integer coordinate More...

#include <points.h>

Inheritance diagram for ICOORD:

Public Member Functions
	ICOORD ()
	empty constructor More...

	ICOORD (inT16 xin, inT16 yin)

	~ICOORD ()
	destructor More...

inT16	x () const
	access function More...

inT16	y () const
	access_function More...

void	set_x (inT16 xin)
	rewrite function More...

void	set_y (inT16 yin)
	rewrite function More...

void	set_with_shrink (int x, int y)
	Set from the given x,y, shrinking the vector to fit if needed. More...

float	sqlength () const
	find sq length More...

float	length () const
	find length More...

float	pt_to_pt_sqdist (const ICOORD &pt) const
	sq dist between pts More...

float	pt_to_pt_dist (const ICOORD &pt) const
	Distance between pts. More...

float	angle () const
	find angle More...

BOOL8	operator== (const ICOORD &other) const
	test equality More...

BOOL8	operator!= (const ICOORD &other) const
	test inequality More...

void	rotate (const FCOORD &vec)

void	setup_render (ICOORD major_step, ICOORD minor_step, int major, int minor) const

bool	Serialize (FILE *fp) const

bool	DeSerialize (bool swap, FILE *fp)

Protected Attributes
inT16	xcoord

inT16	ycoord

Friends
class	FCOORD

ICOORD	operator! (const ICOORD &)
	rotate 90 deg anti More...

ICOORD	operator- (const ICOORD &)
	unary minus More...

ICOORD	operator+ (const ICOORD &, const ICOORD &)
	add More...

ICOORD &	operator+= (ICOORD &, const ICOORD &)
	add More...

ICOORD	operator- (const ICOORD &, const ICOORD &)
	subtract More...

ICOORD &	operator-= (ICOORD &, const ICOORD &)
	subtract More...

inT32	operator% (const ICOORD &, const ICOORD &)
	scalar product More...

inT32	operator* (const ICOORD &, const ICOORD &)
	cross product More...

ICOORD	operator* (const ICOORD &, inT16)
	multiply More...

ICOORD	operator* (inT16, const ICOORD &)
	multiply More...

ICOORD &	operator*= (ICOORD &, inT16)
	multiply More...

ICOORD	operator/ (const ICOORD &, inT16)
	divide More...

ICOORD &	operator/= (ICOORD &, inT16)
	divide More...

Detailed Description

integer coordinate

Definition at line 30 of file points.h.

Constructor & Destructor Documentation

ICOORD::ICOORD ( )

inline

empty constructor

Definition at line 36 of file points.h.

              {
       xcoord = ycoord = 0;       //default zero
     }

ICOORD::ICOORD	(	inT16	xin,
		inT16	yin
	)

inline

constructor

Parameters

xin	x value
yin	y value

Definition at line 42 of file points.h.

                       {
       xcoord = xin;
       ycoord = yin;
     }

ICOORD::~ICOORD ( )

inline

destructor

Definition at line 48 of file points.h.

48 {

49 }

Member Function Documentation

float ICOORD::angle ( ) const

inline

find angle

Definition at line 97 of file points.h.

                         {
       return (float) atan2 ((double) ycoord, (double) xcoord);
     }

bool ICOORD::DeSerialize	(	bool	swap,
		FILE *	fp
	)

Definition at line 70 of file points.cpp.

                                             {
   if (fread(&xcoord, sizeof(xcoord), 1, fp) != 1) return false;
   if (fread(&ycoord, sizeof(ycoord), 1, fp) != 1) return false;
   if (swap) {
     ReverseN(&xcoord, sizeof(xcoord));
     ReverseN(&ycoord, sizeof(ycoord));
   }
   return true;
 }

float ICOORD::length ( ) const

inline

find length

Definition at line 78 of file points.h.

                          {
       return (float) sqrt (sqlength ());
     }

BOOL8 ICOORD::operator!= ( const ICOORD & other ) const

inline

test inequality

Definition at line 106 of file points.h.

                                                   {
       return xcoord != other.xcoord || ycoord != other.ycoord;
     }

BOOL8 ICOORD::operator== ( const ICOORD & other ) const

inline

test equality

Definition at line 102 of file points.h.

