Properly set timing window values for easier difficulties (#74)

src/tja2fumen/classes.py

@@ -9,7 +9,7 @@
 
 from dataclasses import dataclass, field, fields
 
-from tja2fumen.constants import BRANCH_NAMES
+from tja2fumen.constants import BRANCH_NAMES, TIMING_WINDOWS
 
 
 @dataclass()
@@ -224,7 +224,7 @@ def set_branch_info(self,
 class FumenHeader:
     """Contains all the byte values for a Fumen chart file's header."""
     order: str = "<"
-    b000_b431_timing_windows: Tuple[float, ...] = (25.025, 75.075, 108.422)*36
+    b000_b431_timing_windows: Tuple[float, ...] = (0.0, 0.0, 0.0)*36
     b432_b435_has_branches:                 int = 0
     b436_b439_hp_max:                       int = 10000
     b440_b443_hp_clear:                     int = 8000
@@ -292,6 +292,12 @@ def _parse_order(self, raw_bytes: bytes) -> None:
         else:
             self.order = "<"
 
+    def set_timing_windows(self, difficulty: str) -> None:
+        """Set the timing window header bytes depending on the difficulty."""
+        # Note: Ura Oni is equivalent to Oni for timing window behavior
+        difficulty = 'Oni' if difficulty in ['Ura', 'Edit'] else difficulty
+        self.b000_b431_timing_windows = TIMING_WINDOWS[difficulty]*36
+
     def set_hp_bytes(self, n_notes: int, difficulty: str, stars: int) -> None:
         """Compute header bytes related to the soul gauge (HP) behavior."""
         # Note: Ura Oni is equivalent to Oni for soul gauge behavior

src/tja2fumen/constants.py

@@ -94,3 +94,11 @@
     'Oni': 'm',
     'Ura': 'x',
 }
+
+TIMING_WINDOWS = {
+    #            "GOOD" timing      "OK" timing       "BAD" timing
+    'Easy':   (041.7083358764648, 108.441665649414, 125.125000000000),
+    'Normal': (041.7083358764648, 108.441665649414, 125.125000000000),
+    'Hard':   (025.0250015258789, 075.075004577637, 108.441665649414),
+    'Oni':    (025.0250015258789, 075.075004577637, 108.441665649414)
+}

src/tja2fumen/converters.py

@@ -377,6 +377,8 @@ def convert_tja_to_fumen(tja: TJACourse) -> FumenCourse:
 
     # Compute the header bytes that dictate the soul gauge bar behavior
     fumen.header.set_hp_bytes(total_notes['normal'], tja.course, tja.level)
+    # Compute the timing windows based on the course
+    fumen.header.set_timing_windows(tja.course)
 
     # If song has only drumroll branching conditions (also allowing percentage
     # conditions that force a level up/level down), then set the header bytes

testing/test_conversion.py

@@ -79,7 +79,8 @@ def test_converted_tja_vs_cached_fumen(id_song, tmp_path, entry_point):
         # cannot be expressed in a TJA file. So, we skip checking the
         # `branch_point` header values for KAGEKIYO.
         if id_song != 'genpe':
-            for header_property in ['b468_b471_branch_pts_good',
+            for header_property in ['b000_b431_timing_windows',
+                                    'b468_b471_branch_pts_good',
                                     'b472_b475_branch_pts_ok',
                                     'b476_b479_branch_pts_bad',
                                     'b480_b483_branch_pts_drumroll',