mirror of
https://github.com/tesseract-ocr/tesseract.git
synced 2024-12-16 02:09:30 +08:00
faae87beaa
On most systems float is the IEEE 754 single-precision binary floating-point format (32 bits). Tesseract does not support other systems. Signed-off-by: Stefan Weil <sw@weilnetz.de>
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
|
|
**
|
|
** (c) Copyright Hewlett-Packard Company, 1988.
|
|
** (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 <cmath>
|
|
#include <cstdio>
|
|
#include "host.h"
|
|
|
|
/* define data structure to hold 2D points or vectors using floating point */
|
|
typedef struct {
|
|
float x, y;
|
|
} FPOINT;
|
|
using FVECTOR = FPOINT;
|
|
|
|
/**----------------------------------------------------------------------------
|
|
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
|
|
---------------------------------------------------------------------------*/
|
|
|
|
float DistanceBetween(FPOINT A, FPOINT B);
|
|
|
|
float NormalizedAngleFrom(FPOINT* Point1, FPOINT* Point2, float FullScale);
|
|
|
|
#endif
|