                                                   {
       return xcoord == other.xcoord && ycoord == other.ycoord;
     }

float ICOORD::pt_to_pt_dist ( const ICOORD & pt ) const

inline

Distance between pts.

Definition at line 92 of file points.h.

                                                 {
       return (float) sqrt (pt_to_pt_sqdist (pt));
     }

float ICOORD::pt_to_pt_sqdist ( const ICOORD & pt ) const

inline

sq dist between pts

Definition at line 83 of file points.h.

                                                   {
       ICOORD gap;
 
       gap.xcoord = xcoord - pt.xcoord;
       gap.ycoord = ycoord - pt.ycoord;
       return gap.sqlength ();
     }

void ICOORD::rotate ( const FCOORD & vec )

inline

rotate

Parameters

vec by vector

Definition at line 241 of file ipoints.h.

                                               {
   inT16 tmp;
 
   tmp = (inT16) floor (xcoord * vec.x () - ycoord * vec.y () + 0.5);
   ycoord = (inT16) floor (ycoord * vec.x () + xcoord * vec.y () + 0.5);
   xcoord = tmp;
 }

bool ICOORD::Serialize ( FILE * fp ) const

Definition at line 63 of file points.cpp.

                                      {
   if (fwrite(&xcoord, sizeof(xcoord), 1, fp) != 1) return false;
   if (fwrite(&ycoord, sizeof(ycoord), 1, fp) != 1) return false;
   return true;
 }

void ICOORD::set_with_shrink	(	int	x,
		int	y
	)

Set from the given x,y, shrinking the vector to fit if needed.

Definition at line 43 of file points.cpp.

                                          {
   // Fit the vector into an ICOORD, which is 16 bit.
   int factor = 1;
   int max_extent = MAX(abs(x), abs(y));
   if (max_extent > MAX_INT16)
     factor = max_extent / MAX_INT16 + 1;
   xcoord = x / factor;
   ycoord = y / factor;
 }

void ICOORD::set_x ( inT16 xin )

inline

rewrite function

Definition at line 61 of file points.h.

                           {
       xcoord = xin;              //write new value
     }

void ICOORD::set_y ( inT16 yin )

inline

rewrite function

Definition at line 65 of file points.h.

                           {  //value to set
       ycoord = yin;
     }

void ICOORD::setup_render	(	ICOORD *	major_step,
		ICOORD *	minor_step,
		int *	major,
		int *	minor
	)		const

Setup for iterating over the pixels in a vector by the well-known Bresenham rendering algorithm. Starting with major/2 in the accumulator, on each step move by major_step, and then add minor to the accumulator. When accumulator >= major subtract major and also move by minor_step.

Definition at line 86 of file points.cpp.

                                                         {
   int abs_x = abs(xcoord);
   int abs_y = abs(ycoord);
   if (abs_x >= abs_y) {
     // X-direction is major.
     major_step->xcoord = sign(xcoord);
     major_step->ycoord = 0;
     minor_step->xcoord = 0;
     minor_step->ycoord = sign(ycoord);
     *major = abs_x;
     *minor = abs_y;
   } else {
     // Y-direction is major.
     major_step->xcoord = 0;
     major_step->ycoord = sign(ycoord);
     minor_step->xcoord = sign(xcoord);
     minor_step->ycoord = 0;
     *major = abs_y;
     *minor = abs_x;
   }
 }

float ICOORD::sqlength ( ) const

inline

find sq length

Definition at line 73 of file points.h.

                            {
       return (float) (xcoord * xcoord + ycoord * ycoord);
     }

inT16 ICOORD::x ( ) const

inline

access function

Definition at line 52 of file points.h.

                     {
       return xcoord;
     }

inT16 ICOORD::y ( ) const

inline

access_function

Definition at line 56 of file points.h.

                     {
       return ycoord;
     }

Friends And Related Function Documentation

friend class FCOORD

friend

Definition at line 32 of file points.h.

ICOORD operator! ( const ICOORD & src )

friend

rotate 90 deg anti

Definition at line 32 of file ipoints.h.

