Add Touch input handling

openVulkanoCpp/Host/iOS/OpenVulkanoView.h

@@ -0,0 +1,17 @@
+/*
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+#pragma once
+
+#import <UIKit/UIKit.h>
+#import <MetalKit/MTKView.h>
+
+#pragma mark -
+#pragma mark OpenVulkanoView
+
+//@interface OpenVulkanoView : UIView
+@interface OpenVulkanoView : MTKView
+@end

openVulkanoCpp/Host/iOS/OpenVulkanoView.mm

@@ -0,0 +1,125 @@
+/*
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+#import "OpenVulkanoView.h"
+
+#include "Input/Touch/InputDeviceTouch.hpp"
+#include "Input/InputManager.hpp"
+#include <map>
+
+#pragma mark -
+#pragma mark OpenVulkanoView
+
+using namespace OpenVulkano;
+
+@interface OpenVulkanoView()
+{
+	CADisplayLink * m_displayLink;
+	std::map<UITouch*, int32_t> m_touchToIdMap;
+	Input::InputDeviceTouch m_touchDevice;
+}
+@end
+
+@implementation OpenVulkanoView
+/** Returns a Metal-compatible layer. */
++(Class) layerClass { return [CAMetalLayer class]; }
+
+- (id)initWithFrame:(CGRect)frame {
+	self = [super initWithFrame:frame];
+	if (self) {
+		[self commonInit];
+	}
+	return self;
+}
+
+- (id)initWithCoder:(NSCoder *)aDecoder {
+	self = [super initWithCoder:aDecoder];
+	if (self) {
+		[self commonInit];
+	}
+	return self;
+}
+
+- (void)commonInit {
+	[self setMultipleTouchEnabled:YES];
+	m_touchDevice.Init(); //TODO link window
+	Input::InputManager::GetInstance()->RegisterInputDevice(&m_touchDevice);
+}
+
+- (void)dealloc {
+	for(auto& it : m_touchToIdMap) {
+		m_touchDevice.RemoveTouch(it.second);
+	}
+	Input::InputManager::GetInstance()->UnregisterInputDevice(&m_touchDevice);
+	m_touchDevice.Close();
+	[super dealloc];
+}
+
+- (Math::Vector2f)getTouchPosition:(UITouch*)touch
+{
+	CGPoint uitouchLocation = [touch locationInView:touch.view];
+	return { uitouchLocation.x * self.contentScaleFactor, uitouchLocation.y * self.contentScaleFactor };
+}
+
+- (void)touchesBegan:(NSSet*)inTouches withEvent:(UIEvent*)inEvent
+{
+	for (UITouch* touch in inTouches)
+	{
+		Math::Vector2f touchLocation = [self getTouchPosition: touch];
+		uint32_t touchId = m_touchDevice.AddTouch(touchLocation);
+		m_touchDevice.TouchDown(touchId);
+		m_touchToIdMap.insert(std::make_pair(touch, touchId));
+	}
+}
+
+- (void)touchesCancelled:(NSSet*)inTouches withEvent:(UIEvent*)inEvent
+{
+	for (UITouch* touch in inTouches)
+	{
+		Math::Vector2f touchLocation = [self getTouchPosition: touch];
+
+		auto it = m_touchToIdMap.find(touch);
+		if (it != m_touchToIdMap.end())
+		{
+			m_touchDevice.TouchUp(it->second);
+			m_touchDevice.RemoveTouch(it->second);
+			m_touchToIdMap.erase(it);
+		}
+	}
+}
+
+- (void)touchesEnded:(NSSet*)inTouches withEvent:(UIEvent*)inEvent
+{
+	for (UITouch* touch in inTouches)
+	{
+		Math::Vector2f touchLocation = [self getTouchPosition: touch];
+
+		auto it = m_touchToIdMap.find(touch);
+		if (it != m_touchToIdMap.end())
+		{
+			m_touchDevice.TouchUp(it->second);
+			m_touchDevice.RemoveTouch(it->second);
+			m_touchToIdMap.erase(it);
+		}
+	}
+}
+
+- (void)touchesMoved:(NSSet*)inTouches withEvent:(UIEvent*)inEvent
+{
+	for (UITouch* touch in inTouches)
+	{
+		Math::Vector2f touchLocation = [self getTouchPosition: touch];
+
+		auto it = m_touchToIdMap.find(touch);
+		if (it != m_touchToIdMap.end())
+		{
+			m_touchDevice.TouchMoved(it->second, touchLocation);
+		}
+	}
+}
+
+@end
+

openVulkanoCpp/Host/iOS/OpenVulkanoViewController.h

@@ -5,7 +5,6 @@
  */
 
 #import <UIKit/UIKit.h>
-#import <MetalKit/MTKView.h>
 
 #pragma mark -
 #pragma mark OpenVulkanoViewController
@@ -14,10 +13,3 @@
 -(void*) makeGraphicsApp;
 @end
 
-
-#pragma mark -
-#pragma mark OpenVulkanoView
-
-@interface OpenVulkanoView : MTKView
-@end
-

openVulkanoCpp/Host/iOS/OpenVulkanoViewController.mm

@@ -11,6 +11,7 @@
 #include "ExampleApps/CubesExampleApp.hpp"
 #include "Base/UI/IVulkanWindow.hpp"
 
+#import <MetalKit/MTKView.h>
 
 #pragma mark -
 #pragma mark OpenVulkanoViewController
@@ -203,13 +204,3 @@ public:
 @end
 
 
-#pragma mark -
-#pragma mark OpenVulkanoView
-
-@implementation OpenVulkanoView
-
-/** Returns a Metal-compatible layer. */
-+(Class) layerClass { return [CAMetalLayer class]; }
-
-@end
-

openVulkanoCpp/Input/InputKey.hpp

@@ -242,6 +242,34 @@ namespace OpenVulkano::Input
 			};
 		};
 
