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  • Creating an OpenGL FPS camera: I have the position and orientation vectors, now what?

    - by Synthetix
    I have been struggling to create a first person camera in OpenGL ES 2.0 without using gluLookAt(). I grab the camera's orientation vectors (the way it's looking) from the current modelview matrix, and use that to calculate the new forward/backward (Z) translation value. I then calculate the strafe (X) value from the dot product of Z and Y (which is always 1.0). So, I have all the information I need to create a view matrix, but how do I do that without using gluLookAt? Almost all the examples I've seen use gluLookAt, but no such function exists in OpenGL ES 2.0. Besides, one of the moderators on cprogramming.com mentioned that gluLookAt is not appropriate for FPS cameras: http://cboard.cprogramming.com/game-programming/135390-how-properly-move-strafe-yaw-pitch-camera-opengl-glut-using-glulookat.html I am really confused by all the conflicting information I'm getting. I just want to create a first person camera that goes forward (W,S keys), side-to-side (A,D keys) and rotates around its center (Y axis only), Wolfenstein style. Any help on this would be much appreciated!

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  • Dicas do C# 4 consumindo uma DLL da Daruma com o mestre Claudenir

    - by renatohaddad
    Olá pessoal, recentemente tive o prazer de compartilhar o conhecimento com o time de desenvolvedores da Daruma e o Claudenir me convidou para gravar este vídeo mostrando como usar alguns recursos de parâmetros opcionais e expressões Lammmmmmbda no C# 4.O código contou com a presença do Felipe, da equipe da Daruma, o qual me mostrou quais métodos poderiamos consumir. Como não conheço nada da DLLs deles, o Felipe indicou quais poderíamos consumir retornando dados, então montamos uma coleção com Genérics e aplicamos lambda para extrair infos.Confira o vídeo em http://www.youtube.com/darumadeveloper#p/u/0/Ps2ddDYhkPUAbração.

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  • How do I set up a double domain like domain2.mydomain.com and mydomain.com?

    - by kdavis8
    I would like to set up a server similar to Google's. Their domain acts like a double domain, like you can use these URLS, "play.Google.com" or "apps.Google.com", to go to different sites.. For example, my domain would now be "my_domain.com" but i would like another one to be "domain2.my_domain.com". My question is,what is this officially called and how do i set it up? I'm not sure if you need two servers or just 1;

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  • Where can I download list of all .com domains registered in the world

    - by John
    I just need registered .com domain names. I know this list is available at: http://www.verisigninc.com/en_US/products-and-services/domain-name-services/grow-your-domain-name-business/tld-zone-access/index.xhtml ( looks like it could take 4 weeks for approval) http://www.premiumdrops.com/zones.html Also I can extract domain names using domain search API at domaintools.com Is there any other source where I can find this list?

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  • Err http://extras.ubuntu.com precise Release.gpg

    - by bell
    updating gives the ff: Ign cdrom://Ubuntu 11.10 _Oneiric Ocelot_ - Release amd64 (20111012) oneiric InRelease Ign cdrom://Ubuntu 11.10 _Oneiric Ocelot_ - Release amd64 (20111012) dists/oneiric/main/binary- / InRelease Ign cdrom://Ubuntu 11.10 _Oneiric Ocelot_ - Release amd64 (20111012) dists/oneir Err http://archive.canonical.com oneiric Release.gpg Unable to connect to archive.canonical.com:http Err http://security.ubuntu.com precise-security/universe Translation-en_US Unable to connect to security.ubuntu.com:http:

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  • Using both .co.uk and .com domain

    - by Mantorok
    We presently have a .co.uk domain that has been live now for around 9-10 months, recently the .com version of this domain has become available and we've purchased based on reading that suggests you should try and go for .com where possible. My issue now is, what should I do with the .com? Should I use this in favour of the .co.uk or use both? I'm concerned that rankings might be affected if I completely replace the .co.uk with the .com. Any suggestions?

