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/* Copyright (C) 2017 Wildfire Games.
* This file is part of 0 A.D.
*
* 0 A.D. is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* 0 A.D. is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with 0 A.D. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef INCLUDED_CINEMAPATH
#define INCLUDED_CINEMAPATH
#include "maths/NUSpline.h"
#include "ps/CStr.h"
class CVector3D;
class CCamera;
class CCinemaData
{
public:
CCinemaData() : m_LookAtTarget(false), m_GrowthCount(0), m_Growth(1), m_Switch(1), m_Timescale(fixed::FromInt(1)) {}
virtual ~CCinemaData() {}
const CCinemaData* GetData() const { return this; }
CStrW m_Name;
CStrW m_Orientation;
CStrW m_Mode;
CStrW m_Style;
bool m_LookAtTarget;
fixed m_Timescale; // a negative timescale results in backwards play
// Distortion variables
mutable float m_GrowthCount;
float m_Growth;
float m_Switch;
};
// Once the data is part of the path, it shouldn't be changeable, so use private inheritance.
// This class encompasses the spline and the information which determines how the path will operate
// and also provides the functionality for doing so
class CCinemaPath : private CCinemaData, public TNSpline
{
public:
CCinemaPath() : m_TimeElapsed(0), m_PreviousNodeTime(0) {}
CCinemaPath(const CCinemaData& data, const TNSpline& spline, const TNSpline& targetSpline);
// Sets camera position to calculated point on spline
void MoveToPointAt(float t, float nodet, const CVector3D& startRotation, CCamera* camera) const;
// Distortion mode functions-change how ratio is passed to distortion style functions
float EaseIn(float t) const;
float EaseOut(float t) const;
float EaseInOut(float t) const;
float EaseOutIn(float t) const;
// Distortion style functions
float EaseDefault(float t) const;
float EaseGrowth(float t) const;
float EaseExpo(float t) const;
float EaseCircle(float t) const;
float EaseSine(float t) const;
float (CCinemaPath::*DistStylePtr)(float ratio) const;
float (CCinemaPath::*DistModePtr)(float ratio) const;
const CCinemaData* GetData() const;
public:
CVector3D GetNodePosition(const int index) const;
fixed GetNodeDuration(const int index) const;
fixed GetDuration() const;
float GetNodeFraction() const;
float GetElapsedTime() const;
const CStrW& GetName() const;
void SetTimescale(fixed scale);
float m_TimeElapsed;
float m_PreviousNodeTime; // How much time has passed before the current node
size_t m_CurrentNode;
CVector3D m_PreviousRotation;
public:
/**
* Returns false if finished.
* @param deltaRealTime Elapsed real time since the last frame.
* @param camera An affected camera
*/
bool Play(const float deltaRealTime, CCamera* camera);
/**
* Validate the path
* @return true if the path is valid
*/
bool Validate();
/**
* Returns true if path doesn't contain nodes
*/
bool Empty() const;
/**
* Resets the path state
*/
void Reset();
fixed GetTimescale() const;
const TNSpline& GetTargetSpline() const;
private:
TNSpline m_TargetSpline;
};
#endif // INCLUDED_CINEMAPATH
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