Added support for Dance Magic/Battle on Techno Motion 8-panel. Kind of hacky, but perhaps it will inspire others.

stepmania/src/ArrowEffects.cpp

@@ -421,7 +421,9 @@ float ArrowGetZoom( PlayerNumber pn )
 {
 	/* Hack: make STYLE_TECHNO_VERSUS8 fit. */
 	if( GAMESTATE->m_CurGame == GAME_TECHNO &&
-		GAMESTATE->m_CurStyle == STYLE_TECHNO_VERSUS8 )
+		( GAMESTATE->m_CurStyle == STYLE_TECHNO_VERSUS8 
+		|| GAMESTATE->m_PlayMode == PLAY_MODE_BATTLE 
+		|| GAMESTATE->m_PlayMode == PLAY_MODE_RAVE ) )
 		return 0.6f;
 	return 1.0f;
 }

stepmania/src/GameState.cpp

@@ -780,6 +780,13 @@ GameDef* GameState::GetCurrentGameDef()
 const StyleDef* GameState::GetCurrentStyleDef() const
 {
 	ASSERT( m_CurStyle != STYLE_INVALID );	// the style must be set before calling this
+
+	// HACK: if we're in TM doing PLAY_MODE_BATTLE or PLAY_MODE_RAVE,
+	// pretend that we're doing STYLE_TECHNO_VERSUS8 instead.
+	if( m_CurGame == GAME_TECHNO &&
+		( m_PlayMode == PLAY_MODE_BATTLE || m_PlayMode == PLAY_MODE_RAVE ) )
+		return GAMEMAN->GetStyleDefForStyle( STYLE_TECHNO_VERSUS8 );
+
 	return GAMEMAN->GetStyleDefForStyle( m_CurStyle );
 }
 

stepmania/src/ModeChoice.cpp

@@ -268,7 +268,8 @@ static bool AreStyleAndPlayModeCompatible( Style style, PlayMode pm )
 		// Can't play rave if there isn't enough room for two players.
 		// This is correct for dance (ie, no rave for solo and doubles),
 		// and should be okay for pump .. not sure about other game types.
-		if( GAMEMAN->GetStyleDefForStyle(style)->m_iColsPerPlayer >= 6 )
+		// Techno Motion scales down versus arrows, though, so allow this.
+		if( GAMEMAN->GetStyleDefForStyle(style)->m_iColsPerPlayer >= 6 && GAMESTATE->m_CurGame != GAME_TECHNO )
 			return false;
 		
 		/* Don't allow battle modes if the style takes both sides. */
@@ -407,6 +408,7 @@ void ModeChoice::Apply( PlayerNumber pn ) const
 		GAMESTATE->m_CurGame = m_game;
 	if( m_pm != PLAY_MODE_INVALID )
 		GAMESTATE->m_PlayMode = m_pm;
+
 	if( m_style != STYLE_INVALID )
 	{
 		GAMESTATE->m_CurStyle = m_style;
@@ -479,7 +481,6 @@ void ModeChoice::Apply( PlayerNumber pn ) const
 	{
 		GAMESTATE->PlayersFinalized();
 	}
-	
 }
 
 bool ModeChoice::IsZero() const