Curve.h

Go to the documentation of this file.

/*
* Copyright Disney Enterprises, Inc.  All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License
* and the following modification to it: Section 6 Trademarks.
* deleted and replaced with:
*
* 6. Trademarks. This License does not grant permission to use the
* trade names, trademarks, service marks, or product names of the
* Licensor and its affiliates, except as required for reproducing
* the content of the NOTICE file.
*
* You may obtain a copy of the License at
* http://www.apache.org/licenses/LICENSE-2.0
*/
#pragma once

#include "Vec.h"
#include <vector>

#include <cfloat>
#include <cassert>

namespace SeExpr2 {


template <class T>
class Curve {
    mutable int cacheCV;

  public:
    enum InterpType {
        kNone = 0,
        kLinear,
        kSmooth,
        kSpline,
        kMonotoneSpline
    };
    struct CV {
        CV(double pos, const T& val, InterpType type) : _pos(pos), _val(val), _interp(type) {}

        double _pos;
        T _val, _deriv;
        InterpType _interp;
    };

  private:
    std::vector<CV> _cvData;
    bool prepared;

  public:
    Curve();

    void addPoint(double position, const T& val, InterpType type);

    void preparePoints();

    T getValue(const double param) const;

    double getChannelValue(const double param, int channel) const;

    CV getLowerBoundCV(const double param) const;

    static bool interpTypeValid(InterpType interp);

    static bool cvLessThan(const CV& cv1, const CV& cv2);

  private:
    void clampCurveSegment(const T& delta, T& d1, T& d2);

    static double comp(const T& val, const int i);
};
}