phys.c

   1 // for physics functions shared by the client and server
   2
   3 #include "phys.h"
   4
   5 #include "quakedef.h"
   6 #include "cl_collision.h"
   7
   8
   9 int PHYS_NudgeOutOfSolid(prvm_prog_t *prog, prvm_edict_t *ent)
  10 {
  11         int bump, pass;
  12         trace_t stucktrace;
  13         vec3_t stuckorigin;
  14         vec3_t stuckmins, stuckmaxs;
  15         vec_t separation;
  16         model_t *worldmodel;
  17
  18         if (prog == SVVM_prog)
  19         {
  20                 worldmodel = sv.worldmodel;
  21                 separation = sv_gameplayfix_nudgeoutofsolid_separation.value;
  22         }
  23         else if (prog == CLVM_prog)
  24         {
  25                 worldmodel = cl.worldmodel;
  26                 separation = cl_gameplayfix_nudgeoutofsolid_separation.value;
  27         }
  28         else
  29                 Sys_Error("PHYS_NudgeOutOfSolid: cannot be called from %s VM\n", prog->name);
  30
  31         VectorCopy(PRVM_serveredictvector(ent, mins), stuckmins);
  32         VectorCopy(PRVM_serveredictvector(ent, maxs), stuckmaxs);
  33         if (worldmodel && worldmodel->brushq1.numclipnodes)
  34                 separation = 0.0f; // when using hulls, it can not be enlarged
  35         else
  36         {
  37                 stuckmins[0] -= separation;
  38                 stuckmins[1] -= separation;
  39                 stuckmins[2] -= separation;
  40                 stuckmaxs[0] += separation;
  41                 stuckmaxs[1] += separation;
  42                 stuckmaxs[2] += separation;
  43         }
  44
  45         // first pass we try to get it out of brush entities
  46         // second pass we try to get it out of world only (can't win them all)
  47         for (pass = 0;pass < 2;pass++)
  48         {
  49                 VectorCopy(PRVM_serveredictvector(ent, origin), stuckorigin);
  50                 for (bump = 0;bump < 10;bump++)
  51                 {
  52                         if (prog == SVVM_prog) // TODO: can we refactor to use a shared TraceBox or at least a func ptr for these cases?
  53                                 stucktrace = SV_TraceBox(stuckorigin, stuckmins, stuckmaxs, stuckorigin, pass ? MOVE_WORLDONLY : MOVE_NOMONSTERS, ent, SV_GenericHitSuperContentsMask(ent), 0, 0, collision_extendmovelength.value);
  54                         else
  55                                 stucktrace = CL_TraceBox(stuckorigin, stuckmins, stuckmaxs, stuckorigin, pass ? MOVE_WORLDONLY : MOVE_NOMONSTERS, ent, SV_GenericHitSuperContentsMask(ent), 0, 0, collision_extendmovelength.value, pass ? false : true, false, NULL, false);
  56
  57                         // Separation compared here to ensure a good location will be recognised reliably.
  58                         if (-stucktrace.startdepth <= separation
  59                         || (!stucktrace.bmodelstartsolid && !stucktrace.worldstartsolid)
  60                         || (pass && !stucktrace.worldstartsolid))
  61                         {
  62                                 // found a good location, use it
  63                                 VectorCopy(stuckorigin, PRVM_serveredictvector(ent, origin));
  64                                 return bump || pass ? 1 : -1; // -1 means it wasn't stuck
  65                         }
  66
  67                         VectorMA(stuckorigin, -stucktrace.startdepth, stucktrace.startdepthnormal, stuckorigin);
  68                 }
  69         }
  70         return 0;
  71 }