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  • Opengl-es picking object

    - by lacas
    I saw a lot of picking code opengl-es, but nothing worked. Can someone give me what am I missing? My code is (from tutorials/forums) Vec3 far = Camera.getPosition(); Vec3 near = Shared.opengl().getPickingRay(ev.getX(), ev.getY(), 0); Vec3 direction = far.sub(near); direction.normalize(); Log.e("direction", direction.x+" "+direction.y+" "+direction.z); Ray mouseRay = new Ray(near, direction); for (int n=0; n<ObjectFactory.objects.size(); n++) { if (ObjectFactory.objects.get(n)!=null) { IObject obj = ObjectFactory.objects.get(n); float discriminant, b; float radius=0.1f; b = -mouseRay.getOrigin().dot(mouseRay.getDirection()); discriminant = b * b - mouseRay.getOrigin().dot(mouseRay.getOrigin()) + radius*radius; discriminant = FloatMath.sqrt(discriminant); double x1 = b - discriminant; double x2 = b + discriminant; Log.e("asd", obj.getName() + " "+discriminant+" "+x1+" "+x2); } } my camera vectors: //cam Vec3 position =new Vec3(-obj.getPosX()+x, obj.getPosZ()-0.3f, obj.getPosY()+z); Vec3 direction =new Vec3(-obj.getPosX(), obj.getPosZ(), obj.getPosY()); Vec3 up =new Vec3(0.0f, -1.0f, 0.0f); Camera.set(position, direction, up); and my picking code: public Vec3 getPickingRay(float mouseX, float mouseY, float mouseZ) { int[] viewport = getViewport(); float[] modelview = getModelView(); float[] projection = getProjection(); float winX, winY; float[] position = new float[4]; winX = (float)mouseX; winY = (float)Shared.screen.width - (float)mouseY; GLU.gluUnProject(winX, winY, mouseZ, modelview, 0, projection, 0, viewport, 0, position, 0); return new Vec3(position[0], position[1], position[2]); } My camera moving all the time in 3d space. and my actors/modells moving too. my camera is following one actor/modell and the user can move the camera on a circle on this model. How can I change the above code to working?

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  • OpenGL ES 2 jittery camera movement

    - by user16547
    First of all, I am aware that there's no camera in OpenGL (ES 2), but from my understanding proper manipulation of the projection matrix can simulate the concept of a camera. What I'm trying to do is make my camera follow my character. My game is 2D, btw. I think the principle is the following (take Super Mario Bros or Doodle Jump as reference - actually I'm trying to replicate the mechanics of the latter): when the caracter goes beyond the center of the screen (in the positive axis/direction), update the camera to be centred on the character. Else keep the camera still. I did accomplish that, however the camera movement is noticeably jittery and I ran out of ideas how to make it smoother. First of all, my game loop (following this article): private int TICKS_PER_SECOND = 30; private int SKIP_TICKS = 1000 / TICKS_PER_SECOND; private int MAX_FRAMESKIP = 5; @Override public void run() { loops = 0; if(firstLoop) { nextGameTick = SystemClock.elapsedRealtime(); firstLoop = false; } while(SystemClock.elapsedRealtime() > nextGameTick && loops < MAX_FRAMESKIP) { step(); nextGameTick += SKIP_TICKS; loops++; } interpolation = ( SystemClock.elapsedRealtime() + SKIP_TICKS - nextGameTick ) / (float)SKIP_TICKS; draw(); } And the following code deals with moving the camera. I was unsure whether to place it in step() or draw(), but it doesn't make a difference to my problem at the moment, as I tried both and neither seemed to fix it. center just represents the y coordinate of the centre of the screen at any time. Initially it is 0. The camera object is my own custom "camera" which basically is a class that just manipulates the view and projection matrices. if(character.getVerticalSpeed() >= 0) { //only update camera if going up float[] projectionMatrix = camera.getProjectionMatrix(); if( character.getY() > center) { center += character.getVerticalSpeed(); cameraBottom = center + camera.getBottom(); cameraTop = center + camera.getTop(); Matrix.orthoM(projectionMatrix, 0, camera.getLeft(), camera.getRight(), center + camera.getBottom(), center + camera.getTop(), camera.getNear(), camera.getFar()); } } Any thought about what I should try or what I am doing wrong? Update 1: I think I updated every value you can see on screen to check whether the jittery movement is affected by that, but nothing changed, so something must be fundamentally flawed with my approach/calculations.

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  • SSL/https setup for herokuapp.com address rather than my actual domain

    - by new2ruby
    I have a subdomain of my site pointed to a rails app at mysite.herokuapp.com. I bought a certificate from godaddy and seem to have that all set up correctly. So that when I go to: http://mysite.herokuapp.com or http://dev.mysite.com it's redirected to: https://mysite.herokuapp.com or https://dev.mysite.com The problem is that when I visit dev.mysite.com, I get the error: Safari can't verify the identity of the website. But when I go to mysite.herokuapp.com, I don't get the error. I wanted this to be set up the other way, so that dev.mysite.com did not cause the error. I'm not sure where I went wrong. I used dev.mysite.com when generating the key and when setting it up at godaddy.com. Any ideas where I should look? P.S. The old site is hosted at dreamhost and the DNS info is stored there as well. So I created a subdomain there of type cname which points to mysite.herokuapp.com.

