Rarius wrote:

>>I want to model a starglobe. Can somebody help me with a starmap like
>>the attachment?
>>
>>Thanks and greetings...
>>Wijnand Nijs
> 
> 
> Try using my starmap include file... I hav attached it to this post... If 
> the attachement hasn't survived, you can download it from 
> http://www.rarius.co.uk/starmap.inc
> 
> There is an example made with it on the illustration page of my website 
> http://www.rarius.co.uk/
> 
> All you need to do is define a macro and then include the file...
> 
> #macro Star(vPosition, fMag)
>     sphere
>     {
>         vPosition
>         6-fMag
>      }
> #end
> 
> #include "starmap.inc"
> 
> The vPosition parameter is the star's position at a unit distance from the 
> origin.
> The fMag is the star's magnitude. It ranges from -1.1 to about 6
> 
> You can of course make the macro more complex... there is an example at the 
> top of the incude file itself...
> 
> The include file calls the Star() macro 9000+ times. Once for each star.
> 
> I compiled the include file using a simple VB program from the Bright Star 
> Catalogue, so it has every naked eye star on it.
> 
> Rarius 
> 


Do you (or somebody else) have any experience to use that include as a 
projection on a sphere? Including the signs of the zodiac?

Post a reply to this message

Jaap wrote:

> Wijnand Nijs <w.j### [at] alf4alldemonnl> wrote:
> 
>>Hello,
>>
>>I want to model a starglobe. Can somebody help me with a starmap like
>>the attachment?
>>
> 
> i have used this program a long time ago:
> 
> http://www.m31.spb.ru/StarCalc/main.htm
> 
> maybe you can do a screen-dump from it?
> 
> jaap.
> 
> 
> 
> ------------------------------------------------------------------------
> 

Verry good idea, I wil try is for sure. Thanks.

Wijnand

Post a reply to this message

Wijnand Nijs wrote:

> Jaap wrote:
> 
>> Wijnand Nijs <w.j### [at] alf4alldemonnl> wrote:
>>
>>> Hello,
>>>
>>> I want to model a starglobe. Can somebody help me with a starmap like
>>> the attachment?
>>>
>>
>> i have used this program a long time ago:
>>
>> http://www.m31.spb.ru/StarCalc/main.htm
>>
>> maybe you can do a screen-dump from it?
>>
>> jaap.
>>
>>
>>
>> ------------------------------------------------------------------------
>>
> 
> Verry good idea, I wil try is for sure. Thanks.
> 
> Wijnand

Is there a way to project that kind of maps (see attachment) on a on a 
sphere?

Wijnand

Post a reply to this message

Attachments:
Download 'map.jpg' (83 KB)

Preview of image 'map.jpg'

Wijnand Nijs wrote:

>>
>> Verry good idea, I wil try is for sure. Thanks.
>>
>> Wijnand
> 
> 
> Is there a way to project that kind of maps (see attachment) on a on a 
> sphere?
> 
> Wijnand
If you use a triangular mesh or a set of bicubic patches as an approximation
of a sphere you can use UV mapping.

It might also be possible to use straight 'bitmap's, possibly with a
'map_type' option. Perhaps only after distorting the image (and perhaps
the program can output another projections). (No time now to
check this ATM).

Post a reply to this message

>> #macro Star(vPosition, fMag)
>>     sphere
>>     {
>>         vPosition
>>         6-fMag
>>      }
>> #end
>
> Do you (or somebody else) have any experience to use that include as a
> projection on a sphere? Including the signs of the zodiac?
>

It already is projected onto a sphere...

OK.. I've started it off for you... See attachements

Note that the stars ARE the wrong way round... as they should be on a sphere 
like you want to make... The include file was written with the intention of 
the camera being INSIDE the sphere...

I do have another include file with some constellation shapes in it, but it 
is VERY incomplete...

Any questions...

Rarius

Post a reply to this message

Attachments:
Download 'starglobe.png' (139 KB) Download 'starglobe.pov.txt' (2 KB)

Preview of image 'starglobe.png'

Rarius wrote:

>>>#macro Star(vPosition, fMag)
>>>    sphere
>>>    {
>>>        vPosition
>>>        6-fMag
>>>     }
>>>#end
>>
>>Do you (or somebody else) have any experience to use that include as a
>>projection on a sphere? Including the signs of the zodiac?
>>
> 
> 
> It already is projected onto a sphere...
> 
> OK.. I've started it off for you... See attachements
> 
> Note that the stars ARE the wrong way round... as they should be on a sphere 
> like you want to make... The include file was written with the intention of 
> the camera being INSIDE the sphere...
> 
> I do have another include file with some constellation shapes in it, but it 
> is VERY incomplete...
> 
> Any questions...
> 
> Rarius 
> 

Thank you very much Rarius. It looks verry good. I am interrested in the 
other include file with the constellation shapes, how you do it and 
maybe I can finish it?

I wil also try the method of Jaap Stolk.

Thanks again...
Wijnand

Post a reply to this message

Wijnand Nijs <w.j### [at] alf4alldemonnl> wrote:
> I wil also try the method of Jaap Stolk.

please don't. :-) i think the include file is a mutch better solution.
the include file is more flexible (and probably also faster) than using
a (hi-res!) bitmap.

jaap.

Post a reply to this message