+		class Touch
+		{
+		public:
+			enum Button: int16_t
+			{
+				BUTTON_TAP = 0,
+				BUTTON_TWO_FINGER_TAP
+			};
+
+			enum Axis : int16_t
+			{
+				AXIS_TAP_X = 0,
+				AXIS_TAP_Y,
+				AXIS_TAP_DURATION,
+				AXIS_TAP_TWO_FINGERS_X,
+				AXIS_TAP_TWO_FINGERS_Y,
+				AXIS_TAP_TWO_FINGER_DURATION,
+				AXIS_PAN_X,
+				AXIS_PAN_Y,
+				AXIS_PAN_TWO_FINGERS_X,
+				AXIS_PAN_TWO_FINGERS_Y,
+				AXIS_PINCH,
+				AXIS_PINCH_CENTER_X,
+				AXIS_PINCH_CENTER_Y,
+				AXIS_LAST = AXIS_PINCH_CENTER_Y
+			};
+		};
+
 	private:
 		InputDeviceType deviceType;
 		InputType type;
@@ -268,6 +296,14 @@ namespace OpenVulkano::Input
 			deviceType(InputDeviceType::CONTROLLER), type(InputType::AXIS), key(controllerAxis)
 		{}
 
+		InputKey(Touch::Button touchButton) :
+			deviceType(InputDeviceType::TOUCH), type(InputType::BUTTON), key(touchButton)
+		{}
+
+		InputKey(Touch::Axis touchAxis) :
+			deviceType(InputDeviceType::TOUCH), type(InputType::AXIS), key(touchAxis)
+		{}
+
 		[[nodiscard]] InputDeviceType GetInputDeviceType() const { return deviceType; }
 
 		[[nodiscard]] InputType GetInputType() const { return type; }

openVulkanoCpp/Input/Touch/Gesture.hpp

@@ -0,0 +1,49 @@
+/*
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+#pragma once
+
+#include <cstdint>
+
+namespace OpenVulkano::Input
+{
+	class Touch;
+	class GestureProcessor;
+
+	class Gesture
+	{
+		friend class GestureProcessor;
+
+		uint32_t m_gestureType = -1;
+		bool m_active = false;
+		GestureProcessor* m_processor = nullptr;
+
+	public:
+		static constexpr uint32_t TYPE_TAP = 0;
+		static constexpr uint32_t TYPE_PAN = 1;
+		static constexpr uint32_t TYPE_PINCH = 2;
+
+		Gesture(uint32_t gestureType) : m_gestureType(gestureType) {}
+		virtual ~Gesture() = default;
+
+		virtual void Cancel() {}
+		virtual void Reset() {}
+
+		virtual void TouchDown(const Touch& touch) {}
+		virtual void TouchUp(const Touch& touch) {}
+		virtual void TouchMoved(const Touch& touch) {}
+
+		void SetActive(bool active) { m_active = active; }
+
+		[[nodiscard]] bool IsActive() const { return m_active; }
+
+		[[nodiscard]] uint32_t GetType() const { return m_gestureType; }
+
+		// Impl in GestureProcessor.cpp
+		bool ResolveConflicts();
+		void RemoveFromProcessor();
+	};
+}

openVulkanoCpp/Input/Touch/GestureInfos.hpp

@@ -0,0 +1,34 @@
+/*
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+#pragma once
+
+#include "Math/Math.hpp"
+#include <chrono>
+
+namespace OpenVulkano::Input
+{
+	struct PanInfo
+	{
+		Math::Vector2f position;
+		Math::Vector2f distance;
+		Math::Vector2f delta;
+
+		float scale = 0.0f;
+	};
+
+	struct PinchInfo
+	{
+		Math::Vector2f position;
+		float scale = 0.0f;
+	};
+
+	struct TapInfo
+	{
+		Math::Vector2f position;
+		std::chrono::seconds duration;
+	};
+}

