1 files changed, 88 insertions, 0 deletions

diff --git a/src/r_demo.c b/src/r_demo.c
new file mode 100644
index 0000000..0f9e6f1
--- /dev/null
+++ b/src/r_demo.c
@@ -0,0 +1,88 @@
+/* Emacs style mode select   -*- C++ -*-
+ *-----------------------------------------------------------------------------
+ *
+ *
+ *  PrBoom: a Doom port merged with LxDoom and LSDLDoom
+ *  based on BOOM, a modified and improved DOOM engine
+ *  Copyright (C) 1999 by
+ *  id Software, Chi Hoang, Lee Killough, Jim Flynn, Rand Phares, Ty Halderman
+ *  Copyright (C) 1999-2000 by
+ *  Jess Haas, Nicolas Kalkhof, Colin Phipps, Florian Schulze, Andrey Budko
+ *  Copyright 2005, 2006 by
+ *  Florian Schulze, Colin Phipps, Neil Stevens, Andrey Budko
+ *
+ *  This program is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU General Public License
+ *  as published by the Free Software Foundation; either version 2
+ *  of the License, or (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ *  02111-1307, USA.
+ *
+ * DESCRIPTION:
+ *      Demo stuff
+ *
+ *---------------------------------------------------------------------
+ */
+
+#include "doomstat.h"
+#include "r_demo.h"
+#include "r_fps.h"
+
+int demo_smoothturns = false;
+int demo_smoothturnsfactor = 6;
+
+static int smooth_playing_turns[SMOOTH_PLAYING_MAXFACTOR];
+static int_64_t smooth_playing_sum;
+static int smooth_playing_index;
+static angle_t smooth_playing_angle;
+
+void R_SmoothPlaying_Reset(player_t *player)
+{
+  if (demo_smoothturns && demoplayback && players)
+  {
+    if (!player)
+      player = &players[displayplayer];
+
+    if (player==&players[displayplayer])
+    {
+      smooth_playing_angle = players[displayplayer].mo->angle;
+      memset(smooth_playing_turns, 0, sizeof(smooth_playing_turns[0]) * SMOOTH_PLAYING_MAXFACTOR);
+      smooth_playing_sum = 0;
+      smooth_playing_index = 0;
+    }
+  }
+}
+
+void R_SmoothPlaying_Add(int delta)
+{
+  if (demo_smoothturns && demoplayback)
+  {
+    smooth_playing_sum -= smooth_playing_turns[smooth_playing_index];
+    smooth_playing_turns[smooth_playing_index] = delta;
+    smooth_playing_index = (smooth_playing_index + 1)%(demo_smoothturnsfactor);
+    smooth_playing_sum += delta;
+    smooth_playing_angle += (int)(smooth_playing_sum/(demo_smoothturnsfactor));
+  }
+}
+
+angle_t R_SmoothPlaying_Get(angle_t defangle)
+{
+  if (demo_smoothturns && demoplayback)
+    return smooth_playing_angle;
+  else
+    return defangle;
+}
+
+void R_ResetAfterTeleport(player_t *player)
+{
+  R_ResetViewInterpolation();
+  R_SmoothPlaying_Reset(player);
+}