add positioning mode selection

stepmania/src/PlayerOptions.cpp

@@ -14,6 +14,8 @@
 #include "RageUtil.h"
 #include "math.h"
 
+#include "GameState.h"
+#include "NoteFieldPositioning.h"
 
 void PlayerOptions::Init()
 {
@@ -125,6 +127,7 @@ CString PlayerOptions::GetString()
 	if( !m_bHoldNotes )		sReturn += "NoHolds, ";
 	if( m_bTimingAssist )	sReturn += "TimingAssist, ";
 
+	if( m_sPositioning != "" )	sReturn += m_sPositioning + ", ";
 	switch( (int)m_fPerspectiveTilt )
 	{
 	case -1:	sReturn += "Incoming, ";	break;
@@ -195,6 +198,8 @@ void PlayerOptions::FromString( CString sOptions )
 		else if( sBit == "timingassist")m_bTimingAssist = true;
 		else if( sBit == "incoming" )	m_fPerspectiveTilt = -1;
 		else if( sBit == "space" )		m_fPerspectiveTilt = +1;
+		else if( GAMESTATE->m_Position->IsValidModeForCurrentGame(sBit) )
+				m_sPositioning = sBit;
 	}
 }