Hello everyone welcome back to PJ Chen Design Channel
We have a very interesting request from YouTube subscriber asking how to build
this form. Although I don't build it exactly the same but I think it's a good
example to talk about the surface editing. Are you ready, let's get started!
An email from Werner Schmidt a couple days ago wanted to know how to build
this surfers. Although I don't know what it is, but it's really interesting form.
If you see this video Werner, please let me know what it is. Typing in the comment.
I think a lot of people wanted to know. There's a lot of detail I won't cover
like this is like a gear type of texture right here. and few cut here, but
we're gonna talk about the general surface, and how we get this surface here.
First of all, let's go to the command bar type in "picture" in Rhino 6 and for
Renault 5 you need to type a "picture frame" and we're gonna pick up this image
right here. We're gonna bring in the image for whatever size. Since I don't
have a size reference here, I would like to move this guy with this point
and type at 0 to align with the center, and I can move it down a little bit. It's
always keeping a good habit and have everything in the center, and let's lock
this picture. Let's started this with tracing, so we are going to trace as
close as we can. I'm going to fast forward so you don't have to see me like
doing this in a slow motion
You kind of noticed that I didn't race exactly on some of a really tight
area it's because this tight area. It may affect the way I create the surface
and we can always drag the control point later on, so I just want to get
something really close at this point, and we don't have to be like follow exactly
on some tight area. So this looked good to me, and ready to go. Then we will need
to start building the cross section, so I'm going to look at all four view at
this point, we are going to making the cross section by using the arc tool. I'm
going to snapping somewhere here in the quadrant, and somewhere here at the end.
Coming to the right view to draw our first curve. And we can adjust
the curve later on. So don't worry about if it is too tall at this point. We just
need to get all the cross section in place.
so now we get something like this, and it depends on how tall you wanted to have.
Maybe they are all too tall so we gonna turn on the control point and
I'm going to lower this down and lower this down, and this kind of gradually
changing the high for all three of them. So now I have something like this. Okay
the other one that we may want to have is something cross over here, because you
see this is a bump coming up and maybe somewhere will be a little bit lower, so
I'm going to have the profile is gonna go like the arc from this point to that
point and going like this, and again if it is is too high then you want to come
in down here. Right at here look like it's going inside and coming up
again so we might need to change this profile depends on how it look. Let's
draw something on this side. something like this and it was going a
little bit lower and going in like this, and coming up with a bigger bump.
and then we can adjust it a little bit and see if that fit well. In fact,
I'm actually going to try both of for shape just for your comparison. We are
going to have the command for the "orient 2 point" and we make sure we want no
copy, and the scale we want a 3D scale. so we want to go this is reference 1,
reference 2, go with this point and this point.So I'm going to turning
that into the red color just for the comparison. We want to see what's the
difference. Okay and we want to do the sweep 2. so let's go ahead to use the
split command, and we want to split with the point. The first point. It's going to
be the very end right here. On the bottom the under quadrant, the second one we
want to do somewhere over here on the top, so now we split this into two curves.
okay we're going to starting with the "sweep 2 rail", rail 1, rail 2, and
we're gonna starting with this point right here, so make sure snapping into
the end point, this cross section, go all the way, and don't forget to come back
with the point over there. Alright, so you get something like this for our first
set, and I'm going to temporary to hide this one. We're gonna do the comparison
with this exactly the same command. Let's go into the "surface- sweep 2 rail", rail 1,
rail 2, going to the point and then cross section on all 4 of them, and
coming back with the point, one more time. Alright so then we get something like
this. By comparison, you can kind of compare and see which
one will fit your design better. If this is a too much of a jump in here, you
might want to get it back by putting another arc here. So play
around and see which form will fit it better. I'm going to stick with the first
one here. Okay so now we need to go into this detail. The this detail, like right
at this corner, it's not exactly fit into our drawing, so we need to change it a
little bit by turning on the control point. When we turn on the control point
if we drag here, you're going to see the whole row is dragging as well. So
to have a better control we need to make sure that it's the point we want to
drag and we don't want to drag all over on the other side. So we need
more control point in between this point and this point. So let's go
ahead to use the "rebuild", and we want to rebuild this guy so far on the V, which
is the x-axis, you only have like five points, so we want to do ten points, and
right here on the top it has two hundred something point let's change it to a
little bit smaller numbers I say 150, and we can preview over here.
So look like we having additional Isocurve right here, that will help our
control. Maybe we don't need that many. let's say eight, and this is a
good point there that it look like it every place we want to moving it has
some sort of control point over there. So let's click ok over there.
so now we are looking at the top view and let's go ahead to make them closer
to what we have to the original drawing and then you kind of need to tweak it back
and forth until you find the shape that you like, and the fitting into your
design 100%. so we are going to take it a little bit like this
and this might need to go in like all of those might need to go in a little bit
something like this, and something like this. Alright so you get what I
mean here, so you kind of need to play a little bit to see what's the best
fit for it. So we kind of drag and play alright so I'm gonna stop it right
here for the demonstration. I'll show you the rest of the part, but you get what I
mean for what you need to do, and then some of pars, you can tweak it higher or
lower or things like that. okay the second things we wanted to do. I
don't know if it is flat on the bottom I will just assume it's flat, so I'm going
to use the "Cap" command to cap it so once we cap it, I'm going to punch two holes
there. Let's start drawing from the top view and we want to draw a circle
roughly the same with the size that we have over there. We want to go to the top
view, and let's use the "trim" command to trim off this and all of a sudden
everything is being trimmed off. If this happened to you don't worry about it.
that's that's probably because it's not intersect. So to fix these thing.
Let's go straight and instead of using the curve we want to using the surface
and to trim off this surface, so that trim of here, trim off here, and the
surface behind, and then let's delete those. Alright, so now we have this we're
going to hide the background and then now we have this over here to close this.
You can use the "Loft" command to go from here this edge to this edge. Sometimes, I
would like to do is using the "BlendSrf" command. I want to blend here to here
and with this dialog, I want them to go a little bit like not as pronounced, so I
will have much nicer blend for the holes looking
things there, and the same thing is going to happen right here. So that's use the
blend command. Again, moving this bar all the way down, just having a
little curve there. and don't forget to join all of them. Alright so then we will
have something like this, and again right here that you have those like spiky or
the gear looking texture, you can prepare your cutting tool to cut them down but
basically that's how you get this form. I hope you enjoyed. Please like and comment
and share my video. so I can reach more people like you, who want to learn Rhino.
and have fun together. Don't forget to click that little bell. I will
see you next!