Add a command to create a panorama from the command-line

README.md

@@ -145,3 +145,10 @@ Installing celutz
 -----------------
 
 See `INSTALL.md`.
+
+Advanced usage
+--------------
+
+To create a panorama from the command-line, see:
+
+    ./manage.py create_pano -h

panorama/management/commands/create_pano.py

@@ -0,0 +1,56 @@
+# -*- coding: utf-8 -*-
+
+"""
+Create a panorama from the command line.  This is useful when manipulating large image files.
+
+"""
+
+from __future__ import unicode_literals, division, print_function
+
+import sys
+import os
+
+from django.core.management.base import BaseCommand, CommandError
+from django.core.files import File
+from django.core.exceptions import ObjectDoesNotExist
+from django.conf import settings
+
+from altitude.providers import get_altitude
+from panorama.models import Panorama, ReferencePoint, Reference
+
+
+class Command(BaseCommand):
+    help = __doc__
+
+    def add_arguments(self, parser):
+        parser.add_argument('--name', '-n', required=True,
+                            help='Name of the panorama')
+        parser.add_argument('--image', '-i', required=True,
+                            help='Image of the panorama to create')
+        parser.add_argument('--latitude', '-l', type=float, required=True)
+        parser.add_argument('--longitude', '-L', type=float, required=True)
+        parser.add_argument('--height', '-H', type=float, required=True,
+                            help='Height above ground, in meters')
+        parser.add_argument('--loop', action='store_true', help='Is the image a 360° panorama?')
+
+    def handle(self, *args, **options):
+        self.stdout.write("Getting ground altitude for these coordinates...")
+        alt = get_altitude([settings.ALTITUDE_PROVIDERS[0]],
+                           timeout=10.,
+                           latitude=options['latitude'],
+                           longitude=options['longitude'])
+        self.stdout.write("Ground altitude is {}m".format(alt))
+        p = Panorama(name=options["name"], latitude=options["latitude"],
+                     longitude=options["longitude"],
+                     ground_altitude=alt,
+                     height_above_ground=options["height"],
+                     loop=options["loop"])
+        # http://www.revsys.com/blog/2014/dec/03/loading-django-files-from-code/
+        with open(options['image'], "rb") as f:
+            self.stdout.write("Reading image file...")
+            p.image.save(os.path.basename(options['image']), File(f), save=False)
+            self.stdout.write("Saving panorama to database...")
+            p.save()
+        self.stdout.write("Launching tile generation...")
+        p.generate_tiles()
+        self.stdout.write("Success!")