Working Out Point Location Relative To Other Point When Rotated - C# XNA

By running these specialized routines on the GPU, your software is only responsible for coordinating the efforts of the GPU and for shuffling required knowledge to and from graphic reminiscence. The XNA Framework features a set of managed libraries that gives access to those superior hardware options utilizing a expertise known as DirectX. DirectX is a set of drivers for these devices and a set of unmanaged APIs to entry them. Of course, DirectX supplies access to more than just the graphics hardware. Support for input devices and audio are supplied by the XNA Framework through managed wrappers to the XINPUT and XACT elements of DirectX. The .NET Framework is quick becoming the main platform for creating general-purpose Windows functions. The XNA Framework relies on .NET Framework elements like the Common Language Runtime and the core class libraries, however the XNA Framework has been specifically designed and optimized for developing games. As an added benefit, the XNA Framework APIs are highly portable between Windows and the Xbox 360 console so that games written for one platform could be recompiled to run on the other with little or no modification. But you proceed to need to supply a project for every platform, and any platform-specific code will must be conditionally compiled out (using #if XBOX360) for the other platform. Binaries that you generate for one platform will not run on the other---you should construct every project kind separately. Whenever the participant presses the A button on the controller , an image of a daisy will appear beneath the cursor. Using these flower stamps, the player can draw whatever he likes on the display. These buttons will permit the participant to save heaps of his paintings to a storage system, and retrieve it later. There's not likely an extreme amount of to say in regards to the drawing and player enter code. It's similar to the examples that we've already covered. There's a single texture for the game, and portions of that texture are drawn to the display to create the final image. There's a single list containing a set of Vector2 objects. Whenever the player presses the motion button, the present location of the cursor is added to the record. Every time the Draw technique of our recreation is recognized as, the code iterates via the record of areas, drawing a flower picture centered on each recorded location. Whenever the player presses the Save button, the present record of stamp areas is saved to the storage system.

Whenever the player presses the Load button, the present list of stamp areas is replaced with the information from our save recreation file. The code that really handles loading and saving our game information is contained inside the GameStorage class, exposed as static methods— Load and Save. Source Media The VirtualKeyboard class makes use of a single texture to generate the interface that you simply see on the display screen. The silhouette of the dialog is fashioned by one sprite, and the keys and text edit space are formed by a second sprite. The small button is used to focus on the character keys on the virtual keyboard. The source texture is loaded into memory by the primary game class every time its LoadGraphicsContent methodology is invoked by the XNA Framework. That technique assigns the texture to the Texture property of the VirtualKeyboard class. The boundaries of the sprite photographs are defined using a number of static readonly Rectangle member variables and every is hard-coded with its location and measurement data. Again, that is all pretty basic stuff, so I won't listing the complete source right here. You can find the complete source code for this chapter on the CD that accompanies this book. Wrapper Class It's a good idea to wrap the GamePad and GamePadState functionalities inside your individual custom helper class. That method, you might make global changes to how your sport processes input by changing one supply code file. Imagine that you've written a game that uses the controller. This game has several types of levels— every programmed as a separate C# class and every accessing the controller through the XNA Framework's GamePad class. After play testing, you resolve to supply an choice in order that the participant can reverse the controls for looking up and down (a common option in most first-person shooter games). Without the wrapper class, you'll need to edit and test every class that immediately accesses the controller APIs.

With the wrapper class, you edit one source code file, and the change is inherited by all your custom C# sport courses that use it. Of course, you'll also wish to provide a approach to quickly return to your default controller mappings for menus, however there's nice benefit in centralizing your controller logic. Imagine that you've written your sport solely for the Xbox 360 recreation console. When you're carried out writing it, you decide that you would also prefer to launch it as a Windows game. Not every Windows gamer could have an Xbox 360 Controller related to his PC, so that you determine to add keyboard help. Touching each sport screen that accepts controller input might be a pain. If you're using a wrapper class, you'll find a way to intercept keyboard input, map it to controller enter, and inject phantom button presses into the controller state that your sport makes use of. In truth, we will develop such a beast in a later chapter. Many instances, there will be relatively long spans the place the participant is urgent the same button or mixture of buttons. In a racing recreation, the player could also be on a straightaway, urgent the accelerator all the way in which in. In a first-person shooter, the participant could also be crouched in a corner, ready to snipe considered one of his buddies. On a pause screen, the participant has probably put the controller down and isn't urgent something. Implementation, and the image on the best was generated using our customized implementation. Notice the visual artifacts across the curved components of the sprite in the image on the right—near the edge of the face, the eyes, and the smile. Our pixel choice was primarily based on a simplified ''best guess.'' The XNA Framework's graphics APIs rely on hardware acceleration. We just grabbed the color that was stored within the closest source pixel. The point of this chapter wasn't to teach you tips on how to write a warp effect. It was to show you how one can create textures by populating pixel knowledge out of your code. It doesn't make much sense to base an entire sport off of software program rendering, however procedural textures are a strong software in your total design strategy. In addition to creating ''old skool'' demo results just like the warp effect seen right here, you'll have the ability to create sensible textures like wood, smoke, and fire in your 3D games.

