Renamed wrist constants.
diff --git a/frc971/control_loops/wrist.cc b/frc971/control_loops/wrist.cc
index de62580..5bdce25 100644
--- a/frc971/control_loops/wrist.cc
+++ b/frc971/control_loops/wrist.cc
@@ -25,22 +25,22 @@
 }
 
 bool WristMotor::FetchConstants() {
-  if (!constants::horizontal_lower_limit(&horizontal_lower_limit_)) {
-    LOG(ERROR, "Failed to fetch the horizontal lower limit constant.\n");
+  if (!constants::wrist_lower_limit(&wrist_lower_limit_)) {
+    LOG(ERROR, "Failed to fetch the wrist lower limit constant.\n");
     return false;
   }
-  if (!constants::horizontal_upper_limit(&horizontal_upper_limit_)) {
-    LOG(ERROR, "Failed to fetch the horizontal upper limit constant.\n");
+  if (!constants::wrist_upper_limit(&wrist_upper_limit_)) {
+    LOG(ERROR, "Failed to fetch the wrist upper limit constant.\n");
     return false;
   }
-  if (!constants::horizontal_hall_effect_start_angle(
-          &horizontal_hall_effect_start_angle_)) {
-    LOG(ERROR, "Failed to fetch the horizontal start angle constant.\n");
+  if (!constants::wrist_hall_effect_start_angle(
+          &wrist_hall_effect_start_angle_)) {
+    LOG(ERROR, "Failed to fetch the wrist start angle constant.\n");
     return false;
   }
-  if (!constants::horizontal_zeroing_speed(
-          &horizontal_zeroing_speed_)) {
-    LOG(ERROR, "Failed to fetch the horizontal zeroing speed constant.\n");
+  if (!constants::wrist_zeroing_speed(
+          &wrist_zeroing_speed_)) {
+    LOG(ERROR, "Failed to fetch the wrist zeroing speed constant.\n");
     return false;
   }
 
@@ -48,18 +48,18 @@
 }
 
 double WristMotor::ClipGoal(double goal) const {
-  return std::min(horizontal_upper_limit_,
-                  std::max(horizontal_lower_limit_, goal));
+  return std::min(wrist_upper_limit_,
+                  std::max(wrist_lower_limit_, goal));
 }
 
 const double kMaxZeroingVoltage = 5.0;
 
 void WristMotor::WristStateFeedbackLoop::CapU() {
   if (wrist_motor_->state_ == READY) {
-    if (Y(0, 0) >= wrist_motor_->horizontal_upper_limit_) {
+    if (Y(0, 0) >= wrist_motor_->wrist_upper_limit_) {
       U(0, 0) = std::min(0.0, U(0, 0));
     }
-    if (Y(0, 0) <= wrist_motor_->horizontal_lower_limit_) {
+    if (Y(0, 0) <= wrist_motor_->wrist_lower_limit_) {
       U(0, 0) = std::max(0.0, U(0, 0));
     }
   }
@@ -104,7 +104,7 @@
   double absolute_position;
   if (position) {
     absolute_position =
-        position->pos + horizontal_hall_effect_start_angle_;
+        position->pos + wrist_hall_effect_start_angle_;
     if (state_ == READY) {
       absolute_position -= zero_offset_;
     }
@@ -146,8 +146,8 @@
         state_ = ZEROING;
       } else {
         // Slowly creep off the sensor.
-        zeroing_position_ -= horizontal_zeroing_speed_ / 100;
-        loop_->R << zeroing_position_, -horizontal_zeroing_speed_;
+        zeroing_position_ -= wrist_zeroing_speed_ / 100;
+        loop_->R << zeroing_position_, -wrist_zeroing_speed_;
         break;
       }
     case ZEROING:
@@ -176,8 +176,8 @@
         }
       } else {
         // Slowly creep towards the sensor.
-        zeroing_position_ += horizontal_zeroing_speed_ / 100;
-        loop_->R << zeroing_position_, horizontal_zeroing_speed_;
+        zeroing_position_ += wrist_zeroing_speed_ / 100;
+        loop_->R << zeroing_position_, wrist_zeroing_speed_;
       }
       break;
 
diff --git a/frc971/control_loops/wrist.h b/frc971/control_loops/wrist.h
index 81c3bcb..99d9920 100644
--- a/frc971/control_loops/wrist.h
+++ b/frc971/control_loops/wrist.h
@@ -91,10 +91,10 @@
   double last_off_position_;
 
