Point Class Reference

Class representing a 3D point. More...

#include <matrix.h>

List of all members.

Public Member Functions
	Point ()
	Default constructor. Initializes point to (0,0,0).
	Point (float s)
	Constructor initializing all elements to the given value.
	Point (float _x, float _y, float _z)
	Constructor initializing point to (x,y,z).
virtual	~Point ()
	Destructor. Does nothing.
float	operator() (int i) const
	Returns a copy of the element at position (i).
float &	operator() (int i)
	Returns a reference to the element at position (i).
Point	operator+ (const Vector &v) const
	Addition of point and vector.
Point	operator+ (const Point &p) const
	Addition of two points. Not mathematically sensible but convenient to have.
Point &	operator+= (float s)
	Addition of scalar in place.
Point	operator- (const Vector &v) const
	Subtraction of point and vector.
Point	operator- (const Point &p) const
	Subtraction of two points. Not mathematically sensible but convenient to have.
Point &	operator-= (float s)
	Subtraction of scalar in place.
Public Attributes
float	x
	First component.
float	y
	Second component.
float	z
	Third component.
Friends
std::ostream &	operator<< (std::ostream &os, const Point &A)
	Write elements to an output stream.

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Detailed Description

Class representing a 3D point.

The main difference between Point and Vector is how they are transformed by a transformation matrix. The point is assumed to have the 4th component set to 1, so that it is affected by translations, while the vector just represents a direction and hence is not affected by translations.

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The documentation for this class was generated from the following file:

• matrix.h

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