openVulkanoCpp/Input/Touch/GesturePan.cpp

@@ -0,0 +1,174 @@
+/*
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+#include "GesturePan.hpp"
+
+namespace OpenVulkano::Input
+{
+	namespace
+	{
+		constexpr float MIN_DISTANCE = 20;
+		constexpr float MIN_DISTANCE2 = MIN_DISTANCE * MIN_DISTANCE;
+	}
+
+	void GesturePan::TryStart(const Touch& touch)
+	{
+		uint32_t dragCount = 0, existingActive = 0;
+		for (const auto& t : m_pendingTouches)
+		{
+			if (t.isDrag) dragCount++;
+			if (t.active) existingActive++;
+		}
+
+		if (dragCount >= m_requiredTouchInputs)
+		{
+			if (!IsActive() && !ResolveConflicts()) return;
+
+			uint32_t activeCount = existingActive;
+			for (auto& t : m_pendingTouches)
+			{
+				if (t.isDrag && !t.active && activeCount < m_requiredTouchInputs)
+				{
+					t.active = true;
+					activeCount++;
+				}
+			}
+
+			m_paused = false;
+
+			if (IsActive())
+			{
+				m_panInfo.position = CalculatePosition();
+
+				OnPanMoved(this, m_panInfo);
+			}
+			else
+			{
+				SetActive(true);
+				m_panInfo.position = CalculatePosition();
+				m_panInfo.distance = Math::Vector2f();
+				m_panInfo.delta = Math::Vector2f();
+
+				OnPanStarted.NotifyAll(this, m_panInfo);
+			}
+		}
+	}
+
+	Math::Vector2f GesturePan::CalculatePosition() const
+	{
+		Math::Vector2f gesturePos = Math::Vector2f();
+		if (m_pendingTouches.size() >= m_requiredTouchInputs && IsActive() && !m_paused)
+		{
+			int activePointers = 0;
+			for (const auto& t : m_pendingTouches)
+			{
+				gesturePos += t.currentPosition;
+				activePointers++;
+			}
+			gesturePos /= activePointers > 0 ? activePointers : 1;
+		}
+		return gesturePos;
+	}
+
+	void GesturePan::Cancel()
+	{
+		for (auto& pointer : m_pendingTouches)
+		{
+			pointer.active = false;
+		}
+
+		SetActive(false);
+		m_paused = false;
+
+		m_panInfo.delta = Math::Vector2f();
+		OnPanEnded(this, m_panInfo);
+
+		m_panInfo.distance = Math::Vector2f();
+		m_panInfo.position = Math::Vector2f();
+	}
+
+	void GesturePan::TouchDown(const Touch& touch)
+	{
+		TouchInfo ti;
+		ti.touchId = touch.GetId();
+		ti.currentPosition = touch.GetPosition();
+		ti.initialPosition = touch.GetPosition();
+
+		m_pendingTouches.push_back(ti);
+		if (IsActive())
+		{
+			m_panInfo.position = CalculatePosition();
+		}
+	}
+
+	void GesturePan::TouchUp(const Touch& touch)
+	{
+		if (!m_pendingTouches.empty())
+		{
+			for (auto touchIter = m_pendingTouches.begin(); touchIter != m_pendingTouches.end(); touchIter++)
+			{
+				if (touch.GetId() == touchIter->touchId)
+				{
+					if (touchIter->active) m_paused = true;
+
+					m_pendingTouches.erase(touchIter);
+					break;
+				}
+			}
+
+			if (m_pendingTouches.empty() && IsActive())
+			{
+				Cancel();
+			}
+			else if (IsActive())
+			{
+				m_panInfo.position = CalculatePosition();
+			}
+		}
+	}
+
+	void GesturePan::TouchMoved(const Touch& touch)
+	{
+		if (m_pendingTouches.size() > 0)
+		{
+			bool isPending = false;
+			bool isActive = false;
+			for (auto& t : m_pendingTouches)
+			{
+				if (touch.GetId() == t.touchId)
+				{
+					t.currentPosition = touch.GetPosition();
+
+					Math::Vector2f displacement = t.currentPosition - t.initialPosition;
+					if (Math::Utils::length2(displacement) > MIN_DISTANCE2)
+					{
+						t.isDrag = true;
+					}
+
+					if (t.active) isActive = true;
+
+					isPending = true;
+				}
+			}
+
+			if (isPending)
+			{
+				if (!IsActive() || m_paused)
+				{
+					TryStart(touch);
+				}
+				else if (isActive)
+				{
+					Math::Vector2f newPosition = CalculatePosition();
+					m_panInfo.delta = newPosition - m_panInfo.position;
+					m_panInfo.distance += m_panInfo.delta;
+					m_panInfo.position = newPosition;
+					OnPanMoved.NotifyAll(this, m_panInfo);
+				}
+			}
+		}
+	}
+}

openVulkanoCpp/Input/Touch/GesturePan.hpp

@@ -0,0 +1,47 @@
+/*
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+#pragma once
+
+#include "Gesture.hpp"
+#include "TouchInfo.hpp"
+#include "GestureInfos.hpp"
+#include "Base/Event.hpp"
+
+namespace OpenVulkano::Input
+{
+
+	class GesturePan final : public Gesture
+	{
+		PanInfo m_panInfo;
+		std::vector<TouchInfo> m_pendingTouches;
+		uint32_t m_requiredTouchInputs;
+		bool m_paused = false;
+
+		void TryStart(const Touch& touch);
+
+		Math::Vector2f CalculatePosition() const;
+
+	public:
+		GesturePan(uint32_t requiredTouchInputs)
+				: Gesture(TYPE_PAN), m_requiredTouchInputs(requiredTouchInputs)
+		{}
+
+		void Cancel() override;
+
+		void Reset() override
+		{
+			if (IsActive()) Cancel();
+			m_pendingTouches.clear();
+		}
+
+		void TouchDown(const Touch& touch) override;
+		void TouchUp(const Touch& touch) override;
+		void TouchMoved(const Touch& touch) override;
+
+		Event<GesturePan*, PanInfo&> OnPanStarted, OnPanMoved, OnPanEnded;
+	};
+}

