]> de.git.xonotic.org Git - xonotic/darkplaces.git/blobdiff - world.c
no time to explain, more changes on the path to q3bsp support
[xonotic/darkplaces.git] / world.c
diff --git a/world.c b/world.c
index ec9942e4d5f23d0b15877a4ee89f6abca378178e..373ac3e5d07424cce164c07f626daf7d6f56e9e8 100644 (file)
--- a/world.c
+++ b/world.c
@@ -8,7 +8,7 @@ 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.  
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 
 See the GNU General Public License for more details.
 
@@ -25,173 +25,76 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 
 entities never clip against themselves, or their owner
 
-line of sight checks trace->crosscontent, but bullets don't
+line of sight checks trace->inopen and trace->inwater, but bullets don't
 
 */
 
+cvar_t sv_debugmove = {CVAR_NOTIFY, "sv_debugmove", "0"};
+cvar_t sv_areagrid_mingridsize = {CVAR_NOTIFY, "sv_areagrid_mingridsize", "64"};
 
-typedef struct
-{
-       vec3_t          boxmins, boxmaxs;// enclose the test object along entire move
-       float           *mins, *maxs;   // size of the moving object
-       vec3_t          mins2, maxs2;   // size when clipping against mosnters
-       float           *start, *end;
-       trace_t         trace;
-       int                     type;
-       edict_t         *passedict;
-} moveclip_t;
-
+void SV_AreaStats_f(void);
 
-/*
-===============================================================================
+void SV_World_Init(void)
+{
+       Cvar_RegisterVariable(&sv_debugmove);
+       Cvar_RegisterVariable(&sv_areagrid_mingridsize);
+       Cmd_AddCommand("sv_areastats", SV_AreaStats_f);
+       Collision_Init();
+}
 
-HULL BOXES
+typedef struct
+{
+       // bounding box of entire move area
+       vec3_t boxmins, boxmaxs;
 
-===============================================================================
-*/
+       // size of the moving object
+       vec3_t mins, maxs;
 
+       // size when clipping against monsters
+       vec3_t mins2, maxs2;
 
-static hull_t          box_hull;
-static dclipnode_t     box_clipnodes[6];
-static mplane_t        box_planes[6];
+       // size when clipping against brush models
+       vec3_t hullmins, hullmaxs;
 
-/*
-===================
-SV_InitBoxHull
+       // start and end origin of move
+       vec3_t start, end;
 
-Set up the planes and clipnodes so that the six floats of a bounding box
-can just be stored out and get a proper hull_t structure.
-===================
-*/
-void SV_InitBoxHull (void)
-{
-       int             i;
-       int             side;
+       // trace results
+       trace_t trace;
 
-       box_hull.clipnodes = box_clipnodes;
-       box_hull.planes = box_planes;
-       box_hull.firstclipnode = 0;
-       box_hull.lastclipnode = 5;
+       // type of move (like ignoring monsters, or similar)
+       int type;
 
-       for (i=0 ; i<6 ; i++)
-       {
-               box_clipnodes[i].planenum = i;
-               
-               side = i&1;
-               
-               box_clipnodes[i].children[side] = CONTENTS_EMPTY;
-               if (i != 5)
-                       box_clipnodes[i].children[side^1] = i + 1;
-               else
-                       box_clipnodes[i].children[side^1] = CONTENTS_SOLID;
-               
-               box_planes[i].type = i>>1;
-               box_planes[i].normal[i>>1] = 1;
-       }
-       
+       // the edict that is moving (if any)
+       edict_t *passedict;
 }
+moveclip_t;
 
+//============================================================================
 
-/*
-===================
-SV_HullForBox
-
-To keep everything totally uniform, bounding boxes are turned into small
-BSP trees instead of being compared directly.
-===================
-*/
-hull_t *SV_HullForBox (vec3_t mins, vec3_t maxs)
+// ClearLink is used for new headnodes
+static void ClearLink (link_t *l)
 {
-       box_planes[0].dist = maxs[0];
-       box_planes[1].dist = mins[0];
-       box_planes[2].dist = maxs[1];
-       box_planes[3].dist = mins[1];
-       box_planes[4].dist = maxs[2];
-       box_planes[5].dist = mins[2];
-
-       return &box_hull;
+       l->entitynumber = 0;
+       l->prev = l->next = l;
 }
 
-
-
-/*
-================
-SV_HullForEntity
-
-Returns a hull that can be used for testing or clipping an object of mins/maxs
-size.
-Offset is filled in to contain the adjustment that must be added to the
-testing object's origin to get a point to use with the returned hull.
-================
-*/
-extern qboolean hlbsp;
-hull_t *SV_HullForEntity (edict_t *ent, vec3_t mins, vec3_t maxs, vec3_t offset)
+static void RemoveLink (link_t *l)
 {
-       model_t         *model;
-       vec3_t          size;
-       vec3_t          hullmins, hullmaxs;
-       hull_t          *hull;
-
-// decide which clipping hull to use, based on the size
-       if (ent->v.solid == SOLID_BSP)
-       {       // explicit hulls in the BSP model
-               if (ent->v.movetype != MOVETYPE_PUSH)
-                       Host_Error ("SOLID_BSP without MOVETYPE_PUSH");
-
-               model = sv.models[ (int)ent->v.modelindex ];
-
-               // LordHavoc: fixed SOLID_BSP error message
-               if (!model || model->type != mod_brush)
-               {
-                       Con_Printf ("SOLID_BSP with a non bsp model, entity dump:\n");
-                       ED_Print (ent);
-                       Host_Error ("SOLID_BSP with a non bsp model\n");
-               }
-
-               VectorSubtract (maxs, mins, size);
-               // LordHavoc: FIXME!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
-               if (hlbsp)
-               {
-                       if (size[0] < 3)
-                               hull = &model->hulls[0]; // 0x0x0
-                       else if (size[0] <= 32)
-                       {
-                               if (size[2] < 54) // pick the nearest of 36 or 72
-                                       hull = &model->hulls[3]; // 32x32x36
-                               else
-                                       hull = &model->hulls[1]; // 32x32x72
-                       }
-                       else
-                               hull = &model->hulls[2]; // 64x64x64
-               }
-               else
-               {
-                       if (size[0] < 3)
-                               hull = &model->hulls[0]; // 0x0x0
-                       else if (size[0] <= 32)
-                               hull = &model->hulls[1]; // 32x32x56
-                       else
-                               hull = &model->hulls[2]; // 64x64x88
-               }
-
-// calculate an offset value to center the origin
-               VectorSubtract (hull->clip_mins, mins, offset);
-               VectorAdd (offset, ent->v.origin, offset);
-       }
-       else
-       {       // create a temp hull from bounding box sizes
-
-               VectorSubtract (ent->v.mins, maxs, hullmins);
-               VectorSubtract (ent->v.maxs, mins, hullmaxs);
-               hull = SV_HullForBox (hullmins, hullmaxs);
-               
-               VectorCopy (ent->v.origin, offset);
-       }
-
+       l->next->prev = l->prev;
+       l->prev->next = l->next;
+}
 
-       return hull;
+static void InsertLinkBefore (link_t *l, link_t *before, int entitynumber)
+{
+       l->entitynumber = entitynumber;
+       l->next = before;
+       l->prev = before->prev;
+       l->prev->next = l;
+       l->next->prev = l;
 }
 
+
 /*
 ===============================================================================
 
@@ -200,64 +103,59 @@ ENTITY AREA CHECKING
 ===============================================================================
 */
 
-typedef struct areanode_s
+int sv_areagrid_stats_calls = 0;
+int sv_areagrid_stats_nodechecks = 0;
+int sv_areagrid_stats_entitychecks = 0;
+
+void SV_AreaStats_f(void)
 {
-       int             axis;           // -1 = leaf node
-       float   dist;
-       struct areanode_s       *children[2];
-       link_t  trigger_edicts;
-       link_t  solid_edicts;
-} areanode_t;
+       Con_Printf("areagrid check stats: %d calls %d nodes (%f per call) %d entities (%f per call)\n", sv_areagrid_stats_calls, sv_areagrid_stats_nodechecks, (double) sv_areagrid_stats_nodechecks / (double) sv_areagrid_stats_calls, sv_areagrid_stats_entitychecks, (double) sv_areagrid_stats_entitychecks / (double) sv_areagrid_stats_calls);
+       sv_areagrid_stats_calls = 0;
+       sv_areagrid_stats_nodechecks = 0;
+       sv_areagrid_stats_entitychecks = 0;
+}
 
