WPILib Reorganization

This is a major restructuring of the WPILib repository to simply build
procedures and remove the remnants of Maven from everything except the
eclipse plugins. Gradle files have been largely simplified or rewritten,
taking advantage of splitting up parts of the build into separate build
files for ease of reading.

The eclipse plugins are now in a separate project, as is ntcore. All
dependencies are resolved via Maven dependencies, with the
Jenkins-maintained WPILib repo. Project structures have also been
simplified: we no longer have separate subprojects inside wpilibc and
wpilibj. Where possible, these changes hav been done with git renames,
to make sure we still have full history for all repositories. Other
unrelated subprojects have also been broken out: OutlineViewer is now a
separate project.

Change-Id: Ib4e2a6e1a2f66427a14f16612b0e0d69ed661878

wpilibc/Athena/src/AnalogPotentiometer.cpp

@@ -0,0 +1,92 @@
+#include "AnalogPotentiometer.h"
+#include "ControllerPower.h"
+
+/**
+ * Construct an Analog Potentiometer object from a channel number.
+ * @param channel The channel number on the roboRIO to represent. 0-3 are
+ * on-board 4-7 are on the MXP port.
+ * @param fullRange The angular value (in desired units) representing the full
+ * 0-5V range of the input.
+ * @param offset The angular value (in desired units) representing the angular
+ * output at 0V.
+ */
+AnalogPotentiometer::AnalogPotentiometer(int channel, double fullRange,
+                                         double offset)
+    : m_analog_input(std::make_unique<AnalogInput>(channel)),
+      m_fullRange(fullRange),
+      m_offset(offset) {}
+
+/**
+ * Construct an Analog Potentiometer object from an existing Analog Input
+ * pointer.
+ * @param channel The existing Analog Input pointer
+ * @param fullRange The angular value (in desired units) representing the full
+ * 0-5V range of the input.
+ * @param offset The angular value (in desired units) representing the angular
+ * output at 0V.
+ */
+DEPRECATED(
+    "Raw pointers are deprecated; if you just want to construct an "
+    "AnalogPotentiometer with its own AnalogInput, then call the "
+    "AnalogPotentiometer(int channel). If you want to keep your own copy of "
+    "the AnalogInput, use std::shared_ptr.")
+AnalogPotentiometer::AnalogPotentiometer(AnalogInput *input, double fullRange,
+                                         double offset)
+    : m_analog_input(input, NullDeleter<AnalogInput>()),
+      m_fullRange(fullRange),
+      m_offset(offset) {}
+
+/**
+ * Construct an Analog Potentiometer object from an existing Analog Input
+ * pointer.
+ * @param channel The existing Analog Input pointer
+ * @param fullRange The angular value (in desired units) representing the full
+ * 0-5V range of the input.
+ * @param offset The angular value (in desired units) representing the angular
+ * output at 0V.
+ */
+AnalogPotentiometer::AnalogPotentiometer(std::shared_ptr<AnalogInput> input,
+                                         double fullRange, double offset)
+    : m_analog_input(input), m_fullRange(fullRange), m_offset(offset) {}
+
+/**
+ * Get the current reading of the potentiometer.
+ *
+ * @return The current position of the potentiometer (in the units used for
+ * fullRaneg and offset).
+ */
+double AnalogPotentiometer::Get() const {
+  return (m_analog_input->GetVoltage() / ControllerPower::GetVoltage5V()) *
+             m_fullRange +
+         m_offset;
+}
+
+/**
+ * Implement the PIDSource interface.
+ *
+ * @return The current reading.
+ */
+double AnalogPotentiometer::PIDGet() { return Get(); }
+
+/**
+ * @return the Smart Dashboard Type
+ */
+std::string AnalogPotentiometer::GetSmartDashboardType() const {
+  return "Analog Input";
+}
+
+/**
+ * Live Window code, only does anything if live window is activated.
+ */
+void AnalogPotentiometer::InitTable(std::shared_ptr<ITable> subtable) {
+  m_table = subtable;
+  UpdateTable();
+}
+
+void AnalogPotentiometer::UpdateTable() {
+  if (m_table != nullptr) {
+    m_table->PutNumber("Value", Get());
+  }
+}
+
+std::shared_ptr<ITable> AnalogPotentiometer::GetTable() const { return m_table; }