygons an extra dose Street Apt
K now these are not group together
and so if you want to be careful when using this
and this is extremely helpful if you want to create something like
I'm you have multiple polygons that are
together you like recent kinda like a a spike the ball or something like that
I'm but anyway looking at this
local normal was pretty close to what we wanted
k keeps things group together an extra so down in their home local direction
but the problem with this is you notice that it's not keeping those
angles that we want for our RAM we take a look at our front view you can see
that's kinda
extreme comfort here and down here and that's not
exactly what we want so what do we do about this how do we get around
this problem well it's important to remember is that
the extra tools does work
pretty well in most cases but whenever we have diagonal angles like this on a
model
you can produce some unexpected results now
we can still use the extra tools to fix this issue we just have to use in a
different way
so instead of extruding everything all at the same time
how bout we extrude just specific signs
so in this case I'm gonna take this said right here
and this edge or this on i'd should sing
and 163 does straight now so if I hit
extrude settings those will extrude straight-out
they will not be influenced by the other polygons
so let me take my extrusion hunt down cameras could something
around to k we want a little bit of a lift their not
a very large lip let'*** OK on their
and now we have the ability to select all these polygons across the front
Kane as well as the back
and we can extrude those out now this is going to be a little bit trickier
because
you can see that they come straight out in both directions
now that's okay let's go ahead and hit OK on this
and we can stream these out manually so looking at her front view
you can see this come straight out what we want to do is continue with this
angle
so let's go to vertex mode enormous like just these vertices right here along the
edge
and I'm gonna pull that up now you'll notice that it's not allow me to pull
the top edge
up and the reason for that is because we still have
any constraints turned on switch that to none
and pull that up so there we have our angle there
must take this simple burning all down
alright so now we have our lip for our dumpster
and we're starting to get those larger forms
so now that we talked about how to use the extra tool
and we've we've covered pretty much everything that we could cover with the
extra tool
the I'm preparing a of polygons before you extrude
on how to you I make street does sound using the extrusion types
and what those types do exactly and how to fix any issues whenever extruding
so now what we're going to do is remove into our next section
where we're going to continue to extrude but we're going to a church in a
different way instead of
creating am shapes the *** out
let's create shapes that actually push into an object
so we'll start with that next