Function collide_generic_and_player

physics/collide.cpp:2067–2145

}

void collide_generic_and_player(object *robotobj, object *playerobj, vector *collision_point, vector *collision_normal,
                                bool f_reverse_normal, fvi_info *hit_info) {
  if (f_reverse_normal)
    *collision_normal *= -1.0f;

  vector rvel;
  if (robotobj->movement_type == MT_PHYSICS || robotobj->movement_type == MT_WALKING) {
    rvel = robotobj->mtype.phys_info.velocity;
  } else {
    rvel = Zero_vector;
  }
  rvel -= playerobj->mtype.phys_info.velocity;
  float speed = vm_NormalizeVector(&rvel);
  float scalar;

  if (speed <= MIN_WALL_HIT_SOUND_VEL) {
    scalar = 0.0f;
  } else if (speed >= MAX_WALL_HIT_SOUND_VEL) {
    scalar = 1.0f;
  } else {
    scalar = (speed - MIN_WALL_HIT_SOUND_VEL) / (MAX_WALL_HIT_SOUND_VEL - MIN_WALL_HIT_SOUND_VEL);
  }

  // Check for lava surface on an object
  if ((robotobj->type == OBJ_BUILDING) && hit_info) {
    poly_model *pm = GetPolymodelPointer(robotobj->rtype.pobj_info.model_num);
    int tmap = pm->textures[pm->submodel[hit_info->hit_subobject[0]].faces[hit_info->hit_face[0]].texnum];

    if (GameTextures[tmap].flags & TF_LAVA) {
      if (!((Game_mode & GM_MULTI) && (Netgame.local_role == LR_CLIENT))) {
        int id = FindWeaponName("NapalmBlob");
        if (id >= 0)
          SetNapalmDamageEffect(playerobj, nullptr, id);
        else
          Int3();
      }
      scalar = 0; // don't make collide sound
    }
  }

  if (scalar > .01 || (robotobj->mtype.phys_info.flags & PF_LOCK_MASK)) {
    pos_state cur_pos;
    cur_pos.position = collision_point;
    cur_pos.orient = &playerobj->orient;
    cur_pos.roomnum = playerobj->roomnum;

    Sound_system.Play3dSound(SOUND_PLAYER_HIT_WALL, SND_PRIORITY_HIGHEST, &cur_pos, MAX_GAME_VOLUME * scalar);

    ain_hear hear;
    hear.f_directly_player = true;
    hear.hostile_level = 0.10f;
    hear.curiosity_level = 0.5f;
    hear.max_dist = Sounds[SOUND_PLAYER_HIT_WALL].max_distance * scalar;
    AINotify(playerobj, AIN_HEAR_NOISE, (void *)&hear);

    if ((scalar > .25f && (robotobj->movement_type == MT_WALKING || robotobj->movement_type == MT_PHYSICS)) ||
        ((robotobj->mtype.phys_info.flags & PF_LOCK_MASK) &&
         (robotobj->mtype.phys_info.flags & PF_POINT_COLLIDE_WALLS))) {