#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include "logic.hh"
#include "vehicle.hh"
#include "view.hh"
#include <stdio.h>

int
Logic::lvalue(Vehicle *)
{
  return -1;
}

double
Logic::calculate(Vector<double> &, Vehicle *)
{
  return 0;
}

Logic *
Logic::null_logic()
{
  static Logic *nl = 0;
  if (!nl) nl = new Logic();
  return nl;
}

void
Logic::draw(Vehicle *, int, View *)
{
}

void
Logic::print()
{
  fprintf(stderr, "??");
}

LinearLogic::LinearLogic(int sensor, double y_intercept, double slope)
  : _sensor(sensor), _y_intercept(y_intercept), _slope(slope)
{
}

double
LinearLogic::calculate(Vector<double> &sensations, Vehicle *)
{
  return _y_intercept + sensations[_sensor] * _slope;
}

void
LinearLogic::draw(Vehicle *vehicle, int actuator, View *view)
{
  Point p1 = vehicle->sensor_position(_sensor);
  Point p2 = vehicle->actuator_position(actuator);
  view->draw_line(vehicle->sensor_gc(), p1, p2);
}