Lesson video

Hello, it's Mrs. Franzsen here.

Welcome to computing.

It's really good to see you in my lesson.

And we are going to be working on 3D models today.

Are you ready?

Then let's get started.

This lesson is called "Planning a 3D model," and by the end of this lesson, you will be able to create a plan for your own 3D model.

Let's have a look at our keywords for today.

So we've got two keywords.

I'm going to say the keyword, and then the definition.

And it's really important that you understand these keywords because they are going to be used all the way through the lesson.

So our first keyword is 3D shapes.

3D shapes are shapes with three dimensions.

That's height, width and depth.

Our second keyword is combine.

To combine is when you join or merge two or more things together.

In the first part of the lesson, you are going to analyse a 3D model.

Architects design buildings.

They can use 3D modelling software to create their designs.

This picture is an example of a design created using 3D modelling software.

Why do you think 3D modelling is useful in architecture?

Pause the video here and have a think about that.

Welcome back.

Let's look at an answer.

Laura says, "3D Modelling helps architects to create realistic visualisations.

" And Alex says, "That means the software can show what the building might look like.

" So it's helpful for predicting things.

Architects can duplicate, move and resize objects easily within the 3D modelling software and experiment with different design options.

3D modelling software makes it easier to measure more accurately.

3D modelling software lets architects find and fix issues early on before the building starts.

That means it can save some money as well.

How could 3D modelling be helpful to people in other jobs?

I want you to pause the video here and have a think about that question.

Welcome back, let's get some answers to this question.

Izzy says, "Engineers use 3D modelling to plan and test machines and vehicle designs.

" Sophia says, "Game designers use software to make characters, settings and objects in video games.

" And Alex says, "Fashion designers can use 3D modelling to design clothes and see how they look.

" So designers, engineers, across all different types of jobs and industries, use 3D modelling.

In this lesson, you will plan your own building design by combining different 3D shapes.

And there's both of our keywords there.

To help you create your own building design, it can help to first analyse other people's designs to see how they have created their models.

So analyse means to look really closely at something, to examine it.

3D designs can be simple or complicated.

Let's have a look at some examples.

We've got a house, we've also got another house, and we've got a house.

But all of these designs are quite different.

See what different shapes have been used in these models.

If you want, you could pause the video here to have a closer look.

Can you see all of the shapes that have been used to make these models?

Let's do a check here.

True or false, when you look at 3D models, you can always see the shapes they are made from?

Pause the video here and have a think about your answer.

Welcome back.

The answer is false.

Why?

The answer is false because it's not always possible to see the shapes that 3D models are made from, as some of the shapes may be hidden by others.

Well done if you got that one right.

To see all of the shapes that make up a model, click on the shapes in the model and pull them apart.

This is called exploding a model.

And I love that term because it helps me remember what it means when you need to pull a model apart to look closely, you explode the model so that all the pieces move away or fall out.

You may need to unlock the shapes to move them.

Select all the shapes and make sure the padlock, which is shown in the shape inspector, is unlocked.

Let's do a check here.

This building is definitely made up of only box, that's a cuboid, and roof, that's triangular prism shapes.

So only box and roof shapes, true or false?

Pause the video here to think about your answer.

The answer is false.

Why?

The answer is false because at first glance, the building looks like it's made from only those shapes, but you can't see what other shapes are used at the back of the building.

So different shapes may have been used at the back.

Well done if you got that one right.

Okay, it's time for you to work on your first task of the day.

The first step is to follow the links to one or more of the projects.

So I've given you three houses today to work from.

We've got House 1, House 2 and House 3.

And what I want you to do with these is I want you to click on the shapes in the models and pull them apart.

Did you remember what we called that?

We called it exploding a model.

So I want you to explode a model and then I want you to identify the shapes that have been used in that model.

It's time to go and work on this task now.

You can pause it here, and when you come back, I'll show you an example.

Welcome back.

Let's have a look at what Alex got up to.

So Alex chose the first house model and he exploded that model to pull it apart and have a good analysis of what was there.

So Alex said, "I examined the first model.

I found that the building was made up of eight cuboids," that's box shapes, "one triangular prism," that's the roof shape, "and one paraboloid for the doorknob.

" So the paraboloid is this kind of disc shape that you will find in Tinkercad.

Well done for your hard work in this task.

In the second part of the lesson, you are going to choose objects to use in a 3D model.

To gain some inspiration for your own building design, it can help to look at completed designs that other people have made.

So inspiration is like getting ideas.

Use scrap paper or a mini whiteboard to record the shapes you can see in the following buildings.

If you need to, you can pause the video here to get your resources ready.

And on the next slides, we'll be looking at some building designs together.

Okay, this is our first building design.

