SW: Interpolate sector objects in non-demo, single player games.

Let's see if this is breaking anything.

source/sw/src/draw.cpp

@@ -2013,7 +2013,7 @@ drawscreen(PLAYERp pp)
     tx = camerapp->oposx + mulscale16(camerapp->posx - camerapp->oposx, smoothratio);
     ty = camerapp->oposy + mulscale16(camerapp->posy - camerapp->oposy, smoothratio);
     tz = camerapp->oposz + mulscale16(camerapp->posz - camerapp->oposz, smoothratio);
-    if (PedanticMode ||
+    if (PedanticMode || pp->sop_control ||
         pp == Player+myconnectindex && TEST(pp->Flags, PF_DEAD))
     {
         tq16ang = camerapp->oq16ang + mulscale16(((camerapp->q16ang + fix16_from_int(1024) - camerapp->oq16ang) & 0x7FFFFFF) - fix16_from_int(1024), smoothratio);
@@ -2056,7 +2056,7 @@ drawscreen(PLAYERp pp)
 
     if (pp->sop_riding || pp->sop_control)
     {
-        if (pp->sop_control)
+        if (pp->sop_control && !InterpolateSectObj)
         {
             tx = pp->posx;
             ty = pp->posy;

source/sw/src/game.cpp

@@ -187,6 +187,7 @@ SWBOOL NoDemoStartup = FALSE;
 SWBOOL FirstTimeIntoGame;
 
 SWBOOL PedanticMode;
+SWBOOL InterpolateSectObj;
 
 SWBOOL BorderAdjust = FALSE;
 SWBOOL LocationInfo = 0;
@@ -958,6 +959,7 @@ void InitLevelGlobals(void)
     memset(BossSpriteNum,-1,sizeof(BossSpriteNum));
 
     PedanticMode = (DemoPlaying || DemoRecording || DemoEdit || DemoMode);
+    InterpolateSectObj = !CommEnabled && !PedanticMode;
 }
 
 void InitLevelGlobals2(void)

source/sw/src/game.h

@@ -886,6 +886,7 @@ extern int PlayerYellVocs[MAX_YELLSOUNDS];
 void BossHealthMeter(void);
 
 extern SWBOOL PedanticMode;
+extern SWBOOL InterpolateSectObj;
 
 // Global variables used for modifying variouse things from the Console
 

source/sw/src/interp.cpp

@@ -111,4 +111,13 @@ void restoreinterpolations(void)                 // Stick at end of drawscreen
     for (i = numinterpolations - 1; i >= 0; i--)
         *curipos[i] = bakipos[i];
 }
+
+void togglespriteinterpolation(spritetype *sp, int set)
+{
+    auto func = set ? setinterpolation : stopinterpolation;
+    func(&sp->x);
+    func(&sp->y);
+    func(&sp->z);
+}
+
 END_SW_NS

source/sw/src/interp.h

@@ -49,6 +49,11 @@ void updateinterpolations(void);
 void dointerpolations(int smoothratio);
 void restoreinterpolations(void);
 
+void togglespriteinterpolation(spritetype *sp, int set);
+
+static void FORCE_INLINE setspriteinterpolation(spritetype *sp) { togglespriteinterpolation(sp, 1); }
+static void FORCE_INLINE stopspriteinterpolation(spritetype *sp) { togglespriteinterpolation(sp, 0); }
+
 #endif
 
 END_SW_NS

source/sw/src/track.cpp

@@ -34,6 +34,7 @@ Prepared for public release: 03/28/2005 - Charlie Wiederhold, 3D Realms
 #include "ai.h"
 #include "player.h"
 #include "game.h"
+#include "interp.h"
 #include "network.h"
 #include "sprite.h"
 #include "track.h"
@@ -848,6 +849,7 @@ SectorObjectSetupBounds(SECTOR_OBJECTp sop)
 
     //
     // Make sure every sector object has an outer loop tagged - important
+    // Further setup interpolation
     //
 
     FoundOutsideLoop = FALSE;
@@ -860,6 +862,21 @@ SectorObjectSetupBounds(SECTOR_OBJECTp sop)
         // move all walls in sectors
         for (k = startwall; k <= endwall; k++)
         {
+            uint16_t const nextwall = wall[k].nextwall;
+
+            // setup interpolation
+            if (InterpolateSectObj)
+            {
+                setinterpolation(&wall[k].x);
+                setinterpolation(&wall[k].y);
+
+                if (nextwall < MAXWALLS)
+                {
+                    setinterpolation(&wall[wall[nextwall].point2].x);
+                    setinterpolation(&wall[wall[nextwall].point2].y);
+                }
+            }
+
             // for morph point - tornado style
             if (wall[k].lotag == TAG_WALL_ALIGN_SLOPE_TO_POINT)
                 sop->morph_wall_point = k;
@@ -869,10 +886,16 @@ SectorObjectSetupBounds(SECTOR_OBJECTp sop)
 
