AnimatedCurve.h

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// Copyright (c) 2008-2026 OpenShot Studios, LLC
//
// SPDX-License-Identifier: LGPL-3.0-or-later
 
#ifndef OPENSHOT_ANIMATED_CURVE_H
#define OPENSHOT_ANIMATED_CURVE_H
 
#include "Json.h"
#include "KeyFrame.h"
#include "Point.h"
 
#include <cstdint>
#include <string>
#include <vector>
 
namespace openshot {
 
class AnimatedCurveNode {
public:
    int id;
    Keyframe x;
    Keyframe y;
    Keyframe left_handle_x;
    Keyframe left_handle_y;
    Keyframe right_handle_x;
    Keyframe right_handle_y;
    InterpolationType interpolation;
    HandleType handle_type;
 
    AnimatedCurveNode();
    AnimatedCurveNode(int node_id, double node_x, double node_y, InterpolationType node_interpolation=LINEAR);
 
    Point Evaluate(int64_t frame_number, double x_scale=1.0) const;
 
    std::string Json() const;
    Json::Value JsonValue() const;
    void SetJson(const std::string value);
    void SetJsonValue(const Json::Value& root);
};
 
class AnimatedCurve {
private:
    std::vector<AnimatedCurveNode> nodes;
 
public:
    Keyframe enabled;
 
    AnimatedCurve();
 
    const std::vector<AnimatedCurveNode>& Nodes() const { return nodes; }
    std::vector<AnimatedCurveNode>& Nodes() { return nodes; }
 
    Keyframe BuildCurve(int64_t frame_number, double x_scale=1.0) const;
    float Sample(float input, int64_t frame_number) const;
    std::string Summary(int64_t frame_number) const;
 
    std::string Json() const;
    Json::Value JsonValue() const;
    void SetJson(const std::string value);
    void SetJsonValue(const Json::Value& root);
};
 
}
 
#endif