MapCameraAnimator.h

#pragma once

#include "MapCamera.h"
#include "Positioning.h"
#include "MapCameraPosition.h"
#include "MapCameraAnimationFrame.h"
#include "GlobeCamera.h"

namespace Eegeo
{
    namespace Camera
    {
        namespace MapCamera
        {

            class MapCameraAnimator
            {
            public:
                static MapCameraAnimator* Create(
                    Positioning::IPointOnMapFactory& pointOnMapFactory,
                    const Positioning::IPositioningViewComponent& positioningViewComponent,
                    const Camera::GlobeCamera::IGlobeCameraDistanceBasedPitchControl& distanceBasedPitchControl
                );

                ~MapCameraAnimator();

                void Begin(
                    const MapCameraPosition& start,
                    const MapCameraPosition& target
                    );

                MapCameraAnimationFrame CalculateFrame(double interpolationParam);

            private:
                MapCameraAnimator(
                    Positioning::IPointOnMap* pStartInterestPointOnMap,
                    Positioning::IPointOnMap* pEndInterestPointOnMap,
                    const Positioning::IPositioningViewComponent& positioningViewComponent,
                    const Camera::GlobeCamera::IGlobeCameraDistanceBasedPitchControl& distanceBasedPitchControl
                );

                double CalculateTransformedAltitude(const Positioning::IPointOnMap& pointOnMap) const;
                double CalculateClampedZenithAngle(double desiredZenithAngleDegrees, double distanceToInterest) const;

                Positioning::IPointOnMap* const m_pStartInterestPointOnMap;
                Positioning::IPointOnMap* const m_pEndInterestPointOnMap;
                const Positioning::IPositioningViewComponent& m_positioningViewComponent;
                const Camera::GlobeCamera::IGlobeCameraDistanceBasedPitchControl& m_distanceBasedPitchControl;

                MapCameraAnimationFrame m_startFrame;
                MapCameraPosition m_endMapCameraPosition;
            };
        }
    }
}