ImplicitTriangleMesh3.h

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/*************************************************************************
> File Name: ImplicitTriangleMesh3.h
> Project Name: CubbyFlow
> Author: Chan-Ho Chris Ohk
> Purpose: TriangleMesh3 to ImplicitSurface3 converter.
> Created Time: 2017/09/23
> Copyright (c) 2018, Chan-Ho Chris Ohk
*************************************************************************/
#ifndef CUBBYFLOW_IMPLICIT_TRIANGLE_MESH3_H
#define CUBBYFLOW_IMPLICIT_TRIANGLE_MESH3_H

#include <Core/Geometry/TriangleMesh3.h>
#include <Core/Grid/VertexCenteredScalarGrid3.h>
#include <Core/Surface/CustomImplicitSurface3.h>
#include <Core/Surface/ImplicitSurface3.h>

namespace CubbyFlow
{
    class ImplicitTriangleMesh3 final : public ImplicitSurface3
    {
    public:
        class Builder;

        ImplicitTriangleMesh3(
            const TriangleMesh3Ptr& mesh,
            size_t resolutionX,
            double margin,
            const Transform3& transform = Transform3(),
            bool isNormalFlipped = false);

        virtual ~ImplicitTriangleMesh3();

        static Builder GetBuilder();

        const VertexCenteredScalarGrid3Ptr& GetGrid() const;

    private:
        TriangleMesh3Ptr m_mesh;
        VertexCenteredScalarGrid3Ptr m_grid;
        CustomImplicitSurface3Ptr m_customImplicitSurface;

        Vector3D ClosestPointLocal(const Vector3D& otherPoint) const override;

        double ClosestDistanceLocal(const Vector3D& otherPoint) const override;

        bool IntersectsLocal(const Ray3D& ray) const override;

        BoundingBox3D BoundingBoxLocal() const override;

        Vector3D ClosestNormalLocal(const Vector3D& otherPoint) const override;

        double SignedDistanceLocal(const Vector3D& otherPoint) const override;

        SurfaceRayIntersection3 ClosestIntersectionLocal(const Ray3D& ray) const override;
    };

    using ImplicitTriangleMesh3Ptr = std::shared_ptr<ImplicitTriangleMesh3>;

    class ImplicitTriangleMesh3::Builder final : public SurfaceBuilderBase3<ImplicitTriangleMesh3::Builder>
    {
    public:
        Builder& WithTriangleMesh(const TriangleMesh3Ptr& mesh);

        Builder& WithResolutionX(size_t resolutionX);

        Builder& WithMargin(double margin);

        ImplicitTriangleMesh3 Build() const;

        ImplicitTriangleMesh3Ptr MakeShared() const;

    private:
        TriangleMesh3Ptr m_mesh;
        size_t m_resolutionX = 32;
        double m_margin = 0.2;
    };
}

#endif