]> git.xonotic.org Git - xonotic/darkplaces.git/blobdiff - sv_phys.c
physics: fix and refactor unsticking
[xonotic/darkplaces.git] / sv_phys.c
index 95598da83a3dae14de8fb570af55f17d818bbf7d..6d776f86f45d4af27d120271495fc405d901bc38 100644 (file)
--- a/sv_phys.c
+++ b/sv_phys.c
@@ -46,7 +46,7 @@ void SV_Physics_Toss (prvm_edict_t *ent);
 
 int SV_GetPitchSign(prvm_prog_t *prog, prvm_edict_t *ent)
 {
-       dp_model_t *model;
+       model_t *model;
        if (
                        (model = SV_GetModelFromEdict(ent))
                        ?
@@ -122,10 +122,11 @@ trace_t SV_TracePoint(const vec3_t start, int type, prvm_edict_t *passedict, int
        // matrices to transform into/out of other entity's space
        matrix4x4_t matrix, imatrix;
        // model of other entity
-       dp_model_t *model;
+       model_t *model;
        // list of entities to test for collisions
        int numtouchedicts;
        static prvm_edict_t *touchedicts[MAX_EDICTS];
+       int clipgroup;
 
        //return SV_TraceBox(start, vec3_origin, vec3_origin, end, type, passedict, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask);
 
@@ -146,7 +147,7 @@ trace_t SV_TracePoint(const vec3_t start, int type, prvm_edict_t *passedict, int
 
        if (type == MOVE_MISSILE)
        {
-               // LordHavoc: modified this, was = -15, now -= 15
+               // LadyHavoc: modified this, was = -15, now -= 15
                for (i = 0;i < 3;i++)
                {
                        clipmins2[i] -= 15;
@@ -164,8 +165,8 @@ trace_t SV_TracePoint(const vec3_t start, int type, prvm_edict_t *passedict, int
        // debug override to test against everything
        if (sv_debugmove.integer)
        {
-               clipboxmins[0] = clipboxmins[1] = clipboxmins[2] = -999999999;
-               clipboxmaxs[0] = clipboxmaxs[1] = clipboxmaxs[2] =  999999999;
+               clipboxmins[0] = clipboxmins[1] = clipboxmins[2] = (vec_t)-999999999;
+               clipboxmaxs[0] = clipboxmaxs[1] = clipboxmaxs[2] =  (vec_t)999999999;
        }
 
        // if the passedict is world, make it NULL (to avoid two checks each time)
@@ -176,6 +177,8 @@ trace_t SV_TracePoint(const vec3_t start, int type, prvm_edict_t *passedict, int
        // precalculate passedict's owner edict pointer for comparisons
        traceowner = passedict ? PRVM_PROG_TO_EDICT(PRVM_serveredictedict(passedict, owner)) : 0;
 
+       clipgroup = passedict ? (int)PRVM_serveredictfloat(passedict, clipgroup) : 0;
+
        // clip to entities
        // because this uses World_EntitiestoBox, we know all entity boxes overlap
        // the clip region, so we can skip culling checks in the loop below
@@ -206,6 +209,9 @@ trace_t SV_TracePoint(const vec3_t start, int type, prvm_edict_t *passedict, int
                        // don't clip owner against owned entities
                        if (passedictprog == PRVM_serveredictedict(touch, owner))
                                continue;
+                       // don't clip against any entities in the same clipgroup (DP_RM_CLIPGROUP)
+                       if (clipgroup && clipgroup == (int)PRVM_serveredictfloat(touch, clipgroup))
+                               continue;
                        // don't clip points against points (they can't collide)
                        if (VectorCompare(PRVM_serveredictvector(touch, mins), PRVM_serveredictvector(touch, maxs)) && (type != MOVE_MISSILE || !((int)PRVM_serveredictfloat(touch, flags) & FL_MONSTER)))
                                continue;
@@ -268,10 +274,11 @@ trace_t SV_TraceLine(const vec3_t start, const vec3_t end, int type, prvm_edict_
        // matrices to transform into/out of other entity's space
        matrix4x4_t matrix, imatrix;
        // model of other entity
-       dp_model_t *model;
+       model_t *model;
        // list of entities to test for collisions
        int numtouchedicts;
        static prvm_edict_t *touchedicts[MAX_EDICTS];
+       int clipgroup;
        if (VectorCompare(start, end))
                return SV_TracePoint(start, type, passedict, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask);
 
@@ -295,7 +302,7 @@ trace_t SV_TraceLine(const vec3_t start, const vec3_t end, int type, prvm_edict_
 
        if (type == MOVE_MISSILE)
        {
-               // LordHavoc: modified this, was = -15, now -= 15
+               // LadyHavoc: modified this, was = -15, now -= 15
                for (i = 0;i < 3;i++)
                {
                        clipmins2[i] -= 15;
@@ -313,8 +320,8 @@ trace_t SV_TraceLine(const vec3_t start, const vec3_t end, int type, prvm_edict_
        // debug override to test against everything
        if (sv_debugmove.integer)
        {
-               clipboxmins[0] = clipboxmins[1] = clipboxmins[2] = -999999999;
-               clipboxmaxs[0] = clipboxmaxs[1] = clipboxmaxs[2] =  999999999;
+               clipboxmins[0] = clipboxmins[1] = clipboxmins[2] = (vec_t)-999999999;
+               clipboxmaxs[0] = clipboxmaxs[1] = clipboxmaxs[2] =  (vec_t)999999999;
        }
 
        // if the passedict is world, make it NULL (to avoid two checks each time)
@@ -325,6 +332,8 @@ trace_t SV_TraceLine(const vec3_t start, const vec3_t end, int type, prvm_edict_
        // precalculate passedict's owner edict pointer for comparisons
        traceowner = passedict ? PRVM_PROG_TO_EDICT(PRVM_serveredictedict(passedict, owner)) : 0;
 
+       clipgroup = passedict ? (int)PRVM_serveredictfloat(passedict, clipgroup) : 0;
+
        // clip to entities
        // because this uses World_EntitiestoBox, we know all entity boxes overlap
        // the clip region, so we can skip culling checks in the loop below
@@ -355,6 +364,9 @@ trace_t SV_TraceLine(const vec3_t start, const vec3_t end, int type, prvm_edict_
                        // don't clip owner against owned entities
                        if (passedictprog == PRVM_serveredictedict(touch, owner))
                                continue;
+                       // don't clip against any entities in the same clipgroup (DP_RM_CLIPGROUP)
+                       if (clipgroup && clipgroup == (int)PRVM_serveredictfloat(touch, clipgroup))
+                               continue;
                        // don't clip points against points (they can't collide)
                        if (VectorCompare(PRVM_serveredictvector(touch, mins), PRVM_serveredictvector(touch, maxs)) && (type != MOVE_MISSILE || !((int)PRVM_serveredictfloat(touch, flags) & FL_MONSTER)))
                                continue;
@@ -397,7 +409,7 @@ SV_Move
 ==================
 */
 #if COLLISIONPARANOID >= 1
-trace_t SV_TraceBox_(const vec3_t start, const vec3_t mins, const vec3_t maxs, const vec3_t end, int type, prvm_edict_t *passedict, int hitsupercontentsmask, int skipsupercontentsmask, int skipmaterialflagsmask, float extend)
+static trace_t SV_TraceBox_(const vec3_t start, const vec3_t mins, const vec3_t maxs, const vec3_t end, int type, prvm_edict_t *passedict, int hitsupercontentsmask, int skipsupercontentsmask, int skipmaterialflagsmask, float extend)
 #else
 trace_t SV_TraceBox(const vec3_t start, const vec3_t mins, const vec3_t maxs, const vec3_t end, int type, prvm_edict_t *passedict, int hitsupercontentsmask, int skipsupercontentsmask, int skipmaterialflagsmask, float extend)
 #endif
@@ -407,7 +419,7 @@ trace_t SV_TraceBox(const vec3_t start, const vec3_t mins, const vec3_t maxs, co
        int i, bodysupercontents;
        int passedictprog;
        float pitchsign = 1;
-       qboolean pointtrace;
+       qbool pointtrace;
        prvm_edict_t *traceowner, *touch;
        trace_t trace;
        // temporary storage because prvm_vec_t may differ from vec_t
@@ -425,10 +437,11 @@ trace_t SV_TraceBox(const vec3_t start, const vec3_t mins, const vec3_t maxs, co
        // matrices to transform into/out of other entity's space
        matrix4x4_t matrix, imatrix;
        // model of other entity
-       dp_model_t *model;
+       model_t *model;
        // list of entities to test for collisions
        int numtouchedicts;
        static prvm_edict_t *touchedicts[MAX_EDICTS];
+       int clipgroup;
        if (VectorCompare(mins, maxs))
        {
                vec3_t shiftstart, shiftend;
@@ -462,7 +475,7 @@ trace_t SV_TraceBox(const vec3_t start, const vec3_t mins, const vec3_t maxs, co
 
