Celestia Forums

http://en.wikipedia.org/wiki/VRML
http://en.wikipedia.org/wiki/3ds

Standard formats are strange things indeed

The 3ds export script is not officialy supported and has some issues.
I am asking me why there is a converter from a high prized commercial proprieter file format for a free opensource programm but not one single converter for a open standart file format?

Meanwhile the modeling, I have noticed the following: - As I was thinking making 3 models represent much more work in 2 aspects: The modeling: The use of a decimation tool is unfortunatly not the ultimate and easiest solution. Lot of meshes have to be treaten with special care, in some case you wil...

I suppose the automated hierachy you are suggesting would be based on size or poly count, but as I pointed on the above example, some exeption can exist like strong contrast in color or form... what about those case? This a job for a texture as the inside of the door would be a texture at about lev...

Looks good, I would like to try this on Linux

http://hubblesite.org/sci.d.tech/behind_the_pictures/meaning_of_color/filters.shtml http://hubblesite.org/sci.d.tech/behind_the_pictures/meaning_of_color/hubble.shtml http://hubblesite.org/sci.d.tech/behind_the_pictures/meaning_of_color/rgb.shtml http://hubblesite.org/sci.d.tech/behind_the_pictures/...

I do not know if this is a bug but it can be, as I observed a out of sync in the shadow on the earth and nightfall at my location.

Don, I don't know what you'd call a "real good VT utility", but my simple virtualtex script has cut many many 32k textures into tiles already with just one command during the last 2 years. Many people have used it without any problems. You dont' want a "click" menue type of structure for this, do y...

If I got it right, the land part is finished but the water part is tricky. Can you write down, what the real good VT utility has to do in detail? I know the right lib to implement this big picture manipulations ;) It looks like the celestia source is a bit over my head at the moment, but a VT utilit...

Yes and no. The things you imagine are possible to fake with textures but to get it look right an animated mesh is needed.

I think he's just referring to the movement of the solar system in space and how cool it would look if the the planets would not just show there orbits but additional there trace in space drawn like the orbits.

You are right but, the answer to question 2) [wich to skip?] should be NONE. This is obviously impossible. So this feature must be for specific objects only. Not for entire classes of objects. Why not change all ojects that have the feature? Accordingly to these answers and in order to be realistic...

Blue Marble Next Generation I am wating for this a long time

Celestia loads things as needed. If you do scripts you know there is a command to preload textures, so your script will run better if it get to an object with a loaded texture. But this topic is a little bit tricky, because there is the memory of the graphiccard and your system main RAM. The bottom ...

Clearly, if Celestia ever will involve multi-wavelength displays, we should contemplate about a false color standard encoding to be applied to all IR imaging in Celestia. Same for UV. So people will quickly memorize the color - wavelength correspondence and can immediately read off the dominant emi...

Seemless is just asked too much for a start. Astronomers also do not use "seamless" filters in reality. In my view we should start with a discrete set that implements the most common wavelength bands that are used in astronomy/space explorations I think there are not things like common wavelength b...

I did not think about the stars! This would be a great point to start but I think we need then one more thing to o it right, the source spectum of every star in the catalog. IMHO to get the source spectum of the stars is a task for the sciense team and not that easy with the binary star errors in th...

1. logarythmical from 1pm to 10 Mm (pm, nm, um, mm, m, km, Mm) with 3 digits after the point (333.333 nm) A new texture every 0.001 nm? You don't propose to store about 400000 textures alone for the visual spectrum, do you? Nope, this says, that we would have a grain size of a 1/1000 at the actual ...

http://celestiaproject.net/forum/viewtopic.php?t=6054&start=0&postdays=0&postorder=asc&highlight= 1. logarythmical from 1pm to 10 Mm (pm, nm, um, mm, m, km, Mm) with 3 digits after the point (333.333 nm) 2. 1 and 3 band images, raw, color tables and sensor data. Where 1 band is 8bit ...

0.5; 0; 1; 0 (I hope 0.5 eqals 180?° on the y axis) * old axis quad = new axis quat
I know this is not what you asked for but I would need to look at the code to give exact units and signs.