   // Local cache of the wrist geometry constants.
-  double horizontal_lower_limit_;
-  double horizontal_upper_limit_;
-  double horizontal_hall_effect_start_angle_;
-  double horizontal_zeroing_speed_;
+  double wrist_lower_limit_;
+  double wrist_upper_limit_;
+  double wrist_hall_effect_start_angle_;
+  double wrist_zeroing_speed_;
 
   DISALLOW_COPY_AND_ASSIGN(WristMotor);
 };
diff --git a/frc971/control_loops/wrist_lib_test.cc b/frc971/control_loops/wrist_lib_test.cc
index 36474ae..2e329af 100644
--- a/frc971/control_loops/wrist_lib_test.cc
+++ b/frc971/control_loops/wrist_lib_test.cc
@@ -57,12 +57,12 @@
   void SendPositionMessage() {
     const double angle = GetPosition();
 
-    double horizontal_hall_effect_start_angle;
-    ASSERT_TRUE(constants::horizontal_hall_effect_start_angle(
-                    &horizontal_hall_effect_start_angle));
-    double horizontal_hall_effect_stop_angle;
-    ASSERT_TRUE(constants::horizontal_hall_effect_stop_angle(
-                    &horizontal_hall_effect_stop_angle));
+    double wrist_hall_effect_start_angle;
+    ASSERT_TRUE(constants::wrist_hall_effect_start_angle(
+                    &wrist_hall_effect_start_angle));
+    double wrist_hall_effect_stop_angle;
+    ASSERT_TRUE(constants::wrist_hall_effect_stop_angle(
+                    &wrist_hall_effect_stop_angle));
 
     ::aos::ScopedMessagePtr<control_loops::WristLoop::Position> position =
         my_wrist_loop_.position.MakeMessage();
@@ -71,8 +71,8 @@
     // Signal that the hall effect sensor has been triggered if it is within
     // the correct range.
     double abs_position = GetAbsolutePosition();
-    if (abs_position >= horizontal_hall_effect_start_angle &&
-        abs_position <= horizontal_hall_effect_stop_angle) {
+    if (abs_position >= wrist_hall_effect_start_angle &&
+        abs_position <= wrist_hall_effect_stop_angle) {
       position->hall_effect = true;
     } else {
       position->hall_effect = false;
@@ -80,11 +80,11 @@
 
     // Only set calibration if it changed last cycle.  Calibration starts out
     // with a value of 0.
-    if ((last_position_ < horizontal_hall_effect_start_angle ||
-         last_position_ > horizontal_hall_effect_stop_angle) &&
+    if ((last_position_ < wrist_hall_effect_start_angle ||
+         last_position_ > wrist_hall_effect_stop_angle) &&
          position->hall_effect) {
       calibration_value_ =
-          horizontal_hall_effect_start_angle - initial_position_;
+          wrist_hall_effect_start_angle - initial_position_;
     }
 
     position->calibration = calibration_value_;
@@ -99,15 +99,17 @@
     wrist_plant_->Update();
 
     // Assert that we are in the right physical range.
-    double horizontal_upper_physical_limit;
-    ASSERT_TRUE(constants::horizontal_upper_physical_limit(
-                    &horizontal_upper_physical_limit));
-    double horizontal_lower_physical_limit;
-    ASSERT_TRUE(constants::horizontal_lower_physical_limit(
-                    &horizontal_lower_physical_limit));
+    double wrist_upper_physical_limit;
+    ASSERT_TRUE(constants::wrist_upper_physical_limit(
+                    &wrist_upper_physical_limit));
+    double wrist_lower_physical_limit;
+    ASSERT_TRUE(constants::wrist_lower_physical_limit(
+                    &wrist_lower_physical_limit));
 
-    EXPECT_GE(horizontal_upper_physical_limit, wrist_plant_->Y(0, 0));
-    EXPECT_LE(horizontal_lower_physical_limit, wrist_plant_->Y(0, 0));
+    EXPECT_GE(wrist_upper_physical_limit,
+              wrist_plant_->Y(0, 0));
+    EXPECT_LE(wrist_lower_physical_limit,
+              wrist_plant_->Y(0, 0));
   }
 
   ::std::unique_ptr<StateFeedbackPlant<2, 1, 1>> wrist_plant_;