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• Is there a standard way to store 3D meshes to easily communicate between libraries?

  - by awiebe

  In a 3D game lots of different systems need to know about geometry data, however the only way they seem to be able to agree to on in representing it by an array of triangles. Can anyone recommend a good geometry manipulation library that will allow me to easily integrate the drawing library(OpenGL), the physics engine(Bullet), Serialization(Several 3D file formats) and my own code(objective-c++). Focus on the a representation between the drawing library and the physics engine. Also if the library can triangulate a mesh definition that would be very helpful. My code can work around what exists already.

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• What can i use as a 3d Tile map editor?

  - by alfa64

  I need to make grid based levels with 3d models for a dungeon crawler ( as a recent example Legend of Grimrock), but i need to have several layers and place entities with properties and position, angle, etc. I was considering Tiled, using layers as height for each level, but it's very hard to work with and visualize. What can i use for this pourpose? The output format needs to be json, xml, or something i can use on my engine. Ideally i'd want something like Tiled with a 3d visualization/edit mode and support for loading models or at least some visual representation of them.

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• How to enable 3D acceleration under VMware workstation 8?

  - by Yan Zhou

  I saw there are similar questions, but I don't think they answer exactly my questions. Did anyone managed to get 3D acceleration work under VMWare workstation 8? I have VMware 8.01 installed on Ubuntu 11.10. The guest I am trying is also Ubuntu 11.10. I manually installed vmware-tools and it went well, except the X-config part was skipped as it said the distribution driver is used. The guest runs well but it seems fall back to 2D mode. Does any one has any idea how to enable 3D acceleration under VMWare workstaion with Linux guest?

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• Why can't I use Unity 3D on a ATI Mobility Radeon HD 4200 Series with FGLRX drivers?

  - by user88257

  With a brand new install of 12.04 on my Dell Inspiron M5030, Unity 3D appears to load everything but the icons in the top left, and I am unable to click on anything. Unity 2D seems to works fine however. I have done nothing except install Synaptic Package manager and follow this guide to install FGLRX Drivers under Settings ? Additional Drivers, the driver shows as installed and functioning. Also after running: /usr/lib/nux/unity_support_test -p, I get this: OpenGL vendor string: ATI Technologies Inc. OpenGL renderer string: ATI Mobility Radeon HD 4200 Series OpenGL version string: 3.3.11653 Compatibility Profile Context Not software rendered: yes Not blacklisted: yes GLX fbconfig: yes GLX texture from pixmap: yes GL npot or rect textures: yes GL vertex program: yes GL fragment program: yes GL vertex buffer object: yes GL framebuffer object: yes GL version is 1.4+: yes Unity 3D supported: yes I am unsure as to what the problem is. I have tried the non-proprietary drivers, I could not get them to work either, but I would be willing to try again.

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• How can I create a 3D model in Java without using modeling software?

  - by Galen Nare

  I am a lightly experienced game developer and this is my first time trying 3D objects in Java for the first time. I have been recently creating and updating games using AWT, Swing, and Graphics, but I want to delve farther into Java. I have looked into Java3D, but it's not what I want. I want to use Images and then crop the Image and place the respective textures in their respective places. I already know how to do the cropping and 2D Image editing, but how do I go 3D?

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• How to create a 3D world with 2D sprites similar to Ragnorak online?

  - by Romoku

  As far as I know Ragnorak Online is a 3D game world with 2D sprites overlayed. I would like to use this style in a game I am making in Unity, so I would like the player to be able to select little square tiles on the terrain. There are a couple routes I could take such as using a bunch of cubic polygons and linking them together or using one big map. The former approach doesn't seem to make any sense if the world is not flat as polygons wouldn't be reused often. The goal is to break down a 3D polygon into tiles which is heard to wrap my head around. I believe using something like an interval tree or array would be appropriate to store the rectangle grid, but how would I display a rectangle around the selection the player has his mouse over on the polygon terrain itself? Here is a screenshot. Here is a gameplay video. Here is the camera usage.

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• Love2D engine for Lua; What about 3D?

