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  • Determining if and where a photon will collide with a polygon in 3D space.

    - by Peter
    The problem is straight forward: 1) We have a photon traveling from Point 1 (x,y,z) to Point 2 (x,y,z), both of which could be located anywhere in 3D space. 2) We have a polygon that is both rotated randomly on the x-axis and/or y-axis and also located anywhere in 3D space. 3) We want to find: a) if the photon will collide with the polygon at all and b) if it does where will that be (x,y,z)? An image of the problem: http://dl.dropbox.com/u/3150177/Programming/3D/Math/Photon%20Path/Photon%20Path.png The aim of this is to calculate how the photon's path should be altered from an interaction(s) with the polygon(s). I am reading up on this subject now but I was wondering if anyone could give me a head start. Thanks in advance.

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  • Première sortie pour Android 3, le successeur d'Android 2.3 intégrera une version 3D des Google Maps

    Premières sortie pour Android 3 Le successeur d'Android 2.3 intégrera une version 3D des Google MapsLors de la conférence Dive Into Mobile qui se déroule actuellement, Andy Rubin, en charge du développement d'Android, a fait lors de sa keynote une démonstration de la future version d'Android (3.0, alias Honeycomb) sur une tablette Motorola.Le fait marquant de cette présentation (l'UI pour l'instant épurée n'ayant été qu'entraperçue) fut la démonstration de la future version de Google Maps qui sortira dans les jours avenir.De cette présentation il ressort qu'au menu de la prochaine mise à jour de Google Maps nous aurons : le chargement beaucoup plus rapide des cartes ; la gestion de l'affichage de...

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  • View Images and Videos in 3D in Firefox

    - by Asian Angel
    Different websites have their own format for viewing images and videos, but may not be a lot of fun to use. The Cooliris extension for Firefox lets you view those same images and videos in a dynamic 3D format. Before For our example we conducted a search for nature photos at Flickr. You could view them in a static format or even as a slideshow but what about something more dynamic looking? After As soon as the extension has finished installing, you will notice a new toolbar button used for launching the Cooliris tab. When you launch the Cooliris tab you will have an expandable menu system in the upper left corner. A speed dial setup in the center. And a small toolbar in the lower right corner Before going further you should check and make any desired adjustments in the preferences to enhance your viewing experience. In the upper right corner you can start your search by selecting from the available sources. The same search for nature images is more focused and clean looking this time. Clicking on an image will bring it forward and enlarge it. You can use the slider tool at the bottom of the tab to browser left or right through the images and videos. And when you find one that interests you, click on the popout button to open it in a new tab. Conclusion The Cooliris extension makes viewing images and videos fun and interactive with its’ 3D style format. Links Download the Cooliris extension (Mozilla Add-ons) Download Cooliris for Firefox, Internet Explorer, Safari (Mac Only), & Chrome Similar Articles Productive Geek Tips Make Firefox Display Large Images Full SizeInstalling Windows Media Player Plugin for FirefoxStop YouTube Videos from Automatically Playing in FirefoxShare Text & Images the Easy Way with JustPaste.itEasily View Source of Included Files in Firefox TouchFreeze Alternative in AutoHotkey The Icy Undertow Desktop Windows Home Server – Backup to LAN The Clear & Clean Desktop Use This Bookmarklet to Easily Get Albums Use AutoHotkey to Assign a Hotkey to a Specific Window Latest Software Reviews Tinyhacker Random Tips VMware Workstation 7 Acronis Online Backup DVDFab 6 Revo Uninstaller Pro FetchMp3 Can Download Videos & Convert Them to Mp3 Use Flixtime To Create Video Slideshows Creating a Password Reset Disk in Windows Bypass Waiting Time On Customer Service Calls With Lucyphone MELTUP – "The Beginning Of US Currency Crisis And Hyperinflation" Enable or Disable the Task Manager Using TaskMgrED

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  • Custom shadow mapping in Unity 3D Free Edition

    - by nosferat
    Since real time hard and soft shadows are Unity 3D Pro only features I thought I will learn Cg programming and create my own shadow mapping shader. But after some digging I found that the shadow mapping technique uses depth textures, and in Unity depth values can be accessed through a Render Texture object, which is Unity Pro only again. So is it true, that I cannot create real time shadow shaders as a workaround to the limitations of the free version?