-#define        AREA_DEPTH      4
-#define        AREA_NODES      32
+typedef struct areagrid_s
+{
+       link_t trigger_edicts;
+       link_t solid_edicts;
+}
+areagrid_t;
 
-static areanode_t      sv_areanodes[AREA_NODES];
-static int                     sv_numareanodes;
+#define AREA_GRID 512
+#define AREA_GRIDNODES (AREA_GRID * AREA_GRID)
 
-/*
-===============
-SV_CreateAreaNode
+static areagrid_t sv_areagrid[AREA_GRIDNODES], sv_areagrid_outside;
+static vec3_t sv_areagrid_bias, sv_areagrid_scale, sv_areagrid_mins, sv_areagrid_maxs, sv_areagrid_size;
+static int sv_areagrid_marknumber = 1;
 
-===============
-*/
-areanode_t *SV_CreateAreaNode (int depth, vec3_t mins, vec3_t maxs)
+void SV_CreateAreaGrid (vec3_t mins, vec3_t maxs)
 {
-       areanode_t      *anode;
-       vec3_t          size;
-       vec3_t          mins1, maxs1, mins2, maxs2;
-
-       anode = &sv_areanodes[sv_numareanodes];
-       sv_numareanodes++;
-
-       ClearLink (&anode->trigger_edicts);
-       ClearLink (&anode->solid_edicts);
-       
-       if (depth == AREA_DEPTH)
-       {
-               anode->axis = -1;
-               anode->children[0] = anode->children[1] = NULL;
-               return anode;
-       }
-       
-       VectorSubtract (maxs, mins, size);
-       if (size[0] > size[1])
-               anode->axis = 0;
-       else
-               anode->axis = 1;
-       
-       anode->dist = 0.5 * (maxs[anode->axis] + mins[anode->axis]);
-       VectorCopy (mins, mins1);       
-       VectorCopy (mins, mins2);       
-       VectorCopy (maxs, maxs1);       
-       VectorCopy (maxs, maxs2);       
-       
-       maxs1[anode->axis] = mins2[anode->axis] = anode->dist;
-       
-       anode->children[0] = SV_CreateAreaNode (depth+1, mins2, maxs2);
-       anode->children[1] = SV_CreateAreaNode (depth+1, mins1, maxs1);
-
-       return anode;
+       int i;
+       ClearLink (&sv_areagrid_outside.trigger_edicts);
+       ClearLink (&sv_areagrid_outside.solid_edicts);
+       // choose either the world box size, or a larger box to ensure the grid isn't too fine
+       sv_areagrid_size[0] = max(maxs[0] - mins[0], AREA_GRID * sv_areagrid_mingridsize.value);
+       sv_areagrid_size[1] = max(maxs[1] - mins[1], AREA_GRID * sv_areagrid_mingridsize.value);
+       sv_areagrid_size[2] = max(maxs[2] - mins[2], AREA_GRID * sv_areagrid_mingridsize.value);
+       // figure out the corners of such a box, centered at the center of the world box
+       sv_areagrid_mins[0] = (mins[0] + maxs[0] - sv_areagrid_size[0]) * 0.5f;
+       sv_areagrid_mins[1] = (mins[1] + maxs[1] - sv_areagrid_size[1]) * 0.5f;
+       sv_areagrid_mins[2] = (mins[2] + maxs[2] - sv_areagrid_size[2]) * 0.5f;
+       sv_areagrid_maxs[0] = (mins[0] + maxs[0] + sv_areagrid_size[0]) * 0.5f;
+       sv_areagrid_maxs[1] = (mins[1] + maxs[1] + sv_areagrid_size[1]) * 0.5f;
+       sv_areagrid_maxs[2] = (mins[2] + maxs[2] + sv_areagrid_size[2]) * 0.5f;
+       // now calculate the actual useful info from that
+       VectorNegate(sv_areagrid_mins, sv_areagrid_bias);
+       sv_areagrid_scale[0] = AREA_GRID / sv_areagrid_size[0];
+       sv_areagrid_scale[1] = AREA_GRID / sv_areagrid_size[1];
+       sv_areagrid_scale[2] = AREA_GRID / sv_areagrid_size[2];
+       for (i = 0;i < AREA_GRIDNODES;i++)
+       {
+               ClearLink (&sv_areagrid[i].trigger_edicts);
+               ClearLink (&sv_areagrid[i].solid_edicts);
+       }
+       Con_DPrintf("sv_areagrid settings: divisions %ix%ix1 : box %f %f %f : %f %f %f size %f %f %f grid %f %f %f (mingrid %f)\n", AREA_GRID, AREA_GRID, sv_areagrid_mins[0], sv_areagrid_mins[1], sv_areagrid_mins[2], sv_areagrid_maxs[0], sv_areagrid_maxs[1], sv_areagrid_maxs[2], sv_areagrid_size[0], sv_areagrid_size[1], sv_areagrid_size[2], 1.0f / sv_areagrid_scale[0], 1.0f / sv_areagrid_scale[1], 1.0f / sv_areagrid_scale[2], sv_areagrid_mingridsize.value);
 }
 
 /*
@@ -268,11 +166,8 @@ SV_ClearWorld
 */
 void SV_ClearWorld (void)
 {
-       SV_InitBoxHull ();
-       
-       memset (sv_areanodes, 0, sizeof(sv_areanodes));
-       sv_numareanodes = 0;
-       SV_CreateAreaNode (0, sv.worldmodel->mins, sv.worldmodel->maxs);
+       Mod_CheckLoaded(sv.worldmodel);
+       SV_CreateAreaGrid(sv.worldmodel->normalmins, sv.worldmodel->normalmaxs);
 }
 
 
@@ -284,40 +179,53 @@ SV_UnlinkEdict
 */
 void SV_UnlinkEdict (edict_t *ent)
 {
-       if (!ent->area.prev)
-               return;         // not linked in anywhere
-       RemoveLink (&ent->area);
-       ent->area.prev = ent->area.next = NULL;
+       int i;
+       for (i = 0;i < ENTITYGRIDAREAS;i++)
+       {
+               if (ent->e->areagrid[i].prev)
+               {
+                       RemoveLink (&ent->e->areagrid[i]);
+                       ent->e->areagrid[i].prev = ent->e->areagrid[i].next = NULL;
+               }
+       }
 }
 
