James Rowe
GitHub
commit
bbfa9d0635
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// Copyright 2016 Citra Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#include "common/math_util.h"
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#include "common/quaternion.h"
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#include "core/frontend/emu_window.h"
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#include "core/frontend/motion_emu.h"
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namespace Motion {
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static constexpr int update_millisecond = 100;
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static constexpr auto update_duration =
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std::chrono::duration_cast<std::chrono::steady_clock::duration>(
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std::chrono::milliseconds(update_millisecond));
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MotionEmu::MotionEmu(EmuWindow& emu_window)
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: motion_emu_thread(&MotionEmu::MotionEmuThread, this, std::ref(emu_window)) {}
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MotionEmu::~MotionEmu() {
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if (motion_emu_thread.joinable()) {
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shutdown_event.Set();
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motion_emu_thread.join();
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}
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}
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void MotionEmu::MotionEmuThread(EmuWindow& emu_window) {
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auto update_time = std::chrono::steady_clock::now();
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Math::Quaternion<float> q = MakeQuaternion(Math::Vec3<float>(), 0);
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Math::Quaternion<float> old_q;
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while (!shutdown_event.WaitUntil(update_time)) {
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update_time += update_duration;
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old_q = q;
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{
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std::lock_guard<std::mutex> guard(tilt_mutex);
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// Find the quaternion describing current 3DS tilting
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q = MakeQuaternion(Math::MakeVec(-tilt_direction.y, 0.0f, tilt_direction.x),
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tilt_angle);
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}
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auto inv_q = q.Inverse();
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// Set the gravity vector in world space
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auto gravity = Math::MakeVec(0.0f, -1.0f, 0.0f);
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// Find the angular rate vector in world space
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auto angular_rate = ((q - old_q) * inv_q).xyz * 2;
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angular_rate *= 1000 / update_millisecond / MathUtil::PI * 180;
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// Transform the two vectors from world space to 3DS space
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gravity = QuaternionRotate(inv_q, gravity);
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angular_rate = QuaternionRotate(inv_q, angular_rate);
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// Update the sensor state
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emu_window.AccelerometerChanged(gravity.x, gravity.y, gravity.z);
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emu_window.GyroscopeChanged(angular_rate.x, angular_rate.y, angular_rate.z);
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}
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}
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void MotionEmu::BeginTilt(int x, int y) {
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mouse_origin = Math::MakeVec(x, y);
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is_tilting = true;
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}
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void MotionEmu::Tilt(int x, int y) {
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constexpr float SENSITIVITY = 0.01f;
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auto mouse_move = Math::MakeVec(x, y) - mouse_origin;
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if (is_tilting) {
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std::lock_guard<std::mutex> guard(tilt_mutex);
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if (mouse_move.x == 0 && mouse_move.y == 0) {
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tilt_angle = 0;
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} else {
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tilt_direction = mouse_move.Cast<float>();
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tilt_angle = MathUtil::Clamp(tilt_direction.Normalize() * SENSITIVITY, 0.0f,
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MathUtil::PI * 0.5f);
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}
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}
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}
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void MotionEmu::EndTilt() {
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std::lock_guard<std::mutex> guard(tilt_mutex);
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tilt_angle = 0;
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is_tilting = false;
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}
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} // namespace Motion
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@ -1,52 +0,0 @@
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// Copyright 2016 Citra Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#pragma once
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#include "common/thread.h"
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#include "common/vector_math.h"
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class EmuWindow;
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namespace Motion {
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class MotionEmu final {
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public:
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MotionEmu(EmuWindow& emu_window);
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~MotionEmu();
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/**
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* Signals that a motion sensor tilt has begun.
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* @param x the x-coordinate of the cursor
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* @param y the y-coordinate of the cursor
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*/
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void BeginTilt(int x, int y);
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/**
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* Signals that a motion sensor tilt is occurring.
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* @param x the x-coordinate of the cursor
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* @param y the y-coordinate of the cursor
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*/
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void Tilt(int x, int y);
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/**
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* Signals that a motion sensor tilt has ended.
