Hello everyone, welcome back to PJ Chen Design channel. This channel is to share
Rhino 3D knowledge to help students and 3d model professionals to learn
various Rhino techniques. Today we are going to talk about this door knock, it
may not be necessary is jewelry but the way of the twisting the shape it will be
applied to the jewelry in many other applications. Are you ready? let's get started
started
to the Pinterest and type it, like hand-forged door knocker
twisted, those kind of keywords. You will get a lot of interesting twisting. Very
traditional blacksmith technique. A lot of this is being using in the jewelry the
way it twisted is really really beautiful, so the one I particular like is this
one. this is the one I think will be a very good practice on understanding how to
manipulate the surface to get this shape. There are two way to make this twist and
We are not going to model this guy, so I'm just going to temporarily hide it.
what are two ways, the first we can use the "sweep1 rail" to create a profile
and use a sweep one rail to create the shape, and then mirror to the other side.
The other way I found it as more smooth looking is using the simply just used to
twist and flow it back to the surface so let me show you the first one and see
how I make the first one and the reason I'll choose the second one. Let's start
with the circle on the top view that's snapping the center to zero so go
to zero and for the radius let's type it "1.5""
so the diameter will be 3", so let me type it 1.5
and inch enter so we got this shape here. Alright and then we want to go to the
right view and using the square rectangular tool to
snapping the zero to the quadrant and I'm just gonna eyeball it full see how
big I will like it meanwhile holding the shift key so that
way it will be exactly square instead of rectangular. Okay, now if I'm going to
work on this one I would like to have one copy from the quadrant to duadrant
since it is going to be tapered down so the one on the top is going to be
smaller, so I'm gonna use the gumball to make it smaller
and then every time we are working with just gonna work on half of it because
it's symmetrical we can just mirror to the other side, so ideally if I'm doing
like this way I'm going to go to the surface- sweep1, go from this point
here to here, then I will have something look like this. alright so with this I'm
kind of looking how am I going to make it twist, if I have a few more control
point in between I may have a better control on that, so my trick is
going to find the curve which is bunch of a square in between and it's kind of
work with those square, so the trick I'm going to do is to creating a surface
right here, and with this surface I'm going to go to "polar array" and then
selecting this surface hit "0" for our center, and I would like to have number
I'm just guessing probably eight here. and then since we are only doing half of
it so I'm going to type it 180-degree so then I will get those surface there what
those surface is going to do is going to help us to find a curve is
exactly where it is. so I'm going through the surface I'm sorry going
through the "curve" (menu) and you have curve on the object then you have intersection
click on all the surface we probably don't need the first one, we click on all
the surface 1 2 3 4 5 6 of them we don't really need the very last one so you
kind of see their intersection curve showing there then we like we can did it
whatever the original surface is. so now those are the surface it's being evenly
out follow it you know and not only it is evenly out it is getting smaller too
so the next one we are going to use the same commands to sweep and we are
going to use this as a rail and we're gonna sweep from the first all the way
to the very bottom the very end one, okay so now you kind of see there's some sort
of arrow going on, The first profile to the second profile I'm not going to
change in the arrow because they I want them to be like smooth there I don't
want twists over there, and starting from here I'm going to move the arrow to the
next turning point, so this one is here, in this one going one more, and this one
will coming back here, alright so you kind of see I'm moving everybody
followed the almost like you can already see the twist. it's kind of following you
know the corner and click on it. so it gives us a good twist
from the top view however when I'm looking at this side view it kind of
give me a little bit kink over there that's the reason I don't
like it but it's a good way to understand you know how things is
twisting. Maybe in your case instead of twisting moving from the point to point
you can move into the midpoint, and that will be smoother okay so you can try on
those. and get a few try to get the pattern that you like. I'm going
to put this one aside just for the comparison and then I'm going to make
another one here all right so the other one I'm going to try. I'm going to first
of all they delete all of this, because we no longer need it. Okay, and then I only
need to work on half of it so on this circle I'm going to split by the point
and then you're clicking on the quadrant and the quadrant. alright, and I'm going
to delete the other half. Alright now we need to know how long is this one
what's the length. so I'm going to type it "length" on my command bar, and then I
click on this one alright. hit Enter, it show me is 1196.95
so I'm gonna creating a straight line and I gonna use
exactly the same number1196.95, alright so now we
get this curve right here. what I'm going to do next is to move this curve from
the quadrant to the endpoint and again moving this little one from quadrent to
the endpoint alright and then we are going to simply just using the loft tool
or you can use a sweep one. either one will come up exactly the same, so go to
the loft and pick up this curve and this curve, hit Enter, and then we will get
something like this. okay and we need to make sure it's solid so we want to cap
it. type it c.a.p at the comment bar then you will get
something like this. okay so the the end goal is to kind of starting with
somewhere not all the way to the end. and not all the way to the other side of the
end too. so we need to make sure our Osnap is ON, our "near" is on, okay now
let's go to use the twist command. in the twist command it
will ask you the object so we're gonna click on this taper one and then you're starting
twists, make sure you're not snapping into the end point we want to make sure
that the end point is smooth so we can copy rotate it to the other side, and we
want to go somewhere close to this end but not the end point, so use the "near"
snapping there and also use the near to snapping roughly here, then we are going
to look at the "right view". okay I'm going to hold my shift and click on the 12
o'clock position, and I gonna go counterclockwise three times, so one two
and three all right holding the shift again, and click on it so now you can see
we get this lot more smoother than the one that we had here okay
Well, this one has a character. I love this one too, but to make it almost
identical to what we wanted to do. I will prefer using the twist. okay
now that's flow this back to the curve, so the command we are going to use is
"flow along the curve", let's just type it "flow" and then it will ask you to select the
object. We're gonna pick up this object it will ask you to the base curve make
sure you pick at the near one of the end. okay so I'm gonna click it right
here, the target curve will be this end alright so that's how this one flow to
the other side, and all we need to do is have this one and mirror to the other side
make sure you're snapping into the endpoint and all we need to do is just
Boolean it, and I hope you liked the video and please comment, like and share
that really helped me my ranking on YouTube. that's also the way I can keep
making free video for you. thank you for watching I'll see you next Monday