movement smoothing (other players less jerky with high PJ)

git-svn-id: svn://svn.code.sf.net/p/actiongame/code/trunk/ac@1579 e016b1c5-ed68-44aa-a2f7-31cac88cffde

source/src/clientgame.cpp

@@ -219,17 +219,43 @@ void movelocalplayer()
 }
 
 // use physics to extrapolate player position
+VARP(smoothmove, 0, 75, 100);
+VARP(smoothdist, 0, 8, 16);
+
 void moveotherplayers()
 {
     loopv(players) if(players[i] && players[i]->type==ENT_PLAYER)
     {
-        const int lagtime = lastmillis-players[i]->lastupdate;
-        if(lagtime>1000 && players[i]->state==CS_ALIVE)
+        playerent *d = players[i];
+        const int lagtime = lastmillis-d->lastupdate;
+        if(!lagtime || intermission) continue;
+        else if(lagtime>1000 && d->state==CS_ALIVE)
         {
-            players[i]->state = CS_LAGGED;
+            d->state = CS_LAGGED;
             continue;
         }
-        if(lagtime && (players[i]->state==CS_ALIVE || (players[i]->state==CS_DEAD && lastmillis-players[i]->lastpain<2000)) && !intermission) moveplayer(players[i], 2, false);
+        if(d->state==CS_ALIVE)
+        {
+            if(smoothmove && d->smoothmillis>0)
+            {
+                d->o = d->newpos;
+                d->yaw = d->newyaw;
+                d->pitch = d->newpitch;
+                moveplayer(d, 2, false);
+                d->newpos = d->o;
+                float k = 1.0f - float(lastmillis - d->smoothmillis)/smoothmove;
+                if(k>0)
+                {
+                    d->o.add(vec(d->deltapos).mul(k));
+                    d->yaw += d->deltayaw*k;
+                    if(d->yaw<0) d->yaw += 360;
+                    else if(d->yaw>=360) d->yaw -= 360;
+                    d->pitch += d->deltapitch*k;
+                }
+            }
+            else moveplayer(d, 2, false);
+        }
+        else if(d->state==CS_DEAD && lastmillis-d->lastpain<2000) moveplayer(d, 2, false);
     }
 }
 

source/src/clients2c.cpp

@@ -80,6 +80,8 @@ void parsepositions(ucharbuf &p)
             int f = getuint(p), seqcolor = (f>>6)&1;
             playerent *d = getclient(cn);
             if(!d || seqcolor!=(d->lifesequence&1)) continue;
+            vec oldpos(d->o);
+            float oldyaw = d->yaw, oldpitch = d->pitch;
             d->o = o;
             d->yaw = yaw;
             d->pitch = pitch;
@@ -96,6 +98,23 @@ void parsepositions(ucharbuf &p)
             updatecrouch(d, f&1);
             updatepos(d);
             updatelagtime(d);
+            extern int smoothmove, smoothdist;
+            if(smoothmove && d->smoothmillis>=0 && oldpos.dist(d->o) < smoothdist)
+            {
+                d->newpos = d->o;
+                d->newyaw = d->yaw;
+                d->newpitch = d->pitch;
+                d->o = oldpos;
+                d->yaw = oldyaw;
+                d->pitch = oldpitch;
+                (d->deltapos = oldpos).sub(d->newpos);
+                d->deltayaw = oldyaw - d->newyaw;
+                if(d->deltayaw > 180) d->deltayaw -= 360;
+                else if(d->deltayaw < -180) d->deltayaw += 360;
+                d->deltapitch = oldpitch - d->newpitch;
+                d->smoothmillis = lastmillis;
+            }
+            else d->smoothmillis = 0;
             if(d->state==CS_LAGGED || d->state==CS_SPAWNING) d->state = CS_ALIVE;
             break;
         }

source/src/entity.h

@@ -344,9 +344,14 @@ struct playerent : dynent, playerstate
 
     poshist history; // Previous stored locations of this player
 
+    vec deltapos, newpos;
+    float deltayaw, deltapitch, newyaw, newpitch;
+    int smoothmillis;
+
     playerent() : clientnum(-1), plag(0), ping(0), lifesequence(0), frags(0), flagscore(0), lastpain(0), clientrole(CR_DEFAULT),
                   skin(0), nextskin(0), spectating(SM_NONE), followplayercn(0),
-                  weaponsel(NULL), nextweaponsel(NULL), primweap(NULL), nextprimweap(NULL), lastattackweapon(NULL)
+                  weaponsel(NULL), nextweaponsel(NULL), primweap(NULL), nextprimweap(NULL), lastattackweapon(NULL),
+                  smoothmillis(-1)
     {
         type = ENT_PLAYER;
         name[0] = team[0] = 0;