 
-/*
-====================
-SV_TouchLinks
-====================
-*/
-void SV_TouchLinks ( edict_t *ent, areanode_t *node )
+void SV_TouchAreaGrid(edict_t *ent)
 {
-       link_t          *l, *next;
-       edict_t         *touch;
-       int                     old_self, old_other;
-
-loc0:
-// touch linked edicts
-       for (l = node->trigger_edicts.next ; l != &node->trigger_edicts ; l = next)
+       link_t *l, *next;
+       edict_t *touch;
+       areagrid_t *grid;
+       int old_self, old_other, igrid[3], igridmins[3], igridmaxs[3];
+
+       sv_areagrid_marknumber++;
+       igridmins[0] = (int) ((ent->v->absmin[0] + sv_areagrid_bias[0]) * sv_areagrid_scale[0]);
+       igridmins[1] = (int) ((ent->v->absmin[1] + sv_areagrid_bias[1]) * sv_areagrid_scale[1]);
+       //igridmins[2] = (int) ((ent->v->absmin[2] + sv_areagrid_bias[2]) * sv_areagrid_scale[2]);
+       igridmaxs[0] = (int) ((ent->v->absmax[0] + sv_areagrid_bias[0]) * sv_areagrid_scale[0]) + 1;
+       igridmaxs[1] = (int) ((ent->v->absmax[1] + sv_areagrid_bias[1]) * sv_areagrid_scale[1]) + 1;
+       //igridmaxs[2] = (int) ((ent->v->absmax[2] + sv_areagrid_bias[2]) * sv_areagrid_scale[2]) + 1;
+       igridmins[0] = max(0, igridmins[0]);
+       igridmins[1] = max(0, igridmins[1]);
+       //igridmins[2] = max(0, igridmins[2]);
+       igridmaxs[0] = min(AREA_GRID, igridmaxs[0]);
+       igridmaxs[1] = min(AREA_GRID, igridmaxs[1]);
+       //igridmaxs[2] = min(AREA_GRID, igridmaxs[2]);
+
+       for (l = sv_areagrid_outside.trigger_edicts.next;l != &sv_areagrid_outside.trigger_edicts;l = next)
        {
                next = l->next;
-               touch = EDICT_FROM_AREA(l);
-               if (touch == ent)
+               touch = EDICT_NUM(l->entitynumber);
+               if (ent->v->absmin[0] > touch->v->absmax[0]
+                || ent->v->absmax[0] < touch->v->absmin[0]
+                || ent->v->absmin[1] > touch->v->absmax[1]
+                || ent->v->absmax[1] < touch->v->absmin[1]
+                || ent->v->absmin[2] > touch->v->absmax[2]
+                || ent->v->absmax[2] < touch->v->absmin[2])
                        continue;
-               if (!touch->v.touch || touch->v.solid != SOLID_TRIGGER)
+               if (touch == ent)
                        continue;
-               if (ent->v.absmin[0] > touch->v.absmax[0]
-               || ent->v.absmin[1] > touch->v.absmax[1]
-               || ent->v.absmin[2] > touch->v.absmax[2]
-               || ent->v.absmax[0] < touch->v.absmin[0]
-               || ent->v.absmax[1] < touch->v.absmin[1]
-               || ent->v.absmax[2] < touch->v.absmin[2] )
+               if (!touch->v->touch || touch->v->solid != SOLID_TRIGGER)
                        continue;
                old_self = pr_global_struct->self;
                old_other = pr_global_struct->other;
@@ -325,94 +233,86 @@ loc0:
                pr_global_struct->self = EDICT_TO_PROG(touch);
                pr_global_struct->other = EDICT_TO_PROG(ent);
                pr_global_struct->time = sv.time;
-               PR_ExecuteProgram (touch->v.touch);
+               PR_ExecuteProgram (touch->v->touch, "");
 
                pr_global_struct->self = old_self;
                pr_global_struct->other = old_other;
        }
-       
-// recurse down both sides
-       if (node->axis == -1)
-               return;
-       
-       // LordHavoc: optimized recursion
-//     if (ent->v.absmax[node->axis] > node->dist) SV_TouchLinks (ent, node->children[0]);
-//     if (ent->v.absmin[node->axis] < node->dist) SV_TouchLinks (ent, node->children[1]);
-       if (ent->v.absmax[node->axis] > node->dist)
-       {
-               if (ent->v.absmin[node->axis] < node->dist)
-                       SV_TouchLinks(ent, node->children[1]); // order reversed to reduce code
-               node = node->children[0];
-               goto loc0;
-       }
-       else
+
+       for (igrid[1] = igridmins[1];igrid[1] < igridmaxs[1];igrid[1]++)
        {
-               if (ent->v.absmin[node->axis] < node->dist)
+               grid = sv_areagrid + igrid[1] * AREA_GRID + igridmins[0];
+               for (igrid[0] = igridmins[0];igrid[0] < igridmaxs[0];igrid[0]++, grid++)
                {
-                       node = node->children[1];
-                       goto loc0;
+                       for (l = grid->trigger_edicts.next;l != &grid->trigger_edicts;l = next)
+                       {
+                               next = l->next;
+                               touch = EDICT_NUM(l->entitynumber);
+                               if (touch->e->areagridmarknumber == sv_areagrid_marknumber)
+                                       continue;
+                               touch->e->areagridmarknumber = sv_areagrid_marknumber;
+                               if (ent->v->absmin[0] > touch->v->absmax[0]
+                                || ent->v->absmax[0] < touch->v->absmin[0]
+                                || ent->v->absmin[1] > touch->v->absmax[1]
+                                || ent->v->absmax[1] < touch->v->absmin[1]
+                                || ent->v->absmin[2] > touch->v->absmax[2]
+                                || ent->v->absmax[2] < touch->v->absmin[2])
+                                       continue;
+                               // LordHavoc: id bug that won't be fixed: triggers do not ignore their owner like solid objects do
+                               if (touch == ent)
+                                       continue;
+                               if (!touch->v->touch || touch->v->solid != SOLID_TRIGGER)
+                                       continue;
+                               old_self = pr_global_struct->self;
+                               old_other = pr_global_struct->other;
+
+                               pr_global_struct->self = EDICT_TO_PROG(touch);
+                               pr_global_struct->other = EDICT_TO_PROG(ent);
+                               pr_global_struct->time = sv.time;
+                               PR_ExecuteProgram (touch->v->touch, "");
+
+                               pr_global_struct->self = old_self;
+                               pr_global_struct->other = old_other;
+                       }
                }
        }
 }
 
-
-/*
-===============
-SV_FindTouchedLeafs
-
-===============
-*/
-void SV_FindTouchedLeafs (edict_t *ent, mnode_t *node)
+void SV_LinkEdict_AreaGrid(edict_t *ent)
 {
-       mplane_t        *splitplane;
-       mleaf_t         *leaf;
-       int                     sides;
-       int                     leafnum;
-
-loc0:
-       if (node->contents == CONTENTS_SOLID)
+       areagrid_t *grid;
+       int igrid[3], igridmins[3], igridmaxs[3], gridnum, entitynumber = NUM_FOR_EDICT(ent);
+
+       if (entitynumber <= 0 || entitynumber >= sv.max_edicts || EDICT_NUM(entitynumber) != ent)
+               Host_Error("SV_LinkEdict_AreaGrid: invalid edict %p (sv.edicts is %p, edict compared to sv.edicts is %i)\n", ent, sv.edicts, entitynumber);
+
+       igridmins[0] = (int) ((ent->v->absmin[0] + sv_areagrid_bias[0]) * sv_areagrid_scale[0]);
+       igridmins[1] = (int) ((ent->v->absmin[1] + sv_areagrid_bias[1]) * sv_areagrid_scale[1]);
+       //igridmins[2] = (int) ((ent->v->absmin[2] + sv_areagrid_bias[2]) * sv_areagrid_scale[2]);
+       igridmaxs[0] = (int) ((ent->v->absmax[0] + sv_areagrid_bias[0]) * sv_areagrid_scale[0]) + 1;
+       igridmaxs[1] = (int) ((ent->v->absmax[1] + sv_areagrid_bias[1]) * sv_areagrid_scale[1]) + 1;
+       //igridmaxs[2] = (int) ((ent->v->absmax[2] + sv_areagrid_bias[2]) * sv_areagrid_scale[2]) + 1;
+       if (igridmins[0] < 0 || igridmaxs[0] > AREA_GRID || igridmins[1] < 0 || igridmaxs[1] > AREA_GRID || ((igridmaxs[0] - igridmins[0]) * (igridmaxs[1] - igridmins[1])) > ENTITYGRIDAREAS)
+       {
+               // wow, something outside the grid, store it as such
+               if (ent->v->solid == SOLID_TRIGGER)
+                       InsertLinkBefore (&ent->e->areagrid[0], &sv_areagrid_outside.trigger_edicts, entitynumber);
+               else
+                       InsertLinkBefore (&ent->e->areagrid[0], &sv_areagrid_outside.solid_edicts, entitynumber);
                return;
-       
-// add an efrag if the node is a leaf
+       }
 