        if (type == MOVE_MISSILE)
        {
-               // LordHavoc: modified this, was = -15, now -= 15
+               // LadyHavoc: modified this, was = -15, now -= 15
                for (i = 0;i < 3;i++)
                {
                        clipmins2[i] -= 15;
@@ -489,8 +502,8 @@ trace_t SV_TraceBox(const vec3_t start, const vec3_t mins, const vec3_t maxs, co
        // debug override to test against everything
        if (sv_debugmove.integer)
        {
-               clipboxmins[0] = clipboxmins[1] = clipboxmins[2] = -999999999;
-               clipboxmaxs[0] = clipboxmaxs[1] = clipboxmaxs[2] =  999999999;
+               clipboxmins[0] = clipboxmins[1] = clipboxmins[2] = (vec_t)-999999999;
+               clipboxmaxs[0] = clipboxmaxs[1] = clipboxmaxs[2] =  (vec_t)999999999;
        }
 
        // if the passedict is world, make it NULL (to avoid two checks each time)
@@ -503,6 +516,8 @@ trace_t SV_TraceBox(const vec3_t start, const vec3_t mins, const vec3_t maxs, co
        // precalculate passedict's owner edict pointer for comparisons
        traceowner = passedict ? PRVM_PROG_TO_EDICT(PRVM_serveredictedict(passedict, owner)) : 0;
 
+       clipgroup = passedict ? (int)PRVM_serveredictfloat(passedict, clipgroup) : 0;
+
        // clip to entities
        // because this uses World_EntitiestoBox, we know all entity boxes overlap
        // the clip region, so we can skip culling checks in the loop below
@@ -533,6 +548,9 @@ trace_t SV_TraceBox(const vec3_t start, const vec3_t mins, const vec3_t maxs, co
                        // don't clip owner against owned entities
                        if (passedictprog == PRVM_serveredictedict(touch, owner))
                                continue;
+                       // don't clip against any entities in the same clipgroup (DP_RM_CLIPGROUP)
+                       if (clipgroup && clipgroup == (int)PRVM_serveredictfloat(touch, clipgroup))
+                               continue;
                        // don't clip points against points (they can't collide)
                        if (pointtrace && VectorCompare(PRVM_serveredictvector(touch, mins), PRVM_serveredictvector(touch, maxs)) && (type != MOVE_MISSILE || !((int)PRVM_serveredictfloat(touch, flags) & FL_MONSTER)))
                                continue;
@@ -570,17 +588,17 @@ finished:
 }
 
 #if COLLISIONPARANOID >= 1
-trace_t SV_TraceBox(const vec3_t start, const vec3_t mins, const vec3_t maxs, const vec3_t end, int type, prvm_edict_t *passedict, int hitsupercontentsmask, int skipsupercontentsmask, int skipmaterialflagsmask)
+trace_t SV_TraceBox(const vec3_t start, const vec3_t mins, const vec3_t maxs, const vec3_t end, int type, prvm_edict_t *passedict, int hitsupercontentsmask, int skipsupercontentsmask, int skipmaterialflagsmask, float extend)
 {
        prvm_prog_t *prog = SVVM_prog;
        int endstuck;
        trace_t trace;
        vec3_t temp;
-       trace = SV_TraceBox_(start, mins, maxs, end, type, passedict, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask);
+       trace = SV_TraceBox_(start, mins, maxs, end, type, passedict, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask, extend);
        if (passedict)
        {
                VectorCopy(trace.endpos, temp);
-               endstuck = SV_TraceBox_(temp, mins, maxs, temp, type, passedict, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask).startsolid;
+               endstuck = SV_TraceBox_(temp, mins, maxs, temp, type, passedict, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask, extend).startsolid;
 #if COLLISIONPARANOID < 3
                if (trace.startsolid || endstuck)
 #endif
@@ -600,7 +618,7 @@ int SV_PointSuperContents(const vec3_t point)
        // matrices to transform into/out of other entity's space
        matrix4x4_t matrix, imatrix;
        // model of other entity
-       dp_model_t *model;
+       model_t *model;
        int frame;
        // list of entities to test for collisions
        int numtouchedicts;
@@ -658,7 +676,7 @@ int SV_EntitiesInBox(const vec3_t mins, const vec3_t maxs, int maxedicts, prvm_e
        vec3_t paddedmins, paddedmaxs;
        if (maxedicts < 1 || resultedicts == NULL)
                return 0;
-       // LordHavoc: discovered this actually causes its own bugs (dm6 teleporters being too close to info_teleport_destination)
+       // LadyHavoc: discovered this actually causes its own bugs (dm6 teleporters being too close to info_teleport_destination)
        //VectorSet(paddedmins, mins[0] - 10, mins[1] - 10, mins[2] - 1);
        //VectorSet(paddedmaxs, maxs[0] + 10, maxs[1] + 10, maxs[2] + 1);
        VectorCopy(mins, paddedmins);
@@ -671,7 +689,7 @@ int SV_EntitiesInBox(const vec3_t mins, const vec3_t maxs, int maxedicts, prvm_e
                for (edictindex = 1;edictindex < prog->num_edicts;edictindex++)
                {
                        ed = PRVM_EDICT_NUM(edictindex);
-                       if (!ed->priv.required->free && BoxesOverlap(PRVM_serveredictvector(ed, absmin), PRVM_serveredictvector(ed, absmax), paddedmins, paddedmaxs))
+                       if (!ed->free && BoxesOverlap(PRVM_serveredictvector(ed, absmin), PRVM_serveredictvector(ed, absmax), paddedmins, paddedmaxs))
                        {
                                resultedicts[numresultedicts++] = ed;
                                if (numresultedicts == maxedicts)
@@ -716,7 +734,7 @@ void SV_LinkEdict_TouchAreaGrid(prvm_edict_t *ent)
        if (ent == prog->edicts)
                return;         // don't add the world
 
-       if (ent->priv.server->free)
+       if (ent->free)
                return;
 
        if (PRVM_serveredictfloat(ent, solid) == SOLID_NOT)
@@ -786,14 +804,14 @@ SV_LinkEdict
 void SV_LinkEdict (prvm_edict_t *ent)
 {
        prvm_prog_t *prog = SVVM_prog;
-       dp_model_t *model;
+       model_t *model;
        vec3_t mins, maxs, entmins, entmaxs, entangles;
        int modelindex;
 
        if (ent == prog->edicts)
                return;         // don't add the world
 
-       if (ent->priv.server->free)
+       if (ent->free)
                return;
 
        modelindex = (int)PRVM_serveredictfloat(ent, modelindex);
@@ -857,35 +875,36 @@ void SV_LinkEdict (prvm_edict_t *ent)
                VectorAdd(PRVM_serveredictvector(ent, origin), PRVM_serveredictvector(ent, maxs), maxs);
        }
 
