Spheres like Earth

jreuschel1 · Post by **jreuschel1** » Sun Nov 09, 2008 3:20 am

I'll have to remake this, my free web host got it's entire site shut down now even I don't have the source anymore.

dead link removed

Dark_Kilauea · Post by **Dark_Kilauea** » Sun Nov 09, 2008 8:20 pm

I demand a screenshot!

JP · Post by JP » Mon Nov 10, 2008 8:40 am

yeah post a description and sceenie please! no one wants to waste time download something as ambiguous as "spheres like earth"...

rogerborg · Post by **rogerborg** » Mon Nov 10, 2008 11:01 am

Here you go:

Mirror · Post by **Mirror** » Mon Nov 10, 2008 4:06 pm

well the initial screen indeed is a black one as rogerborg posted but that's because he hasn't disabled backfaceculling and the camera is in the center of a sphere. from my understanding what he has achieved ( as i checked the app ) is having a camera ( spaceship ) rotate around a sphere ( planet ) and the good thing is that the camera is free to move ( it gets affected by the current upvector ).

jontan6 · Post by **jontan6** » Tue Nov 11, 2008 3:27 pm

jreuschel1 · Post by **jreuschel1** » Wed Nov 12, 2008 12:14 pm

Thanks for the screenshot jontan

I just uploaded a better version but since it is a work in progress more is still to come

_______________

This is a fast "Earth type" planet generator and.

the planet terrains are generated in low detail first on the surface of a cube with 21x21 square faces on each of the 6 faces of the cube the cube is then normalized into a sphere. There is a 21x21 square face convex panel that is rendered between the low detail sphere and the camera this panel has 21x21 square faces each of which has 16x16subsquares and is a higher detail copy of visible area of the low detail sphere which it covers

the planet earth is approx 25,000 miles circumference
25,000 / (21x4) = approx 300x300 miles on largest square faces
300 / 16 = approx 20 miles between the vertices in the small square faces

future plans are to add another level of detail to include texture blending

maybe for a space simulator that allows you to cross galaxies and see many many different planets in high detail. if you like the planet, land on it and build a city.

and all in less then a few megabytes.
______________________

BlindSide · Post by **BlindSide** » Thu Nov 13, 2008 5:24 am

On my pc is looks like this:

I can't find any way to tesselate to a higher detail and I've tried coming in real close and pressing all of the (Undocumented) buttons repeatedly.

Either way, good work, the projecting a tessellated cube to a sphere idea is pretty cool. I think ultramedia is using a similar idea guessing from his screenshots.

Cheers

jreuschel1 · Post by **jreuschel1** » Thu Nov 13, 2008 5:34 pm

the 'L' key should show you the higher detail blindside.

Irrlicht Engine

Spheres like Earth

Spheres like Earth

Description