  - by shadowprotocol

  Lua has been really awesome to learn, it's so simple. I really enjoy scripting languages, and I had an equally enjoyable time learning Python. The Love engine, http://love2d.org/, is really awesome, but I'm looking for something that can handle 3D as well. Is there anything that accommodates 3D in Lua? I'm still intrigued by the particle system of LOVE anyway and may just turn my idea into a 2D project with Particle lighting :) EDIT: I removed comments about Python - I want this to be a Lua topic. Thanks

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• projective geometry: how do I turn a projection of a rectangle in 3D into a 2D view

  - by bonomo

  So the problem is that I have a 3D projection of a rectangle that I want to turn into 2D. That is I have a photo of a sheet of paper laying on a table which I want to transform into a 2D view of that sheet. So what I need is to get an undistorted 2D image by reverting all the 3D/projection transformations and getting a plain view of the sheet from the top. I happened to find some directions on the subject but they don't suggest an immediate instruction on how this can be achieved. It would be really helpful to get a step-by-step instruction of what needs to be done. Or, alternatively, a link on a resource that breaks it down to little details. Thank you

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• How to render a retro-like pixel graphics from 3d models?

  - by momijigari

  I was wondering if there's a possibility to render a retro-pixel-like graphics from 3d model in real time? I'm talking about the Starfarer-like graphics. I know it's hand drawn, and it's 2d. But if I need a 3d objects with the same aesthetics? I'm currently working with Flash. But I don't need any ready-solutions, I just want to understand the principle from any other platform if there is one. So if anybody met anything like this I would appreciate your help. (If it's not possible to do in real time, I could at least pre-render a sequence of sprites. It would be much better than creating hundreds of hand-drawn ones)

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• XNA: draw a sprite in 3d, is that possible?

  - by Heisenbug

  since now I always used sprited to draw in 2D: spriteBatch.Draw(myTexture, rectangle, color); (I suppose the texture is binded internally to 2 triangles and then scaled.) Now, I'm porting my game in 3D and I have to draw several planes (walls, floor, roof,..). Do I need to manually binding a texture to a geometry (for example using VertexPositionColorTexture with VertexBuffer and IndexBuffer), or is there any simpler way to do that? I'm looking for something like spriteBatch.Draw with the rectangle clip specified in 3d space: spriteBatch.Draw(myTexture, rectangleIn3D, color);

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• Retrieve the coordinates of the *occluding* (closest/drawn) pixels during 3D overlap, using OpenGL?

  - by Big Rich

  Hi, Sorry if the question is not worded well, I'm a new to both 3D and OpenGL. How could I go about obtaining the 3D coordinates of the occluding object, at the point where occlusion is happening (i.e. the 'intersection' of the object in front/closest to the screen)? Just to offer a [very] rudimentary, visual, example, if you were to form an index-finger cross, with your right hand closest to your face, I'd like to know the coordinates of the part of your right finger which obscures the other finger (obviously back within the OpenGL context - no jokers ;-) ). If there is a way to find out both about the occluder (hider) and the occluded (hidden) objects in OpenGL, then that would be of great use, also. Cheers Rich

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• i7 Windows 7 laptop or Macbook Pro 15" (For making 3D model and Animation)

  - by sppdhs

  Hi everyone, I'm thinking of buying a new laptop as my current one will be 5 years old next year and it currently gives me a blue screen everytime I run a heavy software to make 3D models and animation. Question is: Should I buy Macbook Pro or a Windows 7 laptop? I tried to research and some say that Windows would be better, especially because you can buy a very high spec laptop with cheaper price. While some other say Macbook Pro is the better choice as it can run bootcamp with windows 7 100% performance on every software even though it's a mac. Is this true? Which one is actually better? Btw, the software that I usually use is 3Ds Max, Maya, and ZBrush. To note as well, I have never used a Mac before. I've checked around some stores and budget wise, I'll need around AU$3000+ to buy a Macbook pro, and AU$2000+ to buy a windows laptop. Quite a big difference in price range. Thanks in advance for your help.

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• Cause for bad font rendering in Chrome?

