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  • Structuring game world entities and their rendering objects

    - by keithjgrant
    I'm putting together a simple 2d tile-based game. I'm finding myself spinning circles on some design decisions, and I think I'm in danger of over-engineering. After all, the game is simple enough that I had a working prototype inside of four hours with fewer than ten classes, it just wasn't scalable or flexible enough for a polished game. My question is about how to structure flow of control between game entity objects and their rendering objects. Should each renderer have a reference to their entity or vice-versa? Or both? Should the entity be in control of calling the render() method, or be completely oblivious? I know there are several valid approaches here, but I'm kind of feeling decision paralysis. What are the pros and cons of each approach?

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  • How to hide download file from bots? [closed]

    - by CJ7
    Possible Duplicate: How to restrict the download of all files in a folder? I want to make a private file available for download but not use username/password protection. I want to put the file into a directory called something like download. How can I ensure: the file does not become part of search engine results, and the file cannot be accessed by bots that might guess the directory name?

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  • Breakout ball collision detection, bouncing against the walls [solved]

    - by Sri Harsha Chilakapati
    I'm currently trying to program a breakout game to distribute it as an example game for my own game engine. http://game-engine-for-java.googlecode.com/ But the problem here is that I can't get the bouncing condition working properly. Here's what I'm using. public void collision(GObject other){ if (other instanceof Bat || other instanceof Block){ bounce(); } else if (other instanceof Stone){ other.destroy(); bounce(); } //Breakout.HIT.play(); } And here's by bounce() method public void bounce(){ boolean left = false; boolean right = false; boolean up = false; boolean down = false; if (dx < 0) { left = true; } else if (dx > 0) { right = true; } if (dy < 0) { up = true; } else if (dy > 0) { down = true; } if (left && up) { dx = -dx; } if (left && down) { dy = -dy; } if (right && up) { dx = -dx; } if (right && down) { dy = -dy; } } The ball bounces the bat and blocks but when the block is on top of the ball, it won't bounce and moves upwards out of the game. What I'm missing? Is there anything to implement? Please help me.. Thanks EDIT: Have changed the bounce method. public void bounce(GObject other){ //System.out.println("y : " + getY() + " other.y + other.height - 2 : " + (other.getY() + other.getHeight() - 2)); if (getX()+getWidth()>other.getX()+2){ setHorizontalDirection(Direction.DIRECTION_RIGHT); } else if (getX()<(other.getX()+other.getWidth()-2)){ setHorizontalDirection(Direction.DIRECTION_LEFT); } if (getY()+getHeight()>other.getY()+2){ setVerticalDirection(Direction.DIRECTION_UP); } else if (getY()<(other.getY()+other.getHeight()-2)){ setVerticalDirection(Direction.DIRECTION_DOWN); } } EDIT: Solved now. See the changed method in my answer.

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  • No windows whatsoever after compiz reset

    - by Shashank Singh
    Currently using 12.04. This time I was trying to use the application switcher, and it asked me to resolve a few conflicts most of which were not easy to comprehend. So after some yes and no dialogue boxes leading me nowhere, I thought a reset should set things fine. However, after preferences-reset to default, I can't see any window!! NONE whatsoever except the log out one when I press ctrl+alt+del All I can see is the wallpaper and the mouse pointer. I cant even see the terminal or anything when I press alt+f2. I am posting this when I switch to ubuntu 2d (I cant make out the difference between the two, but this just works for now almost the same way)

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  • Make Money Online - Use SEO

    Do you want a method to improve your e-marketing results? Then you have to try to take advantage of search engine optimization (SEO) and social media optimization. In this article we are going to give you six helpful tips on doing just that.

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  • Wise Selection of SEO Services Company

    As a site owner, you have to be wise enough in the selection of the SEO services company that will help your site rank high in the search engine. Be aware to some companies who are just interested with your money that will give you a poor outcome.

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  • Local SEO, SMB and Google Places - Tips You Won't Find Elsewhere

    The internet is moving fast and if you are a small business SMB needing to be found online through local search engine optimization SEO, then you better mover faster. The changes just in Google Maps Local Business Center include a name change to Google Places and much, much more. There is much already reported about how to take advantage. Here are three tips you will not likely find any where else.

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  • CW/CCW Rotation of a Vector

    - by user23132
    Considering that I have a vector A, and after an arbitrary rotation I get vector B. I want to use this rotation operation in others vectors as well, but I'm having problems in doing that. My idea do that is to calculate the perpendicular vector C of the plane AB (by calculating AxB). This vector C is the axis that I'll need to rotate. To discover the angle I used the dot product between A and B, the acos of the dot product will return the lowest angle between A and B, the angle ang. The rotation I need to do is then: -rotate *ang*º around the C axis. The problem is that I dont know if this rotation is a CW or CCW rotation, since the cos of the dot product does not give me information of the sign of the angle. There's a tip discover that in 2D ( A.x * B.y - A.y * B.x) that you can use to discover if the vector A is at left/right of vector B. But I dont know how to do this in 3D space. Can anyone help me?

