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Index › Suggestions & Bugs › Software Bugs › P3D texture warp
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P3D texture warp (Read 1381 times)
JohnG
P3D texture warp
May 4th, 2005, 11:15pm  
P3D mode appears to bdaly apply textures to objects, in terms of perspective warping, to show what I mean:

OPENGL:
...

P3D: (different scene, it's auto generated so can't give exact version)
...

What it looks like is happening, is the long side of the triangle poly, is being used to calculate how the texture ends up translated into screen space, and it ends up assuming that the texture is recangular in screen space and just skewed e.g.:
...
With large perspective size changes, like in the above images, this becomes incredibly visible unfortunately.

OPENGL mode seems to handle it correctly, but unfortunately, this stops a sketch being able to be published :/
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fry
Re: P3D texture warp
Reply #1 - May 5th, 2005, 4:03pm  
yeah, it's a known problem P3D.. it goes for speed over accuracy sometimes. in the future we'd like to at least provide an accurate "mode" as an option.
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fry
Re: P3D texture warp
Reply #2 - Jul 28th, 2005, 5:18am  
now filed in the bugs db:
http://dev.processing.org/bugs/show_bug.cgi?id=103
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