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  "Title": "Generates and Samples Realistic Terrestrial Atmospheres",
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  "Authors@R": "c(\nperson(\n\"Tyler\", \"Morgan-Wall\",\nemail = \"tylermw@gmail.com\",\nrole = c(\"aut\", \"cre\", \"cph\")\n),\nperson(\n\"Petr\", \"Vevoda\",\nrole = \"ctb\"\n),\nperson(\n\"Charles University\",\nrole = \"cph\"\n),\nperson(\n\"Eric\", \"Bruneton\",\nrole = c(\"ctb\", \"cph\")\n),\nperson(\n\"Lukas\", \"Hosek\",\nrole = c(\"ctb\", \"cph\")\n),\nperson(\n\"Alexander\", \"Wilkie\",\nrole = c(\"ctb\", \"cph\")\n)\n)",
  "Description": "Generates physically based sky environment maps and\nradiance samples using the spectral Hosek-Wilkie and Prague\natmosphere models. Functions write high-dynamic-range 'OpenEXR'\ndomes in latitude-longitude projections, compute per-direction\nRGB or 55-channel values, and optionally composite\ntime-accurate star fields and moon phases. Features include\nautomatic sun and moon positioning from date, time and\nlocation, support for sea-level and high-altitude observers,\nwide-spectrum coefficients, and multithreaded C++ acceleration\nfor fast, high-resolution output. For model details, see Hosek\nand Wilkie (2012) <doi:10.1145/2185520.2185591>, Hosek and\nWilkie (2013) <doi:10.1109/MCG.2013.18>, Wilkie et al. (2021)\n<doi:10.1145/3450626.3459758>, and Vevoda et al. (2022)\n<doi:10.1111/cgf.14677>.",
  "License": "GPL-3",
  "Copyright": "file inst/COPYRIGHTS",
  "Encoding": "UTF-8",
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  "URL": "https://www.skymodelr.com",
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  "Author": "Tyler Morgan-Wall [aut, cre, cph], Petr Vevoda [ctb], Charles\nUniversity [cph], Eric Bruneton [ctb, cph], Lukas Hosek [ctb,\ncph], Alexander Wilkie [ctb, cph]",
  "Maintainer": "Tyler Morgan-Wall <tylermw@gmail.com>",
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    "calculate_sky_radiance",
    "calculate_sky_values",
    "calculate_sun_brightness",
    "clear_sky_data",
    "download_sky_data",
    "generate_moon_latlong",
    "generate_planets",
    "generate_sky",
    "generate_sky_latlong",
    "generate_stars",
    "list_sky_data"
  ],
  "_datasets": [
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      "name": "stars",
      "title": "Star catalog used for sky rendering",
      "object": "stars",
      "class": [
        "data.frame"
      ],
      "fields": [
        "bsc_number",
        "ra_rad",
        "dec_rad",
        "v_mag",
        "spec",
        "r",
        "g",
        "b"
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      "table": true,
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    }
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  "_help": [
    {
      "page": "calculate_sky_radiance",
      "title": "Sample Prague sky radiance at a chosen wavelength.",
      "topics": [
        "calculate_sky_radiance"
      ]
    },
    {
      "page": "calculate_sky_values",
      "title": "Sample a direction from the Prague model.",
      "topics": [
        "calculate_sky_values"
      ]
    },
    {
      "page": "calculate_sun_brightness",
      "title": "Sample sun luminance at the disk center.",
      "topics": [
        "calculate_sun_brightness"
      ]
    },
    {
      "page": "clear_sky_data",
      "title": "Clear cached sky data files",
      "topics": [
        "clear_sky_data"
      ]
    },
    {
      "page": "download_sky_data",
      "title": "Download Prague Sky Model Coefficient Data",
      "topics": [
        "download_sky_data"
      ]
    },
    {
      "page": "generate_moon_latlong",
      "title": "Generate the atmosphere with the moon",
      "topics": [
        "generate_moon_latlong"
      ]
    },
    {
      "page": "generate_planets",
      "title": "Generate a bright-planet image array",
      "topics": [
        "generate_planets"
      ]
    },
    {
      "page": "generate_sky",
      "title": "Generate a Hosek-Wilkie sky dome array",
      "topics": [
        "generate_sky"
      ]
    },
    {
      "page": "generate_sky_latlong",
      "title": "Generate a location and time-specific sky dome (optionally with stars)",
      "topics": [
        "generate_sky_latlong"
      ]
    },
    {
      "page": "generate_stars",
      "title": "Generate a star-field array aligned with 'generate_sky()'",
      "topics": [
        "generate_stars"
      ]
    },
    {
      "page": "list_sky_data",
      "title": "List cached sky data files",
      "topics": [
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      ]
    }
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