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  • Getting isometric grid coordinates from standard X,Y coordinates

    - by RoryHarvey
    I'm currently trying to add sprites to an isometric Tiled TMX map using Objects in cocos2d. The problem is the X and Y metadata from TMX object are in standard 2d format (pixels x, pixels y), instead of isometric grid X and Y format. Usually you would just divide them by the tile size, but isometric needs some sort of transform. For example on a 64x32 isometric tilemap of size 40 tiles by 40 tiles an object at (20,21)'s coordinates come out as (640,584) So the question really is what formula gets (20,21) from (640,584)?

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  • 3 Easy Rules For Keyword Optimization

    Keyword optimization is one of the most basic tactics you have to attract free search engine traffic. Even if you are not too familiar with keyword SEO it is way too easy to learn and way too valuable to your business to overlook. It all starts with developing a keyword list and then properly using them in a way that will help increase your website traffic.

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  • New AutoVue for Agile Data Sheet & Solution Brief

    - by Pam Petropoulos
    AutoVue for Agile visualization solutions deliver best-in-class document and CAD (MCAD and ECAD) visualization and collaboration capabilities directly within Oracle Agile PLM. With AutoVue for Agile solutions, companies can enable visual decision-making across the product lifecycle and simplify end-to-end design to manufacturing. They can also optimize new product development and introduction, as well as change management processes, and enable more efficient collaboration with global supply chain partners without jeopardizing critical intellectual property. Check out the latest AutoVue for Agile materials which outline the capabilities of the AutoVue 2D Professional for Agile and AutoVue Electro-Mechanical Professional for Agile solutions and their corresponding benefits. Click here for the data sheet. Click here for the solution brief.

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  • SEO is Internet Marketing's Gold Rush

    Search Engine Optimization is a lot like the Gold Rush of 1848. Those willing to take on the risk and expense early on found enough gold to finance larger mining operations and were the big winners, while latecomers oftentimes were left behind.

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  • Why does 12.04 freeze when using multiple desktops?

    - by Dustin
    I am using 12.04 32-bit, upgraded from 11.10. Within the last week and a half Unity has hung on me with no option but a hard reboot, which I hate. It usually happens when I am using multiple desktops and applications and switching desktops. The screen just hangs, sometimes broken between desktops and applications, I can move my mouse but cannot click on anything. alt+f2 , HUD , super+w/s/d and alt+tab/~ does nothing, they do not activate. I let it rest for 15-20 minutes in hopes it will sort itself out but nothing. I'd hate to move to Unity 2D, but I can't risk having to do hard reboots/shutdowns, or moving to a different DE. Other information: the only PPA's I have added recently would be the word lens. 2.8GB RAM processor : 0 vendor_id : AuthenticAMD cpu family : 15 model : 127 model name : AMD Sempron(tm) Processor LE-1250 stepping : 2 microcode : 0x83 cpu MHz : 1000.000

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  • Ultimate Web Traffic - Avoid These SEO Blunders to Experience That!

    It is the ultimate goal of every website to receive huge numbers of visitors because without that everything else is pointless. To achieve this, websites use the most powerful marketing tools and techniques. It is a known fact that Search Engine Optimization is the best and most widely used method to draw crowds to your website.

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  • How to modify VBO data

    - by Romeo
    I am learning LWJGL so i can start working on my game. In order to learn LWJGL I got the idea to implement the map builder so I can get comfortable with graphics programming. Now, for the map creation tool I need to draw new elements or draw the old one's with different coordinates. Let me explain this: My game will be a 2D scroller. The map will be consisting of multiple rectangles ( 2 strip triangles). When I click my left-mouse button i want to start the rectangle and when I release it I want to stop the rectangle bottom-right at that position. As I want to use VBOs I want to know how to modify data inside the VBO based on user input. Should i have a copy of a vertex array and then add the whole array to the VBO at each user input? How is usually implemented the VBO update?

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  • New Whitepaper from SQLBI: Vertipaq vs ColumnStore

    - by AlbertoFerrari
    At the end of June 2012, I was in Amsterdam to present some sessions at Teched Europe 2012 and, while preparing the material for the demos (yes, the best demos are the ones I prepare at the last minute), I decided to make a comparison between the two implementations of xVelocity of SQL 2012, one is the VertiPaq engine in SSAS Tabular and the other one is the ColumnStore index in SQL Server. After some trials, I decided that ColumnStore was a clear loser, because I was not able to see a real improvement...(read more)

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  • How should I sort images in an isometric game so that they appear in the correct order?

    - by Andrew
    Hi! This seems like a rather simple problem but I am having a lot of difficulty with it. What should I do to properly sort images in an isometric game? In a normal 2d top-down game one could use the screen y axis to sort the images. In this example the trees are properly sorted but the isometric walls are not. Example image: sorted by screen y Wall2 is one pixel below wall1 therefore it is drawn after wall1. If I sort by the isometric y axis the walls appear in the correct order but the trees do not. Example image: sorted by isometric y

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  • TriptychBlog

    - by csharp-source.net
    TriptychBlog is an Open Source Blogging Engine powered by the Microsoft ASP.net 2.0 framework. It has many great features. TriptychBlog is entirely open source and will run on any computer using Windows 2000 or higher.

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  • Keeping it Legal - Privacy Policy & PCI Compliance

    One of the most overlooked aspects of a website are the legal disclaimers such as the Privacy Policy and Terms of Use. This article is designed to help you put together these important web documents to keep you in compliance with federal law as well as Google (and other Search Engine's) best practices. Privacy Policy The Privacy Policy is extremely important.

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