openVulkanoCpp/Input/Touch/GesturePinch.cpp

@@ -0,0 +1,244 @@
+/*
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+#include "GesturePinch.hpp"
+
+namespace OpenVulkano::Input
+{
+	namespace
+	{
+		constexpr float MIN_DISTANCE = 2;
+		constexpr float MIN_DISTANCE2 = MIN_DISTANCE * MIN_DISTANCE;
+		constexpr uint32_t REQUIRED_TOUCHES = 2;
+	}
+
+	void GesturePinch::TryStart()
+	{
+		uint32_t dragCount = 0, existingActive = 0;
+
+		for (const auto& t : m_pendingTouches)
+		{
+			if (t.isDrag) dragCount++;
+			if (t.active) existingActive++;
+		}
+
+		if (dragCount >= REQUIRED_TOUCHES)
+		{
+			if (!IsActive() && !ResolveConflicts()) return;
+
+			uint32_t activeCount = existingActive;
+
+			for (auto& t : m_pendingTouches)
+			{
+				if (t.isDrag && !t.active && activeCount < REQUIRED_TOUCHES)
+				{
+					t.active = true;
+					++activeCount;
+				}
+			}
+
+			m_paused = false;
+
+			if (!IsActive())
+			{
+				SetActive(true);
+
+				m_initialDistance = CalculateDistance();
+
+				float newDistance = m_initialDistance;
+
+				if (m_initialDistance > 0)
+				{
+					m_pinchInfo.scale = newDistance > 0 ? m_initialDistance / newDistance : m_lastDistance;
+					m_pinchInfo.position = CalculateCenter();
+				}
+				else
+				{
+					m_pinchInfo.scale = 1.0f;
+					m_pinchInfo.position = m_pendingTouches.front().currentPosition;
+				}
+
+				if (m_lastDistance == 0)
+				{
+					m_lastDistance = newDistance;
+				}
+
+				// fire event
+				OnPinchStarted.NotifyAll(this, m_pinchInfo);
+
+				m_lastDistance = newDistance;
+			}
+			else
+			{
+				OnPinchMoved.NotifyAll(this, m_pinchInfo);
+			}
+		}
+	}
+
+	float GesturePinch::LinearLength(const std::vector<Math::Vector2f>& points) const
+	{
+		auto start = points.begin();
+		if (start == points.end()) return 0;
+
+		auto finish = start + 1;
+		float sum = 0;
+
+		while (finish != points.end())
+		{
+			Math::Vector2f displacement = *start - *finish;
+			sum += Math::Utils::length(displacement);
+			start = finish++;
+		}
+
+		return sum;
+	}
+
+	float GesturePinch::CalculateDistance() const
+	{
+		if (m_pendingTouches.size() >= REQUIRED_TOUCHES && IsActive() && !m_paused)
+		{
+			std::vector<Math::Vector2f> positions;
+			for (const auto& t : m_pendingTouches)
+			{
+				if (t.active) positions.push_back(t.currentPosition);
+			}
+			return LinearLength(positions);
+		}
+		return 0;
+	}
+
+	Math::Vector2f GesturePinch::CalculateCenter() const
+	{
+		auto center = Math::Vector2f();
+		if (m_pendingTouches.size() >= REQUIRED_TOUCHES && IsActive() && !m_paused)
+		{
+			std::vector<Math::Vector2f> positions;
+			for (const auto& t : m_pendingTouches)
+			{
+				if (t.active) positions.push_back(t.currentPosition);
+			}
+			for (const auto& position : positions)
+			{
+				center += position / (float)positions.size();
+			}
+		}
+		return center;
+	}
+
+	void GesturePinch::Cancel()
+	{
+		for (auto& t : m_pendingTouches)
+		{
+			t.active = false;
+		}
+		SetActive(false);
+		m_paused = false;
+		OnPinchEnded.NotifyAll(this, m_pinchInfo);
+		m_pinchInfo.position = {};
+	}
+
+	void GesturePinch::TouchDown(const Touch& touch)
+	{
+		TouchInfo ti;
+		ti.touchId = touch.GetId();
+		ti.currentPosition = touch.GetPosition();
+		ti.initialPosition = touch.GetPosition();
+		ti.delta = touch.GetPosition() - touch.GetLastPosition();
+
+		m_pendingTouches.push_back(ti);
+	}
+
+	void GesturePinch::TouchMoved(const Touch& touch)
+	{
+		if (!m_pendingTouches.empty())
+		{
+			bool isPending = false;
+			bool isActive = false;
+			bool oneIsDrag = false;
+			for (auto& t : m_pendingTouches)
+			{
+				if (touch.GetId() == t.touchId)
+				{
+					t.currentPosition = touch.GetPosition();
+					t.delta = touch.GetPosition() - t.initialPosition;
+
+					Math::Vector2f displacement = t.currentPosition - t.initialPosition;
+
+					if (Math::Utils::length2(displacement) > MIN_DISTANCE2)
+					{
+						t.isDrag = true;
+						oneIsDrag = true;
+					}
+
+					if (t.active) isActive = true;
+
+					isPending = true;
+				}
+			}
+
+
+			if (oneIsDrag)
+			{
+				// Just to activate both cursors
+				for (auto& t : m_pendingTouches)
+				{
+					t.isDrag = true;
+				}
+			}
+
+			if (isPending)
+			{
+				if (!IsActive() || m_paused)
+				{
+					TryStart();
+				}
+				else if (isActive)
+				{
+					float newDistance = CalculateDistance();
+
+					if (m_lastDistance == 0)
+					{
+						m_lastDistance = newDistance;
+					}
+
+					if (m_initialDistance > 0)
+					{
+						m_pinchInfo.scale = newDistance > 0 ? m_initialDistance / newDistance : m_lastDistance;
+						m_pinchInfo.position = CalculateCenter();
+					}
+					else
+					{
+						m_pinchInfo.scale = 1.0f;
+						m_pinchInfo.position = m_pendingTouches.front().currentPosition;
+					}
+
+					OnPinchMoved.NotifyAll(this, m_pinchInfo);
+
+					m_lastDistance = newDistance;
+				}
+			}
+		}
+	}
+
+	void GesturePinch::TouchUp(const Touch& touch)
+	{
+		if (!m_pendingTouches.empty())
+		{
+			for (auto touchIter = m_pendingTouches.begin(); touchIter != m_pendingTouches.end(); touchIter++)
+			{
+				if (touch.GetId() == touchIter->touchId)
+				{
+					if (touchIter->active) m_paused = true;
+					
+					m_pendingTouches.erase(touchIter);
+					break;
+				}
+			}
+
+			if (m_pendingTouches.empty() && IsActive()) Cancel();
+		}
+	}
+}

openVulkanoCpp/Input/Touch/GesturePinch.hpp

@@ -0,0 +1,49 @@
+/*
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+#pragma once
+
+#include "Gesture.hpp"
+#include "TouchInfo.hpp"
+#include "GestureInfos.hpp"
+#include "Base/Event.hpp"
+
+namespace OpenVulkano::Input
+{
+	class GesturePinch final : public Gesture
+	{
+		PinchInfo m_pinchInfo;
+		std::vector<TouchInfo> m_pendingTouches;
+		float m_initialDistance = 0, m_lastDistance;
+		bool m_paused = false;
+
+		void TryStart();
+
+		float LinearLength(std::vector<Math::Vector2f> const &points) const;
+
+		float CalculateDistance() const;
+
+		Math::Vector2f CalculateCenter() const;
+
+	public:
+		GesturePinch() : Gesture(TYPE_PINCH) {}
+
+		void Cancel() override;
+
+		void Reset() override
+		{
+			if (IsActive()) Cancel();
+			m_pendingTouches.clear();
+			m_initialDistance = 0;
+		}
+
+		void TouchDown(const Touch& touch) override;
+		void TouchUp(const Touch& touch) override;
+		void TouchMoved(const Touch& touch) override;
+
+		Event<GesturePinch*, PinchInfo&> OnPinchStarted, OnPinchMoved, OnPinchEnded;
+	};
+}