   {
   ICOORD result;                 //output
 
   result.xcoord = -src.ycoord;
   result.ycoord = src.xcoord;
   return result;
 }

inT32 operator%	(	const ICOORD &	op1,
		const ICOORD &	op2
	)

friend

scalar product

Definition at line 136 of file ipoints.h.

                     {
   return op1.xcoord * op2.xcoord + op1.ycoord * op2.ycoord;
 }

inT32 operator*	(	const ICOORD &	op1,
		const ICOORD &	op2
	)

friend

cross product

Definition at line 149 of file ipoints.h.

                                            {
   return op1.xcoord * op2.ycoord - op1.ycoord * op2.xcoord;
 }

ICOORD operator*	(	const ICOORD &	op1,
		inT16	scale
	)

friend

multiply

Definition at line 162 of file ipoints.h.

                                       {
   ICOORD result;                 //output
 
   result.xcoord = op1.xcoord * scale;
   result.ycoord = op1.ycoord * scale;
   return result;
 }

ICOORD operator*	(	inT16	scale,
		const ICOORD &	op1
	)

friend

multiply

Definition at line 173 of file ipoints.h.

                           {
   ICOORD result;                 //output
 
   result.xcoord = op1.xcoord * scale;
   result.ycoord = op1.ycoord * scale;
   return result;
 }

ICOORD& operator*=	(	ICOORD &	op1,
		inT16	scale
	)

friend

multiply

Definition at line 192 of file ipoints.h.

              {
   op1.xcoord *= scale;
   op1.ycoord *= scale;
   return op1;
 }

ICOORD operator+	(	const ICOORD &	op1,
		const ICOORD &	op2
	)

friend

add

Definition at line 68 of file ipoints.h.

                     {
   ICOORD sum;                    //result
 
   sum.xcoord = op1.xcoord + op2.xcoord;
   sum.ycoord = op1.ycoord + op2.ycoord;
   return sum;
 }

ICOORD& operator+=	(	ICOORD &	op1,
		const ICOORD &	op2
	)

friend

add

Definition at line 86 of file ipoints.h.

                     {
   op1.xcoord += op2.xcoord;
   op1.ycoord += op2.ycoord;
   return op1;
 }

ICOORD operator- ( const ICOORD & src )

friend

unary minus

Definition at line 50 of file ipoints.h.

   {
   ICOORD result;                 //output
 
   result.xcoord = -src.xcoord;
   result.ycoord = -src.ycoord;
   return result;
 }

ICOORD operator-	(	const ICOORD &	op1,
		const ICOORD &	op2
	)

friend

subtract

Definition at line 102 of file ipoints.h.

                     {
   ICOORD sum;                    //result
 
   sum.xcoord = op1.xcoord - op2.xcoord;
   sum.ycoord = op1.ycoord - op2.ycoord;
   return sum;
 }

ICOORD& operator-=	(	ICOORD &	op1,
		const ICOORD &	op2
	)

friend

subtract

Definition at line 120 of file ipoints.h.

                     {
   op1.xcoord -= op2.xcoord;
   op1.ycoord -= op2.ycoord;
   return op1;
 }

ICOORD operator/	(	const ICOORD &	op1,
		inT16	scale
	)

friend

divide

Definition at line 208 of file ipoints.h.

              {
   ICOORD result;                 //output
 
   result.xcoord = op1.xcoord / scale;
   result.ycoord = op1.ycoord / scale;
   return result;
 }

ICOORD& operator/=	(	ICOORD &	op1,
		inT16	scale
	)

friend

divide

Definition at line 226 of file ipoints.h.

              {
   op1.xcoord /= scale;
   op1.ycoord /= scale;
   return op1;
 }

Member Data Documentation

inT16 ICOORD::xcoord

protected

Definition at line 157 of file points.h.

inT16 ICOORD::ycoord

protected

Definition at line 158 of file points.h.

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

ccstruct/points.h
ccstruct/ipoints.h
ccstruct/points.cpp

Public Member Functions

Protected Attributes

Friends

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Friends And Related Function Documentation

Member Data Documentation