What 3D shapes can you see?

We've got some answers here.

Laura says, I can see four triangular faces and one square face on each pyramid.

Alex said, "The pyramids are 3D shapes called square-based pyramids.

" I wonder what else you noticed in this picture?

Time for our next building now.

What shapes can you see?

Okay, let's have a look at some other people's answers here.

Izzy says that the big dome on top looks like a hemisphere shape.

That's good spotting.

And Sophia says, "The four towers look like tall cylinder shapes.

" On to the next building.

What 3D shapes can you see?

That was an interesting one there.

Sophia says, "The building looks like it's made up of lots of cylinders stacked on top of each other.

" Maybe you noticed that.

And Laura says, "I can see cone shapes at the top where it gets pointy.

" Okay, here's our last one.

What 3D shapes can you see?

Jot them down.

Right, so our final answers here, from Alex, "The houses look like cubes tilted onto one of their corners.

" That's quite an unusual shape, isn't it?

And Izzy says, "I can see triangular and rectangular faces on each side of the cube.

" Well done on working through that activity with me.

Now I want you to think about the basic shapes we have available in Tinkercad.

So here is a screenshot of those basic shapes.

We've got our placeholders at the top, the grey ones, but then going down after that, we've got all our other regular basic shapes.

What shapes will you use for your design?

Let's do a check here.

Which of these 3D shapes are available in the basic shapes panel in Tinkercad?

Is it A, B, or C?

Pause the video here to think about your answer.

Welcome back.

Let's look at the answers together.

So there are actually two shapes here that are available in the basic shapes panel.

Did you spot them?

It is A and C.

Well done if you got that one right.

The B shape, the middle shape, is not available, but you could make it in Tinkercad if you had a box shape like a cuboid and you use placeholders to make those spaces or holes in it, but it's not available in the basic shapes panel.

Well done if you've got that one right.

Before creating a design on the computer, you should sketch out your ideas first.

You will need to sketch more than one image in order to show the building from different perspectives.

So perspectives means looking at it from different sides.

Let's do a check here.

I want you to fill in the blanks.

So I'm going to read our keywords at the bottom.

We've got combine, resize, exploding and 3D shapes.

And I'm going to read the paragraph now and leave some gaps in it, and I'd like you to fill in those gaps, those blanks.

Okay.

"When we analyse a model, we look at the different, used to build it.

We can use a method called, the model to see all the shapes.

Using software tools, we can also, or move shapes and, them together to make new designs.

" You can pause the video here to fill in the blanks, and when you come back, we'll look at the answers together.

Welcome back.

Let's go through the paragraph again and fill in the blanks.

"When we analyse a model, we look at the different 3D shapes used to build it.

We can use a method called exploding the model to see all the shapes.

Using software tools, we can also resize or move shapes and combine them together to make new designs.

" Well done on all your effort in that check.

Okay, it is time for your second task of the lesson.

So in this task, you are going to be sketching the shapes that you will use to make each part of your building.

You need to make sure that your shapes are all in proportion.

Proportion means they are all in the correct size compared to one another.

So your building isn't gonna have a massive door and a tiny window.

And you also need to make sure that all of your shapes are shown in the sketch.

You may need to draw your design from multiple perspectives so that you can make sure all of the shapes are shown in that sketch.

You can pause the video here to work on that, and when you come back, I'll show you an example.

Welcome back, I hope you enjoyed really concentrating and focusing on your design to make it really as good as it can be.

We're going to look at an example now of what Alex has drawn.

He has drawn two sketches.

So this is the first sketch.

This is going to be the front of his building.

You can see he's labelled the different shapes in his design.

So we've got a cylinder, that's the chimney, a cuboid box shape for the main part of the building.

Then we've got some placeholders there, and do you see the sort of striped grey lines?

That's what he's used to signify that these are going to be placeholders.

So the cuboid placeholders are gonna be for the windows and the door.

And then he's got a sphere shape for his doorknob in the front.

And then for his second sketch, the back of this building, you can see it's from a different perspective now because the chimney cylinder has moved over and the windows are different at the back of the model.

So we've got the cylinder labelled, we've got the placeholders again for the cuboids.

There's an extra cuboid here at the back.

And he's got a spare doorknob there as well.

Well done for all of your excellent effort in this task.

Right, we've worked really hard today in this "Planning a 3D Model," and we've come to the end of the lesson.

So I'm going to summarise our learning for us today.

Computer-based 3D design is used in architecture to plan buildings.

3D models of buildings are created by combining 3D shapes.

In 3D models, designs can be viewed from different perspectives.

In 3D models, objects can be easily combined, moved and resized.

It's been really good working with you today and I hope to see you again soon.