53 lines
1.7 KiB
C
53 lines
1.7 KiB
C
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// This source code is property of the Computer Graphics and Visualization
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// chair of the TU Dresden. Do not distribute!
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// Copyright (C) CGV TU Dresden - All Rights Reserved
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#pragma once
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#include "Box.h"
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#include "GridUtils.h"
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#include <util/OpenMeshUtils.h>
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/*
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a 3d line segment primitive which can be used with the AABBTree and the HashGrid data structure
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*/
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class LineSegment
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{
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//internal storage of start point of line segment
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Eigen::Vector3f v0;
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//internal storage of end point of line segment
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Eigen::Vector3f v1;
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//internal storage for an edge handle
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//this edge handle can be used to optionally identify the edge in a halfedge mesh data structure instance
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OpenMesh::EdgeHandle h;
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public:
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//default constructor
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LineSegment();
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//constructs a line segment by the two end points v0, v1 without using the edge handle
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LineSegment(const Eigen::Vector3f& v0, const Eigen::Vector3f& v1);
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//construct a line segment from the edge e of the halfedge mesh m
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LineSegment(const HEMesh& m,const OpenMesh::EdgeHandle& e);
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//returns an axis aligned bounding box of the line segment
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Box ComputeBounds() const;
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//returns true if the line segment overlaps the given box b
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bool Overlaps(const Box& b) const;
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//returns the point with smallest distance topoint p which lies on the line segment
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Eigen::Vector3f ClosestPoint(const Eigen::Vector3f& p) const;
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//returns the squared distance between point p and the line segment
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float SqrDistance(const Eigen::Vector3f& p) const;
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//returns the euclidean distance between point p and the line segment
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float Distance(const Eigen::Vector3f& p) const;
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//returns a reference point which is on the line segment and is used to sort the primitive in the AABB tree construction
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Eigen::Vector3f ReferencePoint() const;
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};
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