Celestial sphere

[Jezza]

OK , I am off on one of my little discoveries... <img src=/S/flee.gif border=0 alt=flee width=25 height=25>

I am looking for some form of software that will allow me to draw a celestial sphere. I have an example below but looking for a way where I can change the number of longitude and latitude lines. I am not looking for graphic applications but an application that can calculate and do the design automatically.

Probably looking for something too special here, but is worth a try

[AlanMiller]

Dunno if this will be of any help: Imageraw Celestial Sphere.bjb.svg - Wikibooks, collection of open-content textbooks

Not even sure how the SVG is meant to work? <img src=/S/confused.gif border=0 alt=confused width=15 height=20>

Alan

[Jezza]

Nope, sadly not, I understand the principles of how to draw it, I want to have it pre-drawn. I am studying the works of M C Escher at the moment and an fascinated with his sphere pictures and wanted to see if there were celestial "grids" I could print off and have a go myself...

[Waggers]

Not sure if any of these would contain the functionality <img src=/S/shrug.gif border=0 alt=shrug width=39 height=15>
This is also worth a look - not because it gives you what you asked for, but because it's one of the most patronising replies I've ever seen on a web forum <img src=/S/evilgrin.gif border=0 alt=evilgrin width=15 height=15>

[Jezza]

I don't know why i didn't think of this before as you were the guy who introduced this to me a few years back:

Pov-ray ....here is a dabbling <img src=/S/grin.gif border=0 alt=grin width=15 height=15>

[Jezza]

Ouch, now it is getting addictive......

Change in latitude position and distance between the longitude and latitude and move the lights <img src=/S/grin.gif border=0 alt=grin width=15 height=15>

[StuartR]

It seems to have lost its little wicker basket

StuartR

[Waggers]

My gerbils would love that <img src=/S/evilgrin.gif border=0 alt=evilgrin width=15 height=15>

[Jezza]

He he

Here is one for John, Paul, George and Ringo. Pole to Pole

This is the last one now of to become the new M.C.Escher (in my dreams) <img src=/S/artist.gif border=0 alt=artist width=34 height=29>


and for anyone who wants to try it and wants the code:

<pre>#include "functions.inc"
#include "colors.inc"

camera { location <0, 1, 4> look_at <0, 0, 0> angle 40}

sky_sphere {
pigment {
gradient y
color_map {
[ 1.0 color White ]
[ 1.0 color White ]
}
scale 2
translate -1
}
}


light_source {<-100,200,200> colour rgb 1}

#declare R=1.3;

#declare F=function {f_mesh1(x,y,z,0.2,0.2,3,0,3) - 0.03}

isosurface {
function { F(f_ph(x,y,z), f_r(x,y,z)-1, f_th(x,y,z)) }
max_gradient 10
contained_by{sphere {0,R}}
pigment {rgb .9}
finish {phong 0.5 phong_size 10}
}
</pre>

[Granville]

<img src=/S/ouch.gif border=0 alt=ouch width=15 height=15> You should post a health warning on this.

"I am now in your power! I am now in your power!" <img src=/S/dizzy.gif border=0 alt=dizzy width=15 height=15>

Seriously though that is starting to look very Escher-esk!

[Jezza]

Granville

This has opened a door to another world....do I dare walk through it <img src=/S/hiding.gif border=0 alt=hiding width=70 height=24>

M C Escher meets pov-ray ....I think I must have missed the bus, but if I run I may get on

[AlanMiller]

Very nice rendering. I think I misinterpreted what you were looking for. But I'm glad POV-Ray did the trick.

Alan

[diegol]

Beautiful. I've always wanted to play with Pov-ray and Blender, but never really had the time to. It seems to me they'll remain in my wish list forever.