1597862100

# Advanced Flutter: Matrix4 And Perspective Transformations

One of the most powerful widgets in the Flutter catalog (and for me, one of the most underrated) is the Transform widget. Transform widgets allow us to fundamentally alter how widgets look and behave, allowing us to create new, complex types of animations. Underneath the Transform widget, a 4D matrix powers the actual transformation — defined by the Matrix4 class. While Flutter provides easy ways to do transformations such as translation, scaling, and rotation, we can use the Matrix4 to create even more awesome things such as 3D perspective transformation.

In this article, we are going to explore the 4D matrix itself and what the individual values in it do. In the previous Transform Deep Dive I wrote, we discussed how to use Transforms without directly interacting with a 4D matrix. Check it out if you need a refresher on the easier uses of the widget.

#### What is a 4D matrix?

Even though anything with “4D” attached to it sounds cool by default, in reality, a 4D matrix is simply a matrix with 4 rows and 4 columns. We need to use a 4D matrix to transform an object in 3 dimensions (Here, the dimensions are what we’re used to: length, breadth and height).

Identity Matrix

This formation of the matrix is called an identity matrix. The best way to think of an identity matrix is that this is the equivalent of the number ‘1’ in the matrix form — It leaves things untouched when used to transform widgets.

Using different combinations of numbers in this matrix, we can manipulate the shape, size, orientation, etc of a given object.

Let’s look at how we do this.

#### Basic Setup

Let’s take a look at the code that we are going to use for experimentation:

``````class MyHomePage extends StatefulWidget {
@override
_MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {

double x = 0;
double y = 0;
double z = 0;

@override
Widget build(BuildContext context) {
return Scaffold(
body: Center(
child: Transform(
transform: Matrix4(
1,0,0,0,
0,1,0,0,
0,0,1,0,
0,0,0,1,
)..rotateX(x)..rotateY(y)..rotateZ(z),
alignment: FractionalOffset.center,
child: GestureDetector(
onPanUpdate: (details) {
setState(() {
y = y - details.delta.dx / 100;
x = x + details.delta.dy / 100;
});
},
child: Container(
color: Colors.red,
height: 200.0,
width: 200.0,
),
),
),
),
);
}
}
``````

The code simply uses a Transform widget and a colored Container to transform. We define an identity Matrix4 for the starting point which does… well… nothing at all. The rest of the code with the GestureDectector allows us to rotate the square in X and Y directions. The code for rotating the square is final and we do not intend to make any changes to it. If you need more information on what we’re doing, I suggest looking at Wm Leler‘s article on Perspective in Flutter where a similar method is used. The x, y, and z variables simply track the amount of rotation that has already been done.

We will come back to why we’re allowing the user to rotate the square later, for now, we focus on the matrix and basic 2D results.

Note 1: The line

alignment: FractionalOffset.center,

sets the centre of the transformation to the centre of the square.

Note 2 (for nerds): Matrix4 is in column-major order by default. In the way the code is written, we effectively write it in row-major format. Hence, all the row and column values written will be inverted along the diagonal.

Here’s how the screen looks right now:

Very interesting square we have there. Let’s see if we can do something with it.

#flutter

1597014000

## Google's Flutter 1.20 stable announced with new features - Navoki

Flutter Google cross-platform UI framework has released a new version 1.20 stable.

Flutter is Google’s UI framework to make apps for Android, iOS, Web, Windows, Mac, Linux, and Fuchsia OS. Since the last 2 years, the flutter Framework has already achieved popularity among mobile developers to develop Android and iOS apps. In the last few releases, Flutter also added the support of making web applications and desktop applications.

Last month they introduced the support of the Linux desktop app that can be distributed through Canonical Snap Store(Snapcraft), this enables the developers to publish there Linux desktop app for their users and publish on Snap Store.  If you want to learn how to Publish Flutter Desktop app in Snap Store that here is the tutorial.

Flutter 1.20 Framework is built on Google’s made Dart programming language that is a cross-platform language providing native performance, new UI widgets, and other more features for the developer usage.

Here are the few key points of this release:

#### Performance improvements for Flutter and Dart

In this release, they have got multiple performance improvements in the Dart language itself. A new improvement is to reduce the app size in the release versions of the app. Another performance improvement is to reduce junk in the display of app animation by using the warm-up phase.

