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  • Problem creating levels using inherited classes/polymorphism

    - by Adam
    I'm trying to write my level classes by having a base class that each level class inherits from...The base class uses pure virtual functions. My base class is only going to be used as a vector that'll have the inherited level classes pushed onto it...This is what my code looks like at the moment, I've tried various things and get the same result (segmentation fault). //level.h class Level { protected: Mix_Music *music; SDL_Surface *background; SDL_Surface *background2; vector<Enemy> enemy; bool loaded; int time; public: Level(); virtual ~Level(); int bgX, bgY; int bg2X, bg2Y; int width, height; virtual void load(); virtual void unload(); virtual void update(); virtual void draw(); }; //level.cpp Level::Level() { bgX = 0; bgY = 0; bg2X = 0; bg2Y = 0; width = 2048; height = 480; loaded = false; time = 0; } Level::~Level() { } //virtual functions are empty... I'm not sure exactly what I'm supposed to include in the inherited class structure, but this is what I have at the moment... //level1.h class Level1: public Level { public: Level1(); ~Level1(); void load(); void unload(); void update(); void draw(); }; //level1.cpp Level1::Level1() { } Level1::~Level1() { enemy.clear(); Mix_FreeMusic(music); SDL_FreeSurface(background); SDL_FreeSurface(background2); music = NULL; background = NULL; background2 = NULL; Mix_CloseAudio(); } void Level1::load() { music = Mix_LoadMUS("music/song1.xm"); background = loadImage("image/background.png"); background2 = loadImage("image/background2.png"); Mix_OpenAudio(48000, MIX_DEFAULT_FORMAT, 2, 4096); Mix_PlayMusic(music, -1); } void Level1::unload() { } //functions have level-specific code in them... Right now for testing purposes, I just have the main loop call Level1 level1; and use the functions, but when I run the game I get a segmentation fault. This is the first time I've tried writing inherited classes, so I know I'm doing something wrong, but I can't seem to figure out what exactly.

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  • Simpler reachability ApI?

    - by Moshe
    I've downloaded the Reachability API and I'd like to know if there is a simpler version anywhere, or if someone can point out the bare-bones essential part of it, so that I don't need to add tons of files to my project. I don't need the whole API, I just need to check for any sort of connectivity, a particular host will be assumed available after that.

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  • Content controls have to be top-level controls

    - by horatio
    I have a website that can be accessed from www.blahblah.com and special.blahblah.com. The www site always works but occasionly I get a 'Content controls have to be top-level controls in a content page or a nested master page that references a master page' error on the special site. It's exactly the same code running in both situations and the offending page doesn't even have a master page. Why would it work all the time on one and fail sometimes on the other?

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  • Le W3C publie un premier brouillon de l'API Push, qui permettra d'intégrer des notifications Push au sein des applications Web

    Le W3C publie un premier brouillon de l'API Push qui permettra d'intégrer des notifications Push au sein des applications Web Le groupe de travail Web Applications du W3C (World Wide Web Consortium) vient de publier un brouillon pour l'API Push. La spécification Push API décrit la façon dont un serveur d'applications peut envoyer des données cryptées (messages Push) à des applications Web côté client, telles qu'elles sont effectuées par des « services Push ». L'API pourra être utilisée par les développeurs pour mettre en oeuvre des systèmes de notifications Push au sein de leurs Webapps. Selon la description du W3C, le message Push pourra être envoyé même si l'applic...

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  • Twitter API with urllib2 in python

    - by Dirk Nachbar
    I want to use the Twitter API in Python to lookup user ids from name using the lookup method. I have done similar requests simply using response = urllib2.urlopen('http://search.twitter.com...') but for this one I need authentication. I don't think I can do it through the Google python twitter API because it doesn't have the lookup method. Any ideas how can I can auth with urllib2??

