hi is there any way of fixing the distorion i get when i project gem visuals in curved or irregular surfaces? is there any trick?
thanks
pun
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If you have accurately measured the distortion you can correct it by rendering the entire scene offscreen then mapping it onto corrected geometry. You could also do it by sight with less exact results.
I have seen this done perfectly once for a hemispherical projection system designed for DoD weapons simulations. The guys who made the system are/were some of the top optics engineers in the world, so they made it look easy.
On 5/16/07, punchik punchik punchikk@yahoo.com wrote:
hi is there any way of fixing the distorion i get when i project gem visuals in curved or irregular surfaces? is there any trick?
thanks
pun
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maybe there is a possibility to use shaders to combine the images with something like a bumpmap. some game engines like quake3 use similar techniques (it has to do with normals). but I have absolutely no idea how that is done. marius.
chris clepper wrote:
If you have accurately measured the distortion you can correct it by rendering the entire scene offscreen then mapping it onto corrected geometry. You could also do it by sight with less exact results.
I have seen this done perfectly once for a hemispherical projection system designed for DoD weapons simulations. The guys who made the system are/were some of the top optics engineers in the world, so they made it look easy.
On 5/16/07, *punchik punchik* <punchikk@yahoo.com mailto:punchikk@yahoo.com> wrote:
hi is there any way of fixing the distorion i get when i project gem visuals in curved or irregular surfaces? is there any trick? thanks pun ____________________________________________________________________________________Be a better Heartthrob. Get better relationship answers from someone who knows. Yahoo! Answers - Check it out. http://answers.yahoo.com/dir/?link=list&sid=396545433 <http://answers.yahoo.com/dir/?link=list&sid=396545433> _______________________________________________ PD-list@iem.at <mailto:PD-list@iem.at> mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
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check out lighttwist of jean-philippe tardif université de montréal it does the calibration automatically, you just need a high-res frame- grabber.
http://tot.sat.qc.ca/logiciels_lighttwist.html
max
Am 17.05.2007 um 05:31 schrieb chris clepper:
If you have accurately measured the distortion you can correct it
by rendering the entire scene offscreen then mapping it onto
corrected geometry. You could also do it by sight with less exact
results.I have seen this done perfectly once for a hemispherical projection
system designed for DoD weapons simulations. The guys who made the
system are/were some of the top optics engineers in the world, so
they made it look easy.On 5/16/07, punchik punchik punchikk@yahoo.com wrote: hi is there
any way of fixing the distorion i get when i project gem visuals in curved or irregular surfaces? is there any trick?thanks
pun
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We used one approach for SPIN:
where we did "render to texture" of the image we wanted to be seen, then placed this texture on a model of the screen and "filmed" it from a camera placed where the projector was.
in 2000, when we did this, it was only possible to do this sort of
thing on consumer grade PCs using DirectX, so we had to go down that
path.
I think this is now doable in general OpenGL stuff, but no idea how.
The latest version of software for SPIN was made in VVVV, so it
would be probably relatively easy to modify their code for some
other surface.
I make it sound a bit trivial, but it isn't quite. But it is also a lot easier than it was originally for us.
Tim
On 17/05/2007, at 4:52 AM, punchik punchik wrote:
hi is there any way of fixing the distorion i get when i project gem visuals in curved or irregular surfaces? is there any trick?
thanks
pun
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Tim Boykett