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Index › Programming Questions & Help › Syntax Questions › Vision angle and "Head Up Display"
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Vision angle and "Head Up Display" (Read 449 times)
olivier
Vision angle and "Head Up Display"
Jun 18th, 2007, 9:00pm  
Hi,
I wonder what is the vision angle used in Processing ?
Maybe my question is not relevant, but here is the context:
I have a horizontal plane (x and y axis) at elevation 0 (z=0) of, let's say 200x200 pixels. I would like to see it from a higher position (e.g. z=50). The center of the view is at x=50 y=50 z=0.
At what distance I have to put my eye to see all the plane in a 100x100 window ??

A related question: I would like to make a "Head Up Display" system such that the indicator will be always at the same place and same distance from the eye, whatever its moves. I will update it depending on the camera position and orientation. But how to compute the distance from the eye for a button to be in the upper right corner ?

Regards
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V
Re: Vision angle and "Head Up Display"
Reply #1 - Jun 19th, 2007, 6:35pm  
check out perspective() function from processing..

you should check orthogonal projection..

ortho()

http://processing.org/learning/examples/ortho.html

create your "viewport" and render whatever you need in the hud it will always stay in front of the camera
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Victor Martins | www.pixelnerve.com/v
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