And rendering your recreation screen to a texture lets you create interactive surroundings maps for objects like race cars and armor-clad heroes. Summary We've coated plenty of materials on this chapter. I want I may have gone into extra element in several areas, but complete books have been written on Direct3D, vertex and pixel shaders, texturing and lighting, and common 3D programming. You don't need to grasp all of the subjects that we've discussed on this chapter to begin out writing 3D video games in XNA. The XNA Framework does a great job of abstracting many of the implementation details away. On the other hand, I believe it's price your time to deepen your data in this space of recreation programming. Once you master the essential ideas discovered in this chapter, I extremely suggest that you just take the time to learn one of those dusty 3D books mendacity in your bookshelf or Google for some old 3D tutorials that don't use HLSL. In this chapter, we discovered the method to load a 3D model from the hard disk, move it round in our digital world, and apply shader effects to alter its appearance. We discovered how the GPU can be utilized to offload many rendering chores, liberating up the CPU to deal with other game-related duties. We realized that the XNA Framework supports 3D content material and shader scripts much like any other recreation useful resource, so far as the IDE and Content Pipeline are concerned, providing the identical, acquainted tools and interfaces for all.

Converting the Source Artwork The photographs in Nicu's collection are distributed as 64 separate files . There are 4 variations on his playing card theme, so the grand complete comes to 256 files. Those images are distributed in the SVG format (an xml-based vector format popular in many open-source and commercial graphics tools). Since XNA doesn't assist SVG, we'll must convert them to a format that XNA can use. Also, dealing with 256 separate textures in our code would be inefficient, and managing and sustaining these textures would be cumbersome. We'll need to create a single picture for every card set . While I might have carried out this work by hand using my picture enhancing software program, I determined to write down a customized Windows device to mechanically generate the composite image from all of the source photographs (see Figure 17.2). I won't go into detail on how the device was created, but the supply for the device is included along with the instance code for this chapter. To resize the source photographs and convert them to PNG files, I used the batch conversion tool that came with my graphics editor. I additionally created an image for the cursor that indicates which chute the player is currently manipulating. From that point, I used my customized device to create the master PNG picture from all those supply photographs. During the event of this chapter's instance code, I had to tweak the grasp image several occasions. Using the software saved me time through the design part, and provided constant results for every of the ensuing textures by eliminating my opportunities to introduce errors into the format. The present code and supply texture solely allow for a blue dialog. Use your favorite picture editor to convert the background picture to grayscale.

Then add a property to the VirtualKeyboard class known as DialogColor. Use this color because the tint everytime you draw the background sprite. Modify this code to add an ''uppercase'' character set for symbols. When the shift mode is about, swap in your new character set simply as you'd for the Accents set or the Alpha set. Since symbols don't have case, select some other characters. Whatever characters you resolve to make use of, ensure your game font includes the new characters. You might have to create a new bitmap font picture utilizing the utility that we developed in an earlier chapter. There's a nasty visual glitch in this management that basically should be fixed. Whenever the player enters textual content that extends beyond the width of the dialog, the drawn textual content ignores the boundaries and spills onto the sport surface, with new characters finally exiting the viewable display screen altogether. One easy fix could be to limit the size of edited textual content.