openVulkanoCpp/Input/Touch/GestureProcessor.cpp

@@ -0,0 +1,142 @@
+/*
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+#include "GestureProcessor.hpp"
+#include "Touch.hpp"
+#include "Gesture.hpp"
+#include "Base/Logger.hpp"
+
+namespace OpenVulkano::Input
+{
+	bool Gesture::ResolveConflicts()
+	{
+		if (m_processor) return m_processor->ResolveConflicts(this);
+		return false;
+	}
+
+	void Gesture::RemoveFromProcessor()
+	{
+		if (m_processor) m_processor->RemoveGesture(this);
+	}
+
+	GestureProcessor::GestureProcessor()
+			: m_gesturePan(1), m_gesturePanTwoFingers(2)
+	{}
+
+	GestureProcessor::~GestureProcessor()
+	{
+		if (!m_gestures.empty()) Close();
+	}
+
+	void GestureProcessor::Init()
+	{
+		AddGesture(&m_gesturePan);
+		AddGesture(&m_gesturePanTwoFingers);
+		AddGesture(&m_gesturePinch);
+		AddGesture(&m_gestureTap);
+		m_conflictResolutionDelegate = [this](const Gesture* existing, const Gesture* newGesture) {
+			if(existing == &m_gesturePan && newGesture != &m_gestureTap)
+			{
+				Logger::INPUT->debug("Replacing pan with multitouch gesture");
+				return ConflictResult::NewGesture;
+			}
+			return ConflictResult::BothGestures;
+		};
+	}
+
+	void GestureProcessor::Close()
+	{
+		for(const auto& gesture : m_gestures)
+		{
+			gesture->m_processor = nullptr;
+		}
+		m_gestures.clear();
+		m_conflictResolutionDelegate = nullptr;
+	}
+
+	void GestureProcessor::AddGesture(Gesture* gesture)
+	{
+		gesture->m_processor = this;
+		m_gestures.push_back(gesture);
+	}
+
+	void GestureProcessor::RemoveGesture(OpenVulkano::Input::Gesture* gesture)
+	{
+		for (auto it = m_gestures.begin(); it != m_gestures.end(); it++)
+		{
+			if (*it == gesture)
+			{
+				(*it)->m_processor = nullptr;
+				m_gestures.erase(it);
+				break;
+			}
+		}
+	}
+
+	//region forward events
+	void GestureProcessor::Reset()
+	{
+		for (const auto& gesture : m_gestures)
+		{
+			gesture->Reset();
+		}
+	}
+
+	void GestureProcessor::TouchDown(const OpenVulkano::Input::Touch& touch)
+	{
+		for (const auto& gesture : m_gestures)
+		{
+			gesture->TouchDown(touch);
+		}
+	}
+
+	void GestureProcessor::TouchUp(const OpenVulkano::Input::Touch& touch)
+	{
+		for (const auto& gesture : m_gestures)
+		{
+			gesture->TouchUp(touch);
+		}
+	}
+
+	void GestureProcessor::TouchMoved(const OpenVulkano::Input::Touch& touch)
+	{
+		for (const auto& gesture : m_gestures)
+		{
+			gesture->TouchMoved(touch);
+		}
+	}
+	//endregion
+
+	bool GestureProcessor::ResolveConflicts(Gesture* gesture)
+	{
+		if (!m_conflictResolutionDelegate) return true;
+		bool canActivate = true;
+		for (const auto& g : m_gestures)
+		{
+			if (g != gesture && g->IsActive())
+			{
+				ConflictResult conflictResult = m_conflictResolutionDelegate(g, gesture);
+
+				switch (conflictResult)
+				{
+					case ConflictResult::NeitherGesture:
+						g->Reset();
+						canActivate = false;
+						break;
+					case ConflictResult::ExistingGesture:
+						canActivate = false;
+						break;
+					case ConflictResult::NewGesture:
+						g->Reset();
+						break;
+					case ConflictResult::BothGestures:
+						break;
+				}
+			}
+		}
+		return canActivate;
+	}
+}

openVulkanoCpp/Input/Touch/GestureProcessor.hpp

@@ -0,0 +1,63 @@
+/*
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+#pragma once
+
+#include "GesturePan.hpp"
+#include "GesturePinch.hpp"
+#include "GestureTap.hpp"
+#include <functional>
+#include <memory>
+#include <vector>
+
+namespace OpenVulkano::Input
+{
+	class GestureProcessor final
+	{
+		friend class InputDeviceTouch;
+
+		GesturePan m_gesturePan;
+		GesturePan m_gesturePanTwoFingers;
+		GesturePinch m_gesturePinch;
+		GestureTap m_gestureTap;
+		GestureTap m_gestureTapTwoFingers; // TODO
+		std::vector<Gesture*> m_gestures;
+
+	public:
+		GestureProcessor();
+		~GestureProcessor();
+
+		void Init();
+		void Close();
+
+		void AddGesture(Gesture* gesture);
+		void RemoveGesture(Gesture* gesture);
+		bool ResolveConflicts(Gesture* gesture);
+		void Reset();
+
+		void TouchDown(const Touch& touch);
+		void TouchUp(const Touch& touch);
+
+		void TouchMoved(const Touch& touch);
+
+		//region conflict resolution
+		enum class ConflictResult
+		{
+			NeitherGesture,
+			ExistingGesture,
+			NewGesture,
+			BothGestures
+		};
+
+		using ConflictResolutionDelegate = std::function<ConflictResult(const Gesture*, const Gesture*)>;
+
+		void SetConflictResolutionDelegate(const ConflictResolutionDelegate& delegate) { m_conflictResolutionDelegate = delegate; }
+
+	private:
+		ConflictResolutionDelegate m_conflictResolutionDelegate;
+		//endregion
+	};
+}

