1 files changed, 99 insertions, 0 deletions
diff --git a/Source/Core/InputCommon/ControllerEmu/ControlGroup/Tilt.cpp b/Source/Core/InputCommon/ControllerEmu/ControlGroup/Tilt.cpp
new file mode 100644
index 0000000000..5481d92606
--- /dev/null
+++ b/Source/Core/InputCommon/ControllerEmu/ControlGroup/Tilt.cpp
@@ -0,0 +1,99 @@
+// Copyright 2017 Dolphin Emulator Project
+// Licensed under GPLv2+
+// Refer to the license.txt file included.
+
+#include "InputCommon/ControllerEmu/ControlGroup/Tilt.h"
+
+#include <algorithm>
+#include <cmath>
+#include <cstring>
+#include <memory>
+#include <string>
+
+#include "Common/Common.h"
+#include "InputCommon/ControlReference/ControlReference.h"
+#include "InputCommon/ControllerEmu/Control/Control.h"
+#include "InputCommon/ControllerEmu/Control/Input.h"
+
+namespace ControllerEmu
+{
+Tilt::Tilt(const std::string& name_) : ControlGroup(name_, GROUP_TYPE_TILT)
+{
+  memset(m_tilt, 0, sizeof(m_tilt));
+
+  controls.emplace_back(std::make_unique<Input>("Forward"));
+  controls.emplace_back(std::make_unique<Input>("Backward"));
+  controls.emplace_back(std::make_unique<Input>("Left"));
+  controls.emplace_back(std::make_unique<Input>("Right"));
+
+  controls.emplace_back(std::make_unique<Input>(_trans("Modifier")));
+
+  numeric_settings.emplace_back(std::make_unique<NumericSetting>(_trans("Dead Zone"), 0, 0, 50));
+  numeric_settings.emplace_back(std::make_unique<NumericSetting>(_trans("Circle Stick"), 0));
+  numeric_settings.emplace_back(std::make_unique<NumericSetting>(_trans("Angle"), 0.9, 0, 180));
+}
+
+void Tilt::GetState(ControlState* const x, ControlState* const y, const bool step)
+{
+  // this is all a mess
+
+  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 deadzone = numeric_settings[0]->GetValue();
+  ControlState circle = numeric_settings[1]->GetValue();
+  auto const angle = numeric_settings[2]->GetValue() / 1.8;
+  ControlState m = controls[4]->control_ref->State();
+
+  // deadzone / circle stick code
+  // this section might be all wrong, but its working good enough, I think
+
+  ControlState ang = atan2(yy, xx);
+  ControlState ang_sin = sin(ang);
+  ControlState ang_cos = cos(ang);
+
+  // the amt a full square stick would have at current angle
+  ControlState square_full =
+      std::min(ang_sin ? 1 / fabs(ang_sin) : 2, ang_cos ? 1 / fabs(ang_cos) : 2);
+
+  // the amt a full stick would have that was (user setting circular) at current angle
+  // I think this is more like a pointed circle rather than a rounded square like it should be
+  ControlState stick_full = (square_full * (1 - circle)) + (circle);
+
+  ControlState dist = sqrt(xx * xx + yy * yy);
+
+  // dead zone code
+  dist = std::max(0.0, dist - deadzone * stick_full);
+  dist /= (1 - deadzone);
+
+  // circle stick code
+  ControlState amt = dist / stick_full;
+  dist += (square_full - 1) * amt * circle;
+
+  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));
+
+  // this is kinda silly here
+  // gui being open will make this happen 2x as fast, o well
+
+  // silly
+  if (step)
+  {
+    if (xx > m_tilt[0])
+      m_tilt[0] = std::min(m_tilt[0] + 0.1, xx);
+    else if (xx < m_tilt[0])
+      m_tilt[0] = std::max(m_tilt[0] - 0.1, xx);
+
+    if (yy > m_tilt[1])
+      m_tilt[1] = std::min(m_tilt[1] + 0.1, yy);
+    else if (yy < m_tilt[1])
+      m_tilt[1] = std::max(m_tilt[1] - 0.1, yy);
+  }
+
+  *y = m_tilt[1] * angle;
+  *x = m_tilt[0] * angle;
+}
+}  // namespace ControllerEmu