3d

OpenGL GL_SELECT or manual collision detection?

Greetings all, As seen in the image I draw set of contours (polygons) as GL_LINE_STRIP. Now I want to select curve(polygon) under the mouse to delete,move..etc in 3D . I am wondering which method to use: 1.use OpenGL picking and selection. ( glRenderMode(GL_SELECT) ) 2.use manual collision detection , by using a pick-ray and che...

Comparison of Flash 3D Engines

Hi, I am currently digging into the whole Flash 3D stuff and I am quite unsure which engine I should use. I really prefer haXe for development but ActionScript 3 is also fine. Therefore I would like to ask you about experiences you have made! If you answer this question please consider the following points: Easy to use? Easy to learn...

Manage falling using rays in Irrlicht

In my game i'm currently working on, i only need very basic physics, so i don't want Newton, ODE, Bullet or similar. I basically only want to fall as long as no node (all equally sized blocks) is beneath me. I tried to send a ray from the camera and 100.0 units downwards. But it gives false positives. selectedNode = NULL; //Falling...

reverse engineering a camera

If I have a list of 3D points and their 2D projection on screen, is there a way to compute the camera that performed the projection? I am using the WPF perspective camera. ...

Silverlight (4?) How to implement a 3d sitemap control?

I would like to alter the following control (link) to represent the nodes in a 3D space. Are there any libraries which would enable such an alteration or are there any other controls available which do basically that? ...

Trying to create spinning propeller. Keeps spinning around origin, not itself.

Hi. I'm trying to create a spinning airplane propeller in Java 3D. At the moment, it is rotating around the origin. However, I need it to rotate around itself. I haven't done much 3D graphics in Java, so I'm pretty much stumped. TransformGroup rotateTheBlades = new TransformGroup(); rotateTheBlades.setCapability(TransformGroup.ALLOW_TRA...

Calculating angular rate.

Hi, I'm simulating a physical object, using a mass spring system. By means of deltas and cross products, I can easily calulate the up, forward and side vectors. I want to calculate what the angular rate (how fast it's spinning), for the object space X, Y and Z axis. Calculating the world space angle first won't help, since I need the a...

How to create platform independent 3D video on 3D TV via HDMI 1.4?

I am writing a real-time, interactive 3D visualization program and at each point in the program, I can compute 2 images (bitmaps) that are meant to look 3D together by means of stereoscopy. How do I get my program to display the image pairs such that they look 3D on a 3D TV? Is there a platform independent way of accomplishing it? (...

Matplotlib 2d polygone in 3d axes

Hi everybody, I'm using matplotlib to plot some data as 2d curves in a 3d axes. I use the ax=axes3d.Axes3D() to define my axes and ax.plot(x,y, zs='z') to plot my 2d curves in the 3d space. Now I want to add something that looks like what is on this page http://matplotlib.sourceforge.net/examples/mplot3d/polys3d_demo.html, but I want t...

How to Create 3D AVI video by using Left and Right uncompressed AVIs

Hello all, i need to create an AVI file for 3D. That is i have two (Left & Right) uncompressed avi videos. Now I want to create a single 3D avi by using these two avi's. I am using VC++ 8.0 for development. Can you please give some ideas how to create a 3D video. Can any one lists libraries if any 3rd party libraries exists. Thanks in...

iPhone OpenGL: Moving around a 3D enviroment

Hello all, this is probably a long shot I am looking for an example / tutorial of how to render a floor (or room) and move around it. There seems to be the perfect example here: http://www.cocoachina.com/wiki/index.php?title=OpenGL_ES_13_-_Moving_in_3D However the download (which is required) is missing. Does anyone have any code sam...