Welcome to PJ Chen Design. An Youtube subscriber Narae wrote me an email asking if I can show you guys this type
of a form, so I decided to talk about those four different forms here. They are all
done by simply only use the "twist" command and also some of them have polar array. Are you ready? Let's get started Let's start the first one with this
start. We are going to the polygon tool, and you have polygon- start. Let's hit
ENTER and then we want to have something simple, so let's set the number of
side to 5, and we will come up something like this, and moving in then
how you get the star to make our form look more smoother, we can going for the
fillet corners, and we are gonna pick up the curve we want to fillet and type
the radius I think 1.5 is fine. So now we have that first one, all we
need to do is make it into the solid, so Let's stay with the perspective view.
Let's click on the curve, and we go into the "solid extruded planar curve". Let's go
up about 10. Let's use the twist command. Let's go to the twist and we select the
object, we hit "0" as our first point. For the rotating axis, and we're gonna go
up anywhere above the object, then we're going to the top view, click on anywhere.
And you can rotate it into any degree that you want. I'm here just rotating 90
degree, so this is the shape that we get so let's go ahead to set up the bottom
one for curve. there are two way you can make it. First of all, again, you can use the
star and this time we need to have more polygons, so let's use 12, and coming back
in like this. Now this is our top view, we also want to make sure it is rounded all
the way. So we're gonna use exactly the same command go into the curve tool .you
have "Fillet Corners". Let's pick up one. A lot of time, you're gonna end up with one that
is not fillets. You just need to go back and use the same radius "1" to do
the fillet. Alright so we're gonna do the comparison. Let's put this one on the
side to compare the curve. The second curve what I'm going to do is instead of
using the polygon like what we have here, we're going to use the curve tool and
I'm going to turn on the GridSnap approximately snapping about right there
okay then I'm going to use the command is "Polar Array", let's array with the
center, and we're gonna do the same number for 12, so that's how you get this.
After you get this, then you can trim everything inside, So I'm gonna trim all
of those. and then join them together, then I'm
going to use the the same command we use before for the corner, and this time we
want to do the fillet for 0.5, so that's how you get this. Notice that those two form
is really similar it's just like one of it is the same radius on all the corners.
this one is you keep the original round shape and by adding the smaller radius
here. okay, both of them will work, I'm going to use the second one over there.
Using the curve tool, snapping into the quadrant here, and coming up to my front
view. From the front view I'm going to create an arc, and this arc will be our
shape over there, you can turn on a GridSnap and then you can snapping into the
grid, and you can changing the curve to find what is the best for you. I do want
to have some sort of like puffy looking form. So now I get this one here
to creating this surface, we're going to use the command is under the surface and
then you have the rail revolve. This is going to be a profile and this is going
to be our rail, and we're going to starting from here, and ending, let's
going down here, and then we'll get this surface right there. Now we have the
surface, the only thing we need to do is to twist it. So let's go ahead to select
the object, and we want snapping into the endpoint coming down here, and we go back
to the top view to twist about 90 degree. So that's how we get the
second form. It looks like decoration on the cake. Now let's take a look on the
third form. The third one is most like getting a bunch of the rope together, so
you kind of guessing if you can make one and then you can "Polar Array".
You can make bunch of them, so let's talk about how do we make that one. We're
gonna go to the top view and we are going to create a sphere first. Let's go
ahead to create a sphere like this way. Okay
and then I would like to look at all four view. Let's go to the curve tool, and
we have this called "spiral" and I want a flat spiral, so let's pick a Center,
and it will be "0" point, or you can click it at the end point, then I'm going
to snapping into the quadrant, and coming back for a turn.
Now you can change it, if you feel like 1.5 is not enough. you
can change to two or three or whichever worked for you. You might need to try and
see which one worked the best. Now we have something like this, we need to
have that curve project to the surface that we have. Okay and then since we only
need the top, we don't need the bottom, I'm going to split with the point right
at this quadrant. So we cannot delete the rest of it, and also we're
gonna hide the original curve now. Let's pipe this guy. I'm going to pipe
it with the diameter 4.5 and that's how I get this shape. The rest
is the polar array, so we're gonna do the polar array, we're gonna make it a little
bit more than what we want to get that density, so let me try 25 and see what is
turnout, so it turned out to be like this it might be a little bit dense, but you
get what I mean here okay. The very last one that we wanted to talk
about is this wire construction here. This wire construction is really similar
way that we work before, as you can see there must be piping something go on.
The only difference between this one and this one, is this one will pipe first then
polar array. This one probably done polar array or something. The form is already
done, and we twist it. Okay so let's take a look how I get this more like a cage
looking shape. Again we will need a sphere first, so we're gonna go ahead to
create sphere a roughly similar size like what we had, and I'm going to... since
we're gonna have a half of them, so I cannot draw a line right there, and use
the line to trim the bottom half. now I trim it. Let's take a look on this
shape. So if we try to turn on a control point, they are not much to
turn on over there, so what I'm going to do is to rebuild this one, and we want to
rebuild into a lot more point and you kind of see that this is some ghost
things underneath there, and that's okay it's because Rhino will remember the
shape with a history for what was it. Then let's go ahead to change to 20, 12.
and then we click OK So now we have this form here, what we
wanted to do is we're gonna use the curve tool, and then you have curve from
the object, and then you have this wireframe, that means all the lines that
you see as an Isocurve. It's going to turning into a curve I'm going to select
all the curve and we are going to use the pipe tool and let's make it a little
bit smaller so point to five and that's how we get the shape here. Let's use the
twist command, Let's pick up the object ENTER and the starting twist. I'm going
to hit "0" and moving my mouse above the object, and then I wanna do
a 90-degree twist, so that is how we get this form. Let me know if you have other
form that is interesting that you would like to see. A lot of time I cannot make
exactly the same due to it has a copyright, but it is an educational
channel. I would like to show you there's something closed, or discuss these
surfers and how to make it. Hopefully that will help you a lot on your Rhino
modeling skills. Leave the comment below let me know what you think or if you
have other questions. I'll see you next