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  • Scorched 3D is one hot battle game

    <b>Sourceforge:</b> "Scorched 3D is a modernization of the classic DOS game Scorched Earth. It's a simple turn-based artillery game and a real-time strategy game in which players can counter each other's weapons with creative accessories, shields, and tactics."

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  • Sun Blade 6000 Interactive 3D Demo

    - by ferhat
    Three dimensional  fly-by demos of Sun systems are available from your everyday Java-enabled browsers. Oracle's flexible, eco-efficient Sun Blade 6000 chassis integrates Oracle's x86 and SPARC server blade modules with high-capacity networking and storage blades to support a wide range of application environments.  Click on the static picture below to enter the interactive 3D demo mode: Visit Oracle Technology Network pages and product pages for more information on Oracle's Sun Blades Servers.   

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  • Basic tutorial/introduction for 3d matrices, idealy in c++, without openGl or directX

    - by René Nyffenegger
    I am wondering if there is a simple tutorial that covers the basics of how to initialize rotation, translation and projection matrices, and how to multiply them, and how to get the screen coordinates afterwards for a 3d point. Idealy, the tutorial comes with compilable code and is not dependent on any 3rd party library. Searching the internet, I found lots of tutorials, so this is not the problem. Yet, it seemed all of these either covered openGl or directX, or they were theoretical in nature.

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  • Calculating 2D (screen) coordinates from 3D positions in XNA 4.0

    - by NDraskovic
    I have a program that draws some items to the scene by loading their positions from a file. Now I want to place a Ray on the same location where the items are drawn. So my question is how can I calculate the position of the ray (it's 2D components) by using 3D coordinates of each particular item? The items don't move anywhere, so once they are placed they stay until the end of the programs execution. Thanks.

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  • Android Swipe In Unity 3D World with AR

    - by Christian
    I am working on an AR application using Unity3D and the Vuforia SDK for Android. The way the application works is a when the designated image(a frame marker in our case) is recognized by the camera, a 3D island is rendered at that spot. Currently I am able to detect when/which objects are touched on the model by raycasting. I also am able to successfully detect a swipe using this code: if (Input.touchCount > 0) { Touch touch = Input.touches[0]; switch (touch.phase) { case TouchPhase.Began: couldBeSwipe = true; startPos = touch.position; startTime = Time.time; break; case TouchPhase.Moved: if (Mathf.Abs(touch.position.y - startPos.y) > comfortZoneY) { couldBeSwipe = false; } //track points here for raycast if it is swipe break; case TouchPhase.Stationary: couldBeSwipe = false; break; case TouchPhase.Ended: float swipeTime = Time.time - startTime; float swipeDist = (touch.position - startPos).magnitude; if (couldBeSwipe && (swipeTime < maxSwipeTime) && (swipeDist > minSwipeDist)) { // It's a swiiiiiiiiiiiipe! float swipeDirection = Mathf.Sign(touch.position.y - startPos.y); // Do something here in reaction to the swipe. swipeCounter.IncrementCounter(); } break; } touchInfo.SetTouchInfo (Time.time-startTime,(touch.position-startPos).magnitude,Mathf.Abs (touch.position.y-startPos.y)); } Thanks to andeeeee for the logic. But I want to have some interaction in the 3D world based on the swipe on the screen. I.E. If the user swipes over unoccluded enemies, they die. My first thought was to track all the points in the moved TouchPhase, and then if it is a swipe raycast into all those points and kill any enemy that is hit. Is there a better way to do this? What is the best approach? Thanks for the help!

