1/*M///////////////////////////////////////////////////////////////////////////////////////
2//
3//  IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.
4//
5//  By downloading, copying, installing or using the software you agree to this license.
6//  If you do not agree to this license, do not download, install,
7//  copy or use the software.
8//
9//
10//                        Intel License Agreement
11//                For Open Source Computer Vision Library
12//
13// Copyright (C) 2000, Intel Corporation, all rights reserved.
14// Third party copyrights are property of their respective owners.
15//
16// Redistribution and use in source and binary forms, with or without modification,
17// are permitted provided that the following conditions are met:
18//
19//   * Redistribution's of source code must retain the above copyright notice,
20//     this list of conditions and the following disclaimer.
21//
22//   * Redistribution's in binary form must reproduce the above copyright notice,
23//     this list of conditions and the following disclaimer in the documentation
24//     and/or other materials provided with the distribution.
25//
26//   * The name of Intel Corporation may not be used to endorse or promote products
27//     derived from this software without specific prior written permission.
28//
29// This software is provided by the copyright holders and contributors "as is" and
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32// In no event shall the Intel Corporation or contributors be liable for any direct,
33// indirect, incidental, special, exemplary, or consequential damages
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35// loss of use, data, or profits; or business interruption) however caused
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38// the use of this software, even if advised of the possibility of such damage.
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40//M*/
41
42#ifndef _CV_GEOM_H_
43#define _CV_GEOM_H_
44
45/* Finds distance between two points */
46CV_INLINE  float  icvDistanceL2_32f( CvPoint2D32f pt1, CvPoint2D32f pt2 )
47{
48    float dx = pt2.x - pt1.x;
49    float dy = pt2.y - pt1.y;
50
51    return cvSqrt( dx*dx + dy*dy );
52}
53
54
55int  icvIntersectLines( double x1, double dx1, double y1, double dy1,
56                        double x2, double dx2, double y2, double dy2,
57                        double* t2 );
58
59
60void icvCreateCenterNormalLine( CvSubdiv2DEdge edge, double* a, double* b, double* c );
61
62void icvIntersectLines3( double* a0, double* b0, double* c0,
63                         double* a1, double* b1, double* c1,
64                         CvPoint2D32f* point );
65
66
67#define _CV_BINTREE_LIST()                                          \
68   struct _CvTrianAttr* prev_v;   /* pointer to the parent  element on the previous level of the tree  */    \
69   struct _CvTrianAttr* next_v1;   /* pointer to the child  element on the next level of the tree  */        \
70   struct _CvTrianAttr* next_v2;   /* pointer to the child  element on the next level of the tree  */
71
72typedef struct _CvTrianAttr
73{
74   CvPoint pt;    /* Coordinates x and y of the vertex  which don't lie on the base line LMIAT  */
75   char sign;             /*  sign of the triangle   */
76   double area;       /*   area of the triangle    */
77   double r1;   /*  The ratio of the height of triangle to the base of the triangle  */
78   double r2;  /*   The ratio of the projection of the left side of the triangle on the base to the base */
79   _CV_BINTREE_LIST()    /* structure double list   */
80}
81_CvTrianAttr;
82
83
84/* curvature: 0 - 1-curvature, 1 - k-cosine curvature. */
85CvStatus  icvApproximateChainTC89( CvChain*      chain,
86                                   int header_size,
87                                   CvMemStorage* storage,
88                                   CvSeq**   contour,
89                                   int method );
90
91#endif /*_IPCVGEOM_H_*/
92
93/* End of file. */
94