Re: [JAVA3D] Code for computing intersection of 2 shape3ds

2004-09-20 Thread Alessandro Borges
Take a look at Danilo work about boolean operations:   http://www.geocities.com/danbalby/ Alessandro   Omolola Ijeoma Ogunyemi <[EMAIL PROTECTED]> wrote: Does anyone have this? Thanks!Omolola===To unsubscribe, send email to [EM

Re: [JAVA3D] Large Textures

2004-09-20 Thread Mike Pilone
Hello, The most common way to solve this is to break the shape into a collection of smaller textures, usually using a quadtree or similar data structure. Then do LOD swapping of the textures as the camera moves. This will allow you to have many smaller textures, but still have the detail when need

Re: [JAVA3D] Large Textures

2004-09-20 Thread Alessandro Borges
Hi, Check Java3D's PackageInfo and QueryProperties demos. There are two properties - textureWidthMax and  textureHeightMax, wich can help you. Resize down your texture if  it is  too big for your video card. Low memory vcards works better with  small textures, as 256x256.   Alesssandro   "M. Halpi

Re: [JAVA3D] Code for computing intersection of 2 shape3ds

2004-09-20 Thread Omolola Ijeoma Ogunyemi
Thanks! Omolola On Sep 20, 2004, at 8:07 AM, Alessandro Borges wrote: Take a look at Danilo work about boolean operations:   http://www.geocities.com/danbalby/ Alessandro   Omolola Ijeoma Ogunyemi <[EMAIL PROTECTED]> wrote: Does anyone have this? Thanks! Omolola

Re: [JAVA3D] Optimising Java3D in an IRIX CAVE

2004-09-20 Thread GOBE HOBONA
Hello all, We have just set up SGI's Java3D ver 1.3 in a three-screen CAVE running on an IRIX platform and are experiencing what might be some optimisatiion issues. We have a program that runs almost five times faster on a Windows PC with a 64MB graphics card than it does on our IRIX machine which

[JAVA3D] Lights and bounds?

2004-09-20 Thread Rick Brownrigg
I've got a scene consisting of long, narrow quads, and I'd like to selectively illuminate only portions of those quads. I set up some light sources with the desired bounding boxes, but what I'm seeing is that if the bounding box intersects *any* part of the quad, the entire quad is subject to illu

Re: [JAVA3D] Lights and bounds?

2004-09-20 Thread Gilson Laurent
Hello On Monday 20 September 2004 20:02, you wrote: > I set up some > light sources with the desired bounding boxes, but what I'm seeing is > that if the bounding box intersects *any* part of the quad, the entire > quad is subject to illumination from the light, including those portions > well out

[JAVA3D] Java 3D FAQ Weekly Posting (20 Sep 2004)

2004-09-20 Thread The Java 3D FAQ
The Java 3D Frequently Asked Questions list for Monday September 20 2004 This is a posting of topics covered in the Java 3D FAQ. The answers to these questions are kept at: http://www.j3d.org/faq Please consult this list and the web site before asking questions on the mailing list. If

[JAVA3D] How to get normals of a shape3d

2004-09-20 Thread Ricardo Chaves
Hi, Recently, I've been working on a FPS(First-Person Shooter) game using Java3D. I implemented the collision detection using a pickray pointing to the front of the avatar. But I've been had troubles about calculating the collision's response. How can I get the surface normal vector of a shape3d

Re: [JAVA3D] Optimising Java3D in an IRIX CAVE

2004-09-20 Thread Mark Hood
> We have just set up SGI's Java3D ver 1.3 in a three-screen CAVE running on > an IRIX platform and are experiencing what might be some optimisatiion > issues. We have a program that runs almost five times faster on a Windows PC > with a 64MB graphics card than it does on our IRIX machine which has

[JAVA3D] parsing 3d segmented data and visualizing it

2004-09-20 Thread Vidya Raghavan
Hi, I am new to Java 3d and need some help with the following: 1) Basically I have a set of text files with integers in eahc file. Each integer correspinds to a segmented region to which a pixel belongs to. For example, if a txt file contains 1 2 2 3, then it represents 4 pixels where the pixels be