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*/
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void EndTilt();
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private:
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Math::Vec2<int> mouse_origin;
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std::mutex tilt_mutex;
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Math::Vec2<float> tilt_direction;
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float tilt_angle = 0;
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bool is_tilting = false;
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Common::Event shutdown_event;
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std::thread motion_emu_thread;
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void MotionEmuThread(EmuWindow& emu_window);
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};
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} // namespace Motion
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@ -0,0 +1,165 @@
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// Copyright 2017 Citra Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#include <chrono>
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#include <mutex>
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#include <thread>
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#include <tuple>
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#include "common/math_util.h"
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#include "common/quaternion.h"
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#include "common/thread.h"
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#include "common/vector_math.h"
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#include "input_common/motion_emu.h"
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namespace InputCommon {
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// Implementation class of the motion emulation device
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class MotionEmuDevice {
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public:
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MotionEmuDevice(int update_millisecond, float sensitivity)
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: update_millisecond(update_millisecond),
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update_duration(std::chrono::duration_cast<std::chrono::steady_clock::duration>(
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std::chrono::milliseconds(update_millisecond))),
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sensitivity(sensitivity), motion_emu_thread(&MotionEmuDevice::MotionEmuThread, this) {}
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~MotionEmuDevice() {
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if (motion_emu_thread.joinable()) {
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shutdown_event.Set();
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motion_emu_thread.join();
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}
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}
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void BeginTilt(int x, int y) {
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mouse_origin = Math::MakeVec(x, y);
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is_tilting = true;
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}
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void Tilt(int x, int y) {
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auto mouse_move = Math::MakeVec(x, y) - mouse_origin;
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if (is_tilting) {
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std::lock_guard<std::mutex> guard(tilt_mutex);
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if (mouse_move.x == 0 && mouse_move.y == 0) {
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tilt_angle = 0;
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} else {
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tilt_direction = mouse_move.Cast<float>();
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tilt_angle = MathUtil::Clamp(tilt_direction.Normalize() * sensitivity, 0.0f,
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MathUtil::PI * 0.5f);
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}
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}
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}
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void EndTilt() {
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std::lock_guard<std::mutex> guard(tilt_mutex);
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tilt_angle = 0;
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is_tilting = false;
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}
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std::tuple<Math::Vec3<float>, Math::Vec3<float>> GetStatus() {
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std::lock_guard<std::mutex> guard(status_mutex);
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return status;
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}
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private:
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const int update_millisecond;
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const std::chrono::steady_clock::duration update_duration;
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const float sensitivity;
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Math::Vec2<int> mouse_origin;
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std::mutex tilt_mutex;
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Math::Vec2<float> tilt_direction;
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float tilt_angle = 0;
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bool is_tilting = false;
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Common::Event shutdown_event;
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std::thread motion_emu_thread;
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std::tuple<Math::Vec3<float>, Math::Vec3<float>> status;
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std::mutex status_mutex;
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void MotionEmuThread() {
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auto update_time = std::chrono::steady_clock::now();
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Math::Quaternion<float> q = MakeQuaternion(Math::Vec3<float>(), 0);
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Math::Quaternion<float> old_q;
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while (!shutdown_event.WaitUntil(update_time)) {
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update_time += update_duration;
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old_q = q;
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{
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std::lock_guard<std::mutex> guard(tilt_mutex);
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// Find the quaternion describing current 3DS tilting
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q = MakeQuaternion(Math::MakeVec(-tilt_direction.y, 0.0f, tilt_direction.x),
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tilt_angle);
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}
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auto inv_q = q.Inverse();
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// Set the gravity vector in world space
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auto gravity = Math::MakeVec(0.0f, -1.0f, 0.0f);
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// Find the angular rate vector in world space
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auto angular_rate = ((q - old_q) * inv_q).xyz * 2;
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angular_rate *= 1000 / update_millisecond / MathUtil::PI * 180;
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// Transform the two vectors from world space to 3DS space
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gravity = QuaternionRotate(inv_q, gravity);
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angular_rate = QuaternionRotate(inv_q, angular_rate);
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// Update the sensor state
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{
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std::lock_guard<std::mutex> guard(status_mutex);
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status = std::make_tuple(gravity, angular_rate);
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}
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}
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}
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};
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// Interface wrapper held by input receiver as a unique_ptr. It holds the implementation class as
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// a shared_ptr, which is also observed by the factory class as a weak_ptr. In this way the factory
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// can forward all the inputs to the implementation only when it is valid.
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class MotionEmuDeviceWrapper : public Input::MotionDevice {
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public:
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MotionEmuDeviceWrapper(int update_millisecond, float sensitivity) {
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device = std::make_shared<MotionEmuDevice>(update_millisecond, sensitivity);
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}
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std::tuple<Math::Vec3<float>, Math::Vec3<float>> GetStatus() const {
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return device->GetStatus();
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}
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std::shared_ptr<MotionEmuDevice> device;
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};
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std::unique_ptr<Input::MotionDevice> MotionEmu::Create(const Common::ParamPackage& params) {
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int update_period = params.Get("update_period", 100);
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float sensitivity = params.Get("sensitivity", 0.01f);
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auto device_wrapper = std::make_unique<MotionEmuDeviceWrapper>(update_period, sensitivity);
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// Previously created device is disconnected here. Having two motion devices for 3DS is not
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// expected.
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current_device = device_wrapper->device;
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return std::move(device_wrapper);
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}
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void MotionEmu::BeginTilt(int x, int y) {
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if (auto ptr = current_device.lock()) {
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ptr->BeginTilt(x, y);
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}
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}
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void MotionEmu::Tilt(int x, int y) {
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if (auto ptr = current_device.lock()) {
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ptr->Tilt(x, y);
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}
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}
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void MotionEmu::EndTilt() {
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if (auto ptr = current_device.lock()) {
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ptr->EndTilt();
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}
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}
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} // namespace InputCommon
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@ -0,0 +1,46 @@
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// Copyright 2017 Citra Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#pragma once
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#include "core/frontend/input.h"
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namespace InputCommon {
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class MotionEmuDevice;
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class MotionEmu : public Input::Factory<Input::MotionDevice> {
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public:
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/**
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* Creates a motion device emulated from mouse input
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* @param params contains parameters for creating the device:
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* - "update_period": update period in milliseconds
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* - "sensitivity": the coefficient converting mouse movement to tilting angle
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*/
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std::unique_ptr<Input::MotionDevice> Create(const Common::ParamPackage& params) override;
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/**
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* Signals that a motion sensor tilt has begun.
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* @param x the x-coordinate of the cursor
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* @param y the y-coordinate of the cursor
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*/
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void BeginTilt(int x, int y);
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/**
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* Signals that a motion sensor tilt is occurring.
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* @param x the x-coordinate of the cursor
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* @param y the y-coordinate of the cursor
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*/
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void Tilt(int x, int y);
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/**
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* Signals that a motion sensor tilt has ended.
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*/
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void EndTilt();
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private:
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std::weak_ptr<MotionEmuDevice> current_device;
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};
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} // namespace InputCommon
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