+/*
+=================
+VM_SV_checkpvs
+
+Checks if an entity is in a point's PVS.
+Should be fast but can be inexact.
+
+float checkpvs(vector viewpos, entity viewee) = #240;
+=================
+*/
+static void VM_SV_checkpvs (void)
+{
+ vec3_t viewpos;
+ prvm_edict_t *viewee;
+#if 1
+ unsigned char *pvs;
+#else
+ static int fatpvsbytes;
+ static unsigned char fatpvs[MAX_MAP_LEAFS/8];
+#endif
+
+ VM_SAFEPARMCOUNT(2, VM_SV_checkpvs);
+ VectorCopy(PRVM_G_VECTOR(OFS_PARM0), viewpos);
+ viewee = PRVM_G_EDICT(OFS_PARM1);
+
+ if(viewee->priv.server->free)
+ {
+ VM_Warning("checkpvs: can not check free entity\n");
+ PRVM_G_FLOAT(OFS_RETURN) = 4;
+ return;
+ }
+
+#if 1
+ if(!sv.worldmodel->brush.GetPVS || !sv.worldmodel->brush.BoxTouchingPVS)
+ {
+ // no PVS support on this worldmodel... darn
+ PRVM_G_FLOAT(OFS_RETURN) = 3;
+ return;
+ }
+ pvs = sv.worldmodel->brush.GetPVS(sv.worldmodel, viewpos);
+ if(!pvs)
+ {
+ // viewpos isn't in any PVS... darn
+ PRVM_G_FLOAT(OFS_RETURN) = 2;
+ return;
+ }
+ PRVM_G_FLOAT(OFS_RETURN) = sv.worldmodel->brush.BoxTouchingPVS(sv.worldmodel, pvs, viewee->fields.server->absmin, viewee->fields.server->absmax);
+#else
+ // using fat PVS like FTEQW does (slow)
+ if(!sv.worldmodel->brush.FatPVS || !sv.worldmodel->brush.BoxTouchingPVS)
+ {
+ // no PVS support on this worldmodel... darn
+ PRVM_G_FLOAT(OFS_RETURN) = 3;
+ return;
+ }
+ fatpvsbytes = sv.worldmodel->brush.FatPVS(sv.worldmodel, viewpos, 8, fatpvs, sizeof(fatpvs), false);
+ if(!fatpvsbytes)
+ {
+ // viewpos isn't in any PVS... darn
+ PRVM_G_FLOAT(OFS_RETURN) = 2;
+ return;
+ }
+ PRVM_G_FLOAT(OFS_RETURN) = sv.worldmodel->brush.BoxTouchingPVS(sv.worldmodel, fatpvs, viewee->fields.server->absmin, viewee->fields.server->absmax);
+#endif
+}
+