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