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⚡️ Speed up function _calculate_quad_point_coordinates by 15% #226

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⚡️ Speed up function _calculate_quad_point_coordinates by 15% #226

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28 changes: 19 additions & 9 deletions lib/matplotlib/backends/backend_pdf.py
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Original file line number Diff line number Diff line change
Expand Up @@ -231,15 +231,25 @@ def _calculate_quad_point_coordinates(x, y, width, height, angle=0):
Calculate the coordinates of rectangle when rotated by angle around x, y
"""

angle = math.radians(-angle)
sin_angle = math.sin(angle)
cos_angle = math.cos(angle)
a = x + height * sin_angle
b = y + height * cos_angle
c = x + width * cos_angle + height * sin_angle
d = y - width * sin_angle + height * cos_angle
e = x + width * cos_angle
f = y - width * sin_angle
if angle:
angle = math.radians(-angle)
sin_angle = math.sin(angle)
cos_angle = math.cos(angle)
else:
sin_angle = 0.0
cos_angle = 1.0

height_sin = height * sin_angle
height_cos = height * cos_angle
width_cos = width * cos_angle
width_sin = width * sin_angle

a = x + height_sin
b = y + height_cos
c = x + width_cos + height_sin
d = y - width_sin + height_cos
e = x + width_cos
f = y - width_sin
return ((x, y), (e, f), (c, d), (a, b))


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