Remove kart offroad variable and workings.

We can set a standard for friction sectors in maps and people can then do what they want with it.
Also caused problems with Ice and FOFs above friction sectors.

src/d_player.h

@@ -261,7 +261,6 @@ typedef enum
 	k_boostcharge,		// Charge-up for boosting at the start of the race, or when Lakitu drops you
 	k_jmp,				// In Mario Kart, letting go of the jump button stops the drift
 	k_lakitu,			// > 0 = Lakitu fishing, < 0 = Lakitu lap counter (was "player->airtime") // NOTE: Check for ->lakitu, replace with this
-	k_offroad,			// In Super Mario Kart, going offroad has lee-way of about 1 second before you start losing speed
 
 	k_itemroulette,		// Used for the roulette when deciding what item to give you (was "pw_kartitem")
 	k_itemclose,		// Used to animate the item window closing (was "pw_psychic")

src/g_game.c

@@ -2190,7 +2190,6 @@ void G_PlayerReborn(INT32 player)
 	INT32 playerahead;
 	INT32 starpostwp;
 	INT32 lakitu;
-	INT32 offroad;
 
 	score = players[player].score;
 	lives = players[player].lives;
@@ -2247,7 +2246,6 @@ void G_PlayerReborn(INT32 player)
 	playerahead = players[player].kartstuff[k_playerahead];
 	starpostwp = players[player].kartstuff[k_starpostwp];
 	lakitu = players[player].kartstuff[k_lakitu];
-	offroad = players[player].kartstuff[k_offroad];
 
 	p = &players[player];
 	memset(p, 0, sizeof (*p));
@@ -2305,7 +2303,6 @@ void G_PlayerReborn(INT32 player)
 	p->kartstuff[k_playerahead] = playerahead;
 	p->kartstuff[k_starpostwp] = starpostwp;
 	p->kartstuff[k_lakitu] = lakitu;
-	p->kartstuff[k_offroad] = offroad;
 
 	// Don't do anything immediately
 	p->pflags |= PF_USEDOWN;

src/k_kart.c

@@ -872,49 +872,6 @@ static void K_KartItemRoulette(player_t *player, ticcmd_t *cmd)
 		S_StartSound(NULL, sfx_mkitmF);
 }
 
-//}
-
-//{ SRB2kart p_user.c Stuff
-
-/**	\brief	Updates the Player's offroad value once per frame
-
-	\param	player	player object passed from K_KartPlayerThink
-
-	\return	void
-*/
-static void K_UpdateOffroad(player_t *player)
-{
-	fixed_t kartweight = player->kartweight;
-	fixed_t offroad;
-	sector_t *nextsector = R_PointInSubsector(
-		player->mo->x + player->mo->momx*2, player->mo->y + player->mo->momy*2)->sector;
-
-	// If you are offroad, a timer starts. Depending on your weight value, the timer increments differently.
-	if ((nextsector->special & 256) && nextsector->special != 768 && nextsector->special != 1024 && nextsector->special != 4864)
-	{
-		if (P_IsObjectOnGround(player->mo) && player->kartstuff[k_offroad] == 0)
-			player->kartstuff[k_offroad] = 16;
-		if (player->kartstuff[k_offroad] > 0)
-		{
-			if (kartweight < 1) { kartweight = 1; } if (kartweight > 9) { kartweight = 9; } // Safety Net
-
-			// 1872 is the magic number - 35 frames adds up to approximately 65536. 1872/4 = 468/3 = 156
-			// A higher kart weight means you can stay offroad for longer without losing speed
-			offroad = (1872 + 5*156 - kartweight*156);
-
-			if (player->kartstuff[k_growshrinktimer] > 1) // megashroom slows down half as fast
-				offroad /= 2;
-
-			player->kartstuff[k_offroad] += offroad;
-		}
-
-		if (player->kartstuff[k_offroad] > FRACUNIT)
-			player->kartstuff[k_offroad] = FRACUNIT;
-	}
-	else
-		player->kartstuff[k_offroad] = 0;
-}
-
 /**	\brief	Decreases various kart timers and powers per frame. Called in P_PlayerThink in p_user.c
 
 	\param	player	player object passed from P_PlayerThink
@@ -924,8 +881,6 @@ static void K_UpdateOffroad(player_t *player)
 */
 void K_KartPlayerThink(player_t *player, ticcmd_t *cmd)
 {
-	K_UpdateOffroad(player);
-
 	// This spawns the drift sparks when k_driftcharge hits 26 + player->kartspeed. Its own AI handles life/death and color
 	if ((player->kartstuff[k_drift] >= 1 || player->kartstuff[k_drift] <= -1)
 		&& player->kartstuff[k_driftcharge] == (26 + player->kartspeed))
@@ -1056,11 +1011,6 @@ static fixed_t K_GetKartBoostPower(player_t *player, boolean speedonly)
 	fixed_t boostvalue = 0;
 	fixed_t numboosts = 0;
 
-	// Offroad is separate, it's difficult to factor it in with a variable value anyway.
-	if (!(player->kartstuff[k_startimer] || player->kartstuff[k_bootaketimer] || player->kartstuff[k_mushroomtimer])
-		&& player->kartstuff[k_offroad] >= 0 && speedonly)
-			boostpower = FixedDiv(boostpower, player->kartstuff[k_offroad] + FRACUNIT);
-
 	if (player->kartstuff[k_growshrinktimer] < -1 && speedonly)
 	{												// Shrink
 		boostvalue += 16; // This is basically speed x2 due to friction and being smaller. Really translates to about 80%.