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-rw-r--r--src/input_common/CMakeLists.txt2
-rw-r--r--src/input_common/main.cpp15
-rw-r--r--src/input_common/main.h5
-rw-r--r--src/input_common/motion_emu.cpp165
-rw-r--r--src/input_common/motion_emu.h46
5 files changed, 231 insertions, 2 deletions
diff --git a/src/input_common/CMakeLists.txt b/src/input_common/CMakeLists.txt
index e3e36ada7..92792a702 100644
--- a/src/input_common/CMakeLists.txt
+++ b/src/input_common/CMakeLists.txt
@@ -2,12 +2,14 @@ set(SRCS
analog_from_button.cpp
keyboard.cpp
main.cpp
+ motion_emu.cpp
)
set(HEADERS
analog_from_button.h
keyboard.h
main.h
+ motion_emu.h
)
if(SDL2_FOUND)
diff --git a/src/input_common/main.cpp b/src/input_common/main.cpp
index 699f41e6b..557353740 100644
--- a/src/input_common/main.cpp
+++ b/src/input_common/main.cpp
@@ -7,6 +7,7 @@
#include "input_common/analog_from_button.h"
#include "input_common/keyboard.h"
#include "input_common/main.h"
+#include "input_common/motion_emu.h"
#ifdef HAVE_SDL2
#include "input_common/sdl/sdl.h"
#endif
@@ -14,12 +15,16 @@
namespace InputCommon {
static std::shared_ptr<Keyboard> keyboard;
+static std::shared_ptr<MotionEmu> motion_emu;
void Init() {
- keyboard = std::make_shared<InputCommon::Keyboard>();
+ keyboard = std::make_shared<Keyboard>();
Input::RegisterFactory<Input::ButtonDevice>("keyboard", keyboard);
Input::RegisterFactory<Input::AnalogDevice>("analog_from_button",
- std::make_shared<InputCommon::AnalogFromButton>());
+ std::make_shared<AnalogFromButton>());
+ motion_emu = std::make_shared<MotionEmu>();
+ Input::RegisterFactory<Input::MotionDevice>("motion_emu", motion_emu);
+
#ifdef HAVE_SDL2
SDL::Init();
#endif
@@ -29,6 +34,8 @@ void Shutdown() {
Input::UnregisterFactory<Input::ButtonDevice>("keyboard");
keyboard.reset();
Input::UnregisterFactory<Input::AnalogDevice>("analog_from_button");
+ Input::UnregisterFactory<Input::MotionDevice>("motion_emu");
+ motion_emu.reset();
#ifdef HAVE_SDL2
SDL::Shutdown();
@@ -39,6 +46,10 @@ Keyboard* GetKeyboard() {
return keyboard.get();
}
+MotionEmu* GetMotionEmu() {
+ return motion_emu.get();
+}
+
std::string GenerateKeyboardParam(int key_code) {
Common::ParamPackage param{
{"engine", "keyboard"}, {"code", std::to_string(key_code)},
diff --git a/src/input_common/main.h b/src/input_common/main.h
index e7fb3890e..5604f0fa8 100644
--- a/src/input_common/main.h
+++ b/src/input_common/main.h
@@ -19,6 +19,11 @@ class Keyboard;
/// Gets the keyboard button device factory.
Keyboard* GetKeyboard();
+class MotionEmu;
+
+/// Gets the motion emulation factory.
+MotionEmu* GetMotionEmu();
+
/// Generates a serialized param package for creating a keyboard button device
std::string GenerateKeyboardParam(int key_code);
diff --git a/src/input_common/motion_emu.cpp b/src/input_common/motion_emu.cpp
new file mode 100644
index 000000000..a1761f184
--- /dev/null
+++ b/src/input_common/motion_emu.cpp
@@ -0,0 +1,165 @@
+// Copyright 2017 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include <chrono>
+#include <mutex>
+#include <thread>
+#include <tuple>
+#include "common/math_util.h"
+#include "common/quaternion.h"
+#include "common/thread.h"
+#include "common/vector_math.h"
+#include "input_common/motion_emu.h"
+
+namespace InputCommon {
+
+// Implementation class of the motion emulation device
+class MotionEmuDevice {
+public:
+ MotionEmuDevice(int update_millisecond, float sensitivity)
+ : update_millisecond(update_millisecond),
+ update_duration(std::chrono::duration_cast<std::chrono::steady_clock::duration>(
+ std::chrono::milliseconds(update_millisecond))),
+ sensitivity(sensitivity), motion_emu_thread(&MotionEmuDevice::MotionEmuThread, this) {}
+
+ ~MotionEmuDevice() {
+ if (motion_emu_thread.joinable()) {
+ shutdown_event.Set();
+ motion_emu_thread.join();
+ }
+ }
+
+ void BeginTilt(int x, int y) {
+ mouse_origin = Math::MakeVec(x, y);
+ is_tilting = true;
+ }
+
+ void Tilt(int x, int y) {
+ auto mouse_move = Math::MakeVec(x, y) - mouse_origin;
+ if (is_tilting) {
+ std::lock_guard<std::mutex> guard(tilt_mutex);
+ if (mouse_move.x == 0 && mouse_move.y == 0) {
+ tilt_angle = 0;
+ } else {
+ tilt_direction = mouse_move.Cast<float>();
+ tilt_angle = MathUtil::Clamp(tilt_direction.Normalize() * sensitivity, 0.0f,
+ MathUtil::PI * 0.5f);
+ }
+ }
+ }
+
+ void EndTilt() {
+ std::lock_guard<std::mutex> guard(tilt_mutex);
+ tilt_angle = 0;
+ is_tilting = false;
+ }
+
+ std::tuple<Math::Vec3<float>, Math::Vec3<float>> GetStatus() {
