def add_origin(ax, geom, origin):
x, y = xy = affinity.interpret_origin(geom, origin, 2)
ax.plot(x, y, 'o', color=GRAY, zorder=1)
ax.annotate(str(xy),
xy=xy,
ha='center',
textcoords='offset points',
xytext=(0, 8))
def add_origin(ax, geom, origin):
x, y = xy = affinity.interpret_origin(geom, origin, 2)
ax.plot(x, y, 'o', color=GRAY, zorder=1)
ax.annotate(str(xy), xy=xy, ha='center',
textcoords='offset points', xytext=(0, 8))
def _get_transform_matrix(
shape: BaseGeometry,
params: _TargetTransformParams) -> TransformMatrix:
"""
previous optimization is toggled with a given geometry, this function will release this toggle
:param shape: a shape which the transformation toggled with
:param params: params that toggle with the shape
:return: transformMatrix elements
"""
translated = translate(shape,
xoff=params.x_offset,
yoff=params.y_offset)
scaled = scale(translated, xfact=params.scale, yfact=params.scale)
scale_origin = interpret_origin(translated, "center", 2)
rotate_origin = interpret_origin(scaled, "center", 2)
p00 = Point(0, 0)
p10 = Point(1, 0)
p01 = Point(0, 1)
p00_translated = translate(p00,
xoff=params.x_offset,
yoff=params.y_offset)
p00_scaled = scale(p00_translated,
xfact=params.scale,
yfact=params.scale,
origin=scale_origin)
p00_rotated = rotate(p00_scaled,
angle=params.angle,
origin=rotate_origin) # type: Point
p01_translated = translate(p01,
xoff=params.x_offset,
yoff=params.y_offset)
p01_scaled = scale(p01_translated,
xfact=params.scale,
yfact=params.scale,
origin=scale_origin)
p01_rotated = rotate(p01_scaled,
angle=params.angle,
origin=rotate_origin) # type: Point
p10_translated = translate(p10,
xoff=params.x_offset,
yoff=params.y_offset)
p10_scaled = scale(p10_translated,
xfact=params.scale,
yfact=params.scale,
origin=scale_origin)
p10_rotated = rotate(p10_scaled,
angle=params.angle,
origin=rotate_origin) # type: Point
c = p00_rotated.x
f = p00_rotated.y
a = p10_rotated.x - c
d = p10_rotated.y - f
b = p01_rotated.x - c
e = p01_rotated.y - f
return TransformMatrix(a, b, d, e, c, f)