P_ForceLocalAngle: reset ticcmd angles and localsteering

For Sealed Stars, restarting the level after turning away
from the spawn angle. This would slightly skew your
momentum when spawning.

src/d_clisrv.c

@@ -561,6 +561,16 @@ void D_ResetTiccmds(void)
 			D_Clearticcmd(textcmds[i]->tic);
 }
 
+void D_ResetTiccmdAngle(UINT8 ss, angle_t angle)
+{
+	INT32 i;
+
+	for (i = 0; i < MAXGENTLEMENDELAY; ++i)
+	{
+		localcmds[ss][i].angle = angle >> TICCMD_REDUCE;
+	}
+}
+
 ticcmd_t *D_LocalTiccmd(UINT8 ss)
 {
 	return &localcmds[ss][0];

src/d_clisrv.h

@@ -617,6 +617,7 @@ INT32 D_NumPlayers(void);
 boolean D_IsPlayerHumanAndGaming(INT32 player_number);
 
 void D_ResetTiccmds(void);
+void D_ResetTiccmdAngle(UINT8 ss, angle_t angle);
 ticcmd_t *D_LocalTiccmd(UINT8 ss);
 
 tic_t GetLag(INT32 node);

src/p_user.c

@@ -4689,6 +4689,22 @@ void P_ForceLocalAngle(player_t *player, angle_t angle)
 			break;
 		}
 	}
+
+	// jartha: OK, I don't really know how ticcmds work. The
+	// specific problem I'm trying to fix is that, on level
+	// load, the player angle gets reset. But the ticcmds
+	// copied in afterward don't match this angle, and they
+	// influence the player steering.
+	for (i = 0; i <= splitscreen; i++)
+	{
+		if (player == &players[g_localplayers[i]])
+		{
+			D_ResetTiccmdAngle(i, angle);
+			localsteering[i] = angle;
+
+			break;
+		}
+	}
 }
 
 boolean P_PlayerFullbright(player_t *player)