Convert OBJ to JSON.

obj-to-json.py

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+#!/usr/bin/env python3
+# Description: Convert OBJ to JSON
+# Usage: python3 obj-to-json.py file.obj
+# Author: Justin Oros
+# Source: https://github.com/JustinOros
+
+import json
+import os
+import sys
+
+class OBJExporter:
+    def __init__(self, filename):
+        self.vertices = []
+        self.faces = []
+        self.normals = []
+        self.parse(filename)
+
+    def parse(self, filename):
+        with open(filename, 'r') as f:
+            for line in f:
+                if line.startswith('v '):
+                    parts = line.strip().split()
+                    self.vertices.append(list(map(float, parts[1:4])))
+                elif line.startswith('vn '):
+                    parts = line.strip().split()
+                    self.normals.append(list(map(float, parts[1:4])))
+                elif line.startswith('f '):
+                    face = []
+                    for vert in line.strip().split()[1:]:
+                        v_idx = vert.split('/')[0]
+                        face.append(int(v_idx)-1)
+                    self.faces.append(face)
+
+    def export_to_json(self, out_filename):
+        data = {
+            'vertices': self.vertices,
+            'faces': self.faces,
+            'normals': self.normals
+        }
+        with open(out_filename, 'w') as f:
+            json.dump(data, f)
+        print(f"Exported {out_filename}")
+
+if __name__ == "__main__":
+    if len(sys.argv) != 2:
+        print(f"Usage: {sys.argv[0]} <obj-file>")
+        sys.exit(1)
+
+    obj_file = sys.argv[1]
+
+    if not os.path.isfile(obj_file):
+        print(f"File not found: {obj_file}")
+        sys.exit(1)
+
+    base_name = os.path.splitext(obj_file)[0]
+    json_file = f"{base_name}.json"
+
+    exporter = OBJExporter(obj_file)
+    exporter.export_to_json(json_file)
+