bbox2points
Convert rectangle to corner points list
Description
Examples
Convert Bounding Box to List of Points and Apply Rotation
Define a bounding box.
bbox = [10,20,50,60];
Convert the bounding box to a list of four points.
points = bbox2points(bbox);
Define a rotation transformation.
theta = 10; tform = affine2d([cosd(theta) -sind(theta) 0; sind(theta) cosd(theta) 0; 0 0 1]);
Apply the rotation.
points2 = transformPointsForward(tform,points);
Close the polygon for display.
points2(end+1,:) = points2(1,:);
Plot the rotated box.
plot(points2(:,1),points2(:,2), '*-');
Input Arguments
rectangle
— Bounding box
4-element vector | 5-element vector | M-by-4 matrix | M-by-5 matrix
Bounding box, specified as a 4-element vector, 5-element vector, M-by-4 matrix, or M-by-5 matrix.
Bounding Box | Example |
---|---|
For one or more rectangles, specify one of:
| |
Data Types: single
| double
| int16
| int32
| uint16
| uint32
Output Arguments
points
— Rectangle corner coordinates
4-by-2 matrix | 4-by-2-by-M array
Rectangle corner coordinates, returned as a 4-by-2 matrix of [x,y] coordinates, or a 4-by-2-by-M array of [x,y] coordinates. The output points for the rectangle are listed counterclockwise starting from the upper-left corner.
For a single input bounding box, the function returns the 4-by-2 matrix.
For multiple input bounding boxes, the function returns the 4-by-2-M array for M bounding boxes.
Data Types: single
| double
| int16
| int32
| uint16
| uint32
Extended Capabilities
C/C++ Code Generation
Generate C and C++ code using MATLAB® Coder™.
Version History
Introduced in R2014b
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