A more advanced solution may contain rendering only the substring of the edited textual content that may fit into the edit window. Using the Y button on his game pad, and he can press the left thumbstick to toggle between upper- and lowercase variations of the current character set. The participant will use the left thumbstick to pick characters, the A button to insert the currently chosen character, and the B button to delete the character that sits just to the left of the textual content cursor. Pressing the Start button will commit the changes to the sport, and pressing the Back button will cancel the adjustments. Every operate that is accessible by way of one of many mapped recreation pad buttons may even be available as an on-screen virtual keyboard button. A display shot of the instance ''game'' that we will develop on this chapter is proven in Figure 23.1. Since the VirtualKeyboard class is a reusable component, we can use it to immediate the player for so much of different inputs. The participant can use the identical virtual keyboard to call his in-game persona, enter a password, or name a save recreation data file. Increase the range of values for the X component of the m_spriteBall.Movement property by tweaking the fixed that is used to calculate the new horizontal speed of the ball in the CheckForBallPaddleCollision methodology. Increase the preliminary velocity of the ball as a perform of the extent number so that the level of difficulty increases every time the participant visits the same stage knowledge. There's a bug on this code where the ball can destroy a quantity of bricks when it passes a vertical arrangement of bricks, regardless of their hits-toclear setting. This happens when the ball's horizontal velocity is at or close to zero and the ball passes the column of bricks simply to the left or proper. In this case, the ball isn't deflected, and a number of hits are registered because the ball passes over the brick. Add code to the CheckForBallBrickCollision technique that detects and corrects this condition.

One resolution may contain reversing the ball's vertical movement vector. Another would possibly contain shifting the ball a couple of pixels to a minimal of one side in order that future collisions on the same path aren't registered. Yet one other may depend on the present logic, performing comparisons in opposition to completely different values (i.e., evaluating the closest side of the ball to the closest aspect of the brick, somewhat than using the center of the ball). Study the issue, devise a solution, and implement it. Modify this sport to permit levels to range the size of a brick. You can retain the current restriction that each one bricks inside a single level have the same dimension, however your new game ought to enable each degree to specify its personal brick dimensions. Remember to provide a sprite texture for every dimension, or create a generic brick that can be scaled to any dimension. Working with other builders and designers multiplies the creative process. Building on every other's concepts, you're often able to take your imaginative and prescient to a complete new level. It's like reaching a important mass on your design where new ideas explode. Without some primary organizational processes in place, your project is doomed to the hobbyist thought graveyard lengthy before the first line of code has ever been written. How will you divide the project into smaller, extra manageable pieces? There are a quantity of design document templates obtainable on the internet, however you'll be able to just as easily create your personal. The objective is to ensure that everyone on the staff understands the imaginative and prescient for the sport, and that they clearly perceive their role in the process and what's anticipated of them. Once you've documented the details and assigned tasks, you have to make sure that the team is definitely making forward progress in the path of your final goal of a finished sport. To assist you to keep organized, you ought to use one of many nice commercial or free project administration tools which may be out there, or simply track every little thing in a spreadsheet or a text file. Note I'm shortly becoming a fan of a project management and bug monitoring tool known as Gemini. It's a simple, web-based project management tool with a free licensing model for groups of 5 or fewer people. If you don't want to be that formal or you don't feel that your game project is complex enough to benefit the overhead, then don't use a project management tool.

It doesn't matter how you retain issues on observe, it simply matters that you simply do. Getting Started We need to create a texture (an picture file) primarily based on a Windows TrueType font. This image might need to help transparency so that textual content could be rendered over existing game objects. We will also need some approach to know where every character has been drawn on this texture. The interface for the consumer will be a console utility the place he can specify options at the command immediate. The bitmap font may have a fixed font measurement, decided by the person when he creates it. Open up Visual C# 2005 Express Edition and create a brand new Console Application project. Console functions differ from Windows purposes and recreation titles in that they're sometimes task-oriented. They take enter from the command line and course of it till completion. Once its task is complete, the console utility terminates. To hold issues easy, we'll break the code for our software into two fundamental parts—parse the user's input and generate the bitmap font. The person interface is contained in a single file (Program.cs), and the picture technology code is contained in another (FontMaker.cs). Content Pipeline Extensions By this time, you've used the Content Pipeline enough to know how helpful it's in providing a unified interface for importing media and other information into your game from content material creation tools.

