1 files changed, 58 insertions, 0 deletions
diff --git a/resource/extract.py b/resource/extract.py
new file mode 100755
index 0000000..e867d10
--- /dev/null
+++ b/resource/extract.py
@@ -0,0 +1,58 @@
+#!/usr/bin/env python3
+
+import json
+import os
+import sys
+
+from PIL import Image
+
+
+if len(sys.argv) != 4:
+	sys.exit('Usage: extract.py <blocks.json> <asset directory> <colors.json>')
+
+def mean_color(texture):
+	path = os.path.join(sys.argv[2], texture + '.png')
+	im = Image.open(path)
+
+	data = im.convert('RGBA').getdata()
+	a = sum([a for (r, g, b, a) in data])
+	if a == 0:
+		return None
+
+	r = sum([r * a for (r, g, b, a) in data])
+	g = sum([g * a for (r, g, b, a) in data])
+	b = sum([b * a for (r, g, b, a) in data])
+	return {
+		'r': r / a,
+		'g': g / a,
+		'b': b / a,
+	}
+
+
+with open(sys.argv[1]) as f:
+	blocks = json.load(f)
+
+output = {}
+
+for name, info in blocks.items():
+	id = 'minecraft:' + name
+
+	output[id] = {
+		'color': {'r': 0, 'g': 0, 'b': 0},
+		'opaque': False,
+		'green': False,
+		'blue': False,
+	}
+
+	if info is None:
+		continue
+
+	color = mean_color(info.get('texture', name))
+	if color:
+		output[id]['color'] = color
+		output[id]['opaque'] = True
+		output[id]['green'] = info.get('green', False)
+		output[id]['blue'] = info.get('blue', False)
+
+with open(sys.argv[3], 'w') as f:
+	json.dump(output, f)