Point4 Class Reference

#include <point4.h>

Class Description

See also

Class Point3.

Description:

This class describes a point using float x, y, z and w coordinates. Methods are provided to add and subtract points, multiply and divide by scalars, and element by element multiply and divide two points.

Data Members:

float x, y, z, w;

The x, y, z and w components of the point.

static const Point4 Origin;

This is equivalent to Point4(0.0f, 0.0f, 0.0f, 0.0f);

static const Point4 XAxis;

This is equivalent to Point4(1.0f, 0.0f, 0.0f, 0.0f);

static const Point4 YAxis;

This is equivalent to Point4(0.0f,1.0f, 0.0f, 0.0f);

static const Point4 ZAxis;

This is equivalent to Point4(0.0f, 0.0f,1.0f, 0.0f);

static const Point4 WAxis;

This is equivalent to Point4(0.0f, 0.0f, 0.0f,1.0f);

Inheritance diagram for Point4:

Public Member Functions
	Point4 ()
	Initializes vector components to zero. More...
	Point4 (float X, float Y, float Z, float W)
	Point4 (double X, double Y, double Z, double W)
	Point4 (int X, int Y, int Z, int W)
	Point4 (const Point3 &a, float W=0.0f)
	Point4 (const Point4 &a)
	Point4 (const float af[4])
float &	operator[] (int i)
const float &	operator[] (int i) const
	operator float * ()
Point4	operator- () const
Point4	operator+ () const
float	Length () const
float	FLength () const
float	LengthSquared () const
int	MaxComponent () const
int	MinComponent () const
Point4	Normalize () const
Point4	FNormalize () const
Point4 &	operator-= (const Point4 &)
Point4 &	operator+= (const Point4 &)
Point4 &	operator*= (float)
Point4 &	operator/= (float)
Point4 &	operator*= (const Point4 &)
Point4 &	Set (float X, float Y, float Z, float W)
int	operator== (const Point4 &p) const
int	operator!= (const Point4 &p) const
int	Equals (const Point4 &p, float epsilon=1E-6f)
Point4 &	Unify ()
float	LengthUnify ()
Point4	operator- (const Point4 &) const
Point4	operator+ (const Point4 &) const
Point4	operator/ (const Point4 &) const
Point4	operator* (const Point4 &) const
float	operator% (const Point4 &) const

Public Attributes
float	x
float	y
float	z
float	w

Static Public Attributes
static const Point4	Origin
static const Point4	XAxis
static const Point4	YAxis
static const Point4	ZAxis
static const Point4	WAxis

