You can rent a studio with all that technology inside. I remember to got a leaflet with info about such an offer one year back. With 2000$ you are not that far away I guess.

A couple of web cameras, a box of ping-pong balls, some glue and a monkey would also do the trick.

Write a bit of code to convert the balls to 3d points, then you get the monkey to go through every frame connecting the points up to form bone data.


Alternatively you could hire time at one of the studios mentioned above. Also for many common motions, some places sell ready made and properly cleaned mocap data on CD so you can do the same for even less.

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Simon O''''Connor
Creative Asylum Ltd
www.creative-asylum.com

quote: Original post by SD2
Interesting. This type of thing really works? Is it really possible to get proper motion capture results like this? The ping pong ball idea seems to be the exact same thing as the 150 000 dollar optical motion capture they use (the same in theory). Would one actually be able to do these things and get proper results?

Same basic idea. The clever thing that the $150,000 system companies have done is to commercialize the process. They developed software to automate (or help) postprocess the raw data, including just visualizing the data as it comes in. They manufactured, or bought, scaffolding to hold the cameras in place so they don''t shake, designed/manufactured or bought high speed data collector devices (aka data acquisition systems), worked deals with camera, light, and ball manufacturers, etc., to bring the rest of the pieces together. They put the package together, do training, do hardware setup, support, etc. Some systems may use 20 or so high-res video cameras (for large rooms, tracking many pointers on multiple characters). If they use 20 miniDV cameras, you''re talking $20,000 for single-CCD cameras alone. They may use 3-CCD cameras (which produce higher-quality images), which would at least double that cost just for the cameras.

The better optical systems do not use ping pong balls. They use smaller balls that appear to have an anisotropic surface. They are "retro-reflective" markers, and they might be easier to identify from a video stream using DSP hardware/software for these commercial, automated systems.

I would guess that the do-it-yourself approach would work, but perhaps not quite as well and certainly not as fast as the commercial system (given that you would probably either write your own software or hire a monkey to postprocess the data). You''d probably need to expect lower-resolution data, with more noise and "bad" data samples.

Anyway, I only meant to describe the value added by commercial systems, not discourage you, . It would be very cool to see you succeed in implementing some level of el-cheapo, home-grown motion capture system. Good luck!


Graham Rhodes
Senior Scientist
Applied Research Associates, Inc.

Another approach you can also do is to make a deal with a company that is having the necessary equipment in your area. If you feel that your game is really gonna be good and that you really want to use MoCap, then you can always try to make a on royalties deal (It works but you have to carefully plan that deal, I did that so I know what Im talkin about).

Its like the company sort of rent you the equipment then you pay them once the game is out or as a co-production project. Note that for co-produced game you have to be ready to give a % of the intellectual property to the company and your game is better be good.

Anyway, I doubt this could help much but that was only my 2 cents here about another possibility of what you can do without too much money.



What is a better quote than this : "blank".

It would seem your best bet would be to purchase ready-made mocap data from some place like Motek or Turbo Squid.

I work for a company that makes software for motion-capture and 3D animation, and it''s not as simple as it seems. One of your biggest problems with getting data out of such an ersatz system will be that the data will not be clean. It''s very sensitive to things like vibration, etc.

If you can''t find pre-canned mocap data, booking some time at a studio is another option, as others have pointed out. If you plan to do this, make sure you organize your shoot very well before hand. If I''m not mistaken, there is a very good article on Gamasutra that outlines how to do this so that you maximize your time there. Renting a studio with a good Vicon camera system and some decent technicians can become very costly.

R.