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  • Where can I find an iPhone OpenGL ES Example that responds to touch?

    - by Jamey McElveen
    I would like to find an iPhone OpenGL ES Example that responds to touch. Ideally it would meet these requirements: Displays a 3D object in the center of the screen like a cube Maps a texture to the cube surfaces Should move the camera around the cube as you drag your finger Should zoom the camera in and out on the cube by pinching Optionally has a background behind the cube that wraps around the back of the camera.(for example this could create the effect of the cube being in space) Has anyone seen one or more examples that can do these or at least render the cube with the texture?

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  • Does mixing Quartz and OpenGL-ES cause big performance degrade??

    - by Eonil
    I have a plan to make a game using OpenGL for 3D world view, and CALayer(or UIView) for HUD UI. It's easy to imagine performance degrade from mixing them, but the document which mention this impact disappeared: http://developer.apple.com/iphone/library/technotes/tn2008/tn2230.html I cannot find the document on current version of SDK reference. And I got this document: http://gamesfromwithin.com/gdc-2010-the-best-of-both-worlds-using-uikit-with-opengl If you experienced about this, please let me know about performance impact on current SDK.

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  • How does the OpenGL ES template work for the iPhone?

    - by thyrgle
    So, I've been trying to figure out why the square is moving up and down the iPhone simulator when Build and Go the template that Apple provides for OpenGL ES. I don't understand why for example they have ES1Render.m, and ES2Render.m instead of just one ESRender.m. Also, where is the equivalent of the glutDisplayFunc, and glutTimerFunc? Thanks in advance.

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  • Problem enabling OpenGL ES depth test on iPhone. What steps are necessary?

    - by Chris Cooper
    I remember running into this problem when I started using OpenGL in OS X. Eventually I solved it, but I think that was just by using glut and c++ instead of Objective-C... The lines of code I have in init for the ES1Renderer are as follows: glEnable(GL_DEPTH_TEST); glDepthFunc(GL_LEQUAL); Then in the render method, I have this: glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); I assume I'm missing something specific to either the iPhone or ES. What other steps are required to enable the depth test? Thanks

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  • ServerAlias www.example.com is not recognized

    - by Tianzhou Chen
    Below is my config file: NameVirtualHost 12.34.56.78:80 < VirtualHost 12.34.56.78:80 ServerAdmin admin@domain1.com ServerName domain1.com ServerAlias www.domain1.com DocumentRoot /srv/www/domain1.com/public_html1/ ErrorLog /srv/www/domain1.com/logs/error.log CustomLog /srv/www/domain1.com/logs/access.log combined < /VirtualHost < VirtualHost 12.34.56.78:80 ServerAdmin admin@domain2.com ServerName domain2.com ServerAlias www.domain2.com DocumentRoot /srv/www/domain2.com/public_html1/ ErrorLog /srv/www/domain2.com/logs/error.log CustomLog /srv/www/domain2.com/logs/access.log combined < /VirtualHost The thing is when I put www.domain1.com into browser, apache2 doesn't retrieve the web page resides in /srv/www/domain1.com/public_html1/, instead, it gets the page from the default document root defined in another file. However, if I put www.domain2.com, everything works fine. I don't see any difference between two VirtualHost config block, so I wonder what does make the difference. BTW, I haven't put any .htaccess file under their document root. Thanks for your advice! Tianzhou

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  • How to free member (i.e BSTR, SAFEARRAY, VARIANT) of an IDL User Defined Structure which is encapsul

    - by Picaro De Vosio
    Hi, I have a structure defined in IDL. This structure has following members: { BSTR m_sFirst; BSTR m_sSecond; VARIANT m_vChildStruct; //This member encapsulate a sub structure SAFEARRAY __RPC_FAR * m_saArray; }CustomINFO; I am allocating the memory for the structs using CoTaskMemAlloc and encapsulating it in Variant as follows: vV-vt = VT_RECORD; vV-pvRecord = pStruct; //Pointer of sturct vV-pRecInfo = pRI; //RecordInfo Interface Is it enough to call VariantClear to deallocate the memory of struct and its members? Will it also release the IRecordInfo interface? Or i have to manually get the encapsulated struct and deallocate each member myself and then use CoTaskMemFree to deallocate sturct. Thanks Picaro De Vosio

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  • SEO consequences for merging country sites in a .com

    - by Pekka
    I am in the process of refactoring a number of rental portals I've built for a company with locations in Austria, Germany, Switzerland, and the Netherlands. Instead of the current setting of each country site running under its own domain name: www.companyname.de www.companyname.ch www.companyname.at I would love to merge them all in this way: www.companyname.com/de www.companyname.com/ch www.companyname.com/at with the country TLDs doing a 301 redirect to the respective .com address. However, I have been repeatedly told not to do this due to likely problems with SEO - the business is very SEO dependent, and being a rental chain, needs to be strong in local results. So the question is: Is there an unavoidable hit in Search Engine Optimization when redirecting to a central .com domain? What measures can be taken to soften the blow? What comes to my mind is explicitly specifying a lang attribute in the html tag. Are there any other ways to specifically point out geographical location for sub-directories?