The Content Pipeline makes it simpler for artists and designers to collaborate with programmers, each working in the surroundings with which he's most acquainted. Out of the box, the Content Pipeline provides importers for the most common 3D and 2D recreation content file sorts, in addition to an importer for audio. The pipeline additionally offers a quantity of commonplace processors for cleaning up that imported knowledge, in addition to lessons to learn and write that imported and processed data in a platform-agnostic format (.xbn files). In this chapter, we are going to create custom Content Pipeline elements to import the game fonts at compile-time, rather than loading and processing these source files inside our recreation logic (see Figure 26.1). Player Input The game helps each the keyboard and the game pad. If there are two human players, they will take activates the keyboard or on a single controller. If there is a controller lively on port two, then each player can use his personal controller. As talked about earlier, human enter is blocked while the AI is processing. This retains thread synchronization easy by stopping the creation of multiple, concurrent AI threads. The record of buttons and their features are shown in Table 18.1 There is a delay of 1 / 4 of a second between every button press. Rather than monitoring every button's pressed and launched state from body to border, the delay serves as a worldwide repeat fee. The biggest drawback to this methodology of processing participant enter is that it doesn't allow for button mixtures. Considering the kind of recreation that we're writing, that's not such a giant problem, although. And the savings in code complexity far outweigh any potential loss in participant enter design choices. Include the present files from the Windows project in the new Xbox 360 project. That means there's just one copy of the supply to manage, and modifications on one platform are reflected within the other the subsequent time I rebuild the executables for either platform. Solution and project files for each platforms have the identical name, with a ''Win'' suffix for Windows projects and a ''360'' suffix for Xbox 360 initiatives. This section assumes that you've a primary understanding of the Visual Studio IDE and how the XNA Framework helps graphics and participant enter. It also assumes that you perceive how to put in writing, build, and deploy easy applications. If you're not confident in these fundamental areas of recreation growth, please take time to review the introductory content discovered earlier on this book.

How Ot Make A Background Color Faor Evaluationbutton In Flutter

In this tutorial, we learned how to change background color of screen/scaffold in Flutter with practical examples. Basically, we can change the background color using the Scaffold and ThemeData widget and saw when to use which approach. As explained earlier, each button class includes a static method called styleFrom which constructs a ButtonStyle from a simple set of values, including the ColorScheme colors it depends on. In many common cases, using styleFrom to create a one-off ButtonStyle that overrides the defaults, is simplest. This is particularly true when the custom style's objective is to override one of the color scheme colors, like primary or onPrimary that the default style depends on.

For other cases you can create a ButtonStyle object directly. Doing so enables you to control the value of visual properties, like colors, for all of the button's possible states - like pressed, hovered, disabled, and focused. To change the background color of screen using the Scaffold widget, just add the backgroundColor property and assign the color you want. Widgets like the new button classes compute their default values based on the overall theme's colorScheme and textTheme as well as button's current state. In a few cases they also consider if the overall theme's color scheme is light or dark.

Each button has a protected method that computes its default style as needed. Although apps won't call this method directly, its API doc explains what all of the defaults are. When a button or button theme specifiesButtonStyle, only the button style's non-null properties override the computed defaults. The button's style parameter overrides non-null properties specified by the corresponding button theme.

For example ifforegroundColor property of a TextButton's style is non-null, it overrides the same property for the TextButonTheme's style. In this example, we are going to show you how to add semi-transparent background color on AppBar, Container, and to any other widget in the Flutter app. See the example, and learn different methods to add a background color with opacity. To change the background color of the screen using the ThemeData widget, just add the scaffoldBackgroundColor property and assign the color you want. The beauty of developing the app in Flutter is that you can customize your app the way you want.

For example, you may want to customize the app that speaks your brand language. And you may want to start with changing the background color of your screen. So in this tutorial, we'll learn the 2 easy ways to change background color of screen/scaffold in Flutter.

The Material Design spec defines buttons' foreground and overlay colors in terms of the color scheme's primary color. The primary color is rendered at different opacities, depending on the button's state. I'd like to add background color to both Raised Button in my code.

I also tried wrapping it with a Container and then applying container's background transparent, but it didn't work. To create a two-color gradient background, choose Gradient Fill, then use the color pickers or the color wheels to choose the two colors in the gradient colors. For example, choose purple to start the gradient, and blue to end the gradient. Use the other controls to change the angle and direction of the gradient. When you create a new app in Flutter, by default the background color is set to the Colors.grey which almost resembles the white color.