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  • 2D mouse coordinates from 3d object projection

    - by user17753
    Not entirely certain of the nomenclature here -- basically, after placing a model in world coordinates and setting up a 3D camera to look at it the model has been projected onto the screen in a 2D fashion. What I'd like to do is determine if the mouse is inside the projected view of the model. Is there a way to "unproject" in the XNA framework? Or what is this process called as, so that I can better search for it?

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  • Sortie de Flash Player 11.4, parallélisation des tâches et accélération 3D au premier plan

    Sortie de Flash Player 11.4 Parallélisation des tâches et accélération 3D au premier plan Adobe vient d'annoncer la sortie de Flash Player 11.4. Diverses anomalies et failles ont été corrigés, dont le bogue rencontré par les utilisateurs de Firefox sous Windows 7, qui occasionnait la perte du focus sous certaines circonstances. Adobe a publié un bulletin de sécurité recensant 6 vulnérabilités critiques (corruption de mémoire, buffer overflow et fuite d'informations interdomaines). [IMG]http://flash.developpez.com/ressources/logo_accueil.gif[/IMG] Côté fonctionnalités, cette nouvelle mise à jour apporte les améliorations suivantes ...

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  • Présentation des projets de la rubrique 2D / 3D / Jeux : huit jeux ont attiré notre attention

    Bonjour, La rubrique 2D / 3D / Jeux accueille de nombreux projets de création de jeux vidéo. Nous avons souhaité mettre en avant quelques uns d'entre eux et ce n'est pas pas moins de huit projets que nous présentons aujourd'hui. Il y en a pour tous les goûts : parmi eux, nous pouvons compter un remake évolué de Bomberman, un puzzle game, un jeu de stratégie, ... Nous vous souhaitons une bonne lecture....

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  • How can teams collaborate on Unity 3D projects?

    - by nosferat
    With a friend of mine, we are planning to develop a small game to get the hang of game development and teamwork. But since Unity 3D barely supports version control (or at least the free version lacks of it) we have no idea how to efficiently manage teamwork. Sharing tasks in a small project is also seems like a challange for us. I would also appreciate any advice that could be useful for beginner indie developers related to teamwork. :)

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  • How to draw a spotlight in 3D

    - by RecursiveCall
    To be clear, I am not talking about the light result (the lit area) but the spotlight itself, like this The two common suggestions that I tried are 2D image and a 3D cone. The problem with the pre-regenerated 2D image is that it always look 2D and flat no matter how it is rotated in world space. The cone on the other hand is next to impossible to control when it comes to fade distance, it doesn't look soft (smooth) and it is expensive to compute.

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  • Will I have an easier time learning OpenGL in Pygame or Pyglet? (NeHe tutorials downloaded)

    - by shadowprotocol
    I'm looking between PyGame and Pyglet, Pyglet seems to be somewhat newer and more Pythony, but it's last release according to Wikipedia is January '10. PyGame seems to have more documentation, more recent updates, and more published books/tutorials on the web for learning. I downloaded both the Pyglet and PyGame versions of the NeHe OpenGL tutorials (Lessons 1-10) which cover this material: lesson01 - Setting up the window lesson02 - Polygons lesson03 - Adding color lesson04 - Rotation lesson05 - 3D lesson06 - Textures lesson07 - Filters, Lighting, input lesson08 - Blending (transparency) lesson09 - 2D Sprites in 3D lesson10 - Moving in a 3D world What do you guys think? Is my hunch that I'll be better off working with PyGame somewhat warranted?

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  • Where can I buy freely redistributable (creative commons) game assets?

