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  • Are there any formal approaches for familiarising oneself with a new or legacy codebase? [closed]

    - by codecowboy
    Possible Duplicate: How do you dive into large code bases? As a contractor, I often encounter legacy codebases which might have little or no supporting documentation. Are there any techniques or best practices? I work with PHP and web applications, though also face situations in which I have to edit code in an unfamiliar language. How can I leave a codebase in better shape, learn something along the way and impress the team I'm working with?

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  • Google I/O 2012 - Making Good Apps Great: More Advanced Topics for Expert Android Developers

    Google I/O 2012 - Making Good Apps Great: More Advanced Topics for Expert Android Developers Reto Meier In a follow-up to last year's session, I'll demonstrate how to use advanced Android techniques to take a good app and transform it into a polished product, without being a resource hog. Features advanced coding tips and tricks, bandwidth-saving techniques, implementation patterns, exposure to some of the lesser-known API features, and insight into how to minimize battery drain by ensuring your app is a good citizen on the carrier network. For all I/O 2012 sessions, go to developers.google.com From: GoogleDevelopers Views: 2193 69 ratings Time: 58:35 More in Science & Technology

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  • Collision Detection for 2D

    - by Bhaskar
    I am working on a simple game, where I need to do a collision detection of two Texture2D. The code I have written is: bool perPixelCollission = false; Texture2D texture1 = sprite1.Texture; Texture2D texture2 = sprite1.Texture; Vector2 position1 = new Vector2(sprite1.CurrentScope.X, sprite1.CurrentScope.Y); Vector2 position2 = new Vector2(sprite2.CurrentScope.X, sprite2.CurrentScope.Y); uint[] bitsA = new uint[texture1.Width * texture1.Height]; uint[] bitsB = new uint[texture2.Width * texture2.Height]; Rectangle texture1Rectangle = new Rectangle(Convert.ToInt32(position1.X), Convert.ToInt32(position1.Y), texture1.Width, texture1.Height); Rectangle texture2Rectangle = new Rectangle(Convert.ToInt32(position2.X), Convert.ToInt32(position2.Y), texture2.Width, texture2.Height); texture1.GetData<uint>(bitsA); texture2.GetData<uint>(bitsB); int x1 = Math.Max(texture1Rectangle.X, texture2Rectangle.X); int x2 = Math.Min(texture1Rectangle.X + texture1Rectangle.Width, texture2Rectangle.X + texture2Rectangle.Width); int y1 = Math.Max(texture1Rectangle.Y, texture2Rectangle.Y); int y2 = Math.Min(texture1Rectangle.Y + texture1Rectangle.Height, texture2Rectangle.Y + texture2Rectangle.Height); for (int y = y1; y < y2; ++y) { for (int x = x1; x < x2; ++x) { if (((bitsA[(x - texture1Rectangle.X) + (y - texture1Rectangle.Y) * texture1Rectangle.Width] & 0xFF000000) >> 24) > 20 && ((bitsB[(x - texture2Rectangle.X) + (y - texture2Rectangle.Y) * texture2Rectangle.Width] & 0xFF000000) >> 24) > 20) { perPixelCollission = true; break; } } // Reduce amount of looping by breaking out of this. if (perPixelCollission) { break; } } return perPixelCollission; But this code is really making the game slow. Where can I get some very good collision detection tutorial and code? What is wrong in this code?

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  • On Android Compatibility

    [This post is by Dan Morrill, Open Source & Compatibility Program Manager. — Tim Bray] At Google I/O 2010, we announced that there are over 60 Android models...

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  • More Than a Map - Ubilabs

    More Than a Map - Ubilabs In Hamburg, Germany we met with certified Google Maps API development partner Ubilabs. Ubilabs founders Michael Pletziger and Martin Kleppe showed us some of the Google Maps API driven projects they have built for Germany's largest brands such as Deutsche Telekom, Blitzer.de, and BMW. Read more on morethanamap.com #morethanamap From: GoogleDevelopers Views: 6 0 ratings Time: 01:48 More in Science & Technology

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  • RadioButtons and Lambda Expressions

    - by MightyZot
    Radio buttons operate in groups. They are used to present mutually exclusive lists of options. Since I started programming in Windows 20 years ago, I have always been frustrated about how they are implemented. To make them operate as a group, you put your radio buttons in a group box. Conversely, to group radio buttons in HTML, you simply give them all the same name. Radio buttons with the same name or ID in HTML operate as one mutually exclusive group of options. In C#, all your radio buttons must have unique names and you use group boxes to group them. I’m in the process of converting some old code to C# and I’m tasked with creating a user control with groups of radio buttons on it. I started out writing the traditional switch…case statements to check the appropriate radio button based upon value, loops to uncheck them all, etc. Then it occurred to me that I could stick the radio buttons in a Dictionary or List and use Lambda expressions to make my code a lot more maintainable. So, here is what I ended up with: Here is a dictionary that contains my list of radio buttons and their values. I used their values as the keys, so that I can select them by value. Now, instead of using loops and switch…case statements to control the radio buttons, I use the lambda syntax and extension methods. Selecting a Radio Button by Value This code is inside of a property accessor, so “value” represents the value passed into the property accessor. The “First” extension method uses the delegate represented by the lambda expression to select the radio button (actually KeyValuePair) that represents the passed in value. Finally, the resulting checkbox is checked. Since the radio buttons are in the same group, they function as a group, the appropriate radio button is selected while the others are unselected. Reading the Value This is the get accessor for the property that returns the value of the checked radio button. Now, if you’re using binding, this code is likely not necessary; however, I didn’t want to use binding in this case, so I think this is a good alternative to the traditional loops and switch…case statements.

