Properly calculate radars for Couple charts.

This does force another cache update.

Docs/Changelog_sm5.txt

@@ -12,6 +12,7 @@ StepMania 5.0 ????????? | 20110???
 ----------
 * [Difficulty] Allow ALL StepsTypes to use CustomDifficulty properly.
   There was some unfair targeting of Couple and Routine. [Wolfman2000]
+* [Steps] Calculate accurate radar values for Couple charts. [Wolfman2000]
 
 2011/07/12
 ----------

Songs/StepMania 5/MechaTribe Assault/Mecha-Tribe Assault.ssc

@@ -7022,7 +7022,7 @@ M0000
 #CHARTSTYLE:Pad;
 #DIFFICULTY:Easy;
 #METER:3;
-#RADARVALUES:0.506,0.724,1.000,0.838,0.000,147.000,117.000,88.000,0.000,48.000,0.000,0.000,0.000,0.506,0.724,1.000,0.838,0.000,147.000,117.000,88.000,0.000,48.000,0.000,0.000,0.000;
+#RADARVALUES:0.253,0.362,0.095,0.419,0.000,132.000,10.000,44.000,0.000,0.000,0.000,0.000,0.000,0.253,0.362,0.095,0.419,0.000,132.000,10.000,44.000,0.000,0.000,0.000,0.000,0.000;
 #CREDIT:Jason Felds;
 #OFFSET:-0.028000;
 #BPMS:0.000000=180.000000

src/Song.cpp

@@ -41,7 +41,7 @@
  * @brief The internal version of the cache for StepMania.
  *
  * Increment this value to invalidate the current cache. */
-const int FILE_CACHE_VERSION = 190;
+const int FILE_CACHE_VERSION = 191;
 
 /** @brief How long does a song sample last by default? */
 const float DEFAULT_MUSIC_SAMPLE_LENGTH = 12.f;

src/Steps.cpp

@@ -225,6 +225,22 @@ void Steps::CalculateRadarValues( float fMusicLengthSeconds )
 		for( size_t pn = 0; pn < min(vParts.size(), size_t(NUM_PLAYERS)); ++pn )
 			NoteDataUtil::CalculateRadarValues( vParts[pn], fMusicLengthSeconds, m_CachedRadarValues[pn] );
 	}
+	else if (GAMEMAN->GetStepsTypeInfo(this->m_StepsType).m_StepsTypeCategory == StepsTypeCategory_Couple)
+	{
+		NoteData p1 = tempNoteData;
+		// XXX: Assumption that couple will always have an even number of notes.
+		const int tracks = tempNoteData.GetNumTracks() / 2;
+		p1.SetNumTracks(tracks);
+		NoteDataUtil::CalculateRadarValues(p1,
+										   fMusicLengthSeconds,
+										   m_CachedRadarValues[PLAYER_1]);
+		// at this point, p2 is tempNoteData.
+		NoteDataUtil::ShiftTracks(tempNoteData, tracks);
+		tempNoteData.SetNumTracks(tracks);
+		NoteDataUtil::CalculateRadarValues(tempNoteData,
+										   fMusicLengthSeconds,
+										   m_CachedRadarValues[PLAYER_2]);
+	}
 	else
 	{
 		NoteDataUtil::CalculateRadarValues( tempNoteData, fMusicLengthSeconds, m_CachedRadarValues[0] );