IntersectionQueryEngine2.h

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/*************************************************************************
> File Name: IntersectionQueryEngine2.h
> Project Name: CubbyFlow
> Author: Chan-Ho Chris Ohk
> Purpose: Abstract base class for 2-D intersection test query engine.
> Created Time: 2017/10/14
> Copyright (c) 2018, Chan-Ho Chris Ohk
*************************************************************************/
#ifndef CUBBYFLOW_INTERSECTION_QUERY_ENGINE2_H
#define CUBBYFLOW_INTERSECTION_QUERY_ENGINE2_H

#include <Core/BoundingBox/BoundingBox2.h>
#include <Core/Vector/Vector2.h>

namespace CubbyFlow
{
    template <typename T>
    struct ClosestIntersectionQueryResult2
    {
        const T* item = nullptr;
        double distance = std::numeric_limits<double>::max();
    };

    template <typename T>
    using ClosestIntersectionDistanceFunc2 = std::function<double(const T&, const Vector2D&)>;

    template <typename T>
    using BoxIntersectionTestFunc2 = std::function<bool(const T&, const BoundingBox2D&)>;

    template <typename T>
    using RayIntersectionTestFunc2 = std::function<bool(const T&, const Ray2D&)>;

    template <typename T>
    using GetRayIntersectionFunc2 = std::function<double(const T&, const Ray2D&)>;

    template <typename T>
    using IntersectionVisitorFunc2 = std::function<void(const T&)>;

    template <typename T>
    class IntersectionQueryEngine2
    {
    public:
        virtual bool IsIntersects(
            const BoundingBox2D& box,
            const BoxIntersectionTestFunc2<T>& testFunc) const = 0;

        virtual bool IsIntersects(
            const Ray2D& ray,
            const RayIntersectionTestFunc2<T>& testFunc) const = 0;

        virtual void ForEachIntersectingItem(
            const BoundingBox2D& box, const BoxIntersectionTestFunc2<T>& testFunc,
            const IntersectionVisitorFunc2<T>& visitorFunc) const = 0;

        virtual void ForEachIntersectingItem(
            const Ray2D& ray, const RayIntersectionTestFunc2<T>& testFunc,
            const IntersectionVisitorFunc2<T>& visitorFunc) const = 0;

        virtual ClosestIntersectionQueryResult2<T> GetClosestIntersection(
            const Ray2D& ray, const GetRayIntersectionFunc2<T>& testFunc) const = 0;
    };
}

#endif