hello everyone welcome back to PJ Chen Design channel
In today's tutorial I
would like to show you how to build this
Celtic knot (ring). It has been very popular
theme in the jewelry design and let's
built the part first and turned them
into the ring band. Are you ready? Let's get started.
if you go to Google and type a Celtic
knot you have a lot of those image. let's
started this a little bit. Basically, it's
a triangle structure and within the
triangle you kind of see the arcs. They
cross to each others, so I'm going to put
this just on the side for the reference
and we're gonna starting with the
triangle. So let's go into the polygon
tool, and then hit enter. that's the zero
point that we have as the center. I'm going
to go to the number of the size, set it
for 3, and you can decide what
size you like to have roughly. I just gonna
have something like this. Holding my
SHIFT, so that will be 90 degree to
the construction plane. Okay now make
sure that your OSnap is on, your
midpoints is on, because we are going to
create an arc by using the midpoint to
creating arc there. The same thing
you're going to notice that midpoint
while you have the arc pass, it pass exactly
in the at the midpoint there. So we kind
of getting the structure like this, and
this is what we are going to use. I draw
all 3 of them, but in fact we just
need two of them. so I'm going to create
a couple more layer, and change them into
different color. It is just
easier for you to see. It's actually not
gonna be too much a different for me, but
it's easier for you to see. So we have
one line there. it's gonna be red color. And one there.
It's going to be blue color for
example, alright so it's easier for you
to see what is what that I'm talking
about. Alright so now I'm going to
creating the surface right there, as we
need some sort of a thickness right
there, so the way I'm going to do is I'm
going to creating the profile, so let's
say I'm gonna use the rectangle and
we're gonna go into snipping at three
points. First point I'm going to snapping
into there, and then I'm going to decide
to thickness for maybe for 2mm
there, and then once I type it 2 . I
want to snipping into that point and
then I want to go into the right view.
and type it 2 as well, so I basically,
want to have a square that is
totally align to the edge of my triangle.
okay then that is the beginning, and what
is the ending is going to be? I'm just
simply just going to copy one there
let's go ahead to use the "sweep one rail"
this blue line will be our rail, and this
and this will be our cross section. Just
need to make sure that all the
line is a line (single line) so that way you will have
a very nice sweep. Okay alright so
imagine that I have this one and it's
going to be rotated with a copy=yes
and then let's hit zero, and we want to
rotate from this point to that point, so
you kind of get an idea of how they will
work. However, if we studied this a
little bit, you're going to notice, let's
take a look on the top view, you're gonna
notice at this spot it going down, and
when they meet another edge, it coming up
so in fact, we will need another cross-section right at this spot
okay so let's going to
helping us to to get more cross-section right there
The way I'm going to do is I'm going
to draw surface, and it can be anywhere
that's fine as long as it is big enough
and with that surface I'm going to
rotate it roughly like this, and close to
this spot okay. Actually, I need to go
like this way, and close to this spot
right there. I will need another one and
then I'm going to turn around to follow
my isocurve, and I will have another
spot about right there. okay and then so
what I like to do is do the curve, you
have curve from the object, and then you
have intersect
so I'm going to pick up this surface,
this surface, and this surface, and that
is going to creating the curve for me
and then while it's chosen, I want to go
ahead and join them. Okay alright, so
let's remove this, remove this, and we can
actually remove those. Alright so now I
have those two curves, and I'm going to
use the Gumball to move this one down about
-0.7 and with this one I'm
going to move it up 0.7. Alright, so
if we sweep again we should get
something like going down here, going up
there, and back to the point there.
Alright, so let's give it a try. We are
going surface- sweep one rail again. The
blue line cross section, all of them, and
this one, and this one, and then very
quickly you see everybody is aligned.
Then you hit ENTER.
and let's do another test here. I have
that poly surface, if I go to rotate. Type
zero is the center, and I'm going to
move from here to here, and rotating here
to here, and copy=yes, and let's
take a look on that. Alright, so it does
follow our wish to go down and going up
and take a look and see if that is what
you're looking for, and if this angle is
what you like. Okay so if we copy another
one, you should you know be done but when
we zoom in to look at this spot, the spot
doesn't look good, right?
so you do want them to be you know kind
of coming all together really nicely.