And this color is set for all the new screens that you create with the Scaffold widget. Except for simple use cases, the APIs of the new button classes are not compatible with the old classes. The visual attributes of the new buttons and themes are configured with a single ButtonStyle object, similar to how a TextField or a Text widget can be configured with aTextStyle object. Most of the ButtonStyle properties are defined withMaterialStateProperty, so that a single property can represent different values depending on the button's pressed/focused/hovered/etc state. A new set of basic material button widgets and themes have been added to Flutter.

The original classes have been deprecated and will eventually be removed. The overall goal is to make buttons more flexible, and easier to configure via constructor parameters or themes. Is like a box that allows you to add a background color, rounded corners, or set some size constraints to a child widget. To add more than two colors to a gradient fill, choose Advanced Gradient Fill. Use the slider to add color stops to add more colors to the gradient.

Click a color stop to change the color of that stop. Drag the color stops and use the other controls to change the blend, angle, and direction of the gradient. To create a two-color gradient background, tap Gradient, then use the color pickers to choose swatches. Tap Flip Color to change the direction of the gradient. You can use Colors.colorName.withOpacity method to set the transparent background color. Here, 0.5 is an opacity value, which ranges from 0-1.

Use this approach when you want to change the background color only on a specific screen. There are main two ways you can change background color of screen/scaffold in Flutter. To quickly add a background, click the color well next to Background, then choose a preset color, gradient, or image. You can change the background color or image of each slide in a presentation. To quickly add a background, click the box next to Background, then choose a preset color, gradient, or image. You can change the background color or image of individual slides in a presentation.

You can use Color.fromARGB method to set the transparent background color. You can use Color.fromRGBO method to set the transparent background color. Using the colors.transparent or setting opacity property to 0 may not work if you used a gradient as the background. For this reason, the most logical choice for RaisedButton is to set its elevation property to 0. Here is my code,I'd like to set a background color, transparent to my button. The idea is to hide border by Container with the same background color.

For active state you just need to add an icon inside the second Container. To quickly choose a preset background, tap the color well next to Background, then choose a preset color, gradient, or image. You can add a color, a color gradient, or an image as the background for your document, spreadsheet, or presentation. In this article, I'm going to present the main classes and some examples of the InAppWebView widget that people were asking about on the official flutter_inappwebview repository and on StackOverflow.

In many cases it's possible to just switch from the old button class to the new one. That's assuming that the small changes in size/shape and the likely bigger change in colors, aren't a concern. The new themes follow the "normalized" pattern that Flutter adopted for new Material widgets about a year ago. Theme properties and widget constructor parameters are null by default.

Non-null theme properties and widget parameters specify an override of the component's default value. Implementing and documenting default values is the sole responsibility of the button component widgets. The defaults themselves are based primarily on the overall Theme's colorScheme and textTheme. To set the background color of CupertinoButton in Flutter, set the color property with the required Color value.

When Screen View is turned on for Pages on iPhone, some types of backgrounds behave differently in documents with multiple sections. If each section of your document has a different image or gradient background, the document's contents move when you scroll, but the background itself doesn't change or move. When you scroll from one section to another, the background switches at the section break. In this article, I made a little introduction to the flutter_inappwebview plugin, focusing on the InAppWebView widget. This plugin is in continuous development (at the time of writing this, the latest release is 4.0.0) and I recommend you check out the API Reference to find out all the features. For any new feature request/bug fix, you can use the issue section of the repository.

You can customize WebView's context menu by adding custom menu items and/or hiding the default system menu items. For each custom menu item, you can declare a callback action to be invoked when the user clicks on it. As an example, I will add a custom menu item named Special and I will define a callback action that shows a JavaScript window.alert to the user.

Through it, you can control your WebView or access its properties, such as the current URL . The full list of all methods you can use is quite long and available here. Use this approach when you want to change the background on all screens of your app. The original FlatButton, RaisedButton, and OutlineButton classes all provide a shape parameter which defines both the button's shape and the appearance of its outline. The corresponding new classes and their themes support specifying the button's shape and its border separately, with OutlinedBorder shape and BorderSide side parameters.

The new version is more flexible although less compact. In the original version, the the precedence of the different states is implicit and fixed, in the new version, it's explicit. This kind of override is common; however, in many cases what's also needed are overrides for the overlay colors that the text button uses to indicate its hovered/focus/pressed state. This can be done by adding the overlayColor property to the ButtonStyle.

