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Author Topic: planet textures  (Read 1675 times)
Bigryan
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planet textures
« on: October 12, 2007, 07:58:41 pm »

Hi I'm trying to add planet textures for a game I'm making.  How are they generated in Urquan Masters?  What I would like is to get the 2d images of the planets and then wrap them around an opengl sphere.  Any advice on how to go about this?
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Amiga_Nut
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Re: planet textures
« Reply #1 on: October 13, 2007, 03:31:34 am »

I can maybe help you out here. The thing I would do in this case is image map a sphere and then bake the craters and detail onto the object. You would then have images with the polar scaling intact and ready for use as you said. I could whip up a few in Lightwave.  The 3DO image maps have this effect but they were really low quality. I suppose you could use them, but I'm thinking why? Also, is color the only map you’re doing? Do you want bump maps as well?

Here's one I prepared earlier! This is an auric moon lit from one direction only.
(Cylindrical image map for a sphere)


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Novus
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Re: planet textures
« Reply #2 on: October 13, 2007, 10:15:05 am »

You will probably want to read the UQM developer documentation on planet topography generation and planet surface rendering. The relevant code is in src/sc2code/planets/gentopo.c and src/sc2code/planets/plangen.c.
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Bigryan
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Re: planet textures
« Reply #3 on: October 14, 2007, 06:44:18 pm »

thanks novus.  I guess all planet textures are generated by code on the fly.  Very cool.

I haven't figured out how I'll do it yet.  Perhaps I'll do something silimar but more simple.  My original thought was that they were all textures that had been photoshoped, but I guess space was an issue when sc2 was made and code took up a lot less of it.

I wanted originally a bunch of jpg/png images that I could just call up as resources.  but this can also be quite cool.
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