If your app is junk information during the first run then the Skia Shading Language shader provides for pre-compilation as part of your app’s build. This can speed it up by more than 2x.

Added a better support of mouse cursors for web and desktop flutter app,. Now many widgets will show cursor on top of them or you can specify the type of supported cursor you want.

#### Autofill for mobile text fields

Autofill was already supported in native applications now its been added to the Flutter SDK. Now prefilled information stored by your OS can be used for autofill in the application. This feature will be available soon on the flutter web.

A new widget for interaction

`InteractiveViewer` is a new widget design for common interactions in your app like pan, zoom drag and drop for resizing the widget. Informations on this you can check more on this API documentation where you can try this widget on the DartPad. In this release, drag-drop has more features added like you can know precisely where the drop happened and get the position.

#### Updated Material Slider, RangeSlider, TimePicker, and DatePicker

In this new release, there are many pre-existing widgets that were updated to match the latest material guidelines, these updates include better interaction with `Slider` and `RangeSlider``DatePicker` with support for date range and time picker with the new style.

#### New `pubspec.yaml` format

Other than these widget updates there is some update within the project also like in `pubspec.yaml` file format. If you are a flutter plugin publisher then your old `pubspec.yaml`  is no longer supported to publish a plugin as the older format does not specify for which platform plugin you are making. All existing plugin will continue to work with flutter apps but you should make a plugin update as soon as possible.

#### Preview of embedded Dart DevTools in Visual Studio Code

Visual Studio code flutter extension got an update in this release. You get a preview of new features where you can analyze that Dev tools in your coding workspace. Enable this feature in your vs code by `_dart.previewEmbeddedDevTools_`setting. Dart DevTools menu you can choose your favorite page embed on your code workspace.

#### Network tracking

The updated the Dev tools comes with the network page that enables network profiling. You can track the timings and other information like status and content type of your** network calls** within your app. You can also monitor gRPC traffic.

#### Generate type-safe platform channels for platform interop

Pigeon is a command-line tool that will generate types of safe platform channels without adding additional dependencies. With this instead of manually matching method strings on platform channel and serializing arguments, you can invoke native class and pass nonprimitive data objects by directly calling the `Dart`method.

There is still a long list of updates in the new version of Flutter 1.2 that we cannot cover in this blog. You can get more details you can visit the official site to know more. Also, you can subscribe to the Navoki newsletter to get updates on these features and upcoming new updates and lessons. In upcoming new versions, we might see more new features and improvements.

You can get more free Flutter tutorials you can follow these courses:

#dart #developers #flutter #app developed #dart devtools in visual studio code #firebase local emulator suite in flutter #flutter autofill #flutter date picker #flutter desktop linux app build and publish on snapcraft store #flutter pigeon #flutter range slider #flutter slider #flutter time picker #flutter tutorial #flutter widget #google flutter #linux #navoki #pubspec format #setup flutter desktop on windows

1598396940

## What is Flutter and why you should learn it?

Flutter is an open-source UI toolkit for mobile developers, so they can use it to build native-looking** Android and iOS** applications from the same code base for both platforms. Flutter is also working to make Flutter apps for Web, PWA (progressive Web-App) and Desktop platform (Windows,macOS,Linux).

Flutter was officially released in December 2018. Since then, it has gone a much stronger flutter community.

There has been much increase in flutter developers, flutter packages, youtube tutorials, blogs, flutter examples apps, official and private events, and more. Flutter is now on top software repos based and trending on GitHub.

### Flutter meaning?

What is Flutter? this question comes to many new developer’s mind.

Flutter means flying wings quickly, and lightly but obviously, this doesn’t apply in our SDK.

So Flutter was one of the companies that were acquired by **Google **for around \$40 million. That company was based on providing gesture detection and recognition from a standard webcam. But later when the Flutter was going to release in alpha version for developer it’s name was Sky, but since Google already owned Flutter name, so they rename it to Flutter.

### Where Flutter is used?

Flutter is used in many startup companies nowadays, and even some MNCs are also adopting Flutter as a mobile development framework. Many top famous companies are using their apps in Flutter. Some of them here are

##### Abbey Road Studios

and many more other apps. Mobile development companies also adopted Flutter as a service for their clients. Even I was one of them who developed flutter apps as a freelancer and later as an IT company for mobile apps.

