Add script to split up sky_clusters.txt

scripts/split_sky_clusters.py

@@ -0,0 +1,69 @@
+#!python3
+
+# Copyright (C) 2022, Frank Richter. All rights reserved.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License along
+# with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+# Split a monolithic sky_clusters.txt file into per-map sky cluster files.
+
+import argparse
+import os
+
+arguments = argparse.ArgumentParser()
+arguments.add_argument('gamedir', help='path to game directory')
+arg_values = arguments.parse_args()
+
+header = """# This file is part of the Q2RTX lighting system.
+# For this map, it lists BSP clusters with skybox and lava polygons
+# that have to be converted to analytic area lights.
+# For more information, see comments in the `path_tracer.h` file
+# in Q2RTX source code.
+
+"""
+gamedir = arg_values.gamedir
+
+line_iter = iter(open(os.path.join(gamedir, "sky_clusters.txt"), "r"))
+
+def next_line():
+    try:
+        line = next(line_iter)
+        line = line.rstrip()
+        comment_pos = line.find('#')
+        if comment_pos != -1:
+            line_no_comment = line[:comment_pos].rstrip()
+        else:
+            line_no_comment = line
+        return line, line_no_comment
+    except StopIteration:
+        return None, None # Indicate EOF
+
+# Track current per-map sky file
+current_sky_file = None
+
+line, line_no_comment = next_line()
+while line is not None:
+    if line_no_comment.isidentifier(): # recognize map names by first char being a letter
+        # We have a map file name, open sky file
+        map_name = line_no_comment
+        current_sky_file = open(os.path.join(gamedir, "maps", "sky", f"{map_name}.txt"), "w")
+        current_sky_file.write(header)
+    elif current_sky_file is not None:
+        # Write non-empty lines to sky file
+        if len(line) > 0:
+            print(line, file=current_sky_file)
+    line, line_no_comment = next_line()
+
+# Close current per-map sky file
+current_sky_file = None