-       if ( node->contents < 0)
+       gridnum = 0;
+       for (igrid[1] = igridmins[1];igrid[1] < igridmaxs[1];igrid[1]++)
        {
-               if (ent->num_leafs == MAX_ENT_LEAFS)
+               grid = sv_areagrid + igrid[1] * AREA_GRID + igridmins[0];
+               for (igrid[0] = igridmins[0];igrid[0] < igridmaxs[0];igrid[0]++, grid++, gridnum++)
                {
-                       Con_DPrintf("FindTouchedLeafs overflow\n");
-                       return;
+                       if (ent->v->solid == SOLID_TRIGGER)
+                               InsertLinkBefore (&ent->e->areagrid[gridnum], &grid->trigger_edicts, entitynumber);
+                       else
+                               InsertLinkBefore (&ent->e->areagrid[gridnum], &grid->solid_edicts, entitynumber);
                }
-
-               leaf = (mleaf_t *)node;
-               leafnum = leaf - sv.worldmodel->leafs - 1;
-
-               ent->leafnums[ent->num_leafs] = leafnum;
-               ent->num_leafs++;                       
-               return;
-       }
-       
-// NODE_MIXED
-
-       splitplane = node->plane;
-       sides = BOX_ON_PLANE_SIDE(ent->v.absmin, ent->v.absmax, splitplane);
-       
-// recurse down the contacted sides
-       // LordHavoc: optimized recursion
-//     if (sides & 1) SV_FindTouchedLeafs (ent, node->children[0]);
-//     if (sides & 2) SV_FindTouchedLeafs (ent, node->children[1]);
-       switch (sides)
-       {
-       case 1:
-               node = node->children[0];
-               goto loc0;
-       case 2:
-               node = node->children[1];
-               goto loc0;
-       default: // 3
-               if (node->children[0]->contents != CONTENTS_SOLID)
-                       SV_FindTouchedLeafs (ent, node->children[0]);
-               node = node->children[1];
-               goto loc0;
        }
 }
 
@@ -424,108 +324,92 @@ SV_LinkEdict
 */
 void SV_LinkEdict (edict_t *ent, qboolean touch_triggers)
 {
-       areanode_t      *node;
+       model_t *model;
 
-       if (ent->area.prev)
+       if (ent->e->areagrid[0].prev)
                SV_UnlinkEdict (ent);   // unlink from old position
-               
+
        if (ent == sv.edicts)
                return;         // don't add the world
 
-       if (ent->free)
+       if (ent->e->free)
                return;
 
 // set the abs box
 
-// LordHavoc: enabling rotating bmodels
-       if (ent->v.solid == SOLID_BSP && (ent->v.angles[0] || ent->v.angles[1] || ent->v.angles[2]))
-       {       // expand for rotation
-               float           max, v;
-               int                     i;
-
-               max = DotProduct(ent->v.mins, ent->v.mins);
-               v = DotProduct(ent->v.maxs, ent->v.maxs);
-               if (max < v)
-                       max = v;
-               max = sqrt(max);
-               /*
-               max = 0;
-               for (i=0 ; i<3 ; i++)
+       if (ent->v->solid == SOLID_BSP)
+       {
+               if (ent->v->modelindex < 0 || ent->v->modelindex > MAX_MODELS)
+                       Host_Error("SOLID_BSP with invalid modelindex!\n");
+               model = sv.models[(int) ent->v->modelindex];
+               if (model != NULL)
                {
-                       v = fabs(ent->v.mins[i]);
-                       if (max < v)
-                               max = v;
-                       v = fabs(ent->v.maxs[i]);
-                       if (max < v)
-                               max = v;
+                       Mod_CheckLoaded(model);
+                       if (model->type != mod_brush)
+                               Host_Error("SOLID_BSP with non-BSP model\n");
+
+                       if (ent->v->angles[0] || ent->v->angles[2] || ent->v->avelocity[0] || ent->v->avelocity[2])
+                       {
+                               VectorAdd(ent->v->origin, model->rotatedmins, ent->v->absmin);
+                               VectorAdd(ent->v->origin, model->rotatedmaxs, ent->v->absmax);
+                       }
+                       else if (ent->v->angles[1] || ent->v->avelocity[1])
+                       {
+                               VectorAdd(ent->v->origin, model->yawmins, ent->v->absmin);
+                               VectorAdd(ent->v->origin, model->yawmaxs, ent->v->absmax);
+                       }
+                       else
+                       {
+                               VectorAdd(ent->v->origin, model->normalmins, ent->v->absmin);
+                               VectorAdd(ent->v->origin, model->normalmaxs, ent->v->absmax);
+                       }
                }
-               */
-               for (i=0 ; i<3 ; i++)
+               else
                {
-                       ent->v.absmin[i] = ent->v.origin[i] - max;
-                       ent->v.absmax[i] = ent->v.origin[i] + max;
+                       // SOLID_BSP with no model is valid, mainly because some QC setup code does so temporarily
+                       VectorAdd(ent->v->origin, ent->v->mins, ent->v->absmin);
+                       VectorAdd(ent->v->origin, ent->v->maxs, ent->v->absmax);
                }
        }
        else
        {
-               VectorAdd (ent->v.origin, ent->v.mins, ent->v.absmin);  
-               VectorAdd (ent->v.origin, ent->v.maxs, ent->v.absmax);
+               VectorAdd(ent->v->origin, ent->v->mins, ent->v->absmin);
+               VectorAdd(ent->v->origin, ent->v->maxs, ent->v->absmax);
        }
 
 //
 // to make items easier to pick up and allow them to be grabbed off
 // of shelves, the abs sizes are expanded
 //
-       if ((int)ent->v.flags & FL_ITEM)
+       if ((int)ent->v->flags & FL_ITEM)
        {
-               ent->v.absmin[0] -= 15;
-               ent->v.absmin[1] -= 15;
-               ent->v.absmax[0] += 15;
-               ent->v.absmax[1] += 15;
+               ent->v->absmin[0] -= 15;
+               ent->v->absmin[1] -= 15;
+               ent->v->absmin[2] -= 1;
+               ent->v->absmax[0] += 15;
+               ent->v->absmax[1] += 15;
+               ent->v->absmax[2] += 1;
        }
        else
-       {       // because movement is clipped an epsilon away from an actual edge,
+       {
+               // because movement is clipped an epsilon away from an actual edge,
                // we must fully check even when bounding boxes don't quite touch
-               ent->v.absmin[0] -= 1;
-               ent->v.absmin[1] -= 1;
-               ent->v.absmin[2] -= 1;
-               ent->v.absmax[0] += 1;
-               ent->v.absmax[1] += 1;
-               ent->v.absmax[2] += 1;
+               ent->v->absmin[0] -= 1;
+               ent->v->absmin[1] -= 1;
+               ent->v->absmin[2] -= 1;
+               ent->v->absmax[0] += 1;
+               ent->v->absmax[1] += 1;
+               ent->v->absmax[2] += 1;
        }
 
-// link to PVS leafs
-       ent->num_leafs = 0;
-       if (ent->v.modelindex)
-               SV_FindTouchedLeafs (ent, sv.worldmodel->nodes);
-
-       if (ent->v.solid == SOLID_NOT)
+       if (ent->v->solid == SOLID_NOT)
                return;
 
-// find the first node that the ent's box crosses
-       node = sv_areanodes;
-       while (1)
-       {
-               if (node->axis == -1)
-                       break;
-               if (ent->v.absmin[node->axis] > node->dist)
-                       node = node->children[0];
-               else if (ent->v.absmax[node->axis] < node->dist)
-                       node = node->children[1];
-               else
-                       break;          // crosses the node
-       }
-
-// link it in  
+       SV_LinkEdict_AreaGrid(ent);
 
-       if (ent->v.solid == SOLID_TRIGGER)
-               InsertLinkBefore (&ent->area, &node->trigger_edicts);
-       else
-               InsertLinkBefore (&ent->area, &node->solid_edicts);
-       
 // if touch_triggers, touch all entities at this node and descend for more
        if (touch_triggers)
-               SV_TouchLinks ( ent, sv_areanodes );
+               SV_TouchAreaGrid(ent);
 }
 
 
@@ -538,8 +422,6 @@ POINT TESTING IN HULLS
 ===============================================================================
 */
 
-// SV_HullPointContents moved to cpu_noasm.c
-
 /*
 ============
 SV_TestEntityPosition
@@ -547,16 +429,9 @@ SV_TestEntityPosition
 This could be a lot more efficient...
 ============
 */
-edict_t        *SV_TestEntityPosition (edict_t *ent)
+int SV_TestEntityPosition (edict_t *ent)
 {
-       trace_t trace;
-
-       trace = SV_Move (ent->v.origin, ent->v.mins, ent->v.maxs, ent->v.origin, 0, ent);
-       
-       if (trace.startsolid)
-               return sv.edicts;
-               
-       return NULL;
+       return SV_Move (ent->v->origin, ent->v->mins, ent->v->maxs, ent->v->origin, MOVE_NORMAL, ent).startsolid;
 }
 
