ConstantScalarField2.h

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/*************************************************************************
> File Name: ConstantScalarField2.h
> Project Name: CubbyFlow
> Author: Chan-Ho Chris Ohk
> Purpose: 2-D constant scalar field.
> Created Time: 2017/04/01
> Copyright (c) 2018, Chan-Ho Chris Ohk
*************************************************************************/
#ifndef CUBBYFLOW_CONSTANT_SCALAR_FIELD2_H
#define CUBBYFLOW_CONSTANT_SCALAR_FIELD2_H

#include <Core/Field/ScalarField2.h>

namespace CubbyFlow
{
    class ConstantScalarField2 final : public ScalarField2
    {
    public:
        class Builder;

        explicit ConstantScalarField2(double value);

        double Sample(const Vector2D& x) const override;

        std::function<double(const Vector2D&)> Sampler() const override;

        static Builder GetBuilder();

    private:
        double m_value = 0.0;
    };

    using ConstantScalarField2Ptr = std::shared_ptr<ConstantScalarField2>;

    class ConstantScalarField2::Builder final
    {
    public:
        Builder& WithValue(double value);

        ConstantScalarField2 Build() const;

        ConstantScalarField2Ptr MakeShared() const;

    private:
        double m_value = 0.0;
    };
}

#endif