add StyleDef::NumSidesJoinedToPlay

stepmania/src/StyleDef.cpp

@@ -99,3 +99,19 @@ void StyleDef::GetMinAndMaxColX( PlayerNumber pn, float& fMixXOut, float& fMaxXO
 		fMaxXOut = max( fMaxXOut, m_ColumnInfo[pn][i].fXOffset );
 	}
 }
+
+int StyleDef::NumSidesJoinedToPlay() const
+{
+	switch( m_StyleType )
+	{
+	case StyleDef::ONE_PLAYER_ONE_CREDIT:
+		return 1;
+	case StyleDef::TWO_PLAYERS_TWO_CREDITS:
+	case StyleDef::ONE_PLAYER_TWO_CREDITS:
+		return 2;
+	default:
+		ASSERT(0);
+		return 1;
+	}
+}
+

stepmania/src/StyleDef.h

@@ -78,6 +78,8 @@ public:
 	bool MatchesNotesType( StepsType type ) const;
 
 	void GetMinAndMaxColX( PlayerNumber pn, float& fMixXOut, float& fMaxXOut ) const;
+
+	int NumSidesJoinedToPlay() const;
 };