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62 lines
2.3 KiB
62 lines
2.3 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/DistLine3Triangle3.h>
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#include <Mathematics/DistPointTriangle.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>, Triangle3<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, triangleParameter[3];
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Vector3<Real> closestPoint[2];
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};
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Result operator()(Ray3<Real> const& ray, Triangle3<Real> const& triangle)
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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>, Triangle3<Real>> ltQuery;
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auto ltResult = ltQuery(line, triangle);
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if (ltResult.lineParameter >= (Real)0)
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{
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result.distance = ltResult.distance;
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result.sqrDistance = ltResult.sqrDistance;
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result.rayParameter = ltResult.lineParameter;
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result.triangleParameter[0] = ltResult.triangleParameter[0];
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result.triangleParameter[1] = ltResult.triangleParameter[1];
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result.triangleParameter[2] = ltResult.triangleParameter[2];
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result.closestPoint[0] = ltResult.closestPoint[0];
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result.closestPoint[1] = ltResult.closestPoint[1];
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}
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else
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{
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DCPQuery<Real, Vector3<Real>, Triangle3<Real>> ptQuery;
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auto ptResult = ptQuery(ray.origin, triangle);
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result.distance = ptResult.distance;
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result.sqrDistance = ptResult.sqrDistance;
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result.rayParameter = (Real)0;
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result.triangleParameter[0] = ptResult.parameter[0];
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result.triangleParameter[1] = ptResult.parameter[1];
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result.triangleParameter[2] = ptResult.parameter[2];
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result.closestPoint[0] = ray.origin;
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result.closestPoint[1] = ptResult.closest;
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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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