Tesseract  3.02
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fpoint.cpp
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1 /******************************************************************************
2  ** Filename: fpoint.c
3  ** Purpose: Abstract data type for a 2D point (floating point coords)
4  ** Author: Dan Johnson
5  ** History: Thu Apr 12 10:44:15 1990, DSJ, Created.
6  **
7  ** (c) Copyright Hewlett-Packard Company, 1988.
8  ** Licensed under the Apache License, Version 2.0 (the "License");
9  ** you may not use this file except in compliance with the License.
10  ** You may obtain a copy of the License at
11  ** http://www.apache.org/licenses/LICENSE-2.0
12  ** Unless required by applicable law or agreed to in writing, software
13  ** distributed under the License is distributed on an "AS IS" BASIS,
14  ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15  ** See the License for the specific language governing permissions and
16  ** limitations under the License.
17  ******************************************************************************/
21 #include "const.h"
22 #include "fpoint.h"
23 #include <stdio.h>
24 #include <math.h>
25 
29 /*---------------------------------------------------------------------------*/
30 
32  double xd = XDelta(A, B);
33  double yd = YDelta(A, B);
34  return sqrt(static_cast<double>(xd * xd + yd * yd));
35 }
36 
37 
38 
40  FPOINT *Point2,
41  FLOAT32 FullScale) {
42 /*
43  ** Parameters:
44  ** Point1, Point2 points to compute angle between
45  ** FullScale value to associate with 2*pi
46  ** Globals: none
47  ** Operation: Return the angle from Point1 to Point2 normalized to
48  ** lie in the range 0 to FullScale (where FullScale corresponds
49  ** to 2*pi or 360 degrees).
50  ** Return: none
51  ** Exceptions: none
52  ** History: Wed Mar 28 14:27:25 1990, DSJ, Created.
53  */
54  FLOAT32 Angle;
55  FLOAT32 NumRadsInCircle = 2.0 * PI;
56 
57  Angle = AngleFrom (*Point1, *Point2);
58  if (Angle < 0.0)
59  Angle += NumRadsInCircle;
60  Angle *= FullScale / NumRadsInCircle;
61  if (Angle < 0.0 || Angle >= FullScale)
62  Angle = 0.0;
63  return (Angle);
64 
65 } /* NormalizedAngleFrom */