openVulkanoCpp/Input/Touch/GestureTap.cpp

@@ -0,0 +1,87 @@
+/*
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+#include "GestureTap.hpp"
+
+using namespace std::chrono_literals;
+
+namespace OpenVulkano::Input
+{
+	namespace
+	{
+		constexpr auto MAX_DURATION = 1s;
+		constexpr float MAX_DISTANCE = 12.0f;
+		constexpr float MAX_DISTANCE2 = MAX_DISTANCE * MAX_DISTANCE;
+	}
+
+	int GestureTap::GetTouchCount() const
+	{
+		return std::count_if(m_touchMap.begin(), m_touchMap.end(), [](const auto& t) { return t.second; });
+	}
+
+	void GestureTap::Cancel()
+	{
+		SetActive(false);
+		m_tapInfo.position = {};
+	}
+
+	void GestureTap::Reset()
+	{
+		Cancel();
+		m_touchMap.clear();
+		m_startTime = {};
+	}
+
+	void GestureTap::TouchMoved(const Touch& touch)
+	{
+		if (IsActive())
+		{
+			if ((std::chrono::steady_clock::now() - m_startTime > MAX_DURATION) ||
+				(Math::Utils::distance2(touch.GetPosition(), m_initialPoint) > MAX_DISTANCE2) ||
+				((m_distance += Math::Utils::distance2(touch.GetPosition(), touch.GetLastPosition()) > 3 * MAX_DISTANCE2)))
+			{
+				Cancel();
+			}
+		}
+		else
+		{
+			m_tapInfo.position = touch.GetPosition();
+		}
+	}
+
+	void GestureTap::TouchDown(const Touch& touch)
+	{
+		m_touchMap[touch.GetId()] = true;
+		if (1 == m_touchMap.size()) // single tap only
+		{
+			m_startTime = std::chrono::steady_clock::now();
+			m_initialPoint = touch.GetPosition();
+			m_distance = 0.0f;
+			m_tapInfo.position = m_initialPoint;
+			SetActive(true);
+		}
+		else
+		{
+			Cancel();
+		}
+	}
+
+	void GestureTap::TouchUp(const Touch& touch)
+	{
+		m_touchMap[touch.GetId()] = false;
+		if (IsActive())
+		{
+			m_tapInfo.duration = std::chrono::duration_cast<std::chrono::seconds>(std::chrono::steady_clock::now() - m_startTime);
+			m_tapInfo.position = touch.GetPosition();
+			if (m_tapInfo.duration <= MAX_DURATION)
+			{
+				OnTap.NotifyAll(this, m_tapInfo);
+			}
+			Cancel();
+		}
+		if (!GetTouchCount()) Reset(); // empty map if no touch
+	}
+}

openVulkanoCpp/Input/Touch/GestureTap.hpp

@@ -0,0 +1,42 @@
+/*
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+#pragma once
+
+#include "Gesture.hpp"
+#include "Touch.hpp"
+#include "GestureInfos.hpp"
+#include "Base/Event.hpp"
+#include <map>
+
+namespace OpenVulkano::Input
+{
+	class GestureTap final : public Gesture
+	{
+		std::chrono::time_point<std::chrono::steady_clock> m_startTime;
+		float m_distance;
+		Math::Vector2f m_initialPoint;
+		std::map<TouchId, bool> m_touchMap;
+		TapInfo m_tapInfo;
+
+		int GetTouchCount() const;
+
+	public:
+		GestureTap() : Gesture(TYPE_TAP) {}
+
+		~GestureTap() override = default;
+
+		void Cancel() override;
+
+		void Reset() override;
+
+		void TouchDown(const Touch& touch) override;
+		void TouchUp(const Touch& touch) override;
+		void TouchMoved(const Touch& touch) override;
+
+		Event<const GestureTap*, const TapInfo&> OnTap;
+	};
+}