  - by OverTheRainbow

  I notice that the text on some web pages look bad when viewed in Chrome (16.0.912.77 m) while OK with Firefox (10.0). FWIW, I'm using the Windows versions of those applications, with default settings. As an (ironic) example, www.google.com/webfonts. Does someone know why that is, and if something can be done about it? Thank you. Edit: Another example: Edit: Here's how it looks in FireFox:

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• Font rendering in Internet Explorer vs other browsers on Windows XP

  - by Ben McCormack

  I have four browsers installed on my Windows XP SP3 machine: Internet Explorer 8, Firefox 3.5, Safari 4, and Google Chrome. For whatever reason, fonts appeared to be rendered differently in IE than in the other browsers. It seems the fonts are anti-aliased in IE but not in the others. Why might this be? Is this an issue with the browsers or my operating system? I've noticed this issue on several Windows XP machines that I've used. While it may seem like no big deal, the lack of font smoothing in the other browsers keeps me from using them as my primary browser. Most importantly, what can I do to get the other browsers to render fonts smoothly?

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• Ubuntu Lucid (10.04) subpixel font rendering crashes Xorg

  - by user36066

  Hi everyone... I really don't know how to solve this on my own so I thought giving this site a chance. After upgrading to Lucid I ran into some problems. With some experimenting I came to a conclusion that if I enable subpixel smoothing on fonts the moment I start any other application not native to GTK+ (wine, openoffice, wxWidgets, ...) my X server crashes the same moment. At first this seemed like something went wrong during installation. To cut the long story short, after 3 clean installations and whole bunch of experimenting the same thing happens all over again. Strange thing is... if I configure any other font smoothing besides subpixel, everything works like it should. Any thoughs?

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• Triangle rendering problem in directX

  - by Himadri

  I am working with directX 9. I have a problem while rendering triangles using drawprimitive. The problem is - When I am rendering the whole object made of several triangles, the triangle having all points on a single line shows gap in a whole closed object. I am showing the image below. The white dashed line is the problem.

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• Page rendering time are not steady in IE6

  - by dan

  I have to support IE6 and I calculate rendering time by creating a timestamp in javascript at the beginning of the page and doing the difference when document.ready is fired in jQuery. If I do 3 pages load, the rendering times in milliseconds can look like this : page 1 : 735, 2672, 734 page 2 : 3063, 1516, 3375 page 3 : 8281, 2531, 3703 Why is that? How can I have more consistency?

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• Improved appointment rendering in RadScheduler for ASP.NET AJAX, Q1 2010

  Now that Q1 2010 release is out in the wild, we can sit down and discuss some of the changes we decided to make in the new release. One of them is the new appointment rendering of RadScheduler - a potentially breaking change, but a much needed one. If you have problems with your old custom skins, include the old base stylesheet along with your RadScheduler and set EnableEmbeddedBaseStylesheet=false in your RadScheduler. You can find the said base stylesheet attached to this post.   While trying to improve the performance of RadScheduler, I noticed that the number of resources slows down the rendering and overall performance considerably. This had to be expected - the images to support the appointment rounded corners (and the predefined resources) were quite large. However, I didnt take into account that all browsers keep for performance reasons their images uncompressed in memory and with the color depth of the current desktop. A simple calculation later I discovered that the appointment sprite itself is taking 25MB memory when loaded. Add 5 resources to the fray and you have 150MB memory down with a single blow. As it turns out - a sprite image is not a panacea, if it gets too big - dont be afraid to break it in two. The loading time may suffer, but your browser suffers more while rendering a 25MB monster. First I thought of undertaking the aforementioned solution - breaking the appointment sprite in two and thus reducing the two appointment sprites to mere 2MB uncompressed. Then I thought - the rounded corners are small - I can use borders and backgrounds to simulate rounded appointment borders while still keeping the same HTML structure. The gradients can be done with a single 10x50px image plus we have a gain - border colors and backgrounds can be changed on the fly.  I started with five rendering elements at first, then tried with four and finally I settled on only three elements.  Behold the new appointment rendering (quite simple really):       On the left you can see that the first container has only top and bottom borders and a background. In fact, the background isnt even needed since it will be obscured by the elements on top of it. The whole first container is only needed for the four dots that reside in the four corners of the appointment. On top of this container is another one that holds the left and right borders and slightly lighter background to create the illusion of a second lighter border beside the other two. At last on top of all others is placed the text container that also holds the top and bottom borders and the gradient background. On the right you can see the final result - Im quite happy with it and I hope you will be too. After creating the new rendering we took another step further - we decided to use alpha gradients for the resource rendering, thus supporting any color appointments with rounded corners and gradients. You can see some examples below:We plan on adding BorderColor and BackColor properties  to the ResourceStyles definitions for Q1 SP1. However with the new rendering in Q1 2010 we do support BackColor and BorderColor appointment properties - you only need to set AppointmentStyleMode=Default to keep RadScheduler from switching to Simple appointment rendering. Here is one screenshot of RadScheduler with appointments set to different colors: I hope that you will enjoy working with the new appointments in RadScheduler. RadScheduler base stylesheet Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• Improved appointment rendering in RadScheduler for ASP.NET AJAX, Q1 2010

