how to rotate the rectangle in matplotlib patch?

Question

I am drawing rotated rectangle using matplotlib but I don't know how to adjust the angle?

rect = patches.Rectangle((int(arr[2])-0.5*int(arr[4]),int(arr[3])-0.5*int(arr[5])), int(arr[4]),int(arr[5]),
                        fill=False,
                        edgecolor='g', linewidth=1)
t = matplotlib.transforms.Affine2D().rotate_around(float(arr[2]), float(arr[3]),\
                float(arr[6])*180/np.pi)

rect.set_transform(t + plt.gca().transData)

plt.gca().add_patch(rect)

1 10 3308 261 21 10 -88.363423
this is the data of one car

but the rectangel don't fit it.

description

Answer 1

It seems the angle of rotation should be -88 degrees.

Negative angles will rotate clockwise. .rotate_around expects it's anglular argument to be in radiants.

You're using float(arr[6])*180/np.pi , which would convert radiants to degrees, but makes little sense as you already have the angle in degrees.

Instead use

float(arr[6])*np.pi/180.

or

np.deg2rad(float(arr[6]))