POV-Ray : Newsgroups : povray.unofficial.patches : uv_mapping + image_map for bicubic_patch type 2 Server Time
2 Sep 2024 02:15:23 EDT (-0400)
  uv_mapping + image_map for bicubic_patch type 2 (Message 1 to 3 of 3)  
From: Libellule
Subject: uv_mapping + image_map for bicubic_patch type 2
Date: 15 Aug 2000 17:09:43
Message: <3999B1D2.3A059240@insectes.net>
I am recently playing around with bicubic patches. I found that they
consumed much memory in official POV 3.1g, so I looked in the docs for
MegaPOV 0.5, and tadaaaa there is an improved bicubic_patch. What used
to take tens of MB of memory now took a few hundred k. Then I wanted to
try uv_mapping with an image_map. I can get the uv_mapping to work for
type 1 (ie the original kind), but for type 2 the patch is the same
colour, which looks like the colour of one of the corner points of the
image_map. The docs mention uv_vectors <start>, <end>, which I tried,
but no matter where I put that statement, it would never get past the
parsing. I will post an image to the images group showing two patches
(they are flat for clarity), the lower left is type 2 accuracy 0.001,
the upper right is type 1 flatness 0.001 u_steps 4 v_steps 4


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From: Mike
Subject: Re: uv_mapping + image_map for bicubic_patch type 2
Date: 15 Aug 2000 23:27:14
Message: <399A0A0F.8E0C5F2D@aol.com>
UV mapping doesn't work with type 2 patches - yet.  I fixed this and
sent the code changes to Nathan, so it should wind up in a future
version of MegaPOV.

-Mike


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From: Libellule
Subject: Re: uv_mapping + image_map for bicubic_patch type 2
Date: 16 Aug 2000 00:05:04
Message: <399A132C.252E8F01@insectes.net>
> so it should wind up in a future version of MegaPOV.

So all I have to do now is bug Nathan to release a new version <g>

and now ve vait


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