Now reading data from files

aircraft/javaprop2jsbcpct.py

@@ -2,14 +2,40 @@
 #-*- coding:utf-8 -*-
 
 import argparse
+import os
+
+def parse_data_files(input_files, blade_angles):
+	blade_angles = list(map(float, blade_angles))
+	data = {}
+	for file, angle in zip(input_files, blade_angles):
+		with open(file) as f:
+			content = f.readlines()
+		
+		content = list(map(lambda s: s.strip().split("\t"), content))[2:]
+		data[angle] = {}
+		for line in content:
+			data[angle][float(line[0])] = {"Ct": float(line[2]), "Cp": float(line[3])}
+	
+	return data
+
 
 if __name__ == "__main__":
 	argp = argparse.ArgumentParser(description="javaprop2jsbcpct.py - converts JavaProp propeller data into Cp and Ct tables for a JSBsim propelller")
 	
 	argp.add_argument(
 		"-i", "--input-file",
-		help="File to read JavaProp data from",
-		required=True
+		help="Files to read JavaProp data from (one per blade angle)",
+		required=True,
+		nargs="+",
+		dest="input_files"
+	)
+	
+	argp.add_argument(
+		"-b", "--blade-angle",
+		help="Blade angles of the JavaProp data files (one per file)",
+		required=True,
+		nargs="+",
+		dest="blade_angles"
 	)
 	
 	argp.add_argument(
@@ -25,4 +51,17 @@ if __name__ == "__main__":
 	)
 	
 	args = argp.parse_args()
-	print(args)
+	
+	for path in args.input_files:
+		if not os.path.isfile(path):
+			print(f"Error: input file {path} not found, exiting")
+			sys.exit(1)
+	
+	if len(args.blade_angles) < len(args.input_files):
+		print("Error: less blade angles than input files")
+	elif len(args.blade_angles) > len(args.input_files):
+		args.blade_angles, rest = args.blade_angles[:len(args.input_files)]
+		print(f"Warning: skipping {len(rest)} blade angles because no corresponding data file was specified")
+	
+	data = parse_data_files(args.input_files, args.blade_angles)
+