Additional Inherited Members
Static Public Member Functions inherited from MaxHeapOperators
static UtilExport void *	operator new (size_t size)
	Standard new operator used to allocate objects If there is insufficient memory, an exception will be thrown. More...
static UtilExport void *	operator new (size_t size, const std::nothrow_t &e)
	Standard new operator used to allocate objects if there is insufficient memory, NULL will be returned. More...
static UtilExport void *	operator new (size_t size, const char *filename, int line)
	New operator used to allocate objects that takes the filename and line number where the new was called If there is insufficient memory, an exception will be thrown. More...
static UtilExport void *	operator new (size_t size, int block_type, const char *filename, int line)
	New operator used to allocate objects that takes the type of memory, filename and line number where the new was called If there is insufficient memory, an exception will be thrown. More...
static UtilExport void *	operator new (size_t size, const std::nothrow_t &e, const char *filename, int line)
	New operator used to allocate objects that takes the filename and line number where the new was called If there is insufficient memory, NULL will be returned. More...
static UtilExport void *	operator new (size_t size, unsigned long flags)
	New operator used to allocate objects that takes extra flags to specify special operations If there is insufficient memory, an exception will be thrown. More...
static UtilExport void *	operator new (size_t size, const std::nothrow_t &e, unsigned long flags)
	New operator used to allocate objects that takes extra flags to specify special operations If there is insufficient memory, NULL will be returned. More...
static UtilExport void *	operator new[] (size_t size)
	New operator used to allocate arrays of objects If there is insufficient memory, an exception will be thrown. More...
static UtilExport void *	operator new[] (size_t size, const std::nothrow_t &e)
	New operator used to allocate arrays of objects If there is insufficient memory, NULL will be returned. More...
static UtilExport void *	operator new[] (size_t size, const char *filename, int line)
	New operator used to allocate arrays of objects If there is insufficient memory, an exception will be thrown. More...
static UtilExport void *	operator new[] (size_t size, int block_type, const char *filename, int line)
	New operator used to allocate arrays of objects. More...
static UtilExport void *	operator new[] (size_t size, const std::nothrow_t &e, const char *filename, int line)
	New operator used to allocate arrays of objects If there is insufficient memory, NULL will be returned. More...
static UtilExport void *	operator new[] (size_t size, unsigned long flags)
	New operator used to allocate arrays of objects If there is insufficient memory, an exception will be thrown. More...
static UtilExport void *	operator new[] (size_t size, const std::nothrow_t &e, unsigned long flags)
	New operator used to allocate arrays of objects If there is insufficient memory, NULL will be returned. More...
static UtilExport void	operator delete (void *ptr)
	Standard delete operator used to deallocate an object If the pointer is invalid, an exception will be thrown. More...
static UtilExport void	operator delete (void *ptr, const std::nothrow_t &e)
	Standard delete operator used to deallocate an object If the pointer is invalid, nothing will happen. More...
static UtilExport void	operator delete (void *ptr, const char *filename, int line)
	Delete operator used to deallocate an object that takes the filename and line number where the delete was called If the pointer is invalid, an exception will be thrown. More...
static UtilExport void	operator delete (void *ptr, int block_type, const char *filename, int line)
	Delete operator used to deallocate an object that takes the type of memory, filename and line number where the delete was called If the pointer is invalid, an exception will be thrown. More...
static UtilExport void	operator delete (void *ptr, const std::nothrow_t &e, const char *filename, int line)
	Delete operator used to deallocate an object that takes the filename and line number where the delete was called If the pointer is invalid, nothing will happen. More...
static UtilExport void	operator delete (void *ptr, unsigned long flags)
	Delete operator used to deallocate an object that takes extra flags to specify special operations If the pointer is invalid, an exception will be thrown. More...
static UtilExport void	operator delete (void *ptr, const std::nothrow_t &e, unsigned long flags)
	Delete operator used to deallocate an object that takes extra flags to specify special operations If the pointer is invalid, nothing will happen. More...
static UtilExport void	operator delete[] (void *ptr)
	Standard delete operator used to deallocate an array of objects If the pointer is invalid, an exception will be thrown. More...
static UtilExport void	operator delete[] (void *ptr, const std::nothrow_t &e)
	Standard delete operator used to deallocate an array of objects If the pointer is invalid, nothing will happen. More...
static UtilExport void	operator delete[] (void *ptr, const char *filename, int line)
	Delete operator used to deallocate an array of objects that takes the filename and line number where the delete was called If the pointer is invalid, an exception will be thrown. More...
static UtilExport void	operator delete[] (void *ptr, int block_type, const char *filename, int line)
	Delete operator used to deallocate an array of objects that takes the type of memory, filename and line number where the delete was called If the pointer is invalid, an exception will be thrown. More...
static UtilExport void	operator delete[] (void *ptr, const std::nothrow_t &e, const char *filename, int line)
	Delete operator used to deallocate an array of objects that takes the filename and line number where the delete was called If the pointer is invalid, nothing will happen. More...
static UtilExport void	operator delete[] (void *ptr, unsigned long flags)
	Delete operator used to deallocate an array of objects that takes extra flags to specify special operations If the pointer is invalid, an exception will be thrown. More...
static UtilExport void	operator delete[] (void *ptr, const std::nothrow_t &e, unsigned long flags)
	Delete operator used to deallocate an array of objects that takes extra flags to specify special operations If the pointer is invalid, an exception will be thrown. More...
static UtilExport void *	operator new (size_t size, void *placement_ptr)
	Placement new operator. More...
static UtilExport void	operator delete (void *ptr, void *placement_ptr)
	Placement delete operator. More...