So what I like to do now is instead of
working with the end curve right there, I
do want to have one. Let's go to three
point coming here and here, and coming in
somewhere in the intersection, somewhere
there. Okay then I'm going to delete iall
my surfaces, and the reason I'm showing
you this, is just wanted to show you my
thinking process, so I'm repeating a lot
of things but just want you to follow my
thinking process, so if you having other
shape and it will be easier for you to
manipulate it. Okay so bear with me, that
I'm doing the same thing over and over
but just want to share with you my
thinking process. Okay now I rotate that
one over there. We no longer need this
profile and the reason we need to do
this way is because when they
meet or edges together, they we were able
to boolean, and they will be flush (to each others) okay so
let's do one more time, surface- sweep one
blue line is our curve going from you
you, to you, to you. Okay so now everybody
make sure they are aligned.
And they all facing the same direction
okay so now we have this guy right here
okay let's give it a try. We want to do
from the top view, and then let's go
ahead to rotate. Make sure the zero is
our center, copy=yes, and we want to
do from here, to here, to here, oops one
more from here to here. Okay so now this
is how we get this, if you just go ahead
and join them. Then you will have some
sort of the intersection. The way I do
it is actually.... I should have
CAP them at the beginning. I'm
just gonna go ahead to cap all of them
now so each of them is individual
solid polysurface. Now I can do as I
can boolean them. Okay so now they become
one single solid (model) okay. At the same time I
would like to give them a little bit fillet
the edges so. Let's try a small number
Let's say 0.2 and give it a try.
So it worked really well there.
double check before you turn in
in through anything else we want to pick
up the polysurface go to the
property it says closed
solid polysurface which is great
alright so now we have our component we
need to create it into a ring, so let's
go ahead to do the ring size like every
of my tutorial. I want to set it the
diameter for 16. Alright so now this is
my ring size, and of course I'm make it
huge, Alright so I'm going to make it
smaller something like this then move it
to this side, and we no longer need those
curves but I usually don't delete any of
my curve. I will just hide it there, okay.
Now we no longer need this one too.
Let's go ahead to make a thickness so go
to the surface we want to extrude a
curved straight and roughly about like this
height, as long so you can cover it.
this is just for reference, so it doesn't
you don't have to worry about the width
the width is actually it depends on our
pattern, so let's go ahead to curve-curve
from the object, and we have create UV curve
then this is the area that we are
going to do the design. I'm going to
simply moving that and align both of
them horizontally in the center, so that
way you know they are right in the
center. okay I'm going to copy another
one there, and then rotate it 180 degree
right there, and move this guy back and
because they are going to be boolean
together so make sure that they are
intersected, alright. Now I have those,
Let's enlarge the top view, and I need to
fill up the rest of this (area), so I'm going to
use the array tool, set up the number
more than what I need, probably seven set
and I'm going from here to holding the
SHIFT and try to get it close to our
first set there. Okay so now I have all
those extra, and I can trim them off. Okay
so now if I go ahead to flow this guy, I
may have the gap in between, so you kind
of need to reconsider the size, and also
depends on what is your ring size. in
this tutorial I'm just going to scale it
down just a little bit so that way.
they will be stretched or
jammed together a little bit, but that
will be fine, because it will be the ring
band, and it will be hard to tell.
okay so now I have this. Make sure they
are sitting on the surface right there is
just a little bit touching the bottom of
my pattern. Okay now let's go to the
perspective, enlarger it. It's easier for you
to see. the command we are going to use
is "flow along the surface" make sure you
"record the history" first, and then flow
along this surface. Let's pick up
everybody there, pick up one of the
corner, and pick up one of the corner
right there, alright. So we do see a
little bit gap there. The way to correct
it is actually since we have a record
history, I'm going to slightly make that
base surface a little bit closer, so the
computer will automatically adjust it.
and since it has a lot of things to
calculate it so you were a little bit
slower. Look like we need to moving a
little bit more I just need them touch
so I can boolean unit
later on. Alright, perfect, so now it's working great we no longer
need this surface extrusion there, they
say we'll break the history, we no longer
able to change it but that's fine.
because we get what we want.
Alright so that is the way to making
into the ring band. The only thing left
is the boolean unit. I hope you enjoy the
video, please like and comment to help my
ranking on the YouTube, so lot more
people were able to see my video, and I
hope they will enjoy like you do, so
please like and comment, and I will see
you next Monday, Thank you