openVulkanoCpp/Input/Touch/InputDeviceTouch.cpp

@@ -0,0 +1,212 @@
+/*
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+#include "InputDeviceTouch.hpp"
+#include "Base/Logger.hpp"
+#include <algorithm>
+
+namespace OpenVulkano::Input
+{
+	void InputDeviceTouch::Init()
+	{
+		InputDevice::Init(InputDeviceType::TOUCH, 0, "Touch");
+
+		m_gestureProcessor.Init();
+		m_gestureProcessor.m_gestureTap.OnTap += EventHandler(this, &InputDeviceTouch::UpdateTap);
+		m_gestureProcessor.m_gesturePan.OnPanStarted += EventHandler(this, &InputDeviceTouch::UpdatePanStarted);
+		m_gestureProcessor.m_gesturePan.OnPanMoved += EventHandler(this, &InputDeviceTouch::UpdatePanMoved);
+		m_gestureProcessor.m_gesturePanTwoFingers.OnPanStarted += EventHandler(this, &InputDeviceTouch::UpdatePanTwoFingersStarted);
+		m_gestureProcessor.m_gesturePanTwoFingers.OnPanMoved += EventHandler(this, &InputDeviceTouch::UpdatePanTwoFingersMoved);
+		m_gestureProcessor.m_gesturePinch.OnPinchStarted += EventHandler(this, &InputDeviceTouch::UpdatePinchStarted);
+		m_gestureProcessor.m_gesturePinch.OnPinchMoved += EventHandler(this, &InputDeviceTouch::UpdatePinchMoved);
+	}
+
+	decltype(InputDeviceTouch::m_touches)::iterator InputDeviceTouch::FindTouch(TouchId id)
+	{
+		return std::find_if(m_touches.begin(), m_touches.end(), [id](const Touch& touch)
+		{
+			return (id == touch.GetId());
+		});
+	}
+
+	TouchId InputDeviceTouch::AddTouch(const Math::Vector2f& position)
+	{
+		m_touches.emplace_back(m_nextId, position);
+		OnTouchAdded(m_touches.back());
+		return m_nextId++;
+	}
+
+	void InputDeviceTouch::TouchDown(TouchId id)
+	{
+		auto touchIter = FindTouch(id);
+
+		if (touchIter != m_touches.end())
+		{
+			touchIter->m_down = true;
+			if (!m_multiTouch && m_touches.size() > 1)
+			{
+				int count = 0;
+				for (const auto &touch : m_touches)
+				{
+					if(touch.IsDown()) count++;
+					if (count > 1)
+					{
+						Logger::INPUT->debug("Begin multitouch");
+						m_multiTouch = true;
+						break;
+					}
+				}
+			}
+
+			OnTouchDown.NotifyAll(*touchIter);
+			m_gestureProcessor.TouchDown(*touchIter);
+		}
+		else
+		{
+			Logger::INPUT->warn("Received touch down event for unknown touch id.");
+		}
+	}
+
+	void InputDeviceTouch::TouchUp(TouchId id)
+	{
+		auto touchIter = FindTouch(id);
+
+		if (touchIter != m_touches.end())
+		{
+			touchIter->m_down = false;
+
+			if (m_multiTouch)
+			{
+				bool hasDown = false;
+				for (const auto &touch : m_touches)
+				{
+					if (touch.IsDown())
+					{
+						hasDown = true;
+						break;
+					}
+				}
+				if (!hasDown)
+				{
+					Logger::INPUT->debug("End multitouch");
+					m_multiTouch = false;
+				}
+			}
+
+			OnTouchUp.NotifyAll(*touchIter);
+			m_gestureProcessor.TouchUp(*touchIter);
+		}
+		else
+		{
+			Logger::INPUT->warn("Received touch up for unknown touch id.");
+		}
+	}
+
+	void InputDeviceTouch::TouchMoved(TouchId id, const Math::Vector2f& position)
+	{
+		auto touchIter = FindTouch(id);
+
+		if (touchIter != m_touches.end())
+		{
+			touchIter->m_lastPosition = touchIter->m_position;
+			touchIter->m_position = position;
+
+			OnTouchMoved.NotifyAll(*touchIter);
+			m_gestureProcessor.TouchMoved(*touchIter);
+		}
+		else
+		{
+			Logger::INPUT->warn("Received touch moved for unknown touch id");
+		}
+	}
+
+	void InputDeviceTouch::RemoveTouch(TouchId id)
+	{
+		auto touchIter = FindTouch(id);
+		if (touchIter != m_touches.end())
+		{
+			auto removedTouch = *touchIter;
+			m_touches.erase(touchIter);
+
+			if (m_touches.empty())
+			{
+				m_multiTouch = false;
+			}
+
+			OnTouchRemoved.NotifyAll(removedTouch);
+		}
+		else
+		{
+			Logger::INPUT->warn("Received remove request for unknown touch id");
+		}
+	}
+
+	void InputDeviceTouch::UpdatePinchStarted(const Gesture* pinch, const PinchInfo& info)
+	{
+		m_lastPinchInfo = m_nextPinchInfo = info;
+	}
+
+	void InputDeviceTouch::UpdatePanStarted(const Gesture* pan, const PanInfo& info)
+	{
+		m_lastPanInfo = m_nextPanInfo = info;
+	}
+
+	void InputDeviceTouch::UpdatePanTwoFingersStarted(const Gesture* pan, const PanInfo& info)
+	{
+		m_last2FPanInfo = m_next2FPanInfo = info;
+	}
+
+	void InputDeviceTouch::UpdatePinchMoved(const Gesture* pinch, const PinchInfo& info)
+	{
+		m_nextPinchInfo = info;
+	}
+
+	void InputDeviceTouch::UpdatePanMoved(const Gesture* pan, const PanInfo& info)
+	{
+		m_nextPanInfo = info;
+	}
+
+	void InputDeviceTouch::UpdatePanTwoFingersMoved(const Gesture* pan, const PanInfo& info)
+	{
+		m_next2FPanInfo = info;
+	}
+
+	void InputDeviceTouch::UpdateTap(const Gesture* tap, const TapInfo& info)
+	{
+		m_toBePressedButtons = 1;
+		m_nextTap = info.position;
+		m_axes[InputKey::Touch::Axis::AXIS_TAP_DURATION] = info.duration.count();
+	}
+
+	void InputDeviceTouch::Tick()
+	{
+		m_lastPressedButtons = m_pressedButtons;
+		m_pressedButtons = m_toBePressedButtons;
+		m_toBePressedButtons = 0;
+
+		// Tap
+		auto diff = m_nextTap - m_lastTap;
+		m_axes[InputKey::Touch::Axis::AXIS_TAP_X] = diff.x;
+		m_axes[InputKey::Touch::Axis::AXIS_TAP_Y] = diff.y;
+		m_lastTap = m_nextTap;
+
+		// Pan
+		diff = m_nextPanInfo.position - m_lastPanInfo.position;
+		m_axes[InputKey::Touch::Axis::AXIS_PAN_X] = diff.x;
+		m_axes[InputKey::Touch::Axis::AXIS_PAN_Y] = diff.y;
+		m_lastPanInfo = m_nextPanInfo;
+		diff = m_next2FPanInfo.position - m_last2FPanInfo.position;
+		m_axes[InputKey::Touch::Axis::AXIS_PAN_TWO_FINGERS_X] = diff.x;
+		m_axes[InputKey::Touch::Axis::AXIS_PAN_TWO_FINGERS_Y] = diff.y;
+		m_next2FPanInfo = m_last2FPanInfo;
+
+		// Pinch
+		m_axes[InputKey::Touch::Axis::AXIS_PINCH] = m_nextPinchInfo.scale;
+		diff = m_nextPinchInfo.position - m_lastPinchInfo.position;
+		m_axes[InputKey::Touch::Axis::AXIS_PINCH_CENTER_X] = diff.x;
+		m_axes[InputKey::Touch::Axis::AXIS_PINCH_CENTER_Y] = diff.y;
+	}
+}