#dart #flutter #uncategorized #flutter framework #flutter jobs #flutter language #flutter meaning #flutter meaning in hindi #google flutter #how does flutter work #what is flutter

1644991598

## The Ultimate Guide To Tik Tok Clone App With Firebase - Ep 2

The Ultimate Guide To Tik Tok Clone App With Firebase - Ep 2
In this video, I'm going to show you how to make a Cool Tik Tok App a new Instagram using Flutter,firebase and visual studio code.

In this tutorial, you will learn how to Upload a Profile Pic to Firestore Data Storage.

🚀 Nice, clean and modern TikTok Clone #App #UI made in #Flutter⚠️

Starter Project : https://github.com/Punithraaj/Flutter_Tik_Tok_Clone_App/tree/Episode1

► Timestamps
0:00 Intro 0:20
16:35 Image Picker
20:06 Image Cropper
24:25 Firestore Data Storage Configuration.

⚠️ IMPORTANT: If you want to learn, I strongly advise you to watch the video at a slow speed and try to follow the code and understand what is done, without having to copy the code, and then download it from GitHub.

► Social Media
GitHub: https://github.com/Punithraaj/Flutter_Tik_Tok_Clone_App.git

► Previous Episode : https://youtu.be/QnL3fr-XpC4

I hope you liked it, and don't forget to like,comment, subscribe, share this video with your friends, and star the repository on GitHub!
⭐️ Thanks for watching the video and for more updates don't forget to click on the notification.
⭐️Please comment your suggestion for my improvement.
⭐️Remember to like, subscribe, share this video, and star the repo on Github :)

Hope you enjoyed this video!
If you loved it, you can Buy me a coffee : https://www.buymeacoffee.com/roaringraaj

LIKE & SHARE & ACTIVATE THE BELL Thanks For Watching :-)

https://youtu.be/F_GgZVD4sDk

#flutter tutorial - tiktok clone with firebase #flutter challenge @tiktokclone #fluttertutorial firebase #flutter firebase #flutter pageview #morioh #flutter

1640672627

## Flutter Hotel Booking UI - Book your Stay At A New Hotel With Flutter - Ep1

https://youtu.be/-tHUmjIkGJ4
Flutter Hotel Booking UI - Book your Stay At A New Hotel With Flutter - Ep1
#flutter #fluttertravelapp #hotelbookingui #flutter ui design

In this video, I'm going to show you how to make a Cool Hotel Booking App using Flutter and visual studio code.

In this tutorial, you will learn how to create a Splash Screen and Introduction Screen, how to implement a SmoothPageIndicator in Flutter.

🚀 Nice, clean and modern Hotel Booking #App #UI made in #Flutter

⚠️ IMPORTANT: If you want to learn, I strongly advise you to watch the video at a slow speed and try to follow the code and understand what is done, without having to copy the code, and then download it from GitHub.

► Social Media

I hope you liked it, and don't forget to like,comment, subscribe, share this video with your friends, and star the repository on GitHub!

⭐️ Thanks for watching the video and for more updates don't forget to click on the notification.⭐️Please comment your suggestion for my improvement. ⭐️Remember to like, subscribe, share this video, and star the repo on Github :)Hope you enjoyed this video! If you loved it, you can Buy me a coffee : https://www.buymeacoffee.com/roaringraaj

#flutter riverpod #flutter travel app #appointment app flutter #morioh

1591643580

## Adobe XD plugin for Flutter with CodePen Tutorial

Recently Adobe XD releases a new version of the plugin that you can use to export designs directly into flutter widgets or screens. Yes, you read it right, now you can make and export your favorite design in Adobe XD and export all the design in the widget form or as a full-screen design, this can save you a lot of time required in designing.

What we will do?
I will make a simple design of a dialogue box with a card design with text over it as shown below. After you complete this exercise you can experiment with the UI. You can make your own components or import UI kits available with the Adobe XD.

#developers #flutter #adobe xd design export to flutter #adobe xd flutter code #adobe xd flutter code generator - plugin #adobe xd flutter plugin #adobe xd flutter plugin tutorial #adobe xd plugins #adobe xd to flutter #adobe xd tutorial #codepen for flutter.