ES-DE/es-app/src/animations/MoveCameraAnimation.h

//  SPDX-License-Identifier: MIT
//
//  EmulationStation Desktop Edition
//  MoveCameraAnimation.h
//
//  Animation to play when moving the camera, used by the slide transition style.
//

#ifndef ES_APP_ANIMATIONS_MOVE_CAMERA_ANIMATION_H
#define ES_APP_ANIMATIONS_MOVE_CAMERA_ANIMATION_H

#include "animations/Animation.h"

class MoveCameraAnimation : public Animation
{
public:
    MoveCameraAnimation(
            Transform4x4f& camera,
            const Vector3f& target)
            : mCameraStart(camera),
            mTarget(target),
            cameraOut(camera) {}

    int getDuration() const override { return 400; }

    void apply(float t) override
    {
        // Cubic ease out.
        t -= 1;
        cameraOut.translation() = -Vector3f().lerp(-mCameraStart.translation(), mTarget, t*t*t + 1);
    }

private:
    Transform4x4f mCameraStart;
    Vector3f mTarget;

    Transform4x4f& cameraOut;
};

#endif // ES_APP_ANIMATIONS_MOVE_CAMERA_ANIMATION_H