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Merge pull request #2970 from PhilLab:patch-3

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Vadim Pisarevsky
2014-07-16 19:26:46 +00:00
parent 6c5dc17a1e d0c3c4c373
commit 0b4e043442
3 changed files with 53 additions and 0 deletions
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30
modules/core/doc/drawing_functions.rst
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@@ -371,6 +371,36 @@ Draws a line segment connecting two points.
The function ``line`` draws the line segment between ``pt1`` and ``pt2`` points in the image. The line is clipped by the image boundaries. For non-antialiased lines with integer coordinates, the 8-connected or 4-connected Bresenham algorithm is used. Thick lines are drawn with rounding endings.
Antialiased lines are drawn using Gaussian filtering. To specify the line color, you may use the macro ``CV_RGB(r, g, b)`` .
arrowedLine
----------------
Draws a arrow segment pointing from the first point to the second one.
.. ocv:function:: void arrowedLine(Mat& img, Point pt1, Point pt2, const Scalar& color, int thickness=1, int lineType=8, int shift=0, double tipLength=0.1)
:param img: Image.
:param pt1: The point the arrow starts from.
:param pt2: The point the arrow points to.
:param color: Line color.
:param thickness: Line thickness.
:param lineType: Type of the line:
* **8** (or omitted) - 8-connected line.
* **4** - 4-connected line.
* **CV_AA** - antialiased line.
:param shift: Number of fractional bits in the point coordinates.
:param tipLength: The length of the arrow tip in relation to the arrow length
The function ``arrowedLine`` draws an arrow between ``pt1`` and ``pt2`` points in the image. See also :ocv:func:`line`.
LineIterator
------------

4
modules/core/include/opencv2/core/core.hpp
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@@ -2590,6 +2590,10 @@ CV_EXPORTS_AS(randShuffle) void randShuffle_(InputOutputArray dst, double iterFa
CV_EXPORTS_W void line(CV_IN_OUT Mat& img, Point pt1, Point pt2, const Scalar& color,
int thickness=1, int lineType=8, int shift=0);
//! draws an arrow from pt1 to pt2 in the image
CV_EXPORTS_W void arrowedLine(CV_IN_OUT Mat& img, Point pt1, Point pt2, const Scalar& color,
int thickness=1, int line_type=8, int shift=0, double tipLength=0.1);
//! draws the rectangle outline or a solid rectangle with the opposite corners pt1 and pt2 in the image
CV_EXPORTS_W void rectangle(CV_IN_OUT Mat& img, Point pt1, Point pt2,
const Scalar& color, int thickness=1,

19
modules/core/src/drawing.cpp
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@@ -1580,6 +1580,25 @@ void line( Mat& img, Point pt1, Point pt2, const Scalar& color,
ThickLine( img, pt1, pt2, buf, thickness, line_type, 3, shift );
}
void arrowedLine(Mat& 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( Mat& img, Point pt1, Point pt2,
const Scalar& color, int thickness,
int lineType, int shift )