  Now that Q1 2010 release is out in the wild, we can sit down and discuss some of the changes we decided to make in the new release. One of them is the new appointment rendering of RadScheduler - a potentially breaking change, but a much needed one. If you have problems with your old custom skins, include the old base stylesheet along with your RadScheduler and set EnableEmbeddedBaseStylesheet=false in your RadScheduler. You can find the said base stylesheet attached to this post.   While trying to improve the performance of RadScheduler, I noticed that the number of resources slows down the rendering and overall performance considerably. This had to be expected - the images to support the appointment rounded corners (and the predefined resources) were quite large. However, I didnt take into account that all browsers keep for performance reasons their images uncompressed in memory and with the color depth of the current desktop. A simple calculation later I discovered that the appointment sprite itself is taking 25MB memory when loaded. Add 5 resources to the fray and you have 150MB memory down with a single blow. As it turns out - a sprite image is not a panacea, if it gets too big - dont be afraid to break it in two. The loading time may suffer, but your browser suffers more while rendering a 25MB monster. First I thought of undertaking the aforementioned solution - breaking the appointment sprite in two and thus reducing the two appointment sprites to mere 2MB uncompressed. Then I thought - the rounded corners are small - I can use borders and backgrounds to simulate rounded appointment borders while still keeping the same HTML structure. The gradients can be done with a single 10x50px image plus we have a gain - border colors and backgrounds can be changed on the fly.  I started with five rendering elements at first, then tried with four and finally I settled on only three elements.  Behold the new appointment rendering (quite simple really):       On the left you can see that the first container has only top and bottom borders and a background. In fact, the background isnt even needed since it will be obscured by the elements on top of it. The whole first container is only needed for the four dots that reside in the four corners of the appointment. On top of this container is another one that holds the left and right borders and slightly lighter background to create the illusion of a second lighter border beside the other two. At last on top of all others is placed the text container that also holds the top and bottom borders and the gradient background. On the right you can see the final result - Im quite happy with it and I hope you will be too. After creating the new rendering we took another step further - we decided to use alpha gradients for the resource rendering, thus supporting any color appointments with rounded corners and gradients. You can see some examples below:We plan on adding BorderColor and BackColor properties  to the ResourceStyles definitions for Q1 SP1. However with the new rendering in Q1 2010 we do support BackColor and BorderColor appointment properties - you only need to set AppointmentStyleMode=Default to keep RadScheduler from switching to Simple appointment rendering. Here is one screenshot of RadScheduler with appointments set to different colors: I hope that you will enjoy working with the new appointments in RadScheduler. RadScheduler base stylesheet Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• In WPF 3D, why can't a perspective camera's LookDirection be straight down?

  - by DanM

  I'm attempting to position my perspective camera 30 units above the origin and pointing straight down. If I set the LookDirection of the camera to "0,0,-1", however, everything disappears. I have to make it "0.01,0.01,-1" for it to work. Why? <Window x:Class="ThreeDeeTester.Window1" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="Window1" Height="300" Width="300"> <Grid> <Viewport3D> <Viewport3D.Camera> <PerspectiveCamera Position="0,0,30" LookDirection="0.01,0.01,-1" UpDirection="0,0,1" /> <!-- LookDirection="0,0,-1" doesn't work...why? --> </Viewport3D.Camera> <ModelVisual3D> <ModelVisual3D.Content> <Model3DGroup> <DirectionalLight Color="White" Direction="1,-1,-1" /> <GeometryModel3D> <GeometryModel3D.Geometry> <MeshGeometry3D Positions="0,0,10 -5,-5,0 -5,5,0 5,5,0 5,-5,0" TriangleIndices="2 1 0 2 0 3 4 3 0 1 4 0" /> </GeometryModel3D.Geometry> <GeometryModel3D.Material> <DiffuseMaterial Brush="Red" /> </GeometryModel3D.Material> </GeometryModel3D> </Model3DGroup> </ModelVisual3D.Content> </ModelVisual3D> </Viewport3D> </Grid> </Window>

