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Из курса от партнера University of London

3D Models for Virtual Reality

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University of London

3D Models for Virtual Reality

97 оценки

Курс 2 из 5 — Specialization Virtual Reality

This course will begin your journey to creating Virtual Reality experiences. A Virtual Reality experience is a new world that you step into and are entirely immersed in. Creating a VR experience means creating that world and all the objects in it. In this course you will learn the basics of 3D graphics: how we create objects and how to lay them out to create an environment. You will learn techniques like materials and texturing that make your objects appear realistic. You will also learn about audio techniques to ensure that your experiences sound great as well as looking great. In all of these topics we will pay attention to the particular requirements of Virtual Reality, including pitfalls and performance issues: making sure your environment runs fast enough in VR. You will learn all of this using the professional game and VR engine, Unity3D. Unity is one of the most used game engine and is a relatively easy, but fully featured, introduction to 3D development. The course will culminate in a project in which you will create your own VR scene. VR development is something you can only learn by doing it yourself, so working on your project will be the best way to learn.

Из урока

3D Graphics

This week you will begin developing 3D Virtual Reality Environments. We will cover the basics of 3D graphics, including a number of 3D engines and development environments that you can use. We will particularly focus on the Unity3D engine.

Unity User Interface6:14

Navigating in Unity4:55

Objects and Meshes2:32

Creating Objects in Unity | Primitives5:48

Creating 3D Assets2:22

The Asset Store8:54

Importing Assets From Unity and Other Places6:17

Познакомьтесь с преподавателями

Dr Sylvia Xueni Pan
Lecturer, Department of Computing
Goldsmiths, University of London
Dr Marco Gillies
Senior Lecturer
Computing Department, Goldsmiths, University of London

[MUSIC]

Before we talk about the objects that make up our virtual world,

we have to think about the space in which these objects exist.

And this comes down to really understanding how we represent things like

objects and positions in a computer.

Everything on a computer really has to be represented as numbers.

Even something like an image, or a video,

is broken down into vast quantities of little numbers, several for each pixels.

To understand how we do that, I'd like to start not with 3D yet, but

with 2D images that make up the screen of a computer.

If you think about a computer screen, it's made up of a whole bunch of pixels.

Massive grids of pixels, rows and rows and rows of pixels but

they essentially make up a grid like the one I'm showing you now.

So how do we represent the position of a pixel as a number?

First we start at the top-left and call that pixel 0.

In fact, we call it 0,0, because as we will see in a minute, we need two numbers.

If we count how many pixels across a particular pixel is,

in this case it's 12 pixels.

And we also need to know how many pixels down it is.

It's 8 pixels.

These two numbers tell us exactly where a pixel is on a computer screen.

Just like the latitude and longitude on a map tell us where we are in the world.

We call the number of pixels across x and the number of pixels down, y.

That's just an ancient mathematical tradition.

So with the numbers x and y,

we can represent the positions of any pixel on the screen.

And that allows us to draw things at particular positions on the screen.

For example, if we want a pixel at the top right, we need a high number for

x and a low number for y.

At the bottom left, on the other hand we want a low X, and a high Y.

For the bottom right, both should be high.

We don't really need to think anymore in terms of pixels.

We can just think of x and y as distances.

They can be meters or inches.

All we need is two numbers and that gives us the position of any point in 2D space.

That's really powerful.

With two points, we can draw a line between them.

And with three lines, we can make a triangle.

We can start to make shapes so

that this is the basic building block of objects in 2D space.

In 3D, we can still think of it in exactly the same way.

The only difference is, as well as being able to go up and down and

across, we can also go in and out.

We need a third number, and we call this number unsurprisingly Z.

Thee numbers x, y and z are what represent any position in 3D space.

And you will see over and

over again, that we're using x and y and z as our basic coordinates.

So they're giving us add points.

And once we have that, we can start using x's, y's and zs to create full 3D objects.

[MUSIC]

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