From 539f783a7eba249f4221c4013032a05839ac3282 Mon Sep 17 00:00:00 2001
From: lassulus <lassulus@lassul.us>
Date: Mon, 23 Mar 2020 09:55:58 +0100
Subject: nomads-cloud: init

---
 krebs/5pkgs/simple/nomads-cloud/default.nix | 43 +++++++++++++++++++++++++++++
 1 file changed, 43 insertions(+)
 create mode 100644 krebs/5pkgs/simple/nomads-cloud/default.nix

(limited to 'krebs/5pkgs/simple/nomads-cloud')

diff --git a/krebs/5pkgs/simple/nomads-cloud/default.nix b/krebs/5pkgs/simple/nomads-cloud/default.nix
new file mode 100644
index 000000000..2af74dc44
--- /dev/null
+++ b/krebs/5pkgs/simple/nomads-cloud/default.nix
@@ -0,0 +1,43 @@
+{ writers, coreutils, grib2json, curl, jq, findutils, imagemagick }:
+writers.writeDashBin "nomads-cloud" ''
+  prefix=$(mktemp -d)
+  grib_path=$prefix.grib
+  json_path=$prefix.json
+  pgm_path=$prefix.pgm
+  png_path="$1"
+
+  mkdir -p "$prefix"
+
+  date=$(${coreutils}/bin/date +%Y%m%d)
+  for hour in 18 12 06 00; do
+    url="https://nomads.ncep.noaa.gov/cgi-bin/filter_gfs_0p25_1hr.pl?file=gfs.t''${hour}z.pgrb2.0p25.anl&lev_entire_atmosphere_%5C%28considered_as_a_single_layer%5C%29=on&var_CWAT=on&leftlon=-180&rightlon=180&toplat=90&bottomlat=-90&dir=%2Fgfs.$date%2F$hour"
+    ${curl}/bin/curl -fsS "$url" > "$grib_path"
+    if [ "$?" -eq 0 ]; then
+      break
+    fi
+  done
+  ${grib2json}/bin/grib2json --data "$grib_path" > "$json_path"
+
+  width=$(${jq}/bin/jq '.[0].header.nx' < "$json_path")
+  height=$(${jq}/bin/jq '.[0].header.ny' < "$json_path")
+
+  # The maximum gray value.  Must be bigger than 0 and less than 65536.
+  maxval=256
+
+  # pgm - Netpbm grayscale image format
+  # http://netpbm.sourceforge.net/doc/pgm.html
+  {
+    echo P2
+    echo "$width $height"
+    echo "$maxval"
+    cat "$json_path" |
+    ${jq}/bin/jq --argjson maxval "$maxval" -c '
+      .[0].data[] * $maxval | round
+    ' |
+    ${findutils}/bin/xargs -n "$width"
+  } > "$pgm_path"
+
+  ${imagemagick}/bin/convert -roll +50% "$pgm_path" "$png_path"
+
+  rm -r "$prefix"
+''
-- 
cgit v1.2.3


From 119b56956c8bcb992c86ca8d0e854884e7c44695 Mon Sep 17 00:00:00 2001
From: lassulus <lassulus@lassul.us>
Date: Mon, 23 Mar 2020 18:47:23 +0100
Subject: nomads-cloud: double sqrt for better clouds

---
 krebs/5pkgs/simple/nomads-cloud/default.nix | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'krebs/5pkgs/simple/nomads-cloud')

diff --git a/krebs/5pkgs/simple/nomads-cloud/default.nix b/krebs/5pkgs/simple/nomads-cloud/default.nix
index 2af74dc44..9c39de891 100644
--- a/krebs/5pkgs/simple/nomads-cloud/default.nix
+++ b/krebs/5pkgs/simple/nomads-cloud/default.nix
@@ -22,7 +22,7 @@ writers.writeDashBin "nomads-cloud" ''
   height=$(${jq}/bin/jq '.[0].header.ny' < "$json_path")
 
   # The maximum gray value.  Must be bigger than 0 and less than 65536.
-  maxval=256
+  maxval=1000
 
   # pgm - Netpbm grayscale image format
   # http://netpbm.sourceforge.net/doc/pgm.html
@@ -32,7 +32,7 @@ writers.writeDashBin "nomads-cloud" ''
     echo "$maxval"
     cat "$json_path" |
     ${jq}/bin/jq --argjson maxval "$maxval" -c '
-      .[0].data[] * $maxval | round
+      ((.[0].data[] | sqrt | sqrt) * $maxval | round)
     ' |
     ${findutils}/bin/xargs -n "$width"
   } > "$pgm_path"
-- 
cgit v1.2.3


From e5cbe0cbe17a63854efc0271c1ae0d922a23572d Mon Sep 17 00:00:00 2001
From: lassulus <lassulus@lassul.us>
Date: Mon, 23 Mar 2020 20:28:29 +0100
Subject: realwallpaper: use cloud_gamme instead of sqrt hack

---
 krebs/5pkgs/simple/nomads-cloud/default.nix | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'krebs/5pkgs/simple/nomads-cloud')

diff --git a/krebs/5pkgs/simple/nomads-cloud/default.nix b/krebs/5pkgs/simple/nomads-cloud/default.nix
index 9c39de891..6e4ace484 100644
--- a/krebs/5pkgs/simple/nomads-cloud/default.nix
+++ b/krebs/5pkgs/simple/nomads-cloud/default.nix
@@ -32,7 +32,7 @@ writers.writeDashBin "nomads-cloud" ''
     echo "$maxval"
     cat "$json_path" |
     ${jq}/bin/jq --argjson maxval "$maxval" -c '
-      ((.[0].data[] | sqrt | sqrt) * $maxval | round)
+      ((.[0].data[]) * $maxval | round)
     ' |
     ${findutils}/bin/xargs -n "$width"
   } > "$pgm_path"
-- 
cgit v1.2.3