Gradient.h

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// ----------------------------------------------------------------------------
// -                        CloudViewer: www.cloudViewer.org                  -
// ----------------------------------------------------------------------------
// Copyright (c) 2018-2024 www.cloudViewer.org
// SPDX-License-Identifier: MIT
// ----------------------------------------------------------------------------
 
#pragma once
 
#include <Eigen/Core>
#include <map>
#include <vector>
 
#include "visualization/rendering/RendererHandle.h"
 
namespace cloudViewer {
namespace visualization {
namespace rendering {
 
class Renderer;
 
class Gradient {
public:
    struct Point {
        float value;
        Eigen::Vector4f color;
    };
 
    Gradient();
    Gradient(const std::vector<Gradient::Point>& points);
    virtual ~Gradient();
 
    const std::vector<Gradient::Point>& GetPoints() const;
    void SetPoints(const std::vector<Gradient::Point>& points);
 
    enum class Mode {
        kGradient,  
        kLUT        
    };
 
    Mode GetMode() const;
    void SetMode(Mode mode);
 
    TextureHandle GetTextureHandle(Renderer& renderer);
 
private:
    std::vector<Gradient::Point> points_;
    Mode mode_ = Mode::kGradient;
    std::map<Renderer*, TextureHandle> textures_;
};
 
}  // namespace rendering
}  // namespace visualization
}  // namespace cloudViewer