All language subtitles for 613241-13 - Lines and surfaces - The definitive SKETCHUP course. From beginner to expert.en-US

Hello people, welcome
to this class in

where we're going to talk
about the main concepts

that we have to
muster in order to

understand well how
SketchUp things.

And then we will become
experts and we will be

able to do any operation,
any transformation.

We will be able to
fix any problem.

And we will enjoy
much more drawing in.

So mainly we have to take
in mind that there are

two things super-important in

a skin cell, lines and surfaces.

Here we have a 2D
drawing on a 3D model.

Both of them are based
on lines and surfaces.

So let's start with
a more simple one,

which is of course
this rectangle in 2D.

I have this woman here
for giving you the scale,

but we can perfectly delete it,

because actually a scale
right now is not important.

So as I told you, here,

we have lines and surfaces.

Actually we have
just one surface.

We know how to select them.

We want to select the line.

We can do it using our mouse and

clicking and adding more
and more lines, e.g.

that if we click
out of the drawing,

then we unselect everything.

If we want to select the
surface, here we are.

But the thing that we have
to understand is that when

we are drawing a
sketch up our scope,

our purpose is to generate

surfaces in order to
create 3D models from

the surfaces is how we are going

to use the Post poll tool to

extrude those surfaces and being

able to achieve 3D models, e.g.

here, once we have the surface,

I can use the cost pool tool,

one-click and then
we have our queue.

So imagine that we delayed

the surface and we have
just lines. In this case.

In SketchUp, we can
barely do nothing.

So we should recover the
surface that we have just lost.

In order to do that,

we better go to line
and then we can draw

or redraw over any of the
lines of this rectangle.

Then we recover that surface

and we can generate
again that 3D model.

So the lines are
containing that surface.

If this time I erased
one of the lines

instead of the surface,
e.g. this one.

What is going on?

I have lost, of course,

the line, but at the same time,

I lost the surface because

the line are the
concerns of the surface.

If I lose any of them,

then I will lose
the surface to tell

again for selecting
the line tool.

And I close again and I
recover the surface again.

Let's see how this works.

When I am working
with a 3D model.

In a 3D model, it is exactly
the same like in a 2D model,

but with high, I mean,

if I select this surface
and I delete it,

you will see that the
queue is completely empty.

Inside the queue,
we have just error.

It is not a solid figure.

So we can think about this Q as

different 2D planes pouring
all together, right?

And of course, all of
those 2D planes will work

exactly the same as
our first 2D drawing.

We saw dust before.

So here, if we wanted to
recover that surface,

we should draw any line
of its concern, right?

E.g. this one.

And once we have the surface,

we can mark it and extrude

it and play with it as we want.

Furthermore, if I
choose this time, e.g.

this line and I delighted
what is going on.

We have lost, of course,
the line selected,

but at the same time,

we lost two surfaces.

The surface on the left side,

on the surface on the
right side, right?

Why?

Because that line was holding

those two surfaces the same
as here in the 2D drawing.

When I select this
line and I delete it,

we said that this line was

holding the surface
in the 3D model.

That line was holding
knot one surface,

but two of them
according to this logic,

if I select the line and I draw

again from this point
to this end point,

I will recover both surfaces.

Here we are.

This is one of the most
interesting and fun things about

SketchUp because
if we are able to

understand these concepts
in a very deep way,

we will be able to enjoy a
lot and draw it in SketchUp

because it's not just about

the lighting and
recovering surfaces.

But e.g. if I select

this line and instead
of deleting it,

I move it using the Move tool.

Look what is going on.

That line is holding

either the surface on

the top and the
surface on the front.

So if I move e.g.

that line following the set X,

both surfaces are
changing this way.

And if I go till
the ground floor,

I could become
easily my shape into

a triangle 3D model, right?

We will go deeper
into this, Let's say,

reshape and resize figures
when we see these Move tool.

But at this very moment,

I just want you to
understand how lines,

surfaces are connected
to each other.

How lines are the concern
of the surfaces here?

How surfaces are the key
for creating 3D models.

And how those 3D models
are totally empty inside.

So we can understand
them as different to d,

draw wins joint altogether
creating that shape.

So let's finish the class here.

In the next class
we will talk about

another very important
concept in SketchUp,

as it is the groups
and components.