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  • Animations not accepted in animator

    - by Lautaro
    In the official Unity Animator State Machine tutorial video animation clips are dragged out from the assets folder into the animator and dropped. I have a 3D model that i bought online to experiment with that comes with animations. I added a custom made animation as well. These all work well in my demo project. But when i add a animator to the assets and try to drag and drop animations onto it it doesnt work. I get a forbidden-sign as a mouse pointer. I try to add animations through the inspector but that does not work either. The tutorials makes it seem so easy and does not talk anything about what animations can be used. What am i doing wrong?

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  • How do you make a bullet ricochet off a vertical wall?

    - by Bagofsheep
    First things first. I am using C# with XNA. My game is top-down and the player can shoot bullets. I've managed to get the bullets to ricochet correctly off horizontal walls. Yet, despite using similar methods (e.g. http://stackoverflow.com/questions/3203952/mirroring-an-angle) and reading other answered questions about this subject I have not been able to get the bullets to ricochet off a vertical wall correctly. Any method I've tried has failed and sometimes made ricocheting off a horizontal wall buggy. Here is the collision code that calls the ricochet method: //Loop through returned tile rectangles from quad tree to test for wall collision. If a collision occurs perform collision logic. for (int r = 0; r < returnObjects.Count; r++) if (Bullets[i].BoundingRectangle.Intersects(returnObjects[r])) Bullets[i].doCollision(returnObjects[r]); Now here is the code for the doCollision method. public void doCollision(Rectangle surface) { if (Ricochet) doRicochet(surface); else Trash = true; } Finally, here is the code for the doRicochet method. public void doRicochet(Rectangle surface) { if (Position.X > surface.Left && Position.X < surface.Right) { //Mirror the bullet's angle. Rotation = -1 * Rotation; //Moves the bullet in the direction of its rotation by given amount. moveFaceDirection(Sprite.Width * BulletScale.X); } else if (Position.Y > surface.Top && Position.Y < surface.Bottom) { } } Since I am only dealing with vertical and horizontal walls at the moment, the if statements simply determine if the object is colliding from the right or left, or from the top or bottom. If the object's X position is within the boundaries of the tile's X boundaries (left and right sides), it must be colliding from the top, and vice verse. As you can see, the else if statement is empty and is where the correct code needs to go.

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  • Hangouts API v1.1 Walkthrough

    Hangouts API v1.1 Walkthrough Introduction to 3 new features in v1.1 of the Hangouts API. This release introduces the ability for your app to respond to face movements in real time. It also provides a new overlay positioned relative to the video feed, new low-latency messages, Hangouts on Air support, the ability to enter any OAuth scope, and a few other miscellaneous features. From: GoogleDevelopers Views: 4425 0 ratings Time: 01:14 More in Science & Technology

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  • HP Probook touchpad

    - by ScienceSE
    I wrote about this problem some weeks ago, but now the question is: "Why is touchpad works not so good as in windows". I tried some "experiments": When I use windows and if I accidentally touched touchpad - cursor isn't moving, also no clicks occurring. So in windows working with touchpad is quite normal, but in Ubuntu ?f I accidentally touch the touchpad even with my wrist - cursor is moving etc. In Windows, the cursor moves only when I touch it with finger. And... If, for example, I hold one finger on touchpad and simultaneously move the second finger on the touchpad - the cursor doesn't move, however in ubuntu he does. He's "super sensetive" in ubuntu or what? Also I tried to apply the option in "Mouse and touchpad", which called "Disable touchpad when typing", but nevertheless he isn't disabling when i'm typing... Note: this option is circled in red frame, i dont know is it a good "sign" ) What can I do to fix the problem?

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  • More Than a Map - Computerlogy

    More Than a Map - Computerlogy In Bangkok, Thailand we met with the co-founder of Computerlogy, Vachara Aemavat. Computerlogy is a Google Maps API development shop. Among their many great projects, they have built a great store locator for Siam Commercial Bank and a viral maps app that helps people find high ground during the Thai flood seasons. Read more on morethanamap.com #morethanamap From: GoogleDevelopers Views: 60 4 ratings Time: 02:04 More in Science & Technology

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  • Umit Project 2010

    Umit Project is an international open source organization focused on network monitoring, with the goal of making life easier for network administrators and others who need to be...

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  • Announcing the Drive Installation Scope

    Announcing the Drive Installation Scope On September 12, Google Drive released a new feature of great interest to many Drive web app developers: the installation scope. In this session we'll discuss the benefits of the installation scope, walk through the related documentation, and do a brief demo of how it works. From: GoogleDevelopers Views: 0 0 ratings Time: 00:00 More in Science & Technology

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