-//
-// to make items easier to pick up and allow them to be grabbed off
-// of shelves, the abs sizes are expanded
-//
-       if ((int)PRVM_serveredictfloat(ent, flags) & FL_ITEM)
+       if (sv_legacy_bbox_expand.integer)
        {
-               mins[0] -= 15;
-               mins[1] -= 15;
-               mins[2] -= 1;
-               maxs[0] += 15;
-               maxs[1] += 15;
-               maxs[2] += 1;
-       }
-       else
-       {
-               // because movement is clipped an epsilon away from an actual edge,
-               // we must fully check even when bounding boxes don't quite touch
-               mins[0] -= 1;
-               mins[1] -= 1;
-               mins[2] -= 1;
-               maxs[0] += 1;
-               maxs[1] += 1;
-               maxs[2] += 1;
+               if ((int)PRVM_serveredictfloat(ent, flags) & FL_ITEM)
+               {
+                       // to make items easier to pick up and allow them to be grabbed off
+                       // of shelves, the abs sizes are expanded
+                       mins[0] -= 15;
+                       mins[1] -= 15;
+                       mins[2] -= 1;
+                       maxs[0] += 15;
+                       maxs[1] += 15;
+                       maxs[2] += 1;
+               }
+               else
+               {
+                       // because movement is clipped an epsilon away from an actual edge,
+                       // we must fully check even when bounding boxes don't quite touch
+                       mins[0] -= 1;
+                       mins[1] -= 1;
+                       mins[2] -= 1;
+                       maxs[0] += 1;
+                       maxs[1] += 1;
+                       maxs[2] += 1;
+               }
        }
 
        VectorCopy(mins, PRVM_serveredictvector(ent, absmin));
        VectorCopy(maxs, PRVM_serveredictvector(ent, absmax));
 
-       World_LinkEdict(&sv.world, ent, mins, maxs);
+       World_LinkEdict(&sv.world, ent, mins, maxs, sv_areagrid_link_SOLID_NOT.integer);
 }
 
 /*
@@ -1022,25 +1041,25 @@ void SV_CheckVelocity (prvm_edict_t *ent)
 //
        for (i=0 ; i<3 ; i++)
        {
-               if (PRVM_IS_NAN(PRVM_serveredictvector(ent, velocity)[i]))
+               if (isnan(PRVM_serveredictvector(ent, velocity)[i]))
                {
                        Con_Printf("Got a NaN velocity on entity #%i (%s)\n", PRVM_NUM_FOR_EDICT(ent), PRVM_GetString(prog, PRVM_serveredictstring(ent, classname)));
                        PRVM_serveredictvector(ent, velocity)[i] = 0;
                }
-               if (PRVM_IS_NAN(PRVM_serveredictvector(ent, origin)[i]))
+               if (isnan(PRVM_serveredictvector(ent, origin)[i]))
                {
                        Con_Printf("Got a NaN origin on entity #%i (%s)\n", PRVM_NUM_FOR_EDICT(ent), PRVM_GetString(prog, PRVM_serveredictstring(ent, classname)));
                        PRVM_serveredictvector(ent, origin)[i] = 0;
                }
        }
 
-       // LordHavoc: a hack to ensure that the (rather silly) id1 quakec
+       // LadyHavoc: a hack to ensure that the (rather silly) id1 quakec
        // player_run/player_stand1 does not horribly malfunction if the
        // velocity becomes a denormalized float
        if (VectorLength2(PRVM_serveredictvector(ent, velocity)) < 0.0000001)
                VectorClear(PRVM_serveredictvector(ent, velocity));
 
-       // LordHavoc: max velocity fix, inspired by Maddes's source fixes, but this is faster
+       // LadyHavoc: max velocity fix, inspired by Maddes's source fixes, but this is faster
        wishspeed = DotProduct(PRVM_serveredictvector(ent, velocity), PRVM_serveredictvector(ent, velocity));
        if (wishspeed > sv_maxvelocity.value * sv_maxvelocity.value)
        {
@@ -1061,7 +1080,7 @@ in a frame.  Not used for pushmove objects, because they must be exact.
 Returns false if the entity removed itself.
 =============
 */
-static qboolean SV_RunThink (prvm_edict_t *ent)
+static qbool SV_RunThink (prvm_edict_t *ent)
 {
        prvm_prog_t *prog = SVVM_prog;
        int iterations;
@@ -1071,7 +1090,7 @@ static qboolean SV_RunThink (prvm_edict_t *ent)
        if (PRVM_serveredictfloat(ent, nextthink) <= 0 || PRVM_serveredictfloat(ent, nextthink) > sv.time + sv.frametime)
                return true;
 
-       for (iterations = 0;iterations < 128  && !ent->priv.server->free;iterations++)
+       for (iterations = 0;iterations < 128  && !ent->free;iterations++)
        {
                PRVM_serverglobalfloat(time) = max(sv.time, PRVM_serveredictfloat(ent, nextthink));
                PRVM_serveredictfloat(ent, nextthink) = 0;
@@ -1085,7 +1104,7 @@ static qboolean SV_RunThink (prvm_edict_t *ent)
                if (PRVM_serveredictfloat(ent, nextthink) <= PRVM_serverglobalfloat(time) || PRVM_serveredictfloat(ent, nextthink) > sv.time + sv.frametime || !sv_gameplayfix_multiplethinksperframe.integer)
                        break;
        }
-       return !ent->priv.server->free;
+       return !ent->free;
 }
 
 /*
@@ -1108,7 +1127,7 @@ static void SV_Impact (prvm_edict_t *e1, trace_t *trace)
 
        VM_SetTraceGlobals(prog, trace);
 
-       if (!e1->priv.server->free && !e2->priv.server->free && PRVM_serveredictfunction(e1, touch) && PRVM_serveredictfloat(e1, solid) != SOLID_NOT)
+       if (!e1->free && !e2->free && PRVM_serveredictfunction(e1, touch) && PRVM_serveredictfloat(e1, solid) != SOLID_NOT)
        {
                PRVM_serverglobalfloat(time) = sv.time;
                PRVM_serverglobaledict(self) = PRVM_EDICT_TO_PROG(e1);
@@ -1116,7 +1135,7 @@ static void SV_Impact (prvm_edict_t *e1, trace_t *trace)
                prog->ExecuteProgram(prog, PRVM_serveredictfunction(e1, touch), "QC function self.touch is missing");
        }
 
-       if (!e1->priv.server->free && !e2->priv.server->free && PRVM_serveredictfunction(e2, touch) && PRVM_serveredictfloat(e2, solid) != SOLID_NOT)
+       if (!e1->free && !e2->free && PRVM_serveredictfunction(e2, touch) && PRVM_serveredictfloat(e2, solid) != SOLID_NOT)
        {
                PRVM_serverglobalfloat(time) = sv.time;
                PRVM_serverglobaledict(self) = PRVM_EDICT_TO_PROG(e2);
@@ -1175,13 +1194,12 @@ If stepnormal is not NULL, the plane normal of any vertical wall hit will be sto
 ============
 */
 static float SV_Gravity (prvm_edict_t *ent);
-static qboolean SV_PushEntity (trace_t *trace, prvm_edict_t *ent, vec3_t push, qboolean dolink);
+static qbool SV_PushEntity (trace_t *trace, prvm_edict_t *ent, vec3_t push, qbool dolink, qbool checkstuck);
 #define MAX_CLIP_PLANES 5
-static int SV_FlyMove (prvm_edict_t *ent, float time, qboolean applygravity, float *stepnormal, int hitsupercontentsmask, int skipsupercontentsmask, int skipmaterialflagsmask, float stepheight)
+static int SV_FlyMove (prvm_edict_t *ent, float time, qbool applygravity, float *stepnormal, int hitsupercontentsmask, int skipsupercontentsmask, int skipmaterialflagsmask, float stepheight)
 {
        prvm_prog_t *prog = SVVM_prog;
-       int blocked, bumpcount;
-       int i, j, numplanes;
+       unsigned int i, j, numplanes, blocked, bumpcount;
        float d, time_left, gravity;
        vec3_t dir, push, planes[MAX_CLIP_PLANES];
        prvm_vec3_t primal_velocity, original_velocity, new_velocity, restore_velocity;
@@ -1219,7 +1237,7 @@ static int SV_FlyMove (prvm_edict_t *ent, float time, qboolean applygravity, flo
                        break;
 
