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povray nous apporta ses lumieres en ce 2005-04-30 15:33:
> Alain <ele### [at] netscape net> wrote:
>
>>povray nous apporta ses lumieres en ce 2005-04-30 10:56:
>>
>>>Is there an easy way to texture a large (4 million+ triangle) mesh2 object
>>>from an image file? I'm trying to do some hi-res mars renders from
>>>elevation data. I can build the model, but I haven't thought of an easy to
>>>to get the right colors onto it. I have a .png mars texture, but it
>>>doesn't want to play nice with the mesh2. If someone could point me to an
>>>example it would be much apreciated.
>>>
>>>
>>
>>As your mesh2 is realy only a hight field, and your image probably a top-down view
of the same area.
>>Can you simply the image_map as on a plane? Rotate your mesh to match the plane of
the image_map,
>>translate the image so that both origins match.
>>
>>Alain
>
>
I tough that it was only a section that could be assimilated to a bumpy plane. My bad
assumption.
> actually, it's not a height field, it a mesh2 that is created using data for
> the whole planet, it's basically a bumpy sphere... but I think I've thought
> of a way to texture it... It's not gonna be nice, but it'll work.
>
>
OK! Then use a warp{... spherical } to map your image onto the spherical mesh. You can
adjust the
positioning using rotation. Read the documentation section: 3.5.12.6.5 Mapping using
warps
Alain
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