Function AIDetermineAimPoint

Descent3/AImain.cpp:2778–2824

}

bool AIDetermineAimPoint(object *robot, object *target, vector *aim_pt, float weapon_speed) {
  if (DIFF_LEVEL == DIFFICULTY_TRAINEE && ((robot->ai_info->flags & AIF_TEAM_MASK) != AIF_TEAM_REBEL)) {
    *aim_pt = target->pos;
    return true;
  }

  float vl = AIDetermineObjVisLevel(robot, target);

  ai_frame *ai_info = robot->ai_info;
  vector to_target = target->pos - robot->pos;
  float dist_to_target = vm_NormalizeVector(&to_target);

  if (weapon_speed == 0.0f && ai_info)
    weapon_speed = ai_info->weapon_speed;

  if (weapon_speed == 0.0f) {
    *aim_pt = target->pos;
    return false;
  }

  float wsp = weapon_speed - (to_target * target->mtype.phys_info.velocity);

  if (wsp <= 0.0f || vl < AIVIS_BARELY) {
    *aim_pt = target->pos;
    return false;
  }

  float dt = dist_to_target / wsp;

  float scale;

  if (ai_info)
    scale = ai_info->lead_accuracy;
  else
    scale = 1.0f;

  // chrishack -- add stuff so that rebels get better as DIFF lowers and
  // ptmc gets better as DIFF increases
  if (target->type != OBJ_PLAYER ||
      (DIFF_LEVEL < DIFFICULTY_HOTSHOT && ((robot->ai_info->flags & AIF_TEAM_MASK) != AIF_TEAM_REBEL)) ||
      scale < 0.4f || vl <= AIVIS_MOSTLY)
    *aim_pt = target->pos + (target->mtype.phys_info.velocity * dt) * scale;
  else
    ApplyConstantForce(target, aim_pt, &target->mtype.phys_info.thrust, dt * scale);

  return true;
}

vector *AIDetermineFovVec(object *obj, vector *fov) {
  ai_frame *ai_info = obj->ai_info;