                VectorScale(PRVM_serveredictvector(ent, velocity), time_left, push);
-               if(!SV_PushEntity(&trace, ent, push, false))
+               if(!SV_PushEntity(&trace, ent, push, false, true))
                {
                        // we got teleported by a touch function
                        // let's abort the move
@@ -1237,6 +1255,9 @@ static int SV_FlyMove (prvm_edict_t *ent, float time, qboolean applygravity, flo
 
                if (trace.fraction == 1)
                        break;
+
+               time_left *= 1 - trace.fraction;
+
                if (trace.plane.normal[2])
                {
                        if (trace.plane.normal[2] > 0.7)
@@ -1264,28 +1285,30 @@ static int SV_FlyMove (prvm_edict_t *ent, float time, qboolean applygravity, flo
                        trace_t steptrace3;
                        //Con_Printf("step %f %f %f : ", PRVM_serveredictvector(ent, origin)[0], PRVM_serveredictvector(ent, origin)[1], PRVM_serveredictvector(ent, origin)[2]);
                        VectorSet(steppush, 0, 0, stepheight);
+                       VectorScale(PRVM_serveredictvector(ent, velocity), time_left, push);
                        VectorCopy(PRVM_serveredictvector(ent, origin), org);
-                       if(!SV_PushEntity(&steptrace, ent, steppush, false))
+                       if(!SV_PushEntity(&steptrace, ent, steppush, false, true))
                        {
                                blocked |= 8;
                                break;
                        }
                        //Con_Printf("%f %f %f : ", PRVM_serveredictvector(ent, origin)[0], PRVM_serveredictvector(ent, origin)[1], PRVM_serveredictvector(ent, origin)[2]);
-                       if(!SV_PushEntity(&steptrace2, ent, push, false))
+                       if(!SV_PushEntity(&steptrace2, ent, push, false, true))
                        {
                                blocked |= 8;
                                break;
                        }
                        //Con_Printf("%f %f %f : ", PRVM_serveredictvector(ent, origin)[0], PRVM_serveredictvector(ent, origin)[1], PRVM_serveredictvector(ent, origin)[2]);
                        VectorSet(steppush, 0, 0, org[2] - PRVM_serveredictvector(ent, origin)[2]);
-                       if(!SV_PushEntity(&steptrace3, ent, steppush, false))
+                       if(!SV_PushEntity(&steptrace3, ent, steppush, false, true))
                        {
                                blocked |= 8;
                                break;
                        }
                        //Con_Printf("%f %f %f : ", PRVM_serveredictvector(ent, origin)[0], PRVM_serveredictvector(ent, origin)[1], PRVM_serveredictvector(ent, origin)[2]);
                        // accept the new position if it made some progress...
-                       if (fabs(PRVM_serveredictvector(ent, origin)[0] - org[0]) >= 0.03125 || fabs(PRVM_serveredictvector(ent, origin)[1] - org[1]) >= 0.03125)
+                       // previously this checked if absolute distance >= 0.03125 which made stepping up unreliable
+                       if (PRVM_serveredictvector(ent, origin)[0] - org[0] || PRVM_serveredictvector(ent, origin)[1] - org[1])
                        {
                                //Con_Printf("accepted (delta %f %f %f)\n", PRVM_serveredictvector(ent, origin)[0] - org[0], PRVM_serveredictvector(ent, origin)[1] - org[1], PRVM_serveredictvector(ent, origin)[2] - org[2]);
                                trace = steptrace2;
@@ -1308,6 +1331,14 @@ static int SV_FlyMove (prvm_edict_t *ent, float time, qboolean applygravity, flo
                        if (stepnormal)
                                VectorCopy(trace.plane.normal, stepnormal);
                }
+
+               // Unlike some other movetypes Quake's SV_FlyMove calls SV_Impact only after setting ONGROUND which id1 fiends rely on.
+               // If we stepped up (sv_gameplayfix_stepmultipletimes) this will impact the steptrace2 plane instead of the original.
+               if (PRVM_serveredictfloat(ent, solid) >= SOLID_TRIGGER && trace.ent)
+                       SV_Impact(ent, &trace);
+               if (ent->free)
+                       return blocked; // removed by the impact function
+
                if (trace.fraction >= 0.001)
                {
                        // actually covered some distance
@@ -1315,8 +1346,6 @@ static int SV_FlyMove (prvm_edict_t *ent, float time, qboolean applygravity, flo
                        numplanes = 0;
                }
 
-               time_left *= 1 - trace.fraction;
-
                // clipped to another plane
                if (numplanes >= MAX_CLIP_PLANES)
                {
@@ -1372,7 +1401,7 @@ static int SV_FlyMove (prvm_edict_t *ent, float time, qboolean applygravity, flo
                                break;
                        }
                        CrossProduct(planes[0], planes[1], dir);
-                       // LordHavoc: thanks to taniwha of QuakeForge for pointing out this fix for slowed falling in corners
+                       // LadyHavoc: thanks to taniwha of QuakeForge for pointing out this fix for slowed falling in corners
                        VectorNormalize(dir);
                        d = DotProduct(dir, PRVM_serveredictvector(ent, velocity));
                        VectorScale(dir, d, PRVM_serveredictvector(ent, velocity));
@@ -1392,13 +1421,13 @@ static int SV_FlyMove (prvm_edict_t *ent, float time, qboolean applygravity, flo
        /*
        if ((blocked & 1) == 0 && bumpcount > 1)
        {
-               // LordHavoc: fix the 'fall to your death in a wedge corner' glitch
+               // LadyHavoc: fix the 'fall to your death in a wedge corner' glitch
                // flag ONGROUND if there's ground under it
                trace = SV_TraceBox(PRVM_serveredictvector(ent, origin), PRVM_serveredictvector(ent, mins), PRVM_serveredictvector(ent, maxs), end, MOVE_NORMAL, ent, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask);
        }
        */
 
-       // LordHavoc: this came from QW and allows you to get out of water more easily
+       // LadyHavoc: this came from QW and allows you to get out of water more easily
        if (sv_gameplayfix_easierwaterjump.integer && ((int)PRVM_serveredictfloat(ent, flags) & FL_WATERJUMP) && !(blocked & 8))
                VectorCopy(primal_velocity, PRVM_serveredictvector(ent, velocity));
 
@@ -1440,7 +1469,7 @@ PUSHMOVE
 ===============================================================================
 */
 
-static qboolean SV_NudgeOutOfSolid_PivotIsKnownGood(prvm_edict_t *ent, vec3_t pivot)
+static qbool SV_NudgeOutOfSolid_PivotIsKnownGood(prvm_edict_t *ent, vec3_t pivot)
 {
        prvm_prog_t *prog = SVVM_prog;
        int bump;
@@ -1521,46 +1550,6 @@ static qboolean SV_NudgeOutOfSolid_PivotIsKnownGood(prvm_edict_t *ent, vec3_t pi
        return true;
 }
 
