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Function for drawing arrows

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Porting the [PR 2970](https://github.com/Itseez/opencv/pull/2970) To the new InputOutputArray type
This commit is contained in:
PhilLab
2014-07-17 09:19:31 +02:00
committed by unknown
parent 8f8450793a
commit e82241cba5
3 changed files with 53 additions and 0 deletions
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18
modules/core/src/drawing.cpp
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@@ -1584,6 +1584,24 @@ void line( InputOutputArray _img, Point pt1, Point pt2, const Scalar& color,
ThickLine( img, pt1, pt2, buf, thickness, line_type, 3, shift );
}
void arrowedLine(InputOutputArray img, Point pt1, Point pt2, const Scalar& color,
int thickness, int line_type, int shift, double tipLength)
{
const double tipSize = norm(pt1-pt2)*tipLength; // Factor to normalize the size of the tip depending on the length of the arrow
line(img, pt1, pt2, color, thickness, line_type, shift);
const double angle = atan2( (double) pt1.y - pt2.y, (double) pt1.x - pt2.x );
Point p(cvRound(pt2.x + tipSize * cos(angle + CV_PI / 4)),
cvRound(pt2.y + tipSize * sin(angle + CV_PI / 4)));
line(img, p, pt2, color, thickness, line_type, shift);
p.x = cvRound(pt2.x + tipSize * cos(angle - CV_PI / 4));
p.y = cvRound(pt2.y + tipSize * sin(angle - CV_PI / 4));
line(img, p, pt2, color, thickness, line_type, shift);
}
void rectangle( InputOutputArray _img, Point pt1, Point pt2,
const Scalar& color, int thickness,
int lineType, int shift )