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  • SEO consequences for merging country sites in a .com

    - by Pekka
    I am in the process of refactoring a number of rental portals I've built for a company with locations in Austria, Germany, Switzerland, and the Netherlands. Instead of the current setting of each country site running under its own domain name: www.companyname.de www.companyname.ch www.companyname.at I would love to merge them all in this way: www.companyname.com/de www.companyname.com/ch www.companyname.com/at with the country TLDs doing a 301 redirect to the respective .com address. However, I have been repeatedly told not to do this due to likely problems with SEO - the business is very SEO dependent, and being a rental chain, needs to be strong in local results. So the question is: Is there an unavoidable hit in Search Engine Optimization when redirecting to a central .com domain? What measures can be taken to soften the blow? What comes to my mind is explicitly specifying a lang attribute in the html tag. Are there any other ways to specifically point out geographical location for sub-directories?

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  • Wordpress.com : les attaques subies par la plate-forme provenaient de Chine, les motivations seraient commerciales

    Wordpress.com : les attaques par déni de service provenaient de Chine Les motivations seraient commerciales Les attaques par Déni de Service de la fin de la semaine passée, les plus violentes jamais subies par la plateforme de blogues Wordpress.com, auraient eu comme point de départ la Chine et non pas le Moyen-Orient comme le laissaient entendre certains analystes. Les motivations des auteurs de ces attaques seraient par ailleurs commerciales et non pas politiques d'après les dernières déclarations à la presse des responsables d'Automattic, la société qui gère la plateforme aux 18 millions de sites. Automattic aurait découvert, en analysant la seconde attaque surv...

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  • Salon LesJeudis.com : plus de 500 postes IT à pourvoir le jeudi 21 juin à Marseille

    Salon LesJeudis.com : plus de 500 postes IT à pourvoir Le jeudi 21 juin à Marseille LesJeudis.com organise un nouveau salon de recrutement ce jeudi 21 juin au Parc Chanot de Marseille de 10h à 18h. Une initiative bienvenue pour tous les développeurs qui recherchent un emploi ou un nouveau poste. Plus de 500 postes seront à pourvoir. Chaque candidat aura la possibilité de soumettre son profil à un consultant en ressources humaines pour affiner sa stratégie d'attaque. Parmi les nombreuses entreprises qui seront à la recherche de candidats citons Altran, Osiatis ou Smile. [IMG]http:/...

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  • Calling Excel from PHP 5 through COM fails on Windows 7 when Apache started through Task Planner

    - by Stefan Pantke
    I currently write an application, which controls Excel through COM: The app creates a COM-based Excel instance, opens some XLS files and reads their contents. Scenario I On Windows 7, I start Apache and mySQL using xmapp-control with system administrator rights. All works as expected. The PHP-based controller script interacts with Excel as expected. Scenario II A problem appears, if I start Apache and mySQL as 'background jobs'. Here is how: I created two jobs using Windows 7 Task Planner. One runs apache_start.bat, the other runs mysql_start.bat. Both tasks run as SYSTEM with elevated privileges when Windows 7 boots. Apache and mySQL work as expected. Specifically, Apache serves HTTP request from clients and PHP is able to talk to mySQL. When I call the PHP controller, which calls and interacts with Excel using COM, I do receive an error. The error seems to come from Excel [not COM itself] and reads like this: Excel can't read the XLS-file Excel failed to save the file due to an ill-name worksheet Interestingly, during the first run of the PHP-based controller script, it takes a few seconds to render the error message. Each subsequent run immediately renders the error message. Windows system logs didn't show a single problem report entry. Note, that the PHP program and the Apache instance didn't change - except the way Apache was started. At least the PHP controller script is perfectly able to read the file-system, since it provides the pathes to the XLS-file through scandir() of a certain directory. Concurrency issues can't be the cause of the problem. A single instance of the specific PHP controller interacts with Excel. Question Could someone provide details, why this happens?

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