-qboolean SV_NudgeOutOfSolid(prvm_edict_t *ent)
-{
-       prvm_prog_t *prog = SVVM_prog;
-       int bump, pass;
-       trace_t stucktrace;
-       vec3_t stuckorigin;
-       vec3_t stuckmins, stuckmaxs;
-       vec_t nudge;
-       vec_t separation = sv_gameplayfix_nudgeoutofsolid_separation.value;
-       if (sv.worldmodel && sv.worldmodel->brushq1.numclipnodes)
-               separation = 0.0f; // when using hulls, it can not be enlarged
-       VectorCopy(PRVM_serveredictvector(ent, mins), stuckmins);
-       VectorCopy(PRVM_serveredictvector(ent, maxs), stuckmaxs);
-       stuckmins[0] -= separation;
-       stuckmins[1] -= separation;
-       stuckmins[2] -= separation;
-       stuckmaxs[0] += separation;
-       stuckmaxs[1] += separation;
-       stuckmaxs[2] += separation;
-       // first pass we try to get it out of brush entities
-       // second pass we try to get it out of world only (can't win them all)
-       for (pass = 0;pass < 2;pass++)
-       {
-               VectorCopy(PRVM_serveredictvector(ent, origin), stuckorigin);
-               for (bump = 0;bump < 10;bump++)
-               {
-                       stucktrace = SV_TraceBox(stuckorigin, stuckmins, stuckmaxs, stuckorigin, pass ? MOVE_WORLDONLY : MOVE_NOMONSTERS, ent, SV_GenericHitSuperContentsMask(ent), 0, 0, collision_extendmovelength.value);
-                       if (!stucktrace.bmodelstartsolid || stucktrace.startdepth >= 0)
-                       {
-                               // found a good location, use it
-                               VectorCopy(stuckorigin, PRVM_serveredictvector(ent, origin));
-                               return true;
-                       }
-                       nudge = -stucktrace.startdepth;
-                       VectorMA(stuckorigin, nudge, stucktrace.startdepthnormal, stuckorigin);
-               }
-       }
-       return false;
-}
-
 /*
 ============
 SV_PushEntity
@@ -1570,7 +1559,7 @@ The trace struct is filled with the trace that has been done.
 Returns true if the push did not result in the entity being teleported by QC code.
 ============
 */
-static qboolean SV_PushEntity (trace_t *trace, prvm_edict_t *ent, vec3_t push, qboolean dolink)
+static qbool SV_PushEntity (trace_t *trace, prvm_edict_t *ent, vec3_t push, qbool dolink, qbool checkstuck)
 {
        prvm_prog_t *prog = SVVM_prog;
        int solid;
@@ -1585,12 +1574,6 @@ static qboolean SV_PushEntity (trace_t *trace, prvm_edict_t *ent, vec3_t push, q
        VectorCopy(PRVM_serveredictvector(ent, mins), mins);
        VectorCopy(PRVM_serveredictvector(ent, maxs), maxs);
 
-       // move start position out of solids
-       if (sv_gameplayfix_nudgeoutofsolid.integer && sv_gameplayfix_nudgeoutofsolid_separation.value >= 0)
-       {
-               SV_NudgeOutOfSolid(ent);
-       }
-
        VectorCopy(PRVM_serveredictvector(ent, origin), start);
        VectorAdd(start, push, end);
 
@@ -1604,11 +1587,21 @@ static qboolean SV_PushEntity (trace_t *trace, prvm_edict_t *ent, vec3_t push, q
                type = MOVE_NORMAL;
 
        *trace = SV_TraceBox(start, mins, maxs, end, type, ent, SV_GenericHitSuperContentsMask(ent), 0, 0, collision_extendmovelength.value);
-       // fail the move if stuck in world
-       if (trace->worldstartsolid)
-               return true;
+       if (trace->allsolid && checkstuck)
+       {
+               if (SV_UnstickEntity(ent))
+               {
+                       VectorCopy(PRVM_serveredictvector(ent, origin), start);
+                       VectorAdd(start, push, end);
+                       *trace = SV_TraceBox(start, mins, maxs, end, type, ent, SV_GenericHitSuperContentsMask(ent), 0, 0, collision_extendmovelength.value);
+               }
+               // abort move if we're stuck in the world (and didn't make it out)
+               else if (trace->worldstartsolid)
+                       return true;
+       }
 
        VectorCopy(trace->endpos, PRVM_serveredictvector(ent, origin));
+       VectorCopy(trace->endpos, PRVM_serveredictvector(ent, oldorigin)); // for SV_UnstickEntity()
 
        ent->priv.required->mark = PRVM_EDICT_MARK_WAIT_FOR_SETORIGIN; // -2: setorigin running
 
@@ -1623,10 +1616,12 @@ static qboolean SV_PushEntity (trace_t *trace, prvm_edict_t *ent, vec3_t push, q
 #endif
 
        if (dolink)
+       {
                SV_LinkEdict_TouchAreaGrid(ent);
 
-       if((PRVM_serveredictfloat(ent, solid) >= SOLID_TRIGGER && trace->ent && (!((int)PRVM_serveredictfloat(ent, flags) & FL_ONGROUND) || PRVM_serveredictedict(ent, groundentity) != PRVM_EDICT_TO_PROG(trace->ent))))
-               SV_Impact (ent, trace);
+               if((PRVM_serveredictfloat(ent, solid) >= SOLID_TRIGGER && trace->ent && (!((int)PRVM_serveredictfloat(ent, flags) & FL_ONGROUND) || PRVM_serveredictedict(ent, groundentity) != PRVM_EDICT_TO_PROG(trace->ent))))
+                       SV_Impact (ent, trace);
+       }
 
        if(ent->priv.required->mark == PRVM_EDICT_MARK_SETORIGIN_CAUGHT)
        {
@@ -1658,13 +1653,13 @@ static void SV_PushMove (prvm_edict_t *pusher, float movetime)
        int i, e, index;
        int pusherowner, pusherprog;
        int checkcontents;
-       qboolean rotated;
+       qbool rotated;
        float savesolid, movetime2, pushltime;
        vec3_t mins, maxs, move, move1, moveangle, pushorig, pushang, a, forward, left, up, org, pushermins, pushermaxs, checkorigin, checkmins, checkmaxs;
        int num_moved;
        int numcheckentities;
        static prvm_edict_t *checkentities[MAX_EDICTS];
-       dp_model_t *pushermodel;
+       model_t *pushermodel;
        trace_t trace, trace2;
        matrix4x4_t pusherfinalmatrix, pusherfinalimatrix;
        static unsigned short moved_edicts[MAX_EDICTS];
@@ -1678,13 +1673,13 @@ static void SV_PushMove (prvm_edict_t *pusher, float movetime)
 
        switch ((int) PRVM_serveredictfloat(pusher, solid))
        {
-       // LordHavoc: valid pusher types
+       // LadyHavoc: valid pusher types
        case SOLID_BSP:
        case SOLID_BBOX:
        case SOLID_SLIDEBOX:
-       case SOLID_CORPSE: // LordHavoc: this would be weird...
+       case SOLID_CORPSE: // LadyHavoc: this would be weird...
                break;
-       // LordHavoc: no collisions
+       // LadyHavoc: no collisions
        case SOLID_NOT:
        case SOLID_TRIGGER:
                VectorMA (PRVM_serveredictvector(pusher, origin), movetime, PRVM_serveredictvector(pusher, velocity), PRVM_serveredictvector(pusher, origin));
@@ -1872,7 +1867,7 @@ static void SV_PushMove (prvm_edict_t *pusher, float movetime)
 
