Function AquireElectricalTarget

Descent3/WeaponFire.cpp:1068–1210

Picks out a target for an elecrical weapon to fire on

// Picks out a target for an elecrical weapon to fire on
void AquireElectricalTarget(object *obj) {
  int i;
  float closest_dist = 99999, dist;
  object *closest_obj = NULL, *hit_obj_ptr;

  if (obj->mtype.phys_info.flags & PF_HOMING) {
    for (i = 0; i <= Highest_object_index; i++) {
      hit_obj_ptr = &Objects[i];

      if ((hit_obj_ptr->render_type == RT_NONE) ||
          !(hit_obj_ptr->type == OBJ_PLAYER || hit_obj_ptr->type == OBJ_ROBOT ||
            (hit_obj_ptr->type == OBJ_BUILDING && hit_obj_ptr->ai_info)))
        continue;

      if (ObjectsAreRelated(OBJNUM(obj), i))
        continue;

      if (obj == hit_obj_ptr)
        continue;

      if (hit_obj_ptr->flags & OF_DEAD)
        continue;

      // The GB has an "electric shield" that works kind of like a Faraday's Cage (it also
      // make him less annoying as a player's own Omega will not track his GB)
      if (IS_GUIDEBOT(hit_obj_ptr))
        continue;

      // Make sure this target is within our view cone
      vector subvec = hit_obj_ptr->pos - obj->pos;
      vm_NormalizeVectorFast(&subvec);
      if (vm_DotProduct(&subvec, &obj->orient.fvec) < .8)
        continue;

      // The distance is actually the objects' centers minus some of the hit object's radius (I set it to 80%)
      if ((hit_obj_ptr->flags & OF_POLYGON_OBJECT) && hit_obj_ptr->type != OBJ_WEAPON &&
          hit_obj_ptr->type != OBJ_POWERUP && hit_obj_ptr->type != OBJ_DEBRIS) {
        vector pos;
        pos = hit_obj_ptr->pos + hit_obj_ptr->wall_sphere_offset;

        dist = vm_VectorDistanceQuick(&pos, &obj->pos) - Poly_models[hit_obj_ptr->rtype.pobj_info.model_num].wall_size;
      } else {
        dist = vm_VectorDistanceQuick(&hit_obj_ptr->pos, &obj->pos) - hit_obj_ptr->size;
      }

      if (dist < 0.0f)
        dist = 0.0f;
      if (dist > 50)
        continue;

      if (dist <= closest_dist) {
        closest_dist = dist;
        closest_obj = hit_obj_ptr;
      }
    }
  }

  if (closest_obj != NULL) {