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On 8/16/2017 2:44 AM, Sven Littkowski wrote:
> On 15.08.2017 03:34, clipka wrote:
>> The mesh files provided by NASA are certainly just the surface, and
>> since it's not the entire planet but just a tile (or so I guess),
>> turning it into a solid 3D volume isn't trivial. You'll need to proceed
>> as follows:
>>
>> (1) Generate the mesh INC file.
>>
>> At this point, all you have is a mesh patch object, i.e. a genuinely
>> non-solid sheet.
>>
>> (2) To the mesh, add an `inside_vector` specifying whatever direction is
>> supposed to be "up" with respect to the tile.
>>
>> At this point, you have a chimera between a solid and a patch: It now
>> has a well-defined inside (namely every point that is "below" the tile,
>> i.e. the tile extruded "downwards" toward infinity). The surface
>> definition is still patchy though (pun intended), so right now you won't
>> see any effect, because POV-Ray can only render surfaces, not volumes.
>>
>> Note however that this chimera is already good enough to start "digging"
>> using CSG.
>>
>> (3) Intersect the mesh with another object, e.g. a box, defining the
>> dimensions of the "massive block" you want.
>>
>> Make sure that for any point on the box that is supposed to be "below"
>> the landscape, if you trace a line in the direction given by the
>> `inside_vector`, it should properly intersect the mesh (note that
>> grazing it might not be enough).
>>
>> This step will add surfaces to the "sides" and the "bottom" of your
>> block of landscape, so that they can be seen as well. If that's not a
>> thing you need, this third step is entirely optional.
>
> Thanks.
>
> When talking about that "inside_Vector", I refer to Clipka's information
> he gave me, when I mentioned that I wanted to have solid shapes (and not
> hollow meshes) for POV-Ray.
>
> My understanding of Clipka's information was, that I should open the STL
> meshes in Blender and that I would find there an option to add that
> mysterious "inside_vector".
>
> When you all read Clipka's instructions, what is your understanding? I
> still want to assume his information is correct.
>
How I read the instructions you posted above is:
Open the STL file in Blender and export the mesh as an Obj or 3ds
object. Convert that using PoseRay to use the mesh in PovRay. (or use
the PovRay exporter to export it to a pov file directly by rendering it.
(You will need to deselect the "delete" flag in the Render tab of the
properties screen, camera icon)
> Please continue to provide assistance to me in regards to make my NASA
> STL meshes solid. Thanks.
>
https://blender.stackexchange.com/questions
Is a good site to ask Blender questions unrelated to PovRay.
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--
Regards
Stephen
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