How to rotate rectangular with a an angle?

Hey Everone,

I would like to rotate a rectangula with a specific angle.

rectangle('Position',[70 130 25 30]);

Any help

Thank you

Answer 1

[Les Beckham]

Perhaps this is what you are trying to do. The hgtransform and makehgtransform functions are designed for transforming graphics (rotation, scaling, translation).

r = rectangle('Position',[70 130 25 30]);
axis equal
grid on
h = hgtransform;
set(r, 'parent', h)
phi = 25 * pi/180; % angle of rotation
R = makehgtform('zrotate', phi);
h.Matrix = R;

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Answer 2

[Adam Danz]

MATLAB's polyshape has a rotate function that makes this fairly easy. Instead of the [left, bottom, width, height] input used in rectangle, polyshape input is the coordinates of the vertices.

lbwh = [70 130 25 30];  % rectangle position [left, bottom, width, height]
deg = 45; % degrees

x = [lbwh(1), sum(lbwh([1,3]))];  % x vertices 
y = [lbwh(2), sum(lbwh([2,4]))];  % y vertices

rect = polyshape(x([1 2 2 1]), y([1 1 2 2])); % rectangle 

You can rotate it around (0,0) or around any coordinate. Here are two examples.

rectRot1 = rotate(rect, deg); % rotates with respect to (0,0)

[xCnt, yCnt] = centroid(rect); % center point
rectRot2 = rotate(rect, deg, [xCnt, yCnt]);  % rotates about the centerpoint

Plot results

plot([rect, rectRot2],'FaceColor','none')

[Riyadh]

Thank you!