game: Add third person view

Based on codes:
 * Lazarus mod
 * KMQuake2 codes
 * Slight Mechanical Destruction mod

https://bitbucket.org/Knightmare66/kmquake2_stable/src/master/game/p_chase.c

Makefile

@@ -926,6 +926,7 @@ GAME_OBJS_ = \
 	src/game/monster/turret/turret.o \
 	src/game/monster/widow/widow2.o \
 	src/game/monster/widow/widow.o \
+	src/game/player/chase.o \
 	src/game/player/client.o \
 	src/game/player/hud.o \
 	src/game/player/trail.o \

doc/050_commands.md

@@ -46,3 +46,5 @@ original clients (Vanilla Quake II) commands are still in place.
 * **set** / **seta** / **setu** / **sets**: set cvar valu with different flags.
 
 * **listlights**: Show lights style and dlights list.
+
+* **thirdperson**: Third person view.

src/client/cl_main.c

@@ -628,6 +628,7 @@ CL_InitLocal(void)
 	Cmd_AddCommand("spawnentity", NULL);
 	Cmd_AddCommand("spawnonstart", NULL);
 	Cmd_AddCommand("cycleweap", NULL);
+	Cmd_AddCommand("thirdperson", NULL);
 }
 
 /*

src/game/g_cmds.c

@@ -2255,6 +2255,10 @@ ClientCommand(edict_t *ent)
 	{
 		CTFObserver(ent);
 	}
+	else if (Q_stricmp(cmd, "thirdperson") == 0)
+	{
+		Cmd_Chasecam_Toggle(ent);
+	}
 	else /* anything that doesn't match a command will be a chat */
 	{
 		Cmd_Say_f(ent, false, true);

src/game/g_phys.c

@@ -1072,20 +1072,24 @@ SV_Physics_Toss(edict_t *ent)
 		ent->waterlevel = 0;
 	}
 
-	if (!wasinwater && isinwater)
+	/* Don't do the sounds for the camera */
+	if (Q_stricmp(ent->classname,"chasecam"))
 	{
-		/* don't play splash sound for entities already in water on level start */
-		if (level.framenum > 3)
+		if (!wasinwater && isinwater)
+		{
+			/* don't play splash sound for entities already in water on level start */
+			if (level.framenum > 3)
+			{
+				gi.positioned_sound(old_origin, g_edicts, CHAN_AUTO,
+						gi.soundindex("misc/h2ohit1.wav"), 1, 1, 0);
+			}
+		}
+		else if (wasinwater && !isinwater)
 		{
-			gi.positioned_sound(old_origin, g_edicts, CHAN_AUTO,
+			gi.positioned_sound(ent->s.origin, g_edicts, CHAN_AUTO,
 					gi.soundindex("misc/h2ohit1.wav"), 1, 1, 0);
 		}
 	}
-	else if (wasinwater && !isinwater)
-	{
-		gi.positioned_sound(ent->s.origin, g_edicts, CHAN_AUTO,
-				gi.soundindex("misc/h2ohit1.wav"), 1, 1, 0);
-	}
 
 	/* move teamslaves */
 	for (slave = ent->teamchain; slave; slave = slave->teamchain)

src/game/header/local.h

@@ -1143,6 +1143,7 @@ typedef struct
 	int helpchanged;
 
 	qboolean spectator;         /* client is a spectator */
+	int chasetoggle;       /* Chasetoggle */
 
 	int max_tesla;
 	int max_prox;
@@ -1292,6 +1293,14 @@ struct gclient_s
 	float tracker_pain_framenum;
 
 	edict_t *owned_sphere;          /* this points to the player's sphere */
+
+	/* Third person view */
+	int chasetoggle;
+	edict_t *chasecam;
+	edict_t *oldplayer;
+	int use;
+	int zoom;
+	int delayedstart;
 };
 
 struct edict_s
@@ -1452,6 +1461,10 @@ struct edict_s
 	edict_t *target_hint_chain;
 	int hint_chain_id;
 	float lastMoveTime;
+
+	/* Third person view */
+	int chasedist1;
+	int chasedist2;
 };
 
 #define SPHERE_DEFENDER 0x0001
@@ -1596,6 +1609,7 @@ typedef struct ghost_s
 } ghost_t;
 
 extern cvar_t *ctf;
+extern char *ctf_statusbar;
 
 #define CTF_TEAM1_SKIN "ctf_r"
 #define CTF_TEAM2_SKIN "ctf_b"
@@ -1702,11 +1716,11 @@ qboolean CTFCheckRules(void);
 void SP_misc_ctf_banner(edict_t *ent);
 void SP_misc_ctf_small_banner(edict_t *ent);
 
-extern char *ctf_statusbar;
-
-void UpdateChaseCam(edict_t *ent);
-void ChaseNext(edict_t *ent);
-void ChasePrev(edict_t *ent);
+void Cmd_Chasecam_Toggle(edict_t *ent);
+void ChasecamStart(edict_t *ent);
+void ChasecamRemove(edict_t *ent);
+void CheckChasecam_Viewent(edict_t *ent);
+void ChasecamTrack(edict_t *ent);
 
 void CTFObserver(edict_t *ent);