Introduction to Objects Interaction | Part 2

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Del curso dictado por University of London

3D Interaction Design in Virtual Reality

30 calificaciones

University of London

3D Interaction Design in Virtual Reality

30 calificaciones

Curso 3 de 5 en SpecializationVirtual Reality

This course will teach you about one of the most important aspects of VR, how you interact with a VR world. Virtual Reality is completely different from an on screen app or game. You are completely immersed in a VR world, so it doesn't make sense to interact only through buttons or menus. You will get the most out of VR if you can interact with the world just as you would with the real world: with your natural body movements. You will learn about the basic concepts and technologies of VR Interaction. You will then get hands on, learning about how to move around in VR and how to interact with the objects in your world. The course will finish with some advice from experts on VR interaction design and you will do a project where you will get real experience of developing VR Interaction.

De la lección

Interacting with Objects in VR

Welcome to Week 3! This week, we will be looking at interacting with objects in VR. We'll cover topics such as interacting with objects within reach, hyper-natural interaction, and magic interaction. We'll then move on to physics interaction, and how this works in VR.

Introduction to Objects Interaction | Part 15:51

Introduction to Objects Interaction | Part 25:01

Object Interaction Within Reach4:43

Hyper-Natural Interaction4:07

Magic Interaction6:50

Evaluation Metrics4:41

Conoce a los instructores

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

In this video, we continue discussing object interaction.

Previously, we have introduced different level of

user input you can have with different VR systems currently on the market.

With most high-end VR systems,

user's hand rotation and position,

or HR and HP, are both tracked.

The position and rotation of the pair of controllers they hold in their hands,

or CR and CP, are also tracked.

Also, those controllers normally come with

some basic 2D user interface or 2DUI such as buttons and joysticks.

Another way to look at how these VR systems support user input is

to define the tracking capacity with degree of freedom or DoF.

When the position of an object is fully tracked in a 3D space,

that is all its x,

y and z axes are tracked,

so there is no ambiguity where this object is,

we say that it is position tracked with three degree of freedom.

The same applies on rotation tracking.

When the orientation of an object is fully tracked,

that is all its rotation are tracked including pitch,

roll and yaw, we say it is rotation tracked with three degree of freedom.

And we can add to those two types of degree of freedom together.

So when an object whose position and

orientation are each tracked with three degree of freedom,

we can say that this object is tracked with six degree of freedom.

Using this method, we can describe user input in

the high-end VR system as users are hand-tracked

with six degree of freedom and we'll be holding

two controllers with simple 2DUI and are also six degree of freedom-tracked.

This is an important starting point in designing object interaction in VR.

As for most tasks in this area,

we'll be relying on a system's ability to track our hands.

Other than the controllers that come with the current standard VR systems,

there are other motion-tracking devices we can use to track our hands.

These include the Polhemus magnetic tracker and markerless systems such as Leapmotion.

There are also several VR gloves currently on the market.

Both the Leapmotion and the VR gloves tracks not only the hands but also

detailed finger movements which enables

more expressive ways to interact with objects like we do in real life.

The VR gloves normally also come with some built-in device for force feedback,

which could be used to produce effects similar to

the vibration feedback generated by the VIVE controllers.

There are many other types of

tracking and force feedback devices out there on the market,

and we should see many more coming soon.

However, before any of them become an integrated part of a popular VR system,

it might not be a good idea to design

specific object interactions relying on any of these devices,

as this way, you will risk losing

the mass market where majority of users do not have access to them.

Let's take a look at how user input and system feedback are used

in one of the basic object interaction tasks, object selection.

When selecting an object,

the user should first be able to indicate the object of

interest by either touching it with their hands,

or if the object is out of reach,

by pointing at it.

But this is surely not enough as even in real life,

we often touch and point at objects accidentally without intention to interact with it.

So the user should be able to confirm their selection by pressing

a button or they can also use their voice to confirm.

Finally, as in real world when we grasp an object,

we would expect to feel it.

System should provide some kind of feedback

ideally in the format of haptic feedback such as vibration.

But if that's not possible,

you can use change of color or sound.

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