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Merge pull request #23342 from n0099:#23335

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Improve document of cv::RotatedRect for #23335 #23342

fix #23335

### Pull Request Readiness Checklist

See details at https://github.com/opencv/opencv/wiki/How_to_contribute#making-a-good-pull-request

- [x] I agree to contribute to the project under Apache 2 License.
- [x] To the best of my knowledge, the proposed patch is not based on a code under GPL or another license that is incompatible with OpenCV
- [x] The PR is proposed to the proper branch
- [x] There is a reference to the original bug report and related work
- [x] There is accuracy test, performance test and test data in opencv_extra repository, if applicable
      Patch to opencv_extra has the same branch name.
- [x] The feature is well documented and sample code can be built with the project CMake
This commit is contained in:
n0099 2023-05-03 19:15:53 +08:00 committed by GitHub
parent 3c76b33532
commit 868787c364
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3 changed files with 10 additions and 2 deletions
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modules/core/doc/pics/rotatedrect.png
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7
modules/core/include/opencv2/core/types.hpp
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@ -545,8 +545,11 @@ public:
*/
RotatedRect(const Point2f& point1, const Point2f& point2, const Point2f& point3);
/** returns 4 vertices of the rectangle
@param pts The points array for storing rectangle vertices. The order is bottomLeft, topLeft, topRight, bottomRight.
/** returns 4 vertices of the rotated rectangle
@param pts The points array for storing rectangle vertices. The order is _bottomLeft_, _topLeft_, topRight, bottomRight.
@note _Bottom_, _Top_, _Left_ and _Right_ sides refer to the original rectangle (angle is 0),
so after 180 degree rotation _bottomLeft_ point will be located at the top right corner of the
rectangle.
*/
void points(Point2f pts[]) const;
//! returns the minimal up-right integer rectangle containing the rotated rectangle

5
samples/cpp/tutorial_code/snippets/core_various.cpp
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@ -38,6 +38,8 @@ int main()
waitKey(0);
//! [Algorithm]
const char * vertex_names[4] {"0", "1", "2", "3"};
//! [RotatedRect_demo]
Mat test_image(200, 200, CV_8UC3, Scalar(0));
RotatedRect rRect = RotatedRect(Point2f(100,100), Size2f(100,50), 30);
@ -45,7 +47,10 @@ int main()
Point2f vertices[4];
rRect.points(vertices);
for (int i = 0; i < 4; i++)
{
line(test_image, vertices[i], vertices[(i+1)%4], Scalar(0,255,0), 2);
putText(test_image, vertex_names[i], vertices[i], FONT_HERSHEY_SIMPLEX, 1, Scalar(255,255,255));
}
Rect brect = rRect.boundingRect();
rectangle(test_image, brect, Scalar(255,0,0), 2);