openVulkanoCpp/Input/Touch/InputDeviceTouch.hpp

@@ -0,0 +1,88 @@
+/*
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+#pragma once
+
+#include "Touch.hpp"
+#include "GestureProcessor.hpp"
+#include "Input/InputDevice.hpp"
+#include "Base/Event.hpp"
+#include "GestureInfos.hpp"
+#include <mutex>
+#include <vector>
+
+namespace OpenVulkano::Input
+{
+	class InputDeviceTouch final : public InputDevice
+	{
+		GestureProcessor m_gestureProcessor;
+		std::vector<Touch> m_touches;
+		TouchId m_nextId = 0;
+		bool m_multiTouch = false;
+		uint8_t m_pressedButtons = 0, m_lastPressedButtons = 0, m_toBePressedButtons = 0;
+		float m_axes[InputKey::Touch::Axis::AXIS_LAST + 1] = { 0 };
+		Math::Vector2f m_lastTap{}, m_nextTap{};
+		PinchInfo m_lastPinchInfo, m_nextPinchInfo;
+		PanInfo m_lastPanInfo, m_nextPanInfo, m_last2FPanInfo, m_next2FPanInfo;
+
+		decltype(m_touches)::iterator FindTouch(TouchId id);
+
+		[[nodiscard]] bool GetLastButton(InputKey::Touch::Button button) const
+		{
+			return m_lastPressedButtons & (1 << button);
+		}
+
+	public:
+		InputDeviceTouch() = default;
+
+		void Init();
+
+		void Tick() final;
+
+		TouchId AddTouch(const Math::Vector2f& position);
+		void TouchDown(TouchId id);
+		void TouchUp(TouchId id);
+		void TouchMoved(TouchId id, const Math::Vector2f& position);
+		void RemoveTouch(TouchId id);
+
+		void UpdatePinchStarted(const Gesture* pinch, const PinchInfo &info);
+		void UpdatePinchMoved(const Gesture* pinch, const PinchInfo &info);
+		void UpdatePanStarted(const Gesture* pan, const PanInfo &info);
+		void UpdatePanMoved(const Gesture* pan, const PanInfo &info);
+		void UpdatePanTwoFingersStarted(const Gesture* pan, const PanInfo &info);
+		void UpdatePanTwoFingersMoved(const Gesture* pan, const PanInfo &info);
+		void UpdateTap(const Gesture* tap, const TapInfo &info);
+
+		[[nodiscard]] float ReadAxis(int16_t key) const override {return GetAxis( static_cast<InputKey::Touch::Axis>(key)); }
+		[[nodiscard]] bool ReadButton(int16_t key) const override { return GetButton(static_cast<InputKey::Touch::Button>(key)); }
+		[[nodiscard]] bool ReadButtonUp(int16_t key) const override { return GetButtonUp(static_cast<InputKey::Touch::Button>(key)); }
+		[[nodiscard]] bool ReadButtonDown(int16_t key) const override { return GetButtonDown(static_cast<InputKey::Touch::Button>(key)); }
+
+		[[nodiscard]] const Math::Vector2f& GetTapPosition() const { return m_nextTap; }
+
+		[[nodiscard]] float GetAxis(const InputKey::Touch::Axis axis) const { return m_axes[axis]; }
+
+		[[nodiscard]] bool GetButton(const InputKey::Touch::Button button) const
+		{
+			return m_pressedButtons & (1 << button);
+		}
+
+		[[nodiscard]] bool GetButtonUp(const InputKey::Touch::Button button) const
+		{
+			return !GetButton(button) && GetLastButton(button);
+		}
+
+		[[nodiscard]] bool GetButtonDown(const InputKey::Touch::Button button) const
+		{
+			return GetButton(button) && !GetLastButton(button);
+		}
+
+		[[nodiscard]] bool HasTouch() const { return !m_touches.empty(); }
+		[[nodiscard]] bool IsMultiTouch() const { return m_multiTouch; }
+
+		Event<Touch&> OnTouchAdded, OnTouchDown, OnTouchUp, OnTouchMoved, OnTouchRemoved;
+	};
+}

openVulkanoCpp/Input/Touch/Touch.hpp

@@ -0,0 +1,36 @@
+/*
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+#pragma once
+
+#include "Math/Math.hpp"
+
+namespace OpenVulkano::Input
+{
+	typedef uint32_t TouchId;
+
+	class Touch final
+	{
+		friend class InputDeviceTouch;
+
+		TouchId m_id;
+		Math::Vector2f m_position, m_lastPosition;
+		bool m_down = false;
+
+	public:
+		Touch(TouchId id, const Math::Vector2f& position)
+				: m_id(id), m_position(position), m_lastPosition(position)
+		{}
+
+		[[nodiscard]] TouchId GetId() const { return m_id; }
+
+		[[nodiscard]] Math::Vector2f GetPosition() const { return m_position; }
+
+		[[nodiscard]] Math::Vector2f GetLastPosition() const { return m_position; }
+
+		[[nodiscard]] bool IsDown() const { return m_down; }
+	};
+}

openVulkanoCpp/Input/Touch/TouchInfo.hpp

@@ -0,0 +1,22 @@
+/*
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+#pragma once
+
+#include "Touch.hpp"
+
+namespace OpenVulkano::Input
+{
+	struct TouchInfo final
+	{
+		TouchId touchId;
+		Math::Vector2f initialPosition;
+		Math::Vector2f currentPosition;
+		Math::Vector2f delta;
+		bool isDrag = false;
+		bool active = false;
+	};
+}