Anatomical Travelogue Research » Uncategorized

Generic Shader addin: Lit Sphere

Chad — Fri, 23 Jul 2010 22:58:59 +0000

Here’s a first attempt at delivering an extra shader to the Generic Shader. In this case it is a “lit sphere” shader. ZBrush users should be familiar with the idea, a simple shaded sphere image is used to describe non-local shading over all the surfaces visible to the eye.

In order to add this shader, you just need to copy this shader into the ATGenericShader_f.cg file:

if (intShaderNumber==20) //Lit Sphere. Based on a 2D lookup texture.
{
float3 origTexCoord = f.TexCoord0;
float2 mapping = materialA.Shade(f).rg; // sampling from rg to go along with typical normal rendering. Could be trivially extended to rgb for a 3D lookup.
f.TexCoord0.x = mapping.r;
f.TexCoord0.y = mapping.g;
float4 ret = materialB.Shade(f);
f.TexCoord0 = origTexCoord;
return ret;
}

Then just restart Fusion. Here I’ve set the shader to slot 20, but you can change that to any number you want. To see the example comp you’ll just have to edit the Shader number slider in the comp. Just to play it really safe, I’ve also copied the shader string into the comments of the GenericShader tool. Neat.

Download Lit Sphere Generic Shader example comp A01

Blogging SIGGRAPH 2010

Chad — Wed, 21 Jul 2010 18:10:34 +0000

Ben an I are heading out to SIGGRAPH later this week. I’m planning on blogging during the day this year instead of doing a nightly debrief. To add to the challenge, I’ll be doing it all from my Nexus One. This post was done on the phone, so it seems plausible. In fact, I may not pack my laptop at all, leaving more room for books in my luggage.

Drop us a line if you’d like to meet up, or if you want to suggest something not to be missed.

Or just keep an eye out for us. I’ll be the guy in the SIGGRAPH t-shirt with no laptop.

Help Wanted

Chad — Thu, 15 Jul 2010 13:43:01 +0000

We’re hiring!

We’ve replaced the menu link for Visualization Services with We're Hiring because, well, we’re pretty solidly booked. Maybe you could help with that?

We’re looking to immediately hire both permanent and contract developers to help us make everything from offline medical image processing and rendering tools to realtime interactive and simulation applications. We can’t go into all the details here, but if you would like to find out more, drop us a line.

Worldspace position sampling

Chad — Mon, 22 Mar 2010 17:17:19 +0000

Here’s one of those posts were we do something clever with only the built in tools in Fusion. This time it’s getting the worldspace position of any node (or offset point from a node) despite downstream transformations. Why do I need to make a special setup for this? Oddly, Fusion doesn’t provide an easy means to convert between local and world coordinates, and someone asked for a way to do this on the Fusion-L listserv.

(Particle Emitter “attached” to a Sphere)

The biggest problem in Fusion is how it handles modifiers. In the case of the modifiers for UI exposed parameters like points, or floats, or strings, you get a way to add modifiers, but not a really clean way of managing them. But for 3D parameters, you get no modifiers at all, only an abstraction to float parameters, so a transform matrix is only available to the user as a list of floats for the PRS and pivot. Sure, you can make your own “controller” with the 3D SDK, but a 3D tool that might affect a 3Sh won’t affect a pEm.

Download Worldspace position in F6 with no fancy math (or SDK) A02

Updates from SIGGraph III

Chad — Fri, 07 Aug 2009 23:31:47 +0000

The end is near...

I’m on my way home now. Ben and I got to see a lot of really nice presentations, and we had some good discussions with researchers and suppliers.

Texmoca

Texmoca is a very unique demonstration of natural occurrences of Voroni type packing. Small heating elements burn oil which spreads out, cools, and falls in beautiful convection currents. Best coffee table of the show, but the heat it gives off makes it bad for drinks, good for fondue.

Ground Substance, from LabStudio

The Generative Fabrication exhibit was really nice. Particularly the contributions by LabStudio.

Here in New Orleans

Chad — Mon, 03 Aug 2009 05:45:58 +0000

Ben and I are here in New Orleans. Estimates are that there are 16998 other attendees.

A SIGGraph Sousaphone

We’ll be showing off some of our plugins at the Eyeon booth on Wednesday, and we’ll be attending some panels, courses, and papers that really look exciting. We’ll post some general observations of SIGGraph as well.

First thing I’ll mention, Autodesk has a rather modest booth made of cardboard and zip ties. Really.

Fusion plugin wizard for Visual Studio 2003

Matt — Thu, 23 Jul 2009 15:36:18 +0000

We recently had a request for our Fusion plugin wizard for VS 2003, so here is a download link. Enjoy!

Download Fusion plugin wizard for VS 2003

Bad X-Ray Sighting

Ben — Tue, 24 Feb 2009 21:41:55 +0000

This might be a rare acceptable usage of the bad x-ray look. Along with the font, the music, and even the host (sorry, Mr. Hess) and presentation format, the x-ray skull and brain graphic make The Knowledge Chamber look like a cheesy show from the early nineties. But it’s not pretending to be an x-ray. It is, however, a testament to how visualization techniques are often associated with an era. Some of these are fads, and some are artifacts of the limitations of the technology at the time. One hopes that when the limitations are lifted, the use of these visuals are deliberate design decisions.

Also, Congrats to Johnny Lee on your new position at MSR.

Ben Lipman

Technorati Tags: x-ray,commentary