From 1524fc23401b589ab6e923a75a0d58772ef72055 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Laura=20Kl=C3=BCnder?= <laura@codingcatgirl.de>
Date: Sun, 6 Aug 2017 20:52:21 +0200
Subject: [PATCH] first prototype for openscad rendering

---
 .../mapdata/management/commands/renderscad.py   | 17 +++++++++++++++++
 src/c3nav/mapdata/utils/scad.py                 |  7 +++++++
 2 files changed, 24 insertions(+)
 create mode 100644 src/c3nav/mapdata/management/commands/renderscad.py
 create mode 100644 src/c3nav/mapdata/utils/scad.py

diff --git a/src/c3nav/mapdata/management/commands/renderscad.py b/src/c3nav/mapdata/management/commands/renderscad.py
new file mode 100644
index 00000000..c89f6ac6
--- /dev/null
+++ b/src/c3nav/mapdata/management/commands/renderscad.py
@@ -0,0 +1,17 @@
+import os
+from django.conf import settings
+from django.core.management.base import BaseCommand
+
+from c3nav.mapdata.utils.scad import polygon_scad
+
+
+class Command(BaseCommand):
+    help = 'render the map to openscad'
+
+    def handle(self, *args, **options):
+        from c3nav.mapdata.models import AltitudeArea
+        filename = os.path.join(settings.RENDER_ROOT, 'all.scad')
+        with open(filename, 'w') as f:
+            for area in AltitudeArea.objects.all():
+                f.write('translate([0, 0, %.2f]) ' % area.altitude)
+                f.write(polygon_scad(area.geometry)+';\n')
diff --git a/src/c3nav/mapdata/utils/scad.py b/src/c3nav/mapdata/utils/scad.py
new file mode 100644
index 00000000..8e6349a7
--- /dev/null
+++ b/src/c3nav/mapdata/utils/scad.py
@@ -0,0 +1,7 @@
+import json
+
+from shapely.geometry import mapping
+
+
+def polygon_scad(polygon):
+    return 'polygon(points='+json.dumps(mapping(polygon)['coordinates'][0], separators=(',', ':'))+')'