             // each wall has this set - for collision detection
             SET(wall[k].extra, WALLFX_SECTOR_OBJECT|WALLFX_DONT_STICK);
-            uint16_t const nextwall = wall[k].nextwall;
             if (nextwall < MAXWALLS)
                 SET(wall[nextwall].extra, WALLFX_SECTOR_OBJECT|WALLFX_DONT_STICK);
         }
+
+        // interpolate floor and ceiling
+        if (InterpolateSectObj && (k != startwall))
+        {
+            setinterpolation(&(*sectp)->ceilingz);
+            setinterpolation(&(*sectp)->floorz);
+        }
     }
 
     if (!FoundOutsideLoop)
@@ -972,6 +995,8 @@ SectorObjectSetupBounds(SECTOR_OBJECTp sop)
                 ASSERT(sn < SIZ(sop->sp_num) - 1);
 
                 sop->sp_num[sn] = sp_num;
+                if (InterpolateSectObj)
+                    setspriteinterpolation(sp);
 
 
                 if (!TEST(sop->flags, SOBJ_SPRITE_OBJ))
@@ -1630,8 +1655,11 @@ MovePlayer(PLAYERp pp, SECTOR_OBJECTp sop, int nx, int ny)
     pp->posx += BOUND_4PIX(nx);
     pp->posy += BOUND_4PIX(ny);
 
+    if (!InterpolateSectObj)
+    {
         pp->oposx = pp->posx;
         pp->oposy = pp->posy;
+    }
 
     if (TEST(sop->flags, SOBJ_DONT_ROTATE))
     {
@@ -1676,7 +1704,9 @@ MovePlayer(PLAYERp pp, SECTOR_OBJECTp sop, int nx, int ny)
 
     // New angle is formed by taking last known angle and
     // adjusting by the delta angle
-    pp->oq16ang = pp->q16ang = fix16_from_int(NORM_ANGLE(pp->RevolveAng + pp->RevolveDeltaAng));
+    pp->q16ang = fix16_from_int(NORM_ANGLE(pp->RevolveAng + pp->RevolveDeltaAng));
+    if (!InterpolateSectObj)
+        pp->oq16ang = pp->q16ang;
 
     UpdatePlayerSprite(pp);
 }
@@ -1929,6 +1959,7 @@ PlayerPart:
                     pp->SpriteP->z = pp->loz;
                 }
             }
+            if (!InterpolateSectObj)
                 pp->oposz = pp->posz;
         }
         else
@@ -2044,6 +2075,8 @@ void KillSectorObjectSprites(SECTOR_OBJECTp sop)
         if (sp->picnum == ST1 && sp->hitag == SPAWN_SPOT)
             continue;
 
+        if (InterpolateSectObj)
+            stopspriteinterpolation(sp);
         KillSprite(sop->sp_num[i]);
     }
 

source/sw/src/weapon.cpp

@@ -31,6 +31,7 @@ Prepared for public release: 03/28/2005 - Charlie Wiederhold, 3D Realms
 #include "names2.h"
 #include "panel.h"
 #include "game.h"
+#include "interp.h"
 #include "tags.h"
 #include "common_game.h"
 #include "break.h"
@@ -11392,6 +11393,8 @@ AddSpriteToSectorObject(short SpriteNum, SECTOR_OBJECTp sop)
 
     ASSERT(sn < SIZ(sop->sp_num) - 1);
     sop->sp_num[sn] = SpriteNum;
+    if (InterpolateSectObj)
+        setspriteinterpolation(sp);
 
     SET(u->Flags, SPR_ON_SO_SECTOR|SPR_SO_ATTACHED);
 
@@ -11458,6 +11461,8 @@ SpawnBigGunFlames(int16_t Weapon, int16_t Operator, SECTOR_OBJECTp sop)
 
     ASSERT(sn < SIZ(sop->sp_num) - 1);
     sop->sp_num[sn] = explosion;
+    if (InterpolateSectObj)
+        setspriteinterpolation(exp);
 
     // Place sprite exactly where shoot point is
     //exp->x = eu->ox = sop->xmid - u->sx;