80 lines
2.5 KiB
C++
80 lines
2.5 KiB
C++
// 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 <Eigen/Core>
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class Box
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{
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//internal storage for lower and upper corner points of the box
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std::pair<Eigen::Vector3f, Eigen::Vector3f> bounds;
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public:
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//creates an empty box like the method Clear
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Box();
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//construct a box with the gven lower and upper corner points
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Box(const Eigen::Vector3f &lbound, const Eigen::Vector3f &ubound);
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//returns the corner point which is the lower bound of the box in all dimensions
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Eigen::Vector3f &LowerBound();
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//returns the corner point which is the lower bound of the box in all dimensions
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const Eigen::Vector3f &LowerBound() const;
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//returns the corner point which is the upper bound of the box in all dimensions
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Eigen::Vector3f &UpperBound();
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//returns the corner point which is the upper bound of the box in all dimensions
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const Eigen::Vector3f &UpperBound() const;
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//returns a vector containing the extents of the box in all dimensions
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Eigen::Vector3f Extents() const;
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//returns a vector containing the extents of the box in all dimensions divided by 2
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Eigen::Vector3f HalfExtents() const;
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//returns the center of the box
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Eigen::Vector3f Center() const;
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//returns the surface area of the box
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float SurfaceArea() const;
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//returns the volume of the box
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float Volume() const;
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//returns the box radius for a given direction vector a
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//if the box is centered at the origin
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//then the projection of the box on direction a is contained within the Interval [-r,r]
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float Radius(const Eigen::Vector3f &a) const;
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//returns true if the box b overlaps with the current one
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bool Overlaps(const Box &b) const;
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//returns true if the point p is inside this box
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bool IsInside(const Eigen::Vector3f &p) const;
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//returns true if box b is inside this box
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bool IsInside(const Box &b) const;
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//creates a box which goes from [+infinity,- infinity] in al dimensions
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void Clear();
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//enlarges the box such that the point p is inside afterwards
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void Insert(const Eigen::Vector3f &p);
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//enlarges the box such that box b is inside afterwards
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void Insert(const Box &b);
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//returns the point on or inside the box with the smallest distance to p
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Eigen::Vector3f ClosestPoint(const Eigen::Vector3f &p) const;
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//returns the squared distance between p and the box
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float SqrDistance(const Eigen::Vector3f &p) const;
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//returns the euclidean distance between p and the box
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float Distance(const Eigen::Vector3f &p) const;
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};
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