Many applications will be able to just substitute the new class names for the old ones. Visually, the new buttons look a little different, because they match the current Material Design spec and because their colors are configured in terms of the overall Theme's ColorScheme. There are other small differences in padding, rounded corner radii, and the hover/focus/pressed feedback. Rather than try and evolve the existing button classes and their theme in-place, we have introduced new replacement button widgets and themes. The thing is, I thought that Xcode will generate required png file from this svg based on device's pixel density.

So in this case, say, on newer devices that use @3x images, at compile time, cause my button is defined as 32x32 points, a 96px X 96px image will be created and used as @3x image. Now I would like to add condition if button checked unblock, if not checked block. Some widgets will take up the entire space in Container instead of their set size. This can happen with a Container in Container and with an IconButton in Container. If you encounter this issue, set the child's alignment to zero.

Transition point to adjust the distribution of each color in the linear gradient. The Transition point can only accept a value between 0.0 to 1.0. If you add 3 colors, you can set the Transition Point as 0.0,0.5 and 1.0 for each color respectively. To add a color overlay to an image, choose Advanced Image Fill, then click the color picker or the color wheel and make your adjustments. In a word-processing document, changing a page background also changes the background for all of the pages in the same section. To change just one page, make that page its own section and then change its background.

In a page layout document, you can change the background of any single page. You can change the background of your documents in Pages, Numbers, and Keynote on iPhone, iPad, and iPod touch. How to set Gradient Background on ElevetedButton in Flutter In this example, we are going to show you how to set gradient background on ElevatedButton in Flutter. We will use DecoratedBox() widget to set gradient background.

It's a Flutter plugin that allows you to incorporate WebView widgets into your Flutter app, to use headless WebViews or to use in-app browsers. The new button classes do not support a separate highlight color because it's no longer part of the Material Design. Using the styleFrom() method is the preferred way to create aButtonStyle if you're trying to create a Material Design variation.

The most flexible approach is defining a ButtonStyledirectly, with MaterialStateProperty values for the states whose appearance you want to override. The theme determines the background color of the page. In the example below the background color is blue but it can technically be any color.

When you open this vector file in image editor, you see that it has 192x192 dimensions. Which I guess its not relevant at all when it comes to vectors files, but... I'm struggling with UIButton on Xcode13 which have UIButton.ConfigurationI want to make a Custom UIButton with default style UIButton. So I was try to change UIButton style plain to default from init but I couldn't find where I could change it. The problem is that when i am trying to access the text in a given button, I can only access the last one to be added.

In all other cases, the background color should be "White". It is also possible to have additional colors and finer control over where on the screen the color transition should take effect. The key to this is the addition of a decoration and BoxDecoration to the Container widget. This allows you to define a LinearGradient which can be given colors, as well as a begin and end Alignment. Using flutter create will produce a demo application that will display the number of times a button is clicked.

Background color of CupertinoButton widget is set with Color.blue using color property. To add an image as the background, choose Image Fill, click Choose, then navigate to the image you want. How to Change AppBar Background Color in Flutter In this example, we are going to show you how to set AppBar color in Flutter. You will learn different ways to set AppBar color such as by changing the default color of the App, directly changing the AppBar color. Opacity is an important factor in app designing and building. Also, CreateWindowRequest contains the url of the request (on Android, if the popup is opened using JavaScript with window.open, it will be null).

InAppWebView can recognize downloadable files in both Android and iOS platforms. To be able to recognize downloadable files, you need to set the useOnDownloadStart option to true and then you can listen to the onDownloadStart event. I recommend checking the API Reference to get more details. As for the WebView options and methods, the full list of all WebView events is quite long and available here. And I wanted to ask you how I can adjust its dimensions Below is the code that I have shortened for ease of reading. // Trying to put this into a class for later and trying to call on the methods but I keep getting instances of it without being able to see the output when I have them in a class I try to create.

// I want to be able to call on and reuse the classes across the application is what I'm going for... // Need this in a class and how to call on methods for use in other classes. This creates a linear gradient that starts at the left of the screen with cyan and gradually transitions to indigo at the right of the screen. This creates a linear gradient that starts at the top of the screen with blue and gradually transitions to red at the bottom of the screen. Enter the value to see the drop shadow effect below the Container.