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can aerial image maps be used to texture terrain?

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can aerial image maps be used to texture terrain?

Postby think nice things » Mon Apr 29, 2019 8:57 pm

Hi,

I read through several online sources how to configure fotorealistic terrain.
Although it seems to be possible I didn't find a straightforward way to do it with the current flightgear (w/o patching)
Can existing aerial image maps like "ESRI aerial" just be used for terrain texturing?
Could _any_ map tile source just be used for terrain texturing?

Here are the ESRI tiles:
https://server.arcgisonline.com/ArcGIS/ ... rver/tile/{z}/{y}/{x}

any help much appreciated!
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Re: can aerial image maps be used to texture terrain?

Postby Thorsten » Tue Apr 30, 2019 4:24 am

Although it seems to be possible I didn't find a straightforward way to do it with the current flightgear (w/o patching)
Can existing aerial image maps like "ESRI aerial" just be used for terrain texturing?


No, what you have read is likely correct - there's several ways to do it, but it always requires either core patches or special data structures/models to be created.
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Re: can aerial image maps be used to texture terrain?

Postby Hooray » Sat May 04, 2019 12:02 pm

There is a set of patches using "osgEarth" (search query for the forum/wiki).

Alternatively, there is a wiki article for unrelated C++ changes that make this possible.

We have also been toying with the idea of adapting the latter to come up with a dedicated new canvas "placement" so that arbitrary canvas textures can be draped over the terrain mesh, this would not be particularly complicated given what we have already - and there is also the ongoing compositor work, so that it's not too far-fetched to say that sooner or later, we will have all the bits and pieces in place to provide "native" support for these things.

For the time being, there are roughly half a dozen of different approaches/patches floating around, but using the Canvas system to come up with a terrain-mapping placement would seem like a fairly good idea, and it might even provide for a straightforward mechanism to re-integrate osgEarth on top of this approach.

From a Canvas standpoint, it doesn't matter at all - these are just "textures" after all, if/how and where they show up is a totally separate issue, and handled by so called "placements" - for the time being, we support model/cockpit, scenery and gui placements (dialogs/windows, tooltips) - coming up with a new placement type for property-based terrain-texturing would seem fairly straightforward and a very powerful idea at the same time, consolidating many existing ideas and patches along the way.
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