mirror of
https://github.com/tesseract-ocr/tesseract.git
synced 2024-11-28 13:49:35 +08:00
4523ce9f7d
git-svn-id: https://tesseract-ocr.googlecode.com/svn/trunk@526 d0cd1f9f-072b-0410-8dd7-cf729c803f20
55 lines
2.2 KiB
C
55 lines
2.2 KiB
C
/******************************************************************************
|
|
** Filename: fpoint.h
|
|
** Purpose: Abstract data type for 2D points (floating point coords)
|
|
** Author: Dan Johnson
|
|
** History: Thu Apr 12 10:50:01 1990, DSJ, Created.
|
|
**
|
|
** (c) Copyright Hewlett-Packard Company, 1988.
|
|
** Licensed under the Apache License, Version 2.0 (the "License");
|
|
** you may not use this file except in compliance with the License.
|
|
** You may obtain a copy of the License at
|
|
** http://www.apache.org/licenses/LICENSE-2.0
|
|
** Unless required by applicable law or agreed to in writing, software
|
|
** distributed under the License is distributed on an "AS IS" BASIS,
|
|
** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
** See the License for the specific language governing permissions and
|
|
** limitations under the License.
|
|
******************************************************************************/
|
|
#ifndef FPOINT_H
|
|
#define FPOINT_H
|
|
|
|
/**----------------------------------------------------------------------------
|
|
Include Files and Type Defines
|
|
----------------------------------------------------------------------------**/
|
|
#include "host.h"
|
|
#include <stdio.h>
|
|
#include <math.h>
|
|
|
|
/* define data structure to hold 2D points or vectors using floating point */
|
|
typedef struct
|
|
{
|
|
FLOAT32 x, y;
|
|
} FPOINT;
|
|
typedef FPOINT FVECTOR;
|
|
|
|
/**----------------------------------------------------------------------------
|
|
Macros
|
|
----------------------------------------------------------------------------**/
|
|
/* macros for computing miscellaneous functions of 2 points */
|
|
#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) ( atan2((double) YDelta(A,B), \
|
|
(double) XDelta(A,B) ) )
|
|
|
|
#define XIntersectionOf(A,B,X) ( SlopeFrom(A,B) * ((X) - A.x) + A.y)
|
|
|
|
/*-------------------------------------------------------------------------
|
|
Public Function Prototypes
|
|
---------------------------------------------------------------------------*/
|
|
|
|
FLOAT32 DistanceBetween(FPOINT A, FPOINT B);
|
|
|
|
FLOAT32 NormalizedAngleFrom(FPOINT *Point1, FPOINT *Point2, FLOAT32 FullScale);
|
|
#endif
|