                // try moving the contacted entity
                PRVM_serveredictfloat(pusher, solid) = SOLID_NOT;
-               if(!SV_PushEntity (&trace, check, move, true))
+               if(!SV_PushEntity(&trace, check, move, true, true))
                {
                        // entity "check" got teleported
                        PRVM_serveredictvector(check, angles)[1] += trace.fraction * moveangle[1];
@@ -1904,7 +1899,7 @@ static void SV_PushMove (prvm_edict_t *pusher, float movetime)
                        {
                                // hack to invoke all necessary movement triggers
                                VectorClear(move2);
-                               if(!SV_PushEntity(&trace2, check, move2, true))
+                               if(!SV_PushEntity(&trace2, check, move2, true, true))
                                {
                                        // entity "check" got teleported
                                        continue;
@@ -1965,7 +1960,7 @@ SV_Physics_Pusher
 static void SV_Physics_Pusher (prvm_edict_t *ent)
 {
        prvm_prog_t *prog = SVVM_prog;
-       float thinktime, oldltime, movetime;
+       prvm_vec_t thinktime, oldltime, movetime;
 
        oldltime = PRVM_serveredictfloat(ent, ltime);
 
@@ -2021,9 +2016,10 @@ static float unstickoffsets[] =
 
 typedef enum unstickresult_e
 {
+       // matching the DP_QC_NUDGEOUTOFSOLID return values
        UNSTICK_STUCK = 0,
-       UNSTICK_GOOD = 1,
-       UNSTICK_UNSTUCK = 2
+       UNSTICK_GOOD = -1, ///< didn't need to be unstuck
+       UNSTICK_UNSTUCK = 1
 }
 unstickresult_t;
 
@@ -2041,8 +2037,6 @@ static unstickresult_t SV_UnstickEntityReturnOffset (prvm_edict_t *ent, vec3_t o
                if (!SV_TestEntityPosition(ent, unstickoffsets + i))
                {
                        VectorCopy(unstickoffsets + i, offset);
-                       SV_LinkEdict(ent);
-                       //SV_LinkEdict_TouchAreaGrid(ent);
                        return UNSTICK_UNSTUCK;
                }
        }
@@ -2055,44 +2049,15 @@ static unstickresult_t SV_UnstickEntityReturnOffset (prvm_edict_t *ent, vec3_t o
                VectorClear(offset);
                offset[2] = -i;
                if (!SV_TestEntityPosition(ent, offset))
-               {
-                       SV_LinkEdict(ent);
-                       //SV_LinkEdict_TouchAreaGrid(ent);
                        return UNSTICK_UNSTUCK;
-               }
                offset[2] = i;
                if (!SV_TestEntityPosition(ent, offset))
-               {
-                       SV_LinkEdict(ent);
-                       //SV_LinkEdict_TouchAreaGrid(ent);
                        return UNSTICK_UNSTUCK;
-               }
        }
 
        return UNSTICK_STUCK;
 }
 
-qboolean SV_UnstickEntity (prvm_edict_t *ent)
-{
-       prvm_prog_t *prog = SVVM_prog;
-       vec3_t offset;
-       switch(SV_UnstickEntityReturnOffset(ent, offset))
-       {
-               case UNSTICK_GOOD:
-                       return true;
-               case UNSTICK_UNSTUCK:
-                       Con_DPrintf("Unstuck entity %i (classname \"%s\") with offset %f %f %f.\n", (int)PRVM_EDICT_TO_PROG(ent), PRVM_GetString(prog, PRVM_serveredictstring(ent, classname)), offset[0], offset[1], offset[2]);
-                       return true;
-               case UNSTICK_STUCK:
-                       if (developer_extra.integer)
-                               Con_DPrintf("Stuck entity %i (classname \"%s\").\n", (int)PRVM_EDICT_TO_PROG(ent), PRVM_GetString(prog, PRVM_serveredictstring(ent, classname)));
-                       return false;
-               default:
-                       Con_Printf("SV_UnstickEntityReturnOffset returned a value outside its enum.\n");
-                       return false;
-       }
-}
-
 /*
 =============
 SV_CheckStuck
@@ -2101,32 +2066,54 @@ This is a big hack to try and fix the rare case of getting stuck in the world
 clipping hull.
 =============
 */
-static void SV_CheckStuck (prvm_edict_t *ent)
+qbool SV_UnstickEntity (prvm_edict_t *ent)
 {
        prvm_prog_t *prog = SVVM_prog;
        vec3_t offset;
 
+       if (sv_gameplayfix_nudgeoutofsolid.integer && sv_gameplayfix_nudgeoutofsolid_separation.value >= 0
+       && sv.worldmodel->TraceBox == Mod_CollisionBIH_TraceBox) // Mod_Q1BSP_TraceBox doesn't support startdepth
+       {
+               VectorCopy(PRVM_serveredictvector(ent, origin), offset);
+               switch (PHYS_NudgeOutOfSolid(prog, ent))
+               {
+                       case UNSTICK_GOOD:
+                               return true;
+                       case UNSTICK_UNSTUCK:
+                               VectorSubtract(PRVM_serveredictvector(ent, origin), offset, offset);
+                               Con_DPrintf("NudgeOutOfSolid fixed stuck entity %i (classname \"%s\") with offset %f %f %f.\n", (int)PRVM_EDICT_TO_PROG(ent), PRVM_GetString(prog, PRVM_serveredictstring(ent, classname)), offset[0], offset[1], offset[2]);
+                               return true;
+                       case UNSTICK_STUCK:
+                               Con_DPrintf(CON_WARN "NudgeOutOfSolid couldn't fix stuck entity %i (classname \"%s\").\n", (int)PRVM_EDICT_TO_PROG(ent), PRVM_GetString(prog, PRVM_serveredictstring(ent, classname)));
+                               return false;
+                       default:
+                               Con_Printf("NudgeOutOfSolid returned a value outside its enum.\n");
+                               return false;
+               }
+       }
+
+       if (!(PRVM_NUM_FOR_EDICT(ent) <= svs.maxclients ? sv_gameplayfix_unstickplayers : sv_gameplayfix_unstickentities).integer)
+               return false;
+
        switch(SV_UnstickEntityReturnOffset(ent, offset))
        {
                case UNSTICK_GOOD:
-                       VectorCopy (PRVM_serveredictvector(ent, origin), PRVM_serveredictvector(ent, oldorigin));
-                       break;
+                       return true;
                case UNSTICK_UNSTUCK:
-                       Con_DPrintf("Unstuck player entity %i (classname \"%s\") with offset %f %f %f.\n", (int)PRVM_EDICT_TO_PROG(ent), PRVM_GetString(prog, PRVM_serveredictstring(ent, classname)), offset[0], offset[1], offset[2]);
-                       break;
+                       Con_DPrintf("Unstuck entity %i (classname \"%s\") with offset %f %f %f.\n", (int)PRVM_EDICT_TO_PROG(ent), PRVM_GetString(prog, PRVM_serveredictstring(ent, classname)), offset[0], offset[1], offset[2]);
+                       return true;
                case UNSTICK_STUCK:
                        VectorSubtract(PRVM_serveredictvector(ent, oldorigin), PRVM_serveredictvector(ent, origin), offset);
                        if (!SV_TestEntityPosition(ent, offset))
                        {
-                               Con_DPrintf("Unstuck player entity %i (classname \"%s\") by restoring oldorigin.\n", (int)PRVM_EDICT_TO_PROG(ent), PRVM_GetString(prog, PRVM_serveredictstring(ent, classname)));
-                               SV_LinkEdict(ent);
-                               //SV_LinkEdict_TouchAreaGrid(ent);
+                               Con_DPrintf("Unstuck entity %i (classname \"%s\") by restoring oldorigin.\n", (int)PRVM_EDICT_TO_PROG(ent), PRVM_GetString(prog, PRVM_serveredictstring(ent, classname)));
+                               return true;
                        }
-                       else
-                               Con_DPrintf("Stuck player entity %i (classname \"%s\").\n", (int)PRVM_EDICT_TO_PROG(ent), PRVM_GetString(prog, PRVM_serveredictstring(ent, classname)));
-                       break;
+                       Con_DPrintf(CON_WARN "Stuck entity %i (classname \"%s\").\n", (int)PRVM_EDICT_TO_PROG(ent), PRVM_GetString(prog, PRVM_serveredictstring(ent, classname)));
+                       return false;
                default:
                        Con_Printf("SV_UnstickEntityReturnOffset returned a value outside its enum.\n");
+                       return false;
        }
 }
 
