59 lines
2.0 KiB
Python
59 lines
2.0 KiB
Python
|
#! /usr/bin/env python3
|
||
|
|
'''
|
||
|
|
Copyright (C) 2019 Grant Patterson <grant@revoltlabs.co>
|
||
|
|
|
||
|
|
This program is free software; you can redistribute it and/or modify
|
||
|
|
it under the terms of the GNU General Public License as published by
|
||
|
|
the Free Software Foundation; either version 2 of the License, or
|
||
|
|
(at your option) any later version.
|
||
|
|
|
||
|
|
This program is distributed in the hope that it will be useful,
|
||
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
|
|
GNU General Public License for more details.
|
||
|
|
|
||
|
|
You should have received a copy of the GNU General Public License
|
||
|
|
along with this program; if not, write to the Free Software
|
||
|
|
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||
|
|
'''
|
||
|
|
|
||
|
|
from math import copysign, cos, pi, sin
|
||
|
|
from inkex import Transform
|
||
|
|
|
||
|
|
STEPS = 360
|
||
|
|
|
||
|
|
def rotate_matrix(node, a):
|
||
|
|
bbox = node.bounding_box()
|
||
|
|
cx = bbox.center_x / 2.0
|
||
|
|
cy = bbox.center_y / 2.0
|
||
|
|
return Transform([[cos(a), -sin(a), cx], [sin(a), cos(a), cy]]) * Transform([[1, 0, -cx], [0, 1, -cy]])
|
||
|
|
|
||
|
|
def optimal_rotations(node):
|
||
|
|
step = pi / float(STEPS)
|
||
|
|
bbox = node.bounding_box()
|
||
|
|
min_width = bbox.right - bbox.left
|
||
|
|
min_width_angle = None
|
||
|
|
min_bbox_area = min_width * (bbox.bottom - bbox.top)
|
||
|
|
min_bbox_area_angle = None
|
||
|
|
|
||
|
|
for i in range(STEPS):
|
||
|
|
angle = -pi/2.0 + i*step
|
||
|
|
rotated = node.bounding_box(rotate_matrix(node, angle))
|
||
|
|
|
||
|
|
width = rotated.width
|
||
|
|
height = rotated.height
|
||
|
|
bbox_area = width * height
|
||
|
|
|
||
|
|
if width < min_width:
|
||
|
|
min_width = width
|
||
|
|
min_width_angle = angle
|
||
|
|
if bbox_area < min_bbox_area:
|
||
|
|
if width > height:
|
||
|
|
# To keep results similar to min_width_angle, rotate by an
|
||
|
|
# additional 90 degrees which doesn't affect bbox area.
|
||
|
|
angle -= copysign(pi/2.0, angle)
|
||
|
|
|
||
|
|
min_bbox_area = bbox_area
|
||
|
|
min_bbox_area_angle = angle
|
||
|
|
|
||
|
|
return min_width_angle, min_bbox_area_angle
|