Constructor & Destructor Documentation

Point4 ( )

inline

Initializes vector components to zero.

: x(0.0f), y(0.0f), z(0.0f), w(0.0f) { }

Point4 ( float  X, float  Y, float  Z, float  W  )

inline

Remarks

Constructor. x, y, z and w are initialized to the values specified.

                                               { 
         x = X; y = Y; z = Z; w = W; 
     }

Point4 ( double  X, double  Y, double  Z, double  W  )

inline

Remarks

Constructor. x, y, z and w are initialized to the specified values (cast as floats).

                                                  { 
         x = (float)X; y = (float)Y; z = (float)Z; w = (float)W; 
     }

Point4 ( int  X, int  Y, int  Z, int  W  )

inline

Remarks

Constructor. x, y, z and w are initialized to the specified values (cast as floats).

                                      { 
         x = (float)X; y = (float)Y; z = (float)Z; w = (float)W; 
     }

Point4 ( const Point3 &  a, float  W = 0.0f  )

inline

Remarks

Constructor. x, y, z and w are initialized to the specified Point3 and W.

                                         { 
         x = a.x; y = a.y; z = a.z; w = W; 
     } 

Point4 ( const Point4 &  a )

inline

                             { 
         x = a.x; y = a.y; z = a.z; w = a.w; 
     } 

Point4 ( const float  af[4] )

inline

Remarks

Constructor. x, y, z and w are initialized to af[0], af[1], af[2] and af[3] respectively.

                              { 
         x = af[0]; y = af[1]; z = af[2]; w = af[3]; 
     }

Member Function Documentation

float& operator[] ( int  i )

inline

Remarks

Allows access to x, y, z and w using the subscript operator.

Returns

An value for i of 0 will return x, 1 will return y, 2 will return z and 3 will return w.

                             { 
        DbgAssert((i >= 0) && (i <= 3));
        return (&x)[i];
     }     

const float& operator[] ( int  i ) const

inline

Remarks

Allows access to x, y, z and w using the subscript operator.

Returns

An value for i of 0 will return x, 1 will return y, 2 will return z and 3 will return w.

                                         { 
        DbgAssert((i >= 0) && (i <= 3));
        return (&x)[i]; 
     }  

operator float * ( )

inline

Remarks

Conversion function. Returns the address of the Point4.x

                     { 
         return(&x); 
     }

Point4 operator- ( ) const

inline

Remarks

Unary - operator. Negates x, y, z and w.

                            { 
         return(Point4(-x,-y,-z, -w)); 
     } 

Point4 operator+ ( ) const

inline

Remarks

Unary +. Returns the Point4.

                            { 
         return *this; 
     } 

float Length ( ) const

inline

                                  {  
   return (float)sqrt(x*x+y*y+z*z+w*w);
}

float FLength ( ) const

inline

                                   { 
   return Sqrt(x*x+y*y+z*z+w*w);
}

float LengthSquared ( ) const

inline

                                         { 
   return (x*x+y*y+z*z+w*w);
}

int MaxComponent

(

)

const

int MinComponent

(

)

const

Point4 Normalize

(

)

const

Point4 FNormalize

(

)

const

Point4 & operator-= ( const Point4 &  a )

inline

Remarks

Subtracts a Point4 from this Point4.

Returns

A Point4 that is the difference between two Point4s.

                                                 {  
   x -= a.x;   y -= a.y;   z -= a.z; w -= a.w;

   return *this;
   }

Point4 & operator+= ( const Point4 &  a )

inline

Remarks

Adds a Point4 to this Point4.

Returns

A Point4 that is the sum of two Point4s.

                                                 {
   x += a.x;   y += a.y;   z += a.z; w += a.w;
   return *this;
   }

Point4 & operator*= ( float  f )

inline

Remarks

Multiplies this Point4 by a floating point value.