@@ -2136,7 +2123,7 @@ static void SV_CheckStuck (prvm_edict_t *ent)
 SV_CheckWater
 =============
 */
-static qboolean SV_CheckWater (prvm_edict_t *ent)
+static qbool SV_CheckWater (prvm_edict_t *ent)
 {
        prvm_prog_t *prog = SVVM_prog;
        int cont;
@@ -2290,16 +2277,13 @@ static void SV_WalkMove (prvm_edict_t *ent)
        int type;
        vec3_t upmove, downmove, start_origin, start_velocity, stepnormal, originalmove_origin, originalmove_velocity, entmins, entmaxs;
        trace_t downtrace, trace;
-       qboolean applygravity;
+       qbool applygravity;
 
        // if frametime is 0 (due to client sending the same timestamp twice),
        // don't move
        if (sv.frametime <= 0)
                return;
 
-       if (sv_gameplayfix_unstickplayers.integer)
-               SV_CheckStuck (ent);
-
        applygravity = !SV_CheckWater (ent) && PRVM_serveredictfloat(ent, movetype) == MOVETYPE_WALK && ! ((int)PRVM_serveredictfloat(ent, flags) & FL_WATERJUMP);
 
        SV_CheckVelocity(ent);
@@ -2332,7 +2316,11 @@ static void SV_WalkMove (prvm_edict_t *ent)
                VectorCopy(PRVM_serveredictvector(ent, maxs), entmaxs);
                trace = SV_TraceBox(upmove, entmins, entmaxs, downmove, type, ent, SV_GenericHitSuperContentsMask(ent), skipsupercontentsmask, skipmaterialflagsmask, collision_extendmovelength.value);
                if(trace.fraction < 1 && trace.plane.normal[2] > 0.7)
+               {
                        clip |= 1; // but we HAVE found a floor
+                       // set groundentity so we get carried when walking onto a mover with sv_gameplayfix_nogravityonground
+                       PRVM_serveredictedict(ent, groundentity) = PRVM_EDICT_TO_PROG(trace.ent);
+               }
        }
 
        // if the move did not hit the ground at any point, we're not on ground
@@ -2385,7 +2373,7 @@ static void SV_WalkMove (prvm_edict_t *ent)
                // move up
                VectorClear (upmove);
                upmove[2] = sv_stepheight.value;
-               if(!SV_PushEntity(&trace, ent, upmove, true))
+               if(!SV_PushEntity(&trace, ent, upmove, true, true))
                {
                        // we got teleported when upstepping... must abort the move
                        return;
@@ -2437,7 +2425,7 @@ static void SV_WalkMove (prvm_edict_t *ent)
        // move down
        VectorClear (downmove);
        downmove[2] = -sv_stepheight.value + start_velocity[2]*sv.frametime;
-       if(!SV_PushEntity (&downtrace, ent, downmove, true))
+       if(!SV_PushEntity(&downtrace, ent, downmove, true, true))
        {
                // we got teleported when downstepping... must abort the move
                return;
@@ -2448,7 +2436,7 @@ static void SV_WalkMove (prvm_edict_t *ent)
                // this has been disabled so that you can't jump when you are stepping
                // up while already jumping (also known as the Quake2 double jump bug)
 #if 0
-               // LordHavoc: disabled this check so you can walk on monsters/players
+               // LadyHavoc: disabled this check so you can walk on monsters/players
                //if (PRVM_serveredictfloat(ent, solid) == SOLID_BSP)
                {
                        //Con_Printf("onground\n");
@@ -2490,7 +2478,7 @@ static void SV_Physics_Follow (prvm_edict_t *ent)
        vec3_t vf, vr, vu, angles, v;
        prvm_edict_t *e;
 
-       // LordHavoc: implemented rotation on MOVETYPE_FOLLOW objects
+       // LadyHavoc: implemented rotation on MOVETYPE_FOLLOW objects
        e = PRVM_PROG_TO_EDICT(PRVM_serveredictedict(ent, aiment));
        if (PRVM_serveredictvector(e, angles)[0] == PRVM_serveredictvector(ent, punchangle)[0] && PRVM_serveredictvector(e, angles)[1] == PRVM_serveredictvector(ent, punchangle)[1] && PRVM_serveredictvector(e, angles)[2] == PRVM_serveredictvector(ent, punchangle)[2])
        {
@@ -2537,7 +2525,7 @@ static void SV_CheckWaterTransition (prvm_edict_t *ent)
 {
        vec3_t entorigin;
        prvm_prog_t *prog = SVVM_prog;
-       // LordHavoc: bugfixes in this function are keyed to the sv_gameplayfix_bugfixedcheckwatertransition cvar - if this cvar is 0 then all the original bugs should be reenabled for compatibility
+       // LadyHavoc: bugfixes in this function are keyed to the sv_gameplayfix_bugfixedcheckwatertransition cvar - if this cvar is 0 then all the original bugs should be reenabled for compatibility
        int cont;
        VectorCopy(PRVM_serveredictvector(ent, origin), entorigin);
        cont = Mod_Q1BSP_NativeContentsFromSuperContents(SV_PointSuperContents(entorigin));
@@ -2608,7 +2596,7 @@ void SV_Physics_Toss (prvm_edict_t *ent)
                        // we can trust FL_ONGROUND if groundentity is world because it never moves
                        return;
                }
-               else if (ent->priv.server->suspendedinairflag && groundentity->priv.server->free)
+               else if (ent->priv.server->suspendedinairflag && groundentity->free)
                {
                        // if ent was supported by a brush model on previous frame,
                        // and groundentity is now freed, set groundentity to 0 (world)
@@ -2639,19 +2627,12 @@ void SV_Physics_Toss (prvm_edict_t *ent)
        {
        // move origin
                VectorScale(PRVM_serveredictvector(ent, velocity), movetime, move);
-               if(!SV_PushEntity(&trace, ent, move, true))
+               // The buzzsaw traps in r2m6 and r2m7 use MOVETYPE_FLY and rely on moving while stuck in the world.
+               // Quake movetypes checked allsolid only in SV_FlyMove().
+               if(!SV_PushEntity(&trace, ent, move, true, PRVM_serveredictfloat(ent, movetype) != MOVETYPE_FLY))
                        return; // teleported
-               if (ent->priv.server->free)
+               if (ent->free)
                        return;
-               if (trace.bmodelstartsolid && sv_gameplayfix_unstickentities.integer)
-               {
-                       // try to unstick the entity
-                       SV_UnstickEntity(ent);
-                       if(!SV_PushEntity(&trace, ent, move, true))
-                               return; // teleported
-                       if (ent->priv.server->free)
-                               return;
-               }
                if (trace.fraction == 1)
                        break;
                movetime *= 1 - min(1, trace.fraction);
@@ -2680,7 +2661,7 @@ void SV_Physics_Toss (prvm_edict_t *ent)
                        ent_gravity = PRVM_serveredictfloat(ent, gravity);
                        if (!ent_gravity)
                                ent_gravity = 1.0f;
-                       // LordHavoc: fixed grenades not bouncing when fired down a slope
+                       // LadyHavoc: fixed grenades not bouncing when fired down a slope
                        if (sv_gameplayfix_grenadebouncedownslopes.integer)
                                d = fabs(DotProduct(trace.plane.normal, PRVM_serveredictvector(ent, velocity)));
                        else
@@ -2821,7 +2802,7 @@ static void SV_Physics_Entity (prvm_edict_t *ent)
        // (if an ent spawns a higher numbered ent, it moves in the same frame,
        //  but if it spawns a lower numbered ent, it doesn't - this never moves
        //  ents in the first frame regardless)
-       qboolean runmove = ent->priv.server->move;
+       qbool runmove = ent->priv.server->move;
        ent->priv.server->move = true;
        if (!runmove && sv_gameplayfix_delayprojectiles.integer > 0)
                return;
@@ -2832,7 +2813,7 @@ static void SV_Physics_Entity (prvm_edict_t *ent)
                SV_Physics_Pusher (ent);
                break;
        case MOVETYPE_NONE:
-               // LordHavoc: manually inlined the thinktime check here because MOVETYPE_NONE is used on so many objects
+               // LadyHavoc: manually inlined the thinktime check here because MOVETYPE_NONE is used on so many objects
                if (PRVM_serveredictfloat(ent, nextthink) > 0 && PRVM_serveredictfloat(ent, nextthink) <= sv.time + sv.frametime)
                        SV_RunThink (ent);
                break;
@@ -2939,6 +2920,7 @@ static void SV_Physics_ClientEntity_NoThink (prvm_edict_t *ent)
        }
 }
 
