IntersectionQueryEngine3.h

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/*************************************************************************
> File Name: IntersectionQueryEngine3.h
> Project Name: CubbyFlow
> Author: Chan-Ho Chris Ohk
> Purpose: Abstract base class for 3-D intersection test query engine.
> Created Time: 2017/10/14
> Copyright (c) 2018, Chan-Ho Chris Ohk
*************************************************************************/
#ifndef CUBBYFLOW_INTERSECTION_QUERY_ENGINE3_H
#define CUBBYFLOW_INTERSECTION_QUERY_ENGINE3_H

#include <Core/BoundingBox/BoundingBox3.h>
#include <Core/Vector/Vector3.h>

namespace CubbyFlow
{
    template <typename T>
    struct ClosestIntersectionQueryResult3
    {
        const T* item = nullptr;
        double distance = std::numeric_limits<double>::max();
    };

    template <typename T>
    using ClosestIntersectionDistanceFunc3 = std::function<double(const T&, const Vector3D&)>;

    template <typename T>
    using BoxIntersectionTestFunc3 = std::function<bool(const T&, const BoundingBox3D&)>;

    template <typename T>
    using RayIntersectionTestFunc3 = std::function<bool(const T&, const Ray3D&)>;

    template <typename T>
    using GetRayIntersectionFunc3 = std::function<double(const T&, const Ray3D&)>;

    template <typename T>
    using IntersectionVisitorFunc3 = std::function<void(const T&)>;

    template <typename T>
    class IntersectionQueryEngine3
    {
    public:
        virtual bool IsIntersects(
            const BoundingBox3D& box,
            const BoxIntersectionTestFunc3<T>& testFunc) const = 0;

        virtual bool IsIntersects(
            const Ray3D& ray,
            const RayIntersectionTestFunc3<T>& testFunc) const = 0;

        virtual void ForEachIntersectingItem(
            const BoundingBox3D& box, const BoxIntersectionTestFunc3<T>& testFunc,
            const IntersectionVisitorFunc3<T>& visitorFunc) const = 0;

        virtual void ForEachIntersectingItem(
            const Ray3D& ray, const RayIntersectionTestFunc3<T>& testFunc,
            const IntersectionVisitorFunc3<T>& visitorFunc) const = 0;

        virtual ClosestIntersectionQueryResult3<T> GetClosestIntersection(
            const Ray3D& ray, const GetRayIntersectionFunc3<T>& testFunc) const = 0;
    };
}

#endif