PDA

View Full Version : LW for Forensic Animations



WilliamVaughan
10-22-2003, 08:44 AM
I've been hearing alot about LW being used for Forensic work....I was curious if anyone hear has done any work like this with LW?

robewil
10-22-2003, 08:49 AM
I've been doing that type of work in Los Angeles for the past 8 years.

WilliamVaughan
10-22-2003, 08:52 AM
can u share any examples?

robewil
10-22-2003, 09:24 AM
Here are some samples from a case involving mudslides in Malibu.
http://www.legal-lgt.com/new/forensic/cylend.jpg
http://www.legal-lgt.com/new/forensic/fly1beg.jpg
http://www.legal-lgt.com/new/forensic/mudend.jpg

robewil
10-22-2003, 09:26 AM
And some personal injury stuff.
http://www.legal-lgt.com/new/forensic/AccidentEnd.jpg
http://www.legal-lgt.com/new/forensic/CU0117.jpg
http://www.legal-lgt.com/new/forensic/Dive146.jpg

robewil
10-22-2003, 09:27 AM
From a patent infringement case. This is a bag sealing machine.
http://www.legal-lgt.com/new/forensic/Ishida.jpg

anieves
10-22-2003, 02:26 PM
I don't think I can post any samples due to product development issues but I do that kind of work;)

omeone
10-22-2003, 04:34 PM
Forensics as in crime scene simulations?

MiniFireDragon
10-23-2003, 07:17 AM
I have been using animtation in Forensics for the past 6 years (since i have been employeed at where I work currently).

I have only had Lightwave for about 3 years and created a few works in it.

Such as:

Tractor Trailer crossing medial barrier into oncoming traffic - Still active, no demo

Tractor Trailer crushing car into medial barrier - Case Closed, Demo Availible - Won

Worker falling off overpass under construction - Case Over, Demo partially finished - Think case won, I was told to stop working, trying to finish for demo

Vehicle pull away from Diesel Fuel Station, knocking someone into pumps - Case closed - Won

Process Plant - How a process plant works - No Demo, advertisement for company.

Some of the vehicle accidents I do involve using information from a program like McHenry Software.

www.mchenrysoftware.com

If u want to see this stuff, I have no stills, but most are compressed into MPeg format.


Ernest

www.govatosconsulting.com

MiniFireDragon
10-23-2003, 07:37 AM
If u want to see stuff I did pre Lightwave goto:

http://www.govatosconsulting.com

and click on Animations and Imaging on the left.

The only problem I have using Lightwave for forensic animation is the construction of the scene. It basically requires me to build the entire scene in one lwo file and it take me a good chunk of time. I deal with total station data, which is sometime up to 1000 points. It's not the easiest thing to plot those points in Lightwave, so I use AutoCAD. But when u bring in the DXF files, u don't get solid objects, u get lines. And the evidence points I use I must make circles because Lightwave doesn't generate points that exist in DXF files, which can be a pain in the beep.

The reason I need to make everything in one LWO is if I build my scene in pieces, and bring them into Lightwave, puts every object to 0,0,0!!! And alot of my objects need to be precisely placed, and since Lightwave won't bring in points with the DXF files, it forces the whole one LWO file.

The vehicles can be drawn seperate since the ACAD and Lightwave Cordinate system fits with eachother, and on import I cna place the Center of Gravity of each vehicle where need be.

robewil
10-23-2003, 09:52 AM
Originally posted by omeone
Forensics as in crime scene simulations?
Actually, it's much more than that. In fact, it is very rare when animation is used in a criminal case since it is not direct evidence. Almost all the work I do involves corporate or civil lawsuits. The biggest reason is that millions of dollars are involved in these suits so a few thousand spent on animation is not that big a deal. Criminal cases usually don't involve large sums of money.

Often, the animation is used to educate the jury. The mudslide animation work I did years ago (see pictures above) were primarily used to show the conditions that led to the mudslide and destruction of property. The full animation showed aerial views that revealed how a large canyon funnelled to a small outlet at the bottom. The animation shows how there was a large brush fire prior to a very wet winter. So the animation didn't "prove" anything. It was used to educate the jury about what conditions can lead to a mudslide.

omeone
10-23-2003, 01:37 PM
Ah, understood... interesting branch for 3D work alright. Thanks robewil.

Oh and just as an aside - I'm rendering a scene at the moment that is supposed to represent a bus driver's perspective as he turns around a particularily blind city corner into oncoming traffic, basically to highlight potential problems (for my traffic planning dept).
I was wondering if any of you forensic guys could suggest a good camera setup for representing first person human perpective?

robewil
10-23-2003, 01:44 PM
Human eye perception can be tricky. Use a wide zoom (2.0 is usually around what I use). Render in a wide screen format (720 X 405 for video) and use some depth of field. Keep in mind a human's field of vision is actually wider than that.

Honestly though, show some test renders to your client because, in my experience, they often change their mind about the whole human perception thing. I often end up going back to a conventional 4:3 no depth of field look.

hunter
10-23-2003, 04:47 PM
I've been doing it for about 3 years now. One case showed the expert how wrong he was. In order for the accident to have occured the way he said, the pedestrian had to have been walking at 23 mph. :) I'll see if this zip uploads with examples.
One is bullet trajectories that put the bad guy away. Two are accident recontructions. I offered more photo real ones to the Lawyers but they were worried about it getting thrown out if it looked too real. Hmmm?
Edit:
Appearantly the zip is too big.

hunter
10-23-2003, 04:51 PM
trying again
Edit
It's only 2 MB. What gives?

omeone
10-24-2003, 01:51 AM
Originally posted by robewil
Human eye perception can be tricky. Use a wide zoom (2.0 is usually around what I use). Render in a wide screen format (720 X 405 for video) and use some depth of field. Keep in mind a human's field of vision is actually wider than that.

Honestly though, show some test renders to your client because, in my experience, they often change their mind about the whole human perception thing. I often end up going back to a conventional 4:3 no depth of field look.

yeah, Ive been using 16:9 @ 2.8 zoom, but I knew it was a big compromise on what it should be, havn't bithered with DOF though, cos the viewers will be examining every perpheral detail

as you said it's a nice wide FOV and the clients are quite happy with it, so that's what counts sometimes

cheers

robewil
10-24-2003, 10:17 AM
The main issue is that human vision is curved. It's impossible to translate that properly onto a flat screen. Maybe someone will invent a "Cinerama" monitor someday.

3Dswade
01-21-2009, 10:23 AM
Well guys been a member for years, always used the discussion forum as a help tool. But now I am need of your help. I have been a commercial animator since 1990 yes I'm that old! Since 97 I've been building accident recreations. Anyway I see someone brought up total Station. Our State just started using total station What is the best procedure for getting Total Station Forensic files into Lightwave. I know they have mapping and animation software for TS, But it looks like dog squeeez. No shadow mapping or reflections. The stuff looks like a six grader animated it. Any help wuold be appreciated!!!!

akademus
01-21-2009, 10:59 AM
Not exactly forensic but ABP (http://www.medical-animations.com) in Sydney does heaps of medical and "inside body" shots. All LW made with some XSI bits.

MiniFireDragon
01-21-2009, 03:27 PM
The Total station data is out put in an ascii readable format. So much to the point you can hand enter the data into autocad or lightwave. Then there is software from Eaglepoint (inexpensive) and Cadzone: http://www.cadzone.com/default.htm. Which in there software turns the co ordinate data into points.

I prefer eaglepoints software as it has much much better software for building the surfaces needed.