Difference between revisions of "Surface tile"
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| − | Surface Tiles are a way to use high resolution ground textures for a small local region, usually around a base. | + | '''Surface Tiles''' are a way to use high resolution ground [[textures]] for a small local region, usually around a base. |
The earth is split into 2048 tiles in latitude and 4096 tiles in longitude. | The earth is split into 2048 tiles in latitude and 4096 tiles in longitude. | ||
| − | The surface tiles in orbiter consist of two parts: The actual tile textures for the planet and the | + | The '''surface tiles''' in orbiter consist of two parts: The actual tile textures for the planet and the |
| − | surface tile definition in the configuration file of a base. | + | '''surface tile''' definition in the [[configuration file]] of a base. |
| + | ==Configuration file syntax== | ||
| − | + | The syntax for a '''surface tile''' list is | |
| − | The syntax for a surface tile list is | ||
<pre> | <pre> | ||
BEGIN_SURFTILELIST | BEGIN_SURFTILELIST | ||
| − | <texturelevel> <tilenumberfrommeridian_positive_for_east> <tilenumberfromequator_positive_north> | + | <texturelevel> <tilenumberfrommeridian_positive_for_east> <tilenumberfromequator_positive_north> <bitflag_for_transparency> |
END_SURFTILELIST | END_SURFTILELIST | ||
</pre> | </pre> | ||
| Line 22: | Line 22: | ||
</pre> | </pre> | ||
| − | The function for getting the tilenumber in latitude is: | + | The function for getting the tilenumber in [[latitude]] is: |
| + | |||
| + | TN_lat = 1024.0 * latitude / 90.0 | ||
| + | |||
| + | The function for getting the tilenumber in [[longitude]] is: | ||
| + | |||
| + | TN_long = 2048.0 * longitude / 180.0 | ||
| + | |||
| + | Each '''surface tile''' is roughly 5 x 5 km large. | ||
| − | + | The '''transparency bitflag''' is usually '''1'''. If the tile contains transparency in the alpha channel, the bitflag has to be changed to '''3''' | |
| − | + | ==Future developments== | |
| − | + | It is planned for future versions, to replace the '''surface tiles''' by a ultra high resolution [[planet texture]] (Level 15?). | |
| − | + | [[Category: Articles]] | |
| + | [[Category: Glossary]] | ||
Latest revision as of 03:49, 16 October 2022
Surface Tiles are a way to use high resolution ground textures for a small local region, usually around a base.
The earth is split into 2048 tiles in latitude and 4096 tiles in longitude.
The surface tiles in orbiter consist of two parts: The actual tile textures for the planet and the surface tile definition in the configuration file of a base.
Configuration file syntax[edit]
The syntax for a surface tile list is
BEGIN_SURFTILELIST <texturelevel> <tilenumberfrommeridian_positive_for_east> <tilenumberfromequator_positive_north> <bitflag_for_transparency> END_SURFTILELIST
The filenames for the textures follow a similar scheme:
<planet name>_<texture level>_<E/W><tile number in latitude>_<N/S><tile number in longitude>.dds
The function for getting the tilenumber in latitude is:
TN_lat = 1024.0 * latitude / 90.0
The function for getting the tilenumber in longitude is:
TN_long = 2048.0 * longitude / 180.0
Each surface tile is roughly 5 x 5 km large.
The transparency bitflag is usually 1. If the tile contains transparency in the alpha channel, the bitflag has to be changed to 3
Future developments[edit]
It is planned for future versions, to replace the surface tiles by a ultra high resolution planet texture (Level 15?).