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99 lines
3.2 KiB
99 lines
3.2 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/IntrLine3AlignedBox3.h>
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#include <Mathematics/OrientedBox.h>
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// The test-intersection queries use the method of separating axes.
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// https://www.geometrictools.com/Documentation/MethodOfSeparatingAxes.pdf
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// The find-intersection queries use parametric clipping against the six
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// faces of the box. The find-intersection queries use Liang-Barsky
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// clipping. The queries consider the box to be a solid. The algorithms
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// are described in
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// https://www.geometrictools.com/Documentation/IntersectionLineBox.pdf
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namespace gte
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{
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template <typename Real>
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class TIQuery<Real, Line3<Real>, OrientedBox3<Real>>
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:
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public TIQuery<Real, Line3<Real>, AlignedBox3<Real>>
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{
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public:
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struct Result
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:
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public TIQuery<Real, Line3<Real>, AlignedBox3<Real>>::Result
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{
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// No additional relevant information to compute.
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};
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Result operator()(Line3<Real> const& line, OrientedBox3<Real> const& box)
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{
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// Transform the line to the oriented-box coordinate system.
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Vector3<Real> diff = line.origin - box.center;
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Vector3<Real> lineOrigin
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{
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Dot(diff, box.axis[0]),
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Dot(diff, box.axis[1]),
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Dot(diff, box.axis[2])
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};
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Vector3<Real> lineDirection
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{
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Dot(line.direction, box.axis[0]),
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Dot(line.direction, box.axis[1]),
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Dot(line.direction, box.axis[2])
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};
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Result result;
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this->DoQuery(lineOrigin, lineDirection, box.extent, result);
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return result;
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}
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};
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template <typename Real>
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class FIQuery<Real, Line3<Real>, OrientedBox3<Real>>
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:
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public FIQuery<Real, Line3<Real>, AlignedBox3<Real>>
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{
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public:
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struct Result
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:
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public FIQuery<Real, Line3<Real>, AlignedBox3<Real>>::Result
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{
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// No additional relevant information to compute.
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};
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Result operator()(Line3<Real> const& line, OrientedBox3<Real> const& box)
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{
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// Transform the line to the oriented-box coordinate system.
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Vector3<Real> diff = line.origin - box.center;
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Vector3<Real> lineOrigin
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{
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Dot(diff, box.axis[0]),
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Dot(diff, box.axis[1]),
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Dot(diff, box.axis[2])
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};
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Vector3<Real> lineDirection
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{
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Dot(line.direction, box.axis[0]),
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Dot(line.direction, box.axis[1]),
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Dot(line.direction, box.axis[2])
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};
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Result result;
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this->DoQuery(lineOrigin, lineDirection, box.extent, result);
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for (int i = 0; i < result.numPoints; ++i)
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{
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result.point[i] =
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line.origin + result.lineParameter[i] * line.direction;
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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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