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60 lines
2.2 KiB
60 lines
2.2 KiB
// David Eberly, Geometric Tools, Redmond WA 98052
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// Copyright (c) 1998-2021
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// Distributed under the Boost Software License, Version 1.0.
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// https://www.boost.org/LICENSE_1_0.txt
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// https://www.geometrictools.com/License/Boost/LICENSE_1_0.txt
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// Version: 4.0.2019.08.13
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#pragma once
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#include <Mathematics/DistLine3Rectangle3.h>
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#include <Mathematics/DistPoint3Rectangle3.h>
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#include <Mathematics/Ray.h>
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namespace gte
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{
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template <typename Real>
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class DCPQuery<Real, Ray3<Real>, Rectangle3<Real>>
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{
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public:
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struct Result
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{
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Real distance, sqrDistance;
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Real rayParameter, rectangleParameter[2];
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Vector3<Real> closestPoint[2];
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};
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Result operator()(Ray3<Real> const& ray, Rectangle3<Real> const& rectangle)
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{
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Result result;
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Line3<Real> line(ray.origin, ray.direction);
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DCPQuery<Real, Line3<Real>, Rectangle3<Real>> lrQuery;
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auto lrResult = lrQuery(line, rectangle);
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if (lrResult.lineParameter >= (Real)0)
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{
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result.distance = lrResult.distance;
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result.sqrDistance = lrResult.sqrDistance;
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result.rayParameter = lrResult.lineParameter;
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result.rectangleParameter[0] = lrResult.rectangleParameter[0];
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result.rectangleParameter[1] = lrResult.rectangleParameter[1];
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result.closestPoint[0] = lrResult.closestPoint[0];
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result.closestPoint[1] = lrResult.closestPoint[1];
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}
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else
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{
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DCPQuery<Real, Vector3<Real>, Rectangle3<Real>> prQuery;
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auto prResult = prQuery(ray.origin, rectangle);
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result.distance = prResult.distance;
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result.sqrDistance = prResult.sqrDistance;
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result.rayParameter = (Real)0;
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result.rectangleParameter[0] = prResult.rectangleParameter[0];
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result.rectangleParameter[1] = prResult.rectangleParameter[1];
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result.closestPoint[0] = ray.origin;
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result.closestPoint[1] = prResult.rectangleClosestPoint;
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}
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return result;
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}
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};
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}
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