    - by Erlend
    I'd like to know about any 3D asset shops out there that specialize in game assets and, most importantly, license their assets under an open license like Creative Commons or similarly permissive. We are looking to buy some professional looking assets for use and redistribution with our open source 3D game engine. The problem is that all the commercial 3D assets we've come by are only sold under very restrictive licenses, which won't allow us to include the models in our code repository (since free code hosting repositories require that all your data, including media, is open source or otherwise copyleft) nor in turn redistribute the assets as part of our downloadable SDK. I realize this sounds like a weak business idea, since users could just buy the asset and start sharing it with everyone. But somehow this has worked for hundreds of WordPress theme shops, so I was hoping maybe someone's trying similar things for commercial game assets.

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  • What exactly is UV and UVW Mapping?

    - by Michael Stum
    Trying to understand some basic 3D concepts, at the moment I'm trying to figure out how textures actually work. I know that UV and UVW mapping are techniques that map 2D Textures to 3D Objects - Wikipedia told me as much. I googled for explanations but only found tutorials that assumed that I already know what it is. From my understanding, each 3D Model is made out of Points, and several points create a face? Does each point or face have a secondary coordinate that maps to a x/y position in the 2D Texture? Or how does unwrapping manipulate the model? Also, what does the W in UVW really do, what does it offer over UV? As I understand it, W maps to the Z coordinate, but in what situation would I have different textures for the same X/Y and different Z, wouldn't the Z part be invisible? Or am I completely misunderstanding this?

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  • 2d shapes in XNA 4.0?

    - by Lautaro
    Having some experience of XNA but none of 3D programming. I have an idea i want to realize but i have not decided to do it in 3d or 2d. Im not sure which one will be best in XNA. I want to have a shape like a blob that can reshape depending on input. The morphing does not need to be very advanced. It could be a circle (2d) or globe (3d) that just has one point that moves slightly in a random direction. In ASP.NET i have made this through the 2d Draw classes where i can make lines, circles, squares etc and then modify the points that makes them up. But it seems to me that XNA does not have classes for making 2d shapes (can i get this confirmed?). If it had, then this would be the quickest solution for me.

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  • Depth is disabled - How to turn on?

    - by marc wellman
    In XNA 3.1 is there any other way to disable depth in 3D Worlds using DirectX models other than GraphicsDevice.RenderState.DepthBufferEnable = false; ? The reason for my question is I have quite a huge program which offers a 3D World with a couple of 3D DirectX models inside. Depth was never an issue since it ever worked fine but since a few days after doing some modifications my models are all depth-translucent i.e. depth-buffering and/or culling seems to be disabled. But in my whole source code I never touch any of the options related to Depth or Culling which means I never turn these settings on explicitly nor turn it off somewhere. So I am searching for some other statement maybe related to the GraphicsDevice that implicitly turns depth off - but I can't find it. (Sorry that I don't post any source code but I have too much source code and I simply don't know where to search) UPDATE: These are a couple of simple objects seen with correct depth. These are the same objects in their current state.

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  • 3D in Windows 7 on Thinkpad R51

    - by John W.
    I installed Windows 7 on my laptop, and now the 3D doesn't work. According to dxdiag DirectX 11 is installed, but when I open up World of Warcraft, this error comes up. World of Warcraft World of Warcraft was unable to start up 3D acceleration. Please make sure DirectX 9.0c is installed and your video drivers are up-to-date. There are no alerts from Windows to update any drivers. Why doesn't the 3D work?

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  • CVE-2011-3192 and CVE-2011-0419 affect Oracle Secure Global Desktop

    - by chandan
    CVE DescriptionCVSSv2 Base ScoreComponentProduct and Resolution CVE-2011-0419 Resource Management Errors vulnerability 4.3 Apache HTTP Server Oracle Secure Global Desktop 4.62 CVE-2011-3192 Resource Management Errors vulnerability 7.8 This notification describes vulnerabilities fixed in third-party components that are included in Sun's product distribution.Information about vulnerabilities affecting Oracle Sun products can be found on Oracle Critical Patch Updates and Security Alerts page.

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