// ----------------------------------------------------------------

// From Game Programming in C++ by Sanjay Madhav

// Copyright (C) 2017 Sanjay Madhav. All rights reserved.

//

// Released under the BSD License

// See LICENSE in root directory for full details.

// ----------------------------------------------------------------

#pragma once

#include "CameraComponent.h"

#include <vector>

struct Spline

{

// Control points for spline

// (Requires n+2 points where n is number

// of points in segment)

std::vector<Vector3> mControlPoints;

// Given spline segment where startIdx = P1,

// compute position based on t value

Vector3 Compute(size_t startIdx, float t) const;

// Returns number of control points

size_t GetNumPoints() const { return mControlPoints.size(); }

};

class SplineCamera : public CameraComponent

{

public:

SplineCamera(class Actor* owner);

void Update(float deltaTime) override;

// Restart the spline

void Restart();

void SetSpeed(float speed) { mSpeed = speed; }

void SetSpline(const Spline& spline) { mPath = spline; }

void SetPaused(bool pause) { mPaused = pause; }

private:

// Spline path camera follows

Spline mPath;

// Current control point index and t

size_t mIndex;

float mT;

// Amount t changes/sec

float mSpeed;

// Whether to move the camera long the path

bool mPaused;

};