// Own objective locations are doctrine, not enemy observations. A straight-line
// heading suggests a destination; it does not assert a road route or player goal.
class ERR_HQDoctrine
{
 static float Threat(vector objective, vector lastSeen, vector velocity, bool heading,
  float confidence, float radius)
 {
  if (!ERR_HQPursuitRules.PositionValid(objective) || !ERR_HQPursuitRules.PositionValid(lastSeen)) return 0;
  float standing = 0.2;
  if (!ERR_HQPursuitRules.Finite(confidence) || confidence < 0 || confidence > 1
   || !ERR_HQPursuitRules.Finite(radius) || radius < 0 || radius > 2000) return standing;
  vector route = objective - lastSeen;
  route[1] = 0;
  float distance = route.Length();
  float proximity = 1 / (1 + distance / Math.Max(100, radius));
  float alignment;
  if (distance > 1 && ERR_HQPursuitRules.Heading(velocity, heading))
   alignment = Math.Max(0, vector.Dot(route.Normalized(), ERR_HQPursuitRules.Direction(velocity, true)));
  return standing + confidence * (0.4 * proximity + 0.6 * alignment / (1 + distance / 3000));
 }
 static bool Forward(vector objective, vector position, vector velocity, bool heading)
 {
  if (!ERR_HQPursuitRules.PositionValid(objective) || !ERR_HQPursuitRules.PositionValid(position)
   || !ERR_HQPursuitRules.Heading(velocity, heading)) return false;
  vector route = objective - position;
  route[1] = 0;
  return route.Length() >= 150 && vector.Dot(route.Normalized(), ERR_HQPursuitRules.Direction(velocity, true)) >= 0.5;
 }
 static vector Approach(vector objective, vector position)
 {
  vector route = objective - position;
  route[1] = 0;
  if (route.Length() < 1) return position;
  return position + route.Normalized() * Math.Clamp(route.Length() * 0.25, 100, 200);
 }
}