mirror of
https://github.com/OpenSpace/OpenSpace.git
synced 2026-04-27 14:29:37 -05:00
Gene Payne
d9da0bef74
* Remove debris assets that are no longer supported by celestrak
* Revert "Remove debris assets that are no longer supported by celestrak" (commit c8e5f3f)
* Updated all satellite assets to use the new celestrak URL format
125 lines
3.4 KiB
Lua
125 lines
3.4 KiB
Lua
local transforms = asset.require("scene/solarsystem/planets/earth/transforms")
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function downloadTLEFile(sceneAsset, url, name, filename)
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local identifier = name
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identifier = identifier:gsub(" ", "")
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identifier = identifier:gsub("&", "")
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identifier = identifier:gsub("-", "")
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local urlSyncTable = {
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Name = "Satellite TLE Data (" .. name .. ")",
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Type = "UrlSynchronization",
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Identifier = "satellite_tle_data_" .. identifier,
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Url = url,
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Override = true
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}
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if (filename ~= "") then
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urlSyncTable.Filename = filename
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end
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return sceneAsset.syncedResource(urlSyncTable)
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end
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-- Check format of a set of 3 TLE file lines and return nonzero if there is a format error
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function isValidTLEFileFormat(lineArr)
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local function isEmpty(s) return s == nil or s == "" end
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if isEmpty(lineArr[1]) or isEmpty(lineArr[2]) or isEmpty(lineArr[3]) then
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return false
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end
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if string.sub(lineArr[2], 1, 2) ~= "1 " then
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return false
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end
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if string.sub(lineArr[3], 1, 2) ~= "2 " then
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return false
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end
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return true
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end
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local makeSingleLineElement = function(tle, filename)
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local path = tle .. "/" .. filename
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local file = io.open(path, "r")
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assert(file, "File not found: " .. path)
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local line = {
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file:read("*l"), --title line
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file:read("*l"),
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file:read("*l")
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}
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assert(isValidTLEFileFormat(line), "TLE file syntax error on line " .. 1 .. ": " .. path)
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-- Trim string
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line[1] = line[1]:gsub("^%s*(.-)%s*$", "%1")
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line[1] = line[1]:gsub("%s+", "_")
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line[1] = line[1]:gsub("[%-()]", "")
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--local title = line[1]
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return line
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end
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function numLinesInFile(filename)
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local ctr = 0
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for _ in io.lines(filename) do ctr = ctr + 1 end
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return ctr
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end
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local getPeriodFromElement = function(element)
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-- Get period from correct location of the string
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local per = tonumber(string.sub(element[3], 53, 63))
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-- Trail for 2x a single revolution
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per = 1.0 / per
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return per
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end
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function satellites(title, file, color, group)
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return {
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Identifier = title,
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Parent = transforms.EarthInertial.Identifier,
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Renderable = {
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Type = "RenderableSatellites",
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Path = file,
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SegmentQuality = 3,
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Color = color,
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Fade = 1.5,
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RenderBinMode = "PostDeferredTransparent",
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StartRenderIdx = group.StartRenderIdx,
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RenderSize = group.RenderSize
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},
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Tag = { "earth_satellites" },
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GUI = {
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Name = group.Title,
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Path = "/Solar System/Planets/Earth/Satellites",
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Description = group.Description
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}
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}
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end
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local registerSatelliteGroupObjects = function(containingAsset, group, tleFolder, shouldAddDuplicates)
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local filename = group.Filename
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local filenameSansExt = filename:gsub(filename:match("(%.%w+)$"), "")
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local path = tleFolder .. "/" .. filename
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local SatelliteBatch = satellites(filenameSansExt, path, group.TrailColor, group)
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containingAsset.onInitialize(function()
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openspace.addSceneGraphNode(SatelliteBatch)
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end)
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containingAsset.onDeinitialize(function()
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openspace.removeSceneGraphNode(SatelliteBatch)
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end)
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containingAsset.export(SatelliteBatch)
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end
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asset.export("downloadTLEFile", downloadTLEFile)
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asset.export("isValidTLEFileFormat", isValidTLEFileFormat)
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asset.export("numLinesInFile", numLinesInFile)
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asset.export("makeSingleLineElement", makeSingleLineElement)
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asset.export("getPeriodFromElement", getPeriodFromElement)
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asset.export("registerSatelliteGroupObjects", registerSatelliteGroupObjects)
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