Add constant-heading localizer reset button

Change-Id: I25afc8985dbce2199f6fc4e7eb91c58b1e9bbc5d
diff --git a/y2019/control_loops/drivetrain/event_loop_localizer.cc b/y2019/control_loops/drivetrain/event_loop_localizer.cc
index 282ca9e..889133f 100644
--- a/y2019/control_loops/drivetrain/event_loop_localizer.cc
+++ b/y2019/control_loops/drivetrain/event_loop_localizer.cc
@@ -34,7 +34,7 @@
       target_selector_(event_loop) {
   localizer_.ResetInitialState(::aos::monotonic_clock::now(),
                                Localizer::State::Zero(), localizer_.P());
-  ResetPosition(::aos::monotonic_clock::now(), 0.5, 3.4, 0.0, 0.0);
+  ResetPosition(::aos::monotonic_clock::now(), 0.5, 3.4, 0.0, 0.0, true);
   frame_fetcher_ = event_loop_->MakeFetcher<CameraFrame>(
       ".y2019.control_loops.drivetrain.camera_frames");
 }
diff --git a/y2019/control_loops/drivetrain/event_loop_localizer.h b/y2019/control_loops/drivetrain/event_loop_localizer.h
index 9255109..183e817 100644
--- a/y2019/control_loops/drivetrain/event_loop_localizer.h
+++ b/y2019/control_loops/drivetrain/event_loop_localizer.h
@@ -36,13 +36,16 @@
   void Reset(::aos::monotonic_clock::time_point t,
              const Localizer::State &state, double theta_uncertainty);
   void ResetPosition(::aos::monotonic_clock::time_point t, double x, double y,
-                     double theta, double theta_uncertainty) override {
+                     double theta, double theta_uncertainty,
+                     bool reset_theta) override {
     // When we reset the state, we want to keep the encoder positions intact, so
     // we copy from the original state and reset everything else.
     Localizer::State new_state = localizer_.X_hat();
     new_state.x() = x;
     new_state.y() = y;
-    new_state(2, 0) = theta;
+    if (reset_theta) {
+      new_state(2, 0) = theta;
+    }
     // Velocity terms.
     new_state(4, 0) = 0.0;
     new_state(6, 0) = 0.0;
diff --git a/y2019/joystick_reader.cc b/y2019/joystick_reader.cc
index 766de6e..816a1df 100644
--- a/y2019/joystick_reader.cc
+++ b/y2019/joystick_reader.cc
@@ -87,10 +87,16 @@
 const ButtonLocation kResetLocalizerRightForwards(3, 8);
 const ButtonLocation kResetLocalizerRightBackwards(3, 7);
 
+const ButtonLocation kResetLocalizerLeft(3, 11);
+const ButtonLocation kResetLocalizerRight(3, 13);
+
 const ButtonLocation kNearCargoHint(3, 3);
 const ButtonLocation kMidCargoHint(3, 5);
 const ButtonLocation kFarCargoHint(3, 6);
 
+const JoystickAxis kCargoSelectorY(5, 6);
+const JoystickAxis kCargoSelectorX(5, 5);
+
 const ButtonLocation kCameraLog(3, 14);
 
 const ElevatorWristPosition kStowPos{0.36, 0.0};
@@ -178,13 +184,47 @@
       } else if (data.IsPressed(kFarCargoHint)) {
         target_hint->suggested_target = 3;
       } else {
-        target_hint->suggested_target = 0;
+        const double cargo_joy_y = data.GetAxis(kCargoSelectorY);
+        const double cargo_joy_x = data.GetAxis(kCargoSelectorX);
+        if (cargo_joy_y > 0.5) {
+          target_hint->suggested_target = 3;
+        } else if (cargo_joy_y < -0.5) {
+          target_hint->suggested_target = 1;
+        } else if (::std::abs(cargo_joy_x) > 0.5) {
+          target_hint->suggested_target = 2;
+        } else {
+          target_hint->suggested_target = 0;
+        }
       }
       if (!target_hint.Send()) {
         LOG(ERROR, "Failed to send target selector hint.\n");
       }
     }
 
+    if (data.PosEdge(kResetLocalizerLeft)) {
+      auto localizer_resetter = localizer_control.MakeMessage();
+      // Start at the left feeder station.
+      localizer_resetter->x = 0.6;
+      localizer_resetter->y = 3.4;
+      localizer_resetter->keep_current_theta = true;
+
+      if (!localizer_resetter.Send()) {
+        LOG(ERROR, "Failed to reset localizer.\n");
+      }
+    }
+
+    if (data.PosEdge(kResetLocalizerRight)) {
+      auto localizer_resetter = localizer_control.MakeMessage();
+      // Start at the left feeder station.
+      localizer_resetter->x = 0.6;
+      localizer_resetter->y = -3.4;
+      localizer_resetter->keep_current_theta = true;
+
+      if (!localizer_resetter.Send()) {
+        LOG(ERROR, "Failed to reset localizer.\n");
+      }
+    }
+
     if (data.PosEdge(kResetLocalizerLeftForwards)) {
       auto localizer_resetter = localizer_control.MakeMessage();
       // Start at the left feeder station.