Tesseract  3.02
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fpoint.h File Reference
#include "host.h"
#include <stdio.h>
#include <math.h>

Go to the source code of this file.

Classes

struct  FPOINT

Macros

#define XDelta(A, B)   ( (B).x - (A).x )
#define YDelta(A, B)   ( (B).y - (A).y )
#define SlopeFrom(A, B)   ( YDelta(A,B) / XDelta(A,B) )
#define AngleFrom(A, B)
#define XIntersectionOf(A, B, X)   ( SlopeFrom(A,B) * ((X) - A.x) + A.y)

Typedefs

typedef FPOINT FVECTOR

Functions

FLOAT32 DistanceBetween (FPOINT A, FPOINT B)
FLOAT32 NormalizedAngleFrom (FPOINT *Point1, FPOINT *Point2, FLOAT32 FullScale)

Macro Definition Documentation

#define AngleFrom (   A,
 
)
Value:
( atan2((double) YDelta(A,B), \
(double) XDelta(A,B) ) )

Definition at line 42 of file fpoint.h.

#define SlopeFrom (   A,
 
)    ( YDelta(A,B) / XDelta(A,B) )

Definition at line 41 of file fpoint.h.

#define XDelta (   A,
 
)    ( (B).x - (A).x )

Macros —————————————————————————-

Definition at line 39 of file fpoint.h.

#define XIntersectionOf (   A,
  B,
 
)    ( SlopeFrom(A,B) * ((X) - A.x) + A.y)

Definition at line 45 of file fpoint.h.

#define YDelta (   A,
 
)    ( (B).y - (A).y )

Definition at line 40 of file fpoint.h.


Typedef Documentation

typedef FPOINT FVECTOR

Definition at line 33 of file fpoint.h.


Function Documentation

FLOAT32 DistanceBetween ( FPOINT  A,
FPOINT  B 
)

Include Files and Type Defines —————————————————————————- ---------------------------------------------------------------------------- Public Code —————————————————————————-

Definition at line 31 of file fpoint.cpp.

{
double xd = XDelta(A, B);
double yd = YDelta(A, B);
return sqrt(static_cast<double>(xd * xd + yd * yd));
}
FLOAT32 NormalizedAngleFrom ( FPOINT Point1,
FPOINT Point2,
FLOAT32  FullScale 
)

Definition at line 39 of file fpoint.cpp.

{
/*
** Parameters:
** Point1, Point2 points to compute angle between
** FullScale value to associate with 2*pi
** Globals: none
** Operation: Return the angle from Point1 to Point2 normalized to
** lie in the range 0 to FullScale (where FullScale corresponds
** to 2*pi or 360 degrees).
** Return: none
** Exceptions: none
** History: Wed Mar 28 14:27:25 1990, DSJ, Created.
*/
FLOAT32 Angle;
FLOAT32 NumRadsInCircle = 2.0 * PI;
Angle = AngleFrom (*Point1, *Point2);
if (Angle < 0.0)
Angle += NumRadsInCircle;
Angle *= FullScale / NumRadsInCircle;
if (Angle < 0.0 || Angle >= FullScale)
Angle = 0.0;
return (Angle);
} /* NormalizedAngleFrom */