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HTC Vive projection mapping with Camschnappr

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HTC Vive projection mapping with Camschnappr

Postby kweiming » Tue Aug 29, 2017 2:31 pm

Hello,
I'm new in TouchDesigner. I'm now testing dynamic projection mapping using Camschnappr with vive controller. Now I've attach object to the vive controller, but after I aligned 6 points in the view port, the projection just not match with the position of object. The camera seemed not calibrated. Could anyone tell me how let the camera calibrated? Thank you :D
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Re: HTC Vive projection mapping with Camschnappr

Postby snaut » Wed Aug 30, 2017 12:12 am

Hi,

have you tried calibrating to the object itself first?
Are you in TouchDesigner 099 or 088?

Cheers
Markus
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Re: HTC Vive projection mapping with Camschnappr

Postby kweiming » Wed Aug 30, 2017 5:22 am

Hi,
I use TouchDesigner 088, I've tried that before, and it worked!
I followed the instruction made by you from here: http://www.derivative.ca/Forum/viewtopi ... =22&t=4225
Thanks...
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Re: HTC Vive projection mapping with Camschnappr

Postby snaut » Thu Aug 31, 2017 6:47 pm

Hi,

So after calibrating the projector, you would have to place the controller on your object and save the position the Openvr CHOP returns (using a Hold CHOP for example). Now calculate the difference between the saved values and the new controller position and use these values to transform the object. I have never tried this but imagine it working this way.

Attached a simple breakdown of it.

Cheers
Markus
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Re: HTC Vive projection mapping with Camschnappr

Postby mraeclo » Thu Sep 14, 2017 12:57 am

Hey, how is it going?

I`m just curious about how exactly can I track a controller position using td. If I only have a controller and two base stations would that be possible? How would the computer receive data from the controller? Do I need the htc linkbox?
Sorry if the questions are too noob but I`m trying to find information about this and I just couldn`t. I want to buy whats necessary to track the controller and it would be a lot cheaper if I don`n need the actual vive glasses. I never got my hands on one so I`m not sure about how the connection with the computer works.

thanks in advance!
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