generic-library/opencv
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Merge pull request #2358 from rohitgirdhar:rotatedRect

Browse Source
This commit is contained in:
Roman Donchenko
2014-02-25 17:43:48 +04:00
committed by OpenCV Buildbot
parent 3693facd9e fd4461d543
commit c9a4a82667
4 changed files with 137 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

24
modules/core/src/matrix.cpp
View File

@@ -5204,6 +5204,30 @@ void normalize( const SparseMat& src, SparseMat& dst, double a, int norm_type )
////////////////////// RotatedRect //////////////////////
RotatedRect::RotatedRect(const Point2f& _point1, const Point2f& _point2, const Point2f& _point3)
{
Point2f _center = 0.5f * (_point1 + _point3);
Vec2f vecs[2];
vecs[0] = Vec2f(_point1 - _point2);
vecs[1] = Vec2f(_point2 - _point3);
// check that given sides are perpendicular
CV_Assert( abs(vecs[0].dot(vecs[1])) / (norm(vecs[0]) * norm(vecs[1])) <= FLT_EPSILON );
// wd_i stores which vector (0,1) or (1,2) will make the width
// One of them will definitely have slope within -1 to 1
int wd_i = 0;
if( abs(vecs[1][1]) < abs(vecs[1][0]) ) wd_i = 1;
int ht_i = (wd_i + 1) % 2;
float _angle = atan(vecs[wd_i][1] / vecs[wd_i][0]) * 180.0f / (float) CV_PI;
float _width = (float) norm(vecs[wd_i]);
float _height = (float) norm(vecs[ht_i]);
center = _center;
size = Size2f(_width, _height);
angle = _angle;
}
void RotatedRect::points(Point2f pt[]) const
{
double _angle = angle*CV_PI/180.;