TouchRotateGesture.h

// Copyright eeGeo Ltd (2012-2014), All Rights Reserved

#pragma once

#include "VectorMath.h"
#include "IEmscriptenInputHandler.h"
#include "InputEvents.h"

namespace Eegeo
{
    namespace Emscripten
    {
        namespace Input
        {
            class TouchRotateGesture
            {
            private:
                IEmscriptenInputHandler* m_pHandler;
                bool m_rotating;
                Eegeo::v2 m_lastPointer[2];
                float m_lastRotationRadians;
                float m_totalRotation;
                float m_previousRotationDelta;

                bool m_needNewBaseline;

                Eegeo::v2 m_baselineDirection;

                float m_majorScreenDimension;

                bool UpdateRotation(const TouchInputEvent& event, int numTouches, bool pointerUp);

            public:
                TouchRotateGesture(IEmscriptenInputHandler* pHandler, float screenWidth, float screenHeight);

                void PointerDown(const TouchInputEvent& event);
                void PointerUp(const TouchInputEvent& event);
                void PointerMove(const TouchInputEvent& event);

                void NotifyScreenPropertiesChanged(int screenWidth, int screenHeight);
            };
        }
    }
}