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• Game engine like Unity 3D that allow me to use .NET code

  - by Pking

  I've been looking at Unity 3D for developing a 3D PC game and I really like the scene editor and how it simplifies the process of constructing 3D scenes, managing assets, animations, transitions etc. However, I don't want to restrict myself to using the Unity 3D scripts for handling every bit of game logic in the game. E.g. If I want to construct a RPG dialogue system I don't want to do it with unity 3d scripts - I'd like to use C#/.net. Also, I might want to use e.g. windows azure and sql azure as backend, and use 3rd party .net libraries such as reactive-extensions etc. Is there a .net engine out there that helps me with asset loading, animations, physics, transitions, etc. with a scene editor, but allow me to plug it into a visual studio .net project? Thanks

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• How can I keep straight alpha during rendering particles?

  - by April

  Rencently,I was trying to save textures of 3D particles so that I can reuse the in 2D rendering.Now I had some problem with alpha channel.Some artist told me I that my textures should have unpremultiplied alpha channel.When I try to get the rgb value back,I got strange result.Some area went lighter and even totally white.I mainly focus on additive and blend mode,that is: ADDITIVE: srcAlpha VS 1 BLEND: srcAlpha VS 1-srcAlpha I tried a technique called premultiplied alpha.This technique just got you the right rgb value,its all you need on screen.As for alpha value,it worked well with BLEND mode,but not ADDITIVE mode.As you can see in parameters,BLEND mode always controlled its value within 1.While ADDITIVE mode cannot guarantee. I want proper alpha,but it just got too big or too small consider to rgb.Now what can I do?Any help will be great thankful. PS:If you don't understand what I am trying to do,there is a commercial software called "Particle Illusion".You can create various particles and then save the scene to texture,where you can choose to remove background of particles. Now,I changed the title.For some software like maya or AE,what I want is called [straight alpha].

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• What Shading/Rendering techniques are being used in this image?

  - by Rhakiras

  My previous question wasn't clear enough. From a rendering point of view what kind of techniques are used in this image as I would like to apply a similar style (I'm using OpenGL if that matters): http://alexcpeterson.com/ My specific questions are: How is that sun glare made? How does the planet look "cartoon" like? How does the space around the planet look warped/misted? How does the water look that good? I'm a beginner so any information/keywords on each question would be helpful so I can go off and learn more. Thanks

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• Projecting a 3D point to 2D screen coordinate OpenTK

  - by sinsro

  Using Monotouch and OpenTK I am trying to get the screen coordinate of one 3D point. I have my world view projection matrix set up, and OpenGL makes sense of it and projects my 3D model perfectly, but how to use the same matrix to project just one point from 2D to 3D? I thought I could simply use: Vector3.Transform(ref input3Dpos, ref matWorldViewProjection, out projected2Dpos); Then have the projected screen coordinate in projected2DPos. But the resulting Vector4 does not seem to represent the proper projected screen coordinate. And I do not know how to calculate it from there on.

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• Subdividing 3D mesh into arbitrarily sized pieces

  - by Groky

  I have a mesh defined by 4 points in 3D space. I need an algorithm which will subdivide that mesh into subdivisions of an arbitrary horizontal and vertical size. If the subdivision size isn't an exact divisor of the mesh size, the edge pieces will be smaller. All of the subdivision algorithms I've found only subdivide meshes into exact powers of 2. Does anyone know of one that can do what I want? Failing that, my thoughts about a possible implementation is to rotate the mesh so that it is flat on the Z axis, subdivide in 2D and then translate back into 3D. That's because my mind finds 3D hard ;) Any better suggestions? Using C# if that makes any difference.

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