 
@@ -568,344 +443,6 @@ LINE TESTING IN HULLS
 ===============================================================================
 */
 
-// 1/32 epsilon to keep floating point happy
-#define        DIST_EPSILON    (0.03125)
-
-/*
-==================
-SV_RecursiveHullCheck
-
-==================
-*/
-/*
-qboolean SV_RecursiveHullCheck (hull_t *hull, int num, float p1f, float p2f, vec3_t p1, vec3_t p2, trace_t *trace)
-{
-       dclipnode_t     *node;
-       mplane_t        *plane;
-       float           t1, t2;
-       float           frac;
-       int                     i;
-       vec3_t          mid;
-       int                     side;
-       float           midf;
-
-loc0:
-// check for empty
-       if (num < 0)
-       {
-               if (num != CONTENTS_SOLID)
-               {
-                       trace->allsolid = false;
-                       if (num == CONTENTS_EMPTY)
-                               trace->inopen = true;
-                       else
-                               trace->inwater = true;
-               }
-               else
-                       trace->startsolid = true;
-               return true;            // empty
-       }
-
-       if (num < hull->firstclipnode || num > hull->lastclipnode)
-               Sys_Error ("SV_RecursiveHullCheck: bad node number");
-
-//
-// find the point distances
-//
-       node = hull->clipnodes + num;
-       plane = hull->planes + node->planenum;
-
-       t1 = PlaneDiff(p1, plane);
-       t2 = PlaneDiff(p2, plane);
-       
-#if 1
-       if (t1 >= 0 && t2 >= 0)
-       // LordHavoc: optimized recursion
-//             return SV_RecursiveHullCheck (hull, node->children[0], p1f, p2f, p1, p2, trace);
-       {
-               num = node->children[0];
-               goto loc0;
-       }
-       if (t1 < 0 && t2 < 0)
-//             return SV_RecursiveHullCheck (hull, node->children[1], p1f, p2f, p1, p2, trace);
-       {
-               num = node->children[1];
-               goto loc0;
-       }
-#else
-       if ( (t1 >= DIST_EPSILON && t2 >= DIST_EPSILON) || (t2 > t1 && t1 >= 0) )
-               return SV_RecursiveHullCheck (hull, node->children[0], p1f, p2f, p1, p2, trace);
-       if ( (t1 <= -DIST_EPSILON && t2 <= -DIST_EPSILON) || (t2 < t1 && t1 <= 0) )
-               return SV_RecursiveHullCheck (hull, node->children[1], p1f, p2f, p1, p2, trace);
-#endif
-
-// put the crosspoint DIST_EPSILON pixels on the near side
-       if (t1 < 0)
-               frac = bound(0, (t1 + DIST_EPSILON)/(t1-t2), 1);
-       else
-               frac = bound(0, (t1 - DIST_EPSILON)/(t1-t2), 1);
-               
-       midf = p1f + (p2f - p1f)*frac;
-       mid[0] = p1[0] + frac*(p2[0] - p1[0]);
-       mid[1] = p1[1] + frac*(p2[1] - p1[1]);
-       mid[2] = p1[2] + frac*(p2[2] - p1[2]);
-
-       side = (t1 < 0);
-
-// move up to the node
-       if (!SV_RecursiveHullCheck (hull, node->children[side], p1f, midf, p1, mid, trace) )
-               return false;
-
-#ifdef PARANOID
-       if (SV_HullPointContents (hull, node->children[side], mid) == CONTENTS_SOLID)
-       {
-               Con_Printf ("mid PointInHullSolid\n");
-               return false;
-       }
-#endif
-
-       if (SV_HullPointContents (hull, node->children[side^1], mid) != CONTENTS_SOLID)
-// go past the node
-               return SV_RecursiveHullCheck (hull, node->children[side^1], midf, p2f, mid, p2, trace);
-       // mid would need to be duplicated during recursion...
-*/
-       /*
-       {
-               p1f = midf;
-               p1 = mid;
-               num = node->children[side^1];
-               goto loc0;
-       }
-       */
-/*
-
-       if (trace->allsolid)
-               return false;           // never got out of the solid area
-       
-//==================
-// the other side of the node is solid, this is the impact point
-//==================
-       if (!side)
-       {
-               VectorCopy (plane->normal, trace->plane.normal);
-               trace->plane.dist = plane->dist;
-       }
-       else
-       {
-               VectorNegate (plane->normal, trace->plane.normal);
-               trace->plane.dist = -plane->dist;
-       }
-
-       while (SV_HullPointContents (hull, hull->firstclipnode, mid) == CONTENTS_SOLID)
-       { // shouldn't really happen, but does occasionally
-               frac -= 0.1;
-               if (frac < 0)
-               {
-                       trace->fraction = midf;
-                       VectorCopy (mid, trace->endpos);
-                       Con_DPrintf ("backup past 0\n");
-                       return false;
-               }
-               midf = p1f + (p2f - p1f)*frac;
-               for (i=0 ; i<3 ; i++)
-                       mid[i] = p1[i] + frac*(p2[i] - p1[i]);
-       }
-
-       trace->fraction = midf;
-       VectorCopy (mid, trace->endpos);
-
-       return false;
-}
-*/
-
-// LordHavoc: backported from my optimizations to PM_RecursiveHullCheck in QuakeForge newtree (QW)
-qboolean SV_RecursiveHullCheck (hull_t *hull, int num, float p1f, float p2f, vec3_t p1, vec3_t p2, trace_t *trace)
-{
-       dclipnode_t     *node;
-       mplane_t        *plane;
-       float           t1, t2;
-       float           frac;
-       int                     i;
-       vec3_t          mid;
-       int                     side;
-       float           midf;
-
-       // LordHavoc: a goto!  everyone flee in terror... :)
-loc0:
-// check for empty
-       if (num < 0)
-       {
-               if (num != CONTENTS_SOLID)
-               {
-                       trace->allsolid = false;
-                       if (num == CONTENTS_EMPTY)
-                               trace->inopen = true;
-                       else
-                               trace->inwater = true;
-               }
-               else
-                       trace->startsolid = true;
-               return true;            // empty
-       }
-
-       // LordHavoc: this can be eliminated by validating in the loader...  but Mercury told me not to bother
-       if (num < hull->firstclipnode || num > hull->lastclipnode)
-               Sys_Error ("SV_RecursiveHullCheck: bad node number");
-
-// find the point distances
-       node = hull->clipnodes + num;
-       plane = hull->planes + node->planenum;
-
-       if (plane->type < 3)
-       {
-               t1 = p1[plane->type] - plane->dist;
-               t2 = p2[plane->type] - plane->dist;
-       }
-       else
-       {
-               t1 = DotProduct (plane->normal, p1) - plane->dist;
-               t2 = DotProduct (plane->normal, p2) - plane->dist;
-       }
-
-       // LordHavoc: recursion optimization
-       if (t1 >= 0 && t2 >= 0)
-       {
-               num = node->children[0];
-               goto loc0;
-       }
-       if (t1 < 0 && t2 < 0)
-       {
-               num = node->children[1];
-               goto loc0;
-       }
-
-// put the crosspoint DIST_EPSILON pixels on the near side
-       side = (t1 < 0);
-       if (side)
-               frac = bound(0, (t1 + DIST_EPSILON) / (t1 - t2), 1);
-       else
-               frac = bound(0, (t1 - DIST_EPSILON) / (t1 - t2), 1);
-               
-       midf = p1f + (p2f - p1f)*frac;
-       for (i=0 ; i<3 ; i++)
-               mid[i] = p1[i] + frac*(p2[i] - p1[i]);
-
-// move up to the node
-       if (!SV_RecursiveHullCheck (hull, node->children[side], p1f, midf, p1, mid, trace) )
-               return false;
-
-#ifdef PARANOID
-       if (SV_HullPointContents (pm_hullmodel, mid, node->children[side]) == CONTENTS_SOLID)