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  • Ruby 1.9 and Rackspace's email api (SOAP)

    - by kjs3
    Is anyone out there working with SOAP on Ruby 1.9? Rackspace has email addresses for $2/month and an api to programmatically create/destroy accounts which looks like the best I've found. Fusemail has $2 addresses too but you need a minimum of 80 to get access to the api. So, I either need to find a solution to working with Rackspace or a different email host.

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  • how to set user level

    - by fetty
    Hi, I am doing a system that require a login page. The problem is I dont know how to set the user level. For an example : if admin, can access all the page and if user can access only certain page. How to do that?

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  • Twitter API question

    - by Morano88
    I have a question regarding Twitter API. I came across something called "Parameters and Values" in the API console here : http://dev.twitter.com/console. What can I put here ? I want to filter the response of public statuses to only those have the Hashtag #Give .. Can I do that from here ? What language should I use here ?

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  • Trouble with apache starting on boot with ssl api key

    - by molleman
    Im Running on Centos, the trouble is when i restart my server i need to start my apache and varnish service I use this to start both of them service httpd restart && service varnish restart But i would likw both of them to start when i reboot the server I read i could use this chkconfig httpd on But this is only for apache could i do this chkconfig varnish on Finally when i do y usual start of httpd , i am asked for my api key for SSL , am i able to incorporate this into resarting both varnish and httpd on start up. Or am i doomed to run this command everytime i resart

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  • Oracle forms API - c-based compile error

    - by ShoeLace
    i am trying to compile a c-based forms api program on Linux x86_64 using command gcc -m32 -I"$ORACLE_HOME/forms/api" -L"$ORACLE_HOME/forms/lib" -L"$ORACLE_HOME/lib" -ld2f fapi.c it fails with a bunch of undefined references. $ORACLE_HOME/lib/libd2f.so: undefined reference to `sifom' $ORACLE_HOME/lib/libd2f.so: undefined reference to `idfrsti' $ORACLE_HOME/lib/libd2f.so: undefined reference to `simmal' etc... does anyone know the list of all the library files i need to add?

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  • Eclipse JFace TreeViewer level auto expansion doesn't work

    - by tamm0r
    According to the Eclipse documentation TreeViewer.setAutoExpandLevel(3) means that top-level elements are expanded, and their children, but not grandchildren. I used that in my code, but after setting the input the tree is not auto-expanded, neither on OS X nor on Linux. Expanding the tree manually (via mouse) works flawlessly. Am I missing anything?

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  • Convert a post-order binary tree traversal index to an level-order (breadth-first) index

    - by strfry
    Assuming a complete binary tree, each node can be adressed with the position it appears in a given tree traversal algorithm. For example, the node indices of a simple complete tree with height 3 would look like this: breadth first (aka level-order): 0 / \ 1 2 / \ / \ 3 4 5 6 post-order dept first: 6 / \ 2 5 / \ / \ 0 1 3 4 The height of the tree and an index in the post-order traversal is given. How can i calculate the breadth first index from this information?

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  • Zend_Services_Twitter, change the API Source name

    - by favo
    Hi, I am sending tweets to Twitter via Zend_Service_Twitter. The tweets appear with a note "via API". I want to set the API Source with a different name, is there already a functionality within the Zend Framework to change it? Or do I need to subclass to get this functionality? Thanks!

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  • Pretty Pixel-level Picture Painting, Programatically

    - by dreeves
    My mac laptop has 1,024,000 pixels. What's the simplest way to turn my display completely black and go nuts with writing little programs to twiddle pixels to my heart's delight? To make it more concrete, say I wanted to implement the Chaos Game to draw a Sierpinski triangle, at the pixel level, with nothing else on the screen. What are ways to do that?

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  • Workaround for API limits [closed]

    - by blunders
    Problem: Planning on building out a client services company that requires access to APIs. Most APIs are limited based on user, IP, etc. - and even though the API calls would be on a per client basis, there's no way to get usage not tied to IPs. (Theoretical) Solution: Have each client install on their network a proxy/VPN that would allow my systems to connect and use their assigned usage. So, it's possible there's a better solution than the one I've thought of, but it's the only one I've been able to come up with.

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