Adding Quick-Reverse Key and Mouse for Hexen and Heretic

Adding Quick-Reverse Key and Mouse Input for Hexen and Heretic by copying the implementation from Doom.

Author: Noseey

src/heretic/g_game.c

@@ -463,6 +463,14 @@ void G_BuildTiccmd(ticcmd_t *cmd, int maketic)
         lspeed = 2;
     }
 
+    // [crispy] add quick 180° reverse
+    if (gamekeydown[key_reverse] || mousebuttons[mousebreverse])
+    {
+        angle += ANG180 >> FRACBITS;
+        gamekeydown[key_reverse] = false;
+        mousebuttons[mousebreverse] = false;
+    }
+
     // [crispy] toggle "always run"
     if (gamekeydown[key_toggleautorun])
     {

src/hexen/g_game.c

@@ -361,6 +361,14 @@ void G_BuildTiccmd(ticcmd_t *cmd, int maketic)
         lspeed = 2;             // 5;
     }
 
+    // [crispy] add quick 180° reverse
+    if (gamekeydown[key_reverse] || mousebuttons[mousebreverse])
+    {
+        angle += ANG180 >> FRACBITS;
+        gamekeydown[key_reverse] = false;
+        mousebuttons[mousebreverse] = false;
+    }
+
     // [crispy] toggle "always run"
     if (gamekeydown[key_toggleautorun])
     {

src/m_config.c

@@ -508,7 +508,7 @@ static default_t	doom_defaults_list[] =
     CONFIG_VARIABLE_INT(mouseb_mouselook),
 
     //!
-    // @game doom
+    // @game doom heretic hexen
     //
     // Quick 180° reverse.
     //
@@ -2251,7 +2251,7 @@ static default_t extra_defaults_list[] =
     CONFIG_VARIABLE_KEY(key_multi_msgplayer8),
 
     //!
-    // @game doom
+    // @game doom heretic hexen
     // Quick 180° reverse.
     //
 

src/setup/keyboard.c

@@ -246,6 +246,7 @@ static void ConfigExtraKeys(TXT_UNCAST_ARG(widget), TXT_UNCAST_ARG(unused))
         AddKeyControl(table, "Strafe Right (alt.)", &key_alt_straferight);
         AddKeyControl(table, "Toggle always run", &key_toggleautorun);
         AddKeyControl(table, "Toggle vert. mouse", &key_togglenovert);
+        AddKeyControl(table, "Quick Reverse", &key_reverse);
         }
 
         if (gamemission == heretic || gamemission == hexen)

src/setup/mouse.c

@@ -160,6 +160,7 @@ static void ConfigExtraButtons(TXT_UNCAST_ARG(widget), TXT_UNCAST_ARG(unused))
 
     if (gamemission == heretic || gamemission == hexen)
     {
+      AddMouseControl(buttons_table, "Quick Reverse", &mousebreverse);
       AddMouseControl(buttons_table, "Mouselook", &mousebmouselook);
       AddMouseControl(buttons_table, "Inventory left", &mousebinvleft);
       AddMouseControl(buttons_table, "Inventory right", &mousebinvright);