ConstantVectorField3.h

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/*************************************************************************
> File Name: ConstantVectorField3.h
> Project Name: CubbyFlow
> Author: Chan-Ho Chris Ohk
> Purpose: 3-D constant vector field.
> Created Time: 2017/04/01
> Copyright (c) 2018, Chan-Ho Chris Ohk
*************************************************************************/
#ifndef CUBBYFLOW_CONSTANT_VECTOR_FIELD3_H
#define CUBBYFLOW_CONSTANT_VECTOR_FIELD3_H

#include <Core/Field/VectorField3.h>

namespace CubbyFlow
{
    class ConstantVectorField3 final : public VectorField3
    {
    public:
        class Builder;

        explicit ConstantVectorField3(const Vector3D& value);

        Vector3D Sample(const Vector3D& x) const override;

        std::function<Vector3D(const Vector3D&)> Sampler() const override;

        static Builder GetBuilder();

    private:
        Vector3D m_value;
    };

    using ConstantVectorField3Ptr = std::shared_ptr<ConstantVectorField3>;


    class ConstantVectorField3::Builder final
    {
    public:
        Builder& WithValue(const Vector3D& value);

        ConstantVectorField3 Build() const;

        ConstantVectorField3Ptr MakeShared() const;

    private:
        Vector3D m_value{ 0, 0, 0 };
    };
}

#endif