-       {
-               Con_Printf ("mid PointInHullSolid\n");
-               return false;
-       }
-#endif
-
-       // LordHavoc: warning to the clumsy, this recursion can not be optimized because mid would need to be duplicated on a stack
-       if (SV_HullPointContents (hull, node->children[side^1], mid) != CONTENTS_SOLID)
-// go past the node
-               return SV_RecursiveHullCheck (hull, node->children[side^1], midf, p2f, mid, p2, trace);
-       
-       if (trace->allsolid)
-               return false;           // never got out of the solid area
-               
-//==================
-// the other side of the node is solid, this is the impact point
-//==================
-       if (!side)
-       {
-               VectorCopy (plane->normal, trace->plane.normal);
-               trace->plane.dist = plane->dist;
-       }
-       else
-       {
-               VectorNegate (plane->normal, trace->plane.normal);
-               trace->plane.dist = -plane->dist;
-       }
-
-       while (SV_HullPointContents (hull, hull->firstclipnode, mid) == CONTENTS_SOLID)
-       { // shouldn't really happen, but does occasionally
-               frac -= 0.1;
-               if (frac < 0)
-               {
-                       trace->fraction = midf;
-                       VectorCopy (mid, trace->endpos);
-                       Con_DPrintf ("backup past 0\n");
-                       return false;
-               }
-               midf = p1f + (p2f - p1f)*frac;
-               for (i=0 ; i<3 ; i++)
-                       mid[i] = p1[i] + frac*(p2[i] - p1[i]);
-       }
-
-       trace->fraction = midf;
-       VectorCopy (mid, trace->endpos);
-
-       return false;
-}
-
-qboolean SV_TestLine (hull_t *hull, int num, vec3_t p1, vec3_t p2)
-{
-       dclipnode_t     *node;
-       mplane_t        *plane;
-       float           t1, t2, frac;
-       vec3_t          mid;
-       int                     side;
-
-loc0:
-// check for empty
-       if (num < 0)
-               return num != CONTENTS_SOLID;
-
-       if (num < hull->firstclipnode || num > hull->lastclipnode)
-               Sys_Error ("SV_RecursiveHullCheck: bad node number");
-
-//
-// find the point distances
-//
-       node = hull->clipnodes + num;
-       plane = hull->planes + node->planenum;
-
-       t1 = PlaneDiff(p1, plane);
-       t2 = PlaneDiff(p2, plane);
-       
-       if (t1 >= 0 && t2 >= 0)
-       {
-               num = node->children[0];
-               goto loc0;
-       }
-       if (t1 < 0 && t2 < 0)
-       {
-               num = node->children[1];
-               goto loc0;
-       }
-
-// put the crosspoint DIST_EPSILON pixels on the near side
-       side = (t1 < 0);
-
-       if (side)
-               frac = bound(0, (t1 + DIST_EPSILON)/(t1-t2), 1);
-       else
-               frac = bound(0, (t1 - DIST_EPSILON)/(t1-t2), 1);
-               
-       mid[0] = p1[0] + frac*(p2[0] - p1[0]);
-       mid[1] = p1[1] + frac*(p2[1] - p1[1]);
-       mid[2] = p1[2] + frac*(p2[2] - p1[2]);
-
-       if (node->children[side] < 0)
-       {
-               if (node->children[side] == CONTENTS_SOLID)
-                       return false;
-               return SV_TestLine(hull, node->children[!side], mid, p2);
-       }
-       else if (SV_TestLine(hull, node->children[side], p1, mid))
-               return SV_TestLine(hull, node->children[!side], mid, p2);
-       else
-               return false;
-}
-
-
 /*
 ==================
 SV_ClipMoveToEntity
@@ -914,212 +451,153 @@ Handles selection or creation of a clipping hull, and offseting (and
 eventually rotation) of the end points
 ==================
 */
-trace_t SV_ClipMoveToEntity (edict_t *ent, vec3_t start, vec3_t mins, vec3_t maxs, vec3_t end)
+trace_t SV_ClipMoveToEntity(edict_t *ent, const vec3_t start, const vec3_t mins, const vec3_t maxs, const vec3_t end)
 {
-       trace_t         trace;
-       vec3_t          offset;
-       vec3_t          start_l, end_l;
-       hull_t          *hull;
-
-// fill in a default trace
-       memset (&trace, 0, sizeof(trace_t));
-       trace.fraction = 1;
-       trace.allsolid = true;
-       VectorCopy (end, trace.endpos);
-
-// get the clipping hull
-       hull = SV_HullForEntity (ent, mins, maxs, offset);
-
-       VectorSubtract (start, offset, start_l);
-       VectorSubtract (end, offset, end_l);
-
-// LordHavoc: enabling rotating bmodels
-       // rotate start and end into the models frame of reference
-       if (ent->v.solid == SOLID_BSP && (ent->v.angles[0] || ent->v.angles[1] || ent->v.angles[2]))
-       {
-               vec3_t  forward, right, up;
-               vec3_t  temp;
-
-               AngleVectors (ent->v.angles, forward, right, up);
-
-               VectorCopy (start_l, temp);
-               start_l[0] = DotProduct (temp, forward);
-               start_l[1] = -DotProduct (temp, right);
-               start_l[2] = DotProduct (temp, up);
-
-               VectorCopy (end_l, temp);
-               end_l[0] = DotProduct (temp, forward);
-               end_l[1] = -DotProduct (temp, right);
-               end_l[2] = DotProduct (temp, up);
-       }
-
-// trace a line through the apropriate clipping hull
-       SV_RecursiveHullCheck (hull, hull->firstclipnode, 0, 1, start_l, end_l, &trace);
-
-// LordHavoc: enabling rotating bmodels
-       // rotate endpos back to world frame of reference
-       if (ent->v.solid == SOLID_BSP && (ent->v.angles[0] || ent->v.angles[1] || ent->v.angles[2]))
-       {
-               vec3_t  a;
-               vec3_t  forward, right, up;
-               vec3_t  temp;
-
-               if (trace.fraction != 1)
+       int i;
+       trace_t trace;
+       model_t *model = NULL;
+       matrix4x4_t matrix, imatrix;
+       float tempnormal[3], starttransformed[3], endtransformed[3];
+       float starttransformedmins[3], starttransformedmaxs[3], endtransformedmins[3], endtransformedmaxs[3];
+
+       if ((int) ent->v->solid == SOLID_BSP)
+       {
+               i = ent->v->modelindex;
+               if ((unsigned int) i >= MAX_MODELS)
+                       Host_Error("SV_ClipMoveToEntity: invalid modelindex\n");
+               model = sv.models[i];
+               if (i != 0 && model == NULL)
+                       Host_Error("SV_ClipMoveToEntity: invalid modelindex\n");
+
+               Mod_CheckLoaded(model);
+               if (model->type != mod_brush)
                {
-                       VectorNegate (ent->v.angles, a);
-                       AngleVectors (a, forward, right, up);
-
-                       VectorCopy (trace.endpos, temp);
-                       trace.endpos[0] = DotProduct (temp, forward);
-                       trace.endpos[1] = -DotProduct (temp, right);
-                       trace.endpos[2] = DotProduct (temp, up);
-
-                       VectorCopy (trace.plane.normal, temp);
-                       trace.plane.normal[0] = DotProduct (temp, forward);
-                       trace.plane.normal[1] = -DotProduct (temp, right);
-                       trace.plane.normal[2] = DotProduct (temp, up);
+                       Con_Printf ("SV_ClipMoveToEntity: SOLID_BSP with a non bsp model, entity dump:\n");
+                       ED_Print (ent);
+                       Host_Error ("SV_ClipMoveToEntity: SOLID_BSP with a non bsp model\n");
                }
+               if (ent->v->movetype != MOVETYPE_PUSH)
+                       Host_Error ("SV_ClipMoveToEntity: SOLID_BSP without MOVETYPE_PUSH");
        }
 