Returns

A Point4 multiplied by a float.

                                         {
   x *= f;   y *= f; z *= f; w *= f;

   return *this;
   }

Point4 & operator/= ( float  f )

inline

Remarks

Divides this Point4 by a floating point value.

Returns

A Point4 divided by a float.

                                         { 
   if (f==0.0f) f = .000001f;
   x /= f;  y /= f;  z /= f;   w /= f;

   return *this; 
   }

Point4 & operator*= ( const Point4 &  a )

inline

Remarks

Element-by-element multiplication of two Point4s:

(x*x, y*y, z*z, w*w).

Returns

A Point4 element-by-element multiplied by another Point4.

                                                 { 
   x *= a.x;   y *= a.y;   z *= a.z;   w *= a.w;

   return *this; 
   }

Point4 & Set ( float  X, float  Y, float  Z, float  W  )

inline

Remarks

Sets the x, y, z and w coordinate to the values passed and returns a reference to this Point4.

Parameters:

float X

The new x value.

float Y

The new y value.

float Z

The new z value.

float W

The new w value.

Returns

A reference to this Point4.

                                                             {
    x = X;
    y = Y;
    z = Z;
    w = W;

    return *this;
    }

int operator== ( const Point4 &  p ) const

inline

Remarks

Equality operator. Test for equality between two Point4's.

Returns

Nonzero if the Point4's are equal; otherwise 0.

                                         { 
         return ((p.x==x)&&(p.y==y)&&(p.z==z)&&(p.w==w)); 
     }

int operator!= ( const Point4 &  p ) const

inline

                                         { 
         return ((p.x!=x)||(p.y!=y)||(p.z!=z)||(p.w!=w)); 
     }

int Equals ( const Point4 &  p, float  epsilon = 1E-6f  )

inline

Remarks

Compares this Point4 and the specified one to see if the x, y, z and w values are within plus or minus the specified tolerance.

Parameters:

const Point4& p

The point to compare.

float epsilon = 1E-6f

The tolerance to use in the comparison.

Returns

Nonzero if the points are 'equal'; otherwise zero.

Operators:

                                                        {
    return (fabs(p.x - x) <= epsilon && fabs(p.y - y) <= epsilon
            && fabs(p.z - z) <= epsilon && fabs(p.w - w) <= epsilon);
    }

Point4& Unify

(

)

float LengthUnify

(

)

Point4 operator- ( const Point4 &  b ) const

inline

Remarks

Subtracts a Point4 from a Point4.

Returns

A Point4 that is the difference between two Point4s.

                                                     {
   return(Point4(x-b.x,y-b.y,z-b.z, w-b.w));
   }

Point4 operator+ ( const Point4 &  b ) const

inline

Remarks

Adds a Point4 to a Point4.

Returns

A Point4 that is the sum of two Point4s.

                                                     {
   return(Point4(x+b.x,y+b.y,z+b.z, w+b.w));
   }

Point4 operator/ ( const Point4 &  b ) const

inline

Remarks

Divides a Point4 by a Point4 element by element.

Returns

A Point4 resulting from dividing a Point4 by a Point4 element by element.

                                                     {
   assert(b.x != 0.0f && b.y != 0.0f && b.z != 0.0f && b.w != 0.0f);
   return Point4(x/b.x,y/b.y,z/b.z,w/b.w);
   }

Point4 operator* ( const Point4 &  b ) const

inline

Remarks

Multiplies a Point4 by a Point4 element by element.

(x*x, y*y, z*z, w*w).

Returns

A Point4 resulting from the multiplication of a Point4 and a Point4.

                                                     {  
   return Point4(x*b.x, y*b.y, z*b.z,w*b.w); 
   }

float operator% ( const Point4 &  b ) const

inline

                                                    {
   return (x*b.x + y*b.y + z*b.z + w*b.w);
}

Member Data Documentation

float x

float y

float z

float w

const Point4 Origin

static

const Point4 XAxis

static

const Point4 YAxis

static

const Point4 ZAxis

static

const Point4 WAxis

static