+// asynchronous path
 void SV_Physics_ClientMove(void)
 {
        prvm_prog_t *prog = SVVM_prog;
@@ -2947,7 +2929,7 @@ void SV_Physics_ClientMove(void)
 
        // call player physics, this needs the proper frametime
        PRVM_serverglobalfloat(frametime) = sv.frametime;
-       SV_ClientThink();
+       SV_PlayerPhysics();
 
        // call standard client pre-think, with frametime = 0
        PRVM_serverglobalfloat(time) = sv.time;
@@ -2975,7 +2957,7 @@ void SV_Physics_ClientMove(void)
                // angle fixing was requested by physics code...
                // so store the current angles for later use
                VectorCopy(PRVM_serveredictvector(ent, angles), host_client->fixangle_angles);
-               host_client->fixangle_angles_set = TRUE;
+               host_client->fixangle_angles_set = true;
 
                // and clear fixangle for the next frame
                PRVM_serveredictfloat(ent, fixangle) = 0;
@@ -2995,7 +2977,7 @@ static void SV_Physics_ClientEntity_PreThink(prvm_edict_t *ent)
        // don't run physics here if running asynchronously
        if (host_client->clmovement_inputtimeout <= 0)
        {
-               SV_ClientThink();
+               SV_PlayerPhysics();
                //host_client->cmd.time = max(host_client->cmd.time, sv.time);
        }
 
@@ -3034,7 +3016,7 @@ static void SV_Physics_ClientEntity_PostThink(prvm_edict_t *ent)
                // angle fixing was requested by physics code...
                // so store the current angles for later use
                VectorCopy(PRVM_serveredictvector(ent, angles), host_client->fixangle_angles);
-               host_client->fixangle_angles_set = TRUE;
+               host_client->fixangle_angles_set = true;
 
                // and clear fixangle for the next frame
                PRVM_serveredictfloat(ent, fixangle) = 0;
@@ -3068,7 +3050,7 @@ static void SV_Physics_ClientEntity(prvm_edict_t *ent)
                SV_Physics_Pusher (ent);
                break;
        case MOVETYPE_NONE:
-               // LordHavoc: manually inlined the thinktime check here because MOVETYPE_NONE is used on so many objects
+               // LadyHavoc: manually inlined the thinktime check here because MOVETYPE_NONE is used on so many objects
                if (PRVM_serveredictfloat(ent, nextthink) > 0 && PRVM_serveredictfloat(ent, nextthink) <= sv.time + sv.frametime)
                        SV_RunThink (ent);
                break;
@@ -3148,6 +3130,9 @@ void SV_Physics (void)
        int i;
        prvm_edict_t *ent;
 
+       // free memory for resources that are no longer referenced
+       PRVM_GarbageCollection(prog);
+
 // let the progs know that a new frame has started
        PRVM_serverglobaledict(self) = PRVM_EDICT_TO_PROG(prog->edicts);
        PRVM_serverglobaledict(other) = PRVM_EDICT_TO_PROG(prog->edicts);
@@ -3155,8 +3140,10 @@ void SV_Physics (void)
        PRVM_serverglobalfloat(frametime) = sv.frametime;
        prog->ExecuteProgram(prog, PRVM_serverfunction(StartFrame), "QC function StartFrame is missing");
 
+#ifdef USEODE
        // run physics engine
        World_Physics_Frame(&sv.world, sv.frametime, sv_gravity.value);
+#endif
 
 //
 // treat each object in turn
@@ -3165,22 +3152,22 @@ void SV_Physics (void)
        // if force_retouch, relink all the entities
        if (PRVM_serverglobalfloat(force_retouch) > 0)
                for (i = 1, ent = PRVM_EDICT_NUM(i);i < prog->num_edicts;i++, ent = PRVM_NEXT_EDICT(ent))
-                       if (!ent->priv.server->free)
+                       if (!ent->free)
                                SV_LinkEdict_TouchAreaGrid(ent); // force retouch even for stationary
 
        if (sv_gameplayfix_consistentplayerprethink.integer)
        {
                // run physics on the client entities in 3 stages
                for (i = 1, ent = PRVM_EDICT_NUM(i), host_client = svs.clients;i <= svs.maxclients;i++, ent = PRVM_NEXT_EDICT(ent), host_client++)
-                       if (!ent->priv.server->free)
+                       if (!ent->free)
                                SV_Physics_ClientEntity_PreThink(ent);
 
                for (i = 1, ent = PRVM_EDICT_NUM(i), host_client = svs.clients;i <= svs.maxclients;i++, ent = PRVM_NEXT_EDICT(ent), host_client++)
-                       if (!ent->priv.server->free)
+                       if (!ent->free)
                                SV_Physics_ClientEntity(ent);
 
                for (i = 1, ent = PRVM_EDICT_NUM(i), host_client = svs.clients;i <= svs.maxclients;i++, ent = PRVM_NEXT_EDICT(ent), host_client++)
-                       if (!ent->priv.server->free)
+                       if (!ent->free)
                                SV_Physics_ClientEntity_PostThink(ent);
        }
        else
@@ -3188,7 +3175,7 @@ void SV_Physics (void)
                // run physics on the client entities
                for (i = 1, ent = PRVM_EDICT_NUM(i), host_client = svs.clients;i <= svs.maxclients;i++, ent = PRVM_NEXT_EDICT(ent), host_client++)
                {
-                       if (!ent->priv.server->free)
+                       if (!ent->free)
                        {
                                SV_Physics_ClientEntity_PreThink(ent);
                                SV_Physics_ClientEntity(ent);
@@ -3201,20 +3188,20 @@ void SV_Physics (void)
        if (!sv_freezenonclients.integer)
        {
                for (;i < prog->num_edicts;i++, ent = PRVM_NEXT_EDICT(ent))
-                       if (!ent->priv.server->free)
+                       if (!ent->free)
                                SV_Physics_Entity(ent);
                // make a second pass to see if any ents spawned this frame and make
                // sure they run their move/think
                if (sv_gameplayfix_delayprojectiles.integer < 0)
                        for (i = svs.maxclients + 1, ent = PRVM_EDICT_NUM(i);i < prog->num_edicts;i++, ent = PRVM_NEXT_EDICT(ent))
-                               if (!ent->priv.server->move && !ent->priv.server->free)
+                               if (!ent->priv.server->move && !ent->free)
                                        SV_Physics_Entity(ent);
        }
 
        if (PRVM_serverglobalfloat(force_retouch) > 0)
                PRVM_serverglobalfloat(force_retouch) = max(0, PRVM_serverglobalfloat(force_retouch) - 1);
 
-       // LordHavoc: endframe support
+       // LadyHavoc: endframe support
        if (PRVM_serverfunction(EndFrame))
        {
                PRVM_serverglobaledict(self) = PRVM_EDICT_TO_PROG(prog->edicts);