+ std::lock_guard<std::mutex> guard(status_mutex);
+ return status;
+ }
+
+private:
+ const int update_millisecond;
+ const std::chrono::steady_clock::duration update_duration;
+ const float sensitivity;
+
+ Math::Vec2<int> mouse_origin;
+
+ std::mutex tilt_mutex;
+ Math::Vec2<float> tilt_direction;
+ float tilt_angle = 0;
+
+ bool is_tilting = false;
+
+ Common::Event shutdown_event;
+ std::thread motion_emu_thread;
+
+ std::tuple<Math::Vec3<float>, Math::Vec3<float>> status;
+ std::mutex status_mutex;
+
+ void MotionEmuThread() {
+ auto update_time = std::chrono::steady_clock::now();
+ Math::Quaternion<float> q = MakeQuaternion(Math::Vec3<float>(), 0);
+ Math::Quaternion<float> old_q;
+
+ while (!shutdown_event.WaitUntil(update_time)) {
+ update_time += update_duration;
+ old_q = q;
+
+ {
+ std::lock_guard<std::mutex> guard(tilt_mutex);
+
+ // Find the quaternion describing current 3DS tilting
+ q = MakeQuaternion(Math::MakeVec(-tilt_direction.y, 0.0f, tilt_direction.x),
+ tilt_angle);
+ }
+
+ auto inv_q = q.Inverse();
+
+ // Set the gravity vector in world space
+ auto gravity = Math::MakeVec(0.0f, -1.0f, 0.0f);
+
+ // Find the angular rate vector in world space
+ auto angular_rate = ((q - old_q) * inv_q).xyz * 2;
+ angular_rate *= 1000 / update_millisecond / MathUtil::PI * 180;
+
+ // Transform the two vectors from world space to 3DS space
+ gravity = QuaternionRotate(inv_q, gravity);
+ angular_rate = QuaternionRotate(inv_q, angular_rate);
+
+ // Update the sensor state
+ {
+ std::lock_guard<std::mutex> guard(status_mutex);
+ status = std::make_tuple(gravity, angular_rate);
+ }
+ }
+ }
+};
+
+// Interface wrapper held by input receiver as a unique_ptr. It holds the implementation class as
+// a shared_ptr, which is also observed by the factory class as a weak_ptr. In this way the factory
+// can forward all the inputs to the implementation only when it is valid.
+class MotionEmuDeviceWrapper : public Input::MotionDevice {
+public:
+ MotionEmuDeviceWrapper(int update_millisecond, float sensitivity) {
+ device = std::make_shared<MotionEmuDevice>(update_millisecond, sensitivity);
+ }
+
+ std::tuple<Math::Vec3<float>, Math::Vec3<float>> GetStatus() const {
+ return device->GetStatus();
+ }
+
+ std::shared_ptr<MotionEmuDevice> device;
+};
+
+std::unique_ptr<Input::MotionDevice> MotionEmu::Create(const Common::ParamPackage& params) {
+ int update_period = params.Get("update_period", 100);
+ float sensitivity = params.Get("sensitivity", 0.01f);
+ auto device_wrapper = std::make_unique<MotionEmuDeviceWrapper>(update_period, sensitivity);
+ // Previously created device is disconnected here. Having two motion devices for 3DS is not
+ // expected.
+ current_device = device_wrapper->device;
+ return std::move(device_wrapper);
+}
+
+void MotionEmu::BeginTilt(int x, int y) {
+ if (auto ptr = current_device.lock()) {
+ ptr->BeginTilt(x, y);
+ }
+}
+
+void MotionEmu::Tilt(int x, int y) {
+ if (auto ptr = current_device.lock()) {
+ ptr->Tilt(x, y);
+ }
+}
+
+void MotionEmu::EndTilt() {
+ if (auto ptr = current_device.lock()) {
+ ptr->EndTilt();
+ }
+}
+
+} // namespace InputCommon
diff --git a/src/input_common/motion_emu.h b/src/input_common/motion_emu.h
new file mode 100644
index 000000000..7a7e22467
--- /dev/null
+++ b/src/input_common/motion_emu.h
@@ -0,0 +1,46 @@
+// Copyright 2017 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "core/frontend/input.h"
+
+namespace InputCommon {
+
+class MotionEmuDevice;
+
+class MotionEmu : public Input::Factory<Input::MotionDevice> {
+public:
+ /**
+ * Creates a motion device emulated from mouse input
+ * @param params contains parameters for creating the device:
+ * - "update_period": update period in milliseconds
+ * - "sensitivity": the coefficient converting mouse movement to tilting angle
+ */
+ std::unique_ptr<Input::MotionDevice> Create(const Common::ParamPackage& params) override;
+
+ /**
+ * Signals that a motion sensor tilt has begun.
+ * @param x the x-coordinate of the cursor
+ * @param y the y-coordinate of the cursor
+ */
+ void BeginTilt(int x, int y);
+
+ /**
+ * Signals that a motion sensor tilt is occurring.
+ * @param x the x-coordinate of the cursor
+ * @param y the y-coordinate of the cursor
+ */
+ void Tilt(int x, int y);
+
+ /**
+ * Signals that a motion sensor tilt has ended.
+ */
+ void EndTilt();
+
+private:
+ std::weak_ptr<MotionEmuDevice> current_device;
+};
+
+} // namespace InputCommon