-// fix trace up by the offset
-       if (trace.fraction != 1)
-               VectorAdd (trace.endpos, offset, trace.endpos);
+       Matrix4x4_CreateFromQuakeEntity(&matrix, ent->v->origin[0], ent->v->origin[1], ent->v->origin[2], ent->v->angles[0], ent->v->angles[1], ent->v->angles[2], 1);
+       Matrix4x4_Invert_Simple(&imatrix, &matrix);
+       Matrix4x4_Transform(&imatrix, start, starttransformed);
+       Matrix4x4_Transform(&imatrix, end, endtransformed);
+       VectorAdd(starttransformed, maxs, starttransformedmaxs);
+       VectorAdd(endtransformed, maxs, endtransformedmaxs);
+       VectorAdd(starttransformed, mins, starttransformedmins);
+       VectorAdd(endtransformed, mins, endtransformedmins);
 
-// did we clip the move?
-       if (trace.fraction < 1 || trace.startsolid  )
+       if (model && model->brush.TraceBox)
+               model->brush.TraceBox(model, &trace, starttransformedmins, starttransformedmaxs, endtransformedmins, endtransformedmaxs);
+       else
+               Collision_ClipTrace_Box(&trace, ent->v->mins, ent->v->maxs, starttransformed, mins, maxs, endtransformed);
+
+       if (trace.fraction < 1 || trace.startsolid)
                trace.ent = ent;
+       VectorLerp(start, trace.fraction, end, trace.endpos);
+       VectorCopy(trace.plane.normal, tempnormal);
+       Matrix4x4_Transform3x3(&matrix, tempnormal, trace.plane.normal);
+       // FIXME: should recalc trace.plane.dist
 
        return trace;
 }
 
 //===========================================================================
 
-/*
-====================
-SV_ClipToLinks
-
-Mins and maxs enclose the entire area swept by the move
-====================
-*/
-void SV_ClipToLinks ( areanode_t *node, moveclip_t *clip )
+void SV_ClipToNode(moveclip_t *clip, link_t *list)
 {
-       link_t          *l, *next;
-       edict_t         *touch;
-       trace_t         trace;
+       link_t *l, *next;
+       edict_t *touch;
+       trace_t trace;
 
-loc0:
-// touch linked edicts
-       for (l = node->solid_edicts.next ; l != &node->solid_edicts ; l = next)
+       sv_areagrid_stats_nodechecks++;
+       for (l = list->next;l != list;l = next)
        {
                next = l->next;
-               touch = EDICT_FROM_AREA(l);
-               if (touch->v.solid == SOLID_NOT)
+               touch = EDICT_NUM(l->entitynumber);
+               if (touch->e->areagridmarknumber == sv_areagrid_marknumber)
                        continue;
-               if (touch == clip->passedict)
+               touch->e->areagridmarknumber = sv_areagrid_marknumber;
+               sv_areagrid_stats_entitychecks++;
+
+               if (clip->boxmins[0] > touch->v->absmax[0]
+                || clip->boxmaxs[0] < touch->v->absmin[0]
+                || clip->boxmins[1] > touch->v->absmax[1]
+                || clip->boxmaxs[1] < touch->v->absmin[1]
+                || clip->boxmins[2] > touch->v->absmax[2]
+                || clip->boxmaxs[2] < touch->v->absmin[2])
                        continue;
-               if (touch->v.solid == SOLID_TRIGGER)
-                       Sys_Error ("Trigger in clipping list");
 
-               if (clip->type == MOVE_NOMONSTERS && touch->v.solid != SOLID_BSP)
+               if (clip->type == MOVE_NOMONSTERS && touch->v->solid != SOLID_BSP)
                        continue;
 
-               if (clip->boxmins[0] > touch->v.absmax[0]
-               || clip->boxmins[1] > touch->v.absmax[1]
-               || clip->boxmins[2] > touch->v.absmax[2]
-               || clip->boxmaxs[0] < touch->v.absmin[0]
-               || clip->boxmaxs[1] < touch->v.absmin[1]
-               || clip->boxmaxs[2] < touch->v.absmin[2] )
+               if (touch->v->solid == SOLID_NOT)
                        continue;
 
-               if (clip->passedict!=0 && clip->passedict->v.size[0] && !touch->v.size[0])
-                       continue;       // points never interact
-
-       // might intersect, so do an exact clip
-               if (clip->trace.allsolid)
-                       return;
                if (clip->passedict)
                {
-                       if (PROG_TO_EDICT(touch->v.owner) == clip->passedict)
+                       if (!clip->passedict->v->size[0] && !touch->v->size[0])
+                               continue;       // points never interact
+                       if (PROG_TO_EDICT(touch->v->owner) == clip->passedict)
                                continue;       // don't clip against own missiles
-                       if (PROG_TO_EDICT(clip->passedict->v.owner) == touch)
+                       if (PROG_TO_EDICT(clip->passedict->v->owner) == touch)
                                continue;       // don't clip against owner
                        // LordHavoc: corpse code
-                       if (clip->passedict->v.solid == SOLID_CORPSE && touch->v.solid == SOLID_SLIDEBOX)
+                       if (clip->passedict->v->solid == SOLID_CORPSE && (touch->v->solid == SOLID_SLIDEBOX || touch->v->solid == SOLID_CORPSE))
                                continue;
-                       if (clip->passedict->v.solid == SOLID_SLIDEBOX && touch->v.solid == SOLID_CORPSE)
+                       if (clip->passedict->v->solid == SOLID_SLIDEBOX && touch->v->solid == SOLID_CORPSE)
                                continue;
                }
 
-               if ((int)touch->v.flags & FL_MONSTER)
+               if (touch == clip->passedict)
+                       continue;
+               if (touch->v->solid == SOLID_TRIGGER)
+               {
+                       ED_Print(touch);
+                       Host_Error ("Trigger in clipping list");
+               }
+
+               // might interact, so do an exact clip
+               if (touch->v->solid == SOLID_BSP)
+                       trace = SV_ClipMoveToEntity (touch, clip->start, clip->hullmins, clip->hullmaxs, clip->end);
+               else if ((int)touch->v->flags & FL_MONSTER)
                        trace = SV_ClipMoveToEntity (touch, clip->start, clip->mins2, clip->maxs2, clip->end);
                else
                        trace = SV_ClipMoveToEntity (touch, clip->start, clip->mins, clip->maxs, clip->end);
-               if (trace.allsolid || trace.startsolid ||
-               trace.fraction < clip->trace.fraction)
+               // LordHavoc: take the 'best' answers from the new trace and combine with existing data
+               if (trace.allsolid)
+                       clip->trace.allsolid = true;
+               if (trace.startsolid)
                {
-                       trace.ent = touch;
-                       if (clip->trace.startsolid)
-                       {
-                               clip->trace = trace;
-                               clip->trace.startsolid = true;
-                       }
-                       else
-                               clip->trace = trace;
-               }
-               else if (trace.startsolid)
                        clip->trace.startsolid = true;
-       }
-       
-// recurse down both sides
-       if (node->axis == -1)
-               return;
-
-       // LordHavoc: optimized recursion
-//     if (clip->boxmaxs[node->axis] > node->dist) SV_ClipToLinks(node->children[0], clip);
-//     if (clip->boxmins[node->axis] < node->dist) SV_ClipToLinks(node->children[1], clip);
-       if (clip->boxmaxs[node->axis] > node->dist)
-       {
-               if (clip->boxmins[node->axis] < node->dist)
-                       SV_ClipToLinks(node->children[1], clip);
-               node = node->children[0];
-               goto loc0;
-       }
-       else if (clip->boxmins[node->axis] < node->dist)
-       {
-               node = node->children[1];
-               goto loc0;
-       }
-}
-
-
-/*
-==================
-SV_MoveBounds
-==================
-*/
-void SV_MoveBounds (vec3_t start, vec3_t mins, vec3_t maxs, vec3_t end, vec3_t boxmins, vec3_t boxmaxs)
-{
-#if 0
-// debug to test against everything
-boxmins[0] = boxmins[1] = boxmins[2] = -9999;
-boxmaxs[0] = boxmaxs[1] = boxmaxs[2] = 9999;
-#else
-       int             i;
-       
-       for (i=0 ; i<3 ; i++)
-       {
-               if (end[i] > start[i])
+                       if (!clip->trace.ent)
+                               clip->trace.ent = trace.ent;
+               }
+               if (trace.inopen)
+                       clip->trace.inopen = true;
+               if (trace.inwater)
+                       clip->trace.inwater = true;
+               if (trace.fraction < clip->trace.fraction)
                {
-                       boxmins[i] = start[i] + mins[i] - 1;
-                       boxmaxs[i] = end[i] + maxs[i] + 1;
+                       clip->trace.fraction = trace.fraction;
+                       VectorCopy(trace.endpos, clip->trace.endpos);
+                       clip->trace.plane = trace.plane;
+                       //clip->trace.endcontents = trace.endcontents;
+                       clip->trace.ent = touch;
                }
-               else
+               // FIXME: the handling of endcontents is really broken but works well enough for point checks
+               if (trace.endcontents < clip->trace.endcontents || trace.endcontents == CONTENTS_SOLID)
                {
-                       boxmins[i] = end[i] + mins[i] - 1;
-                       boxmaxs[i] = start[i] + maxs[i] + 1;
+                       // lower numbered (lava is lower than water, for example)
+                       // contents override higher numbered contents, except for
+                       // CONTENTS_SOLID which overrides everything
+                       clip->trace.endcontents = trace.endcontents;
                }
+               if (clip->trace.allsolid)
+                       return;
        }
-#endif
 }
 
