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Earthview: Difference between revisions
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It is possible to assign any image you fancy to be used as a tile by Earthview. For this, you can edit the file '''earth_unitscale_rawuv.ac''' to load your images, and edit '''earth.xml''' such that it points to your just edited 3d model via <path>earth_unitscale_rawuv.ac</path>. You can do the same for '''cloudsphere.xml'''. However, assigning textures in this manner, as they are to the "rawuv" sphere, creates visible seams where the texture sheets end. This is particularly visible if parallax mapping is rendered as the computation requires shifting the textures over the sphere. | It is possible to assign any image you fancy to be used as a tile by Earthview. For this, you can edit the file '''earth_unitscale_rawuv.ac''' to load your images, and edit '''earth.xml''' such that it points to your just edited 3d model via <path>earth_unitscale_rawuv.ac</path>. You can do the same for '''cloudsphere.xml'''. However, assigning textures in this manner, as they are to the "rawuv" sphere, creates visible seams where the texture sheets end. This is particularly visible if parallax mapping is rendered as the computation requires shifting the textures over the sphere. | ||
The solution is to add margins that encompass a bit of the neighbouring tiles. This is what [https://github.com/chris-blues/Nasa2FGearthview Nasa2FGearthview] is doing (as well as the texture set provided). These bordered tiles don't use '''earth_unitscale_rawuv.ac''' but instead '''earth_unitscale_hires.ac''', which is the default (see [https://forum.flightgear.org/viewtopic.php?f=6&t=15754&start=135#p207629 this forum post] for the original discussion). In other words, if you use [https://github.com/chris-blues/Nasa2FGearthview Nasa2FGearthview] to generate your own textures, you do not need to change '''earth.xml''' nor '''earth_unitscale_rawuv.ac''' | The solution is to add margins that encompass a bit of the neighbouring tiles. This is what [https://github.com/chris-blues/Nasa2FGearthview Nasa2FGearthview] is doing (as well as the texture set provided). These bordered tiles don't use '''earth_unitscale_rawuv.ac''' but instead '''earth_unitscale_hires.ac''', which is the default (see [https://forum.flightgear.org/viewtopic.php?f=6&t=15754&start=135#p207629 this forum post] for the original discussion). In other words, if you use [https://github.com/chris-blues/Nasa2FGearthview Nasa2FGearthview] to generate your own textures, you do not need to change '''earth.xml''' nor '''earth_unitscale_rawuv.ac'''. Notice that you still need to edit '''earth_unitscale_hires.ac''' (and the rest of the '''earth_*.ac''') if you want to use dds tiles! | ||