- Duke: Implement `WeaponSel_Alt` for Duke and RR.

source/games/duke/src/player_d.cpp

@@ -1109,7 +1109,18 @@ void selectweapon_d(int snum, int weap) // playernum, weaponnum
 		{
 			if (weap == WeaponSel_Alt)
 			{
-				// todo
+				switch (p->curr_weapon)
+				{
+					case SHRINKER_WEAPON:
+						j = PLUTOPAK ? GROW_WEAPON : p->curr_weapon;
+						break;
+					case GROW_WEAPON:
+						j = SHRINKER_WEAPON;
+						break;
+					default:
+						j = p->curr_weapon;
+						break;
+				}
 			}
 			else if (weap == WeaponSel_Next || weap == WeaponSel_Prev)
 			{

source/games/duke/src/player_r.cpp

@@ -957,7 +957,36 @@ void selectweapon_r(int snum, int weap)
 		{
 			if (weap == WeaponSel_Alt)
 			{
-				// todo
+				switch (p->curr_weapon)
+				{
+					case THROWSAW_WEAPON:
+						j = BUZZSAW_WEAPON;
+						break;
+					case BUZZSAW_WEAPON:
+						j = THROWSAW_WEAPON;
+						break;
+					case POWDERKEG_WEAPON:
+						j = BOWLING_WEAPON;
+						break;
+					case BOWLING_WEAPON:
+						j = POWDERKEG_WEAPON;
+						break;
+					case KNEE_WEAPON:
+						j = isRRRA() ? SLINGBLADE_WEAPON : p->curr_weapon;
+						break;
+					case SLINGBLADE_WEAPON:
+						j = KNEE_WEAPON;
+						break;
+					case DYNAMITE_WEAPON:
+						j = isRRRA() ? CHICKEN_WEAPON : p->curr_weapon;
+						break;
+					case CHICKEN_WEAPON:
+						j = DYNAMITE_WEAPON;
+						break;
+					default:
+						j = p->curr_weapon;
+						break;
+				}
 			}
 			else if (weap == WeaponSel_Next || weap == WeaponSel_Prev)
 			{

wadsrc/static/engine/menudef.txt

@@ -481,9 +481,9 @@ OptionMenu "ActionControlsMenu"// protected
 	{
 		Control    "$CNTRLMNU_ALTATTACK"        , "+alt_fire"
 	}
-	ifgame(ShadowWarrior)
+	ifgame(ShadowWarrior, Duke, Redneck)
 	{
-		Control    "$CNTRLMNU_ALTWEAPON"        , "+alt_weapon"
+		Control    "$CNTRLMNU_ALTWEAPON"        , "weapalt"
 	}
 
 	StaticText ""