 /*
@@ -1127,42 +605,114 @@ boxmaxs[0] = boxmaxs[1] = boxmaxs[2] = 9999;
 SV_Move
 ==================
 */
-trace_t SV_Move (vec3_t start, vec3_t mins, vec3_t maxs, vec3_t end, int type, edict_t *passedict)
+trace_t SV_Move(const vec3_t start, const vec3_t mins, const vec3_t maxs, const vec3_t end, int type, edict_t *passedict)
 {
-       moveclip_t      clip;
-       int                     i;
-
-       memset ( &clip, 0, sizeof ( moveclip_t ) );
+       moveclip_t clip;
+       vec3_t bigmins, bigmaxs;
+       areagrid_t *grid;
+       int i, igrid[3], igridmins[3], igridmaxs[3];
 
-// clip to world
-       clip.trace = SV_ClipMoveToEntity ( sv.edicts, start, mins, maxs, end );
+       memset(&clip, 0, sizeof(moveclip_t));
 
-       clip.start = start;
-       clip.end = end;
-       clip.mins = mins;
-       clip.maxs = maxs;
+       VectorCopy(start, clip.start);
+       VectorCopy(end, clip.end);
+       VectorCopy(mins, clip.mins);
+       VectorCopy(maxs, clip.maxs);
        clip.type = type;
        clip.passedict = passedict;
 
-       if (type == MOVE_MISSILE)
+       if (sv.worldmodel && sv.worldmodel->brush.RoundUpToHullSize)
+               sv.worldmodel->brush.RoundUpToHullSize(sv.worldmodel, clip.mins, clip.maxs, clip.hullmins, clip.hullmaxs);
+
+       // clip to world
+       clip.trace = SV_ClipMoveToEntity(sv.edicts, clip.start, clip.hullmins, clip.hullmaxs, clip.end);
+       if (clip.type == MOVE_WORLDONLY)
+       //if (clip.trace.allsolid)
+               return clip.trace;
+
+       if (clip.type == MOVE_MISSILE)
        {
+               // LordHavoc: modified this, was = -15, now = clip.mins[i] - 15
                for (i=0 ; i<3 ; i++)
                {
-                       clip.mins2[i] = -15;
-                       clip.maxs2[i] = 15;
+                       clip.mins2[i] = clip.mins[i] - 15;
+                       clip.maxs2[i] = clip.maxs[i] + 15;
                }
        }
        else
        {
-               VectorCopy (mins, clip.mins2);
-               VectorCopy (maxs, clip.maxs2);
+               VectorCopy (clip.mins, clip.mins2);
+               VectorCopy (clip.maxs, clip.maxs2);
        }
-       
-// create the bounding box of the entire move
-       SV_MoveBounds ( start, clip.mins2, clip.maxs2, end, clip.boxmins, clip.boxmaxs );
 
-// clip to entities
-       SV_ClipToLinks ( sv_areanodes, &clip );
+       bigmins[0] = min(clip.mins2[0], clip.hullmins[0]);
+       bigmaxs[0] = max(clip.maxs2[0], clip.hullmaxs[0]);
+       bigmins[1] = min(clip.mins2[1], clip.hullmins[1]);
+       bigmaxs[1] = max(clip.maxs2[1], clip.hullmaxs[1]);
+       bigmins[2] = min(clip.mins2[2], clip.hullmins[2]);
+       bigmaxs[2] = max(clip.maxs2[2], clip.hullmaxs[2]);
+
+       // create the bounding box of the entire move
+       if (!sv_debugmove.integer)
+       {
+               int i;
+
+               for (i=0 ; i<3 ; i++)
+               {
+                       if (clip.trace.endpos[i] > clip.start[i])
+                       {
+                               clip.boxmins[i] = clip.start[i] + bigmins[i] - 1;
+                               clip.boxmaxs[i] = clip.trace.endpos[i] + bigmaxs[i] + 1;
+                       }
+                       else
+                       {
+                               clip.boxmins[i] = clip.trace.endpos[i] + bigmins[i] - 1;
+                               clip.boxmaxs[i] = clip.start[i] + bigmaxs[i] + 1;
+                       }
+               }
+       }
+       else
+       {
+               // debug to test against everything
+               clip.boxmins[0] = clip.boxmins[1] = clip.boxmins[2] = -999999999;
+               clip.boxmaxs[0] = clip.boxmaxs[1] = clip.boxmaxs[2] =  999999999;
+       }
+
+       // clip to enttiies
+       sv_areagrid_stats_calls++;
+       sv_areagrid_marknumber++;
+       igridmins[0] = (int) ((clip.boxmins[0] + sv_areagrid_bias[0]) * sv_areagrid_scale[0]);
+       igridmins[1] = (int) ((clip.boxmins[1] + sv_areagrid_bias[1]) * sv_areagrid_scale[1]);
+       //igridmins[2] = (int) ((clip->boxmins[2] + sv_areagrid_bias[2]) * sv_areagrid_scale[2]);
+       igridmaxs[0] = (int) ((clip.boxmaxs[0] + sv_areagrid_bias[0]) * sv_areagrid_scale[0]) + 1;
+       igridmaxs[1] = (int) ((clip.boxmaxs[1] + sv_areagrid_bias[1]) * sv_areagrid_scale[1]) + 1;
+       //igridmaxs[2] = (int) ((clip->boxmaxs[2] + sv_areagrid_bias[2]) * sv_areagrid_scale[2]) + 1;
+       igridmins[0] = max(0, igridmins[0]);
+       igridmins[1] = max(0, igridmins[1]);
+       //igridmins[2] = max(0, igridmins[2]);
+       igridmaxs[0] = min(AREA_GRID, igridmaxs[0]);
+       igridmaxs[1] = min(AREA_GRID, igridmaxs[1]);
+       //igridmaxs[2] = min(AREA_GRID, igridmaxs[2]);
+
+       if (sv_areagrid_outside.solid_edicts.next != &sv_areagrid_outside.solid_edicts)
+               SV_ClipToNode(&clip, &sv_areagrid_outside.solid_edicts);
+
+       for (igrid[1] = igridmins[1];igrid[1] < igridmaxs[1];igrid[1]++)
+               for (grid = sv_areagrid + igrid[1] * AREA_GRID + igridmins[0], igrid[0] = igridmins[0];igrid[0] < igridmaxs[0];igrid[0]++, grid++)
+                       if (grid->solid_edicts.next != &grid->solid_edicts)
+                               SV_ClipToNode(&clip, &grid->solid_edicts);
 
        return clip.trace;
 }
+
+int SV_PointContents(const vec3_t point)
+{
+#if 1
+       return SV_Move(point, vec3_origin, vec3_origin, point, MOVE_NOMONSTERS, NULL).endcontents;
+#else
+       if (sv.worldmodel && sv.worldmodel->brush.PointContents)
+               return sv.worldmodel->brush.PointContents(sv.worldmodel, point);
+       return CONTENTS_SOLID;
+#endif
+}
+