Handle retail park streams and spline headers across all disc maps

tools/asset_pipeline/install.py

@@ -98,7 +98,9 @@ def convert_map(archive,work,maps,stage,game_exe,log,report):
     manifest_path=prepare(stream_directory=stream,output_root=district_work/'intermediate',
         utt_root=TOOLS/'vendor/utt',district_name=district,map_name=label,
         package_name='Skate 3 owned disc',cache_format='skate3-rust-map-v1',
-        texture_stream_names=('Tex',),excluded_normal_texture_ids=EXCLUDED_NORMAL_TEXTURE_IDS)
+        # Smaller parks keep their textures in Pres rather than a Tex stream.
+        texture_stream_names=('Tex',) if any(stream.glob('cTex_*.xsf')) else (),
+        excluded_normal_texture_ids=EXCLUDED_NORMAL_TEXTURE_IDS)
     collision=district_work/'collision.rwcmset'
     build_archive(manifest_path,collision)
     final=maps/(label+'.skate')

tools/vendor/university/tools/vanilla_map_extraction/tools/retail_grind_splines.py

@@ -168,8 +168,11 @@ def decode_grind_splines(data: bytes) -> list[dict[str, object]]:
         ):
             raise ValueError("RX2 spline section extends beyond the file")
 
-        rail_count, segment_count, rail_table, segment_table = (
-            struct.unpack_from(">4I", data, section_offset)
+        # TU3 GrindData::Add (82C1EEF0) reads lhz +2, including its loop
+        # bound at 82C1EFBC. The first halfword is not part of the count:
+        # Skate School has header 0001 0002, two rails, table end 0x50.
+        header_halfword, rail_count, segment_count, rail_table, segment_table = (
+            struct.unpack_from(">HH3I", data, section_offset)
         )
         expected_segment_table = (
             SPLINE_HEADER_SIZE + rail_count * SPLINE_RAIL_SIZE
@@ -271,6 +274,7 @@ def decode_grind_splines(data: bytes) -> list[dict[str, object]]:
                 {
                     "section_index": record_index,
                     "section_offset": section_offset,
+                    "section_header_halfword": header_halfword,
                     "rail_index": rail_index,
                     "spline_id": f"0x{spline_id:016X}",
                     "type_signature": f"0x{type_signature:016X}",