CGI/exercise4/include/Box.h

82 lines
2.5 KiB
C
Raw Normal View History

2018-09-06 12:35:43 +00:00
// This source code is property of the Computer Graphics and Visualization
// chair of the TU Dresden. Do not distribute!
// Copyright (C) CGV TU Dresden - All Rights Reserved
#pragma once
#include <Eigen/Core>
class Box
{
//internal storage for lower and upper corner points of the box
std::pair<Eigen::Vector3f, Eigen::Vector3f> bounds;
public:
//creates an empty box like the method Clear
Box();
//construct a box with the gven lower and upper corner points
Box(const Eigen::Vector3f& lbound, const Eigen::Vector3f& ubound);
//returns the corner point which is the lower bound of the box in all dimensions
Eigen::Vector3f& LowerBound();
//returns the corner point which is the lower bound of the box in all dimensions
const Eigen::Vector3f& LowerBound() const;
//returns the corner point which is the upper bound of the box in all dimensions
Eigen::Vector3f& UpperBound();
//returns the corner point which is the upper bound of the box in all dimensions
const Eigen::Vector3f& UpperBound() const;
//returns a vector containing the extents of the box in all dimensions
Eigen::Vector3f Extents() const;
//returns a vector containing the extents of the box in all dimensions divided by 2
Eigen::Vector3f HalfExtents() const;
//returns the center of the box
Eigen::Vector3f Center() const;
//returns the surface area of the box
float SurfaceArea() const;
//returns the volume of the box
float Volume() const;
//returns the box radius for a given direction vector a
//if the box is centered at the origin
//then the projection of the box on direction a is contained within the Interval [-r,r]
float Radius(const Eigen::Vector3f& a) const;
//returns true if the box b overlaps with the current one
bool Overlaps(const Box& b) const;
//returns true if the point p is inside this box
bool IsInside(const Eigen::Vector3f& p) const;
//returns true if box b is inside this box
bool IsInside(const Box& b) const;
//creates a box which goes from [+infinity,- infinity] in al dimensions
void Clear();
//enlarges the box such that the point p is inside afterwards
void Insert(const Eigen::Vector3f& p);
//enlarges the box such that box b is inside afterwards
void Insert(const Box& b);
//returns the point on or inside the box with the smallest distance to p
Eigen::Vector3f ClosestPoint(const Eigen::Vector3f& p) const;
//returns the squared distance between p and the box
float SqrDistance(const Eigen::Vector3f& p) const;
//returns the euclidean distance between p and the box
float Distance(const Eigen::Vector3f& p) const;
};