1 files changed, 71 insertions, 0 deletions
diff --git a/Source/Core/InputCommon/ControllerEmu/ControlGroup/AnalogStick.cpp b/Source/Core/InputCommon/ControllerEmu/ControlGroup/AnalogStick.cpp
new file mode 100644
index 0000000000..8ee7357963
--- /dev/null
+++ b/Source/Core/InputCommon/ControllerEmu/ControlGroup/AnalogStick.cpp
@@ -0,0 +1,71 @@
+// Copyright 2017 Dolphin Emulator Project
+// Licensed under GPLv2+
+// Refer to the license.txt file included.
+
+#include "InputCommon/ControllerEmu/ControlGroup/AnalogStick.h"
+
+#include <algorithm>
+#include <cmath>
+#include <memory>
+
+#include "Common/Common.h"
+
+#include "InputCommon/ControlReference/ControlReference.h"
+#include "InputCommon/ControllerEmu/Control/Control.h"
+#include "InputCommon/ControllerEmu/Control/Input.h"
+#include "InputCommon/ControllerEmu/ControllerEmu.h"
+
+namespace ControllerEmu
+{
+AnalogStick::AnalogStick(const char* const name_, ControlState default_radius)
+    : AnalogStick(name_, name_, default_radius)
+{
+}
+
+AnalogStick::AnalogStick(const char* const name_, const char* const ui_name_,
+                         ControlState default_radius)
+    : ControlGroup(name_, ui_name_, GROUP_TYPE_STICK)
+{
+  for (auto& named_direction : named_directions)
+    controls.emplace_back(std::make_unique<Input>(named_direction));
+
+  controls.emplace_back(std::make_unique<Input>(_trans("Modifier")));
+  numeric_settings.emplace_back(
+      std::make_unique<NumericSetting>(_trans("Radius"), default_radius, 0, 100));
+  numeric_settings.emplace_back(std::make_unique<NumericSetting>(_trans("Dead Zone"), 0, 0, 50));
+}
+
+void AnalogStick::GetState(ControlState* const x, ControlState* const y)
+{
+  ControlState yy = controls[0]->control_ref->State() - controls[1]->control_ref->State();
+  ControlState xx = controls[3]->control_ref->State() - controls[2]->control_ref->State();
+
+  ControlState radius = numeric_settings[SETTING_RADIUS]->GetValue();
+  ControlState deadzone = numeric_settings[SETTING_DEADZONE]->GetValue();
+  ControlState m = controls[4]->control_ref->State();
+
+  ControlState ang = atan2(yy, xx);
+  ControlState ang_sin = sin(ang);
+  ControlState ang_cos = cos(ang);
+
+  ControlState dist = sqrt(xx * xx + yy * yy);
+
+  // dead zone code
+  dist = std::max(0.0, dist - deadzone);
+  dist /= (1 - deadzone);
+
+  // radius
+  dist *= radius;
+
+  // The modifier halves the distance by 50%, which is useful
+  // for keyboard controls.
+  if (m)
+    dist *= 0.5;
+
+  yy = std::max(-1.0, std::min(1.0, ang_sin * dist));
+  xx = std::max(-1.0, std::min(1.0, ang_cos * dist));
+
+  *y = yy;
+  *x = xx;
+}
+}  // namespace ControllerEmu