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SVG transforms hopefully finally handled properly

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mirefek
2018-02-12 22:35:51 +01:00
parent ebc53e3948
commit bc83c8a4f3
1 changed files with 30 additions and 9 deletions
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39
mobject/svg_mobject.py
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@ -159,31 +159,52 @@ class SVGMobject(VMobject):
x = float(element.getAttribute('x')) x = float(element.getAttribute('x'))
#Flip y #Flip y
y = -float(element.getAttribute('y')) y = -float(element.getAttribute('y'))
mobject.shift(x*RIGHT+y*UP)
except: except:
pass pass
try: transform = element.getAttribute('transform')
transform = element.getAttribute('transform')
try: # transform matrix
prefix = "matrix(" prefix = "matrix("
suffix = ")" suffix = ")"
if not transform.startswith(prefix) or not transform.endswith(suffix): raise Exception() if not transform.startswith(prefix) or not transform.endswith(suffix): raise Exception()
transform = transform[len(prefix):-len(suffix)] transform = transform[len(prefix):-len(suffix)]
transform = string_to_numbers(transform) transform = string_to_numbers(transform)
transform = np.array(transform).reshape([3,2]) transform = np.array(transform).reshape([3,2])
x += transform[2][0] x = transform[2][0]
y -= transform[2][1] y = -transform[2][1]
matrix = np.identity(self.dim) matrix = np.identity(self.dim)
matrix[:2,:2] = transform[:2,:] matrix[:2,:2] = transform[:2,:]
t_matrix = np.transpose(matrix) matrix[1] *= -1
matrix[:,1] *= -1
for mob in mobject.family_members_with_points(): for mob in mobject.family_members_with_points():
mob.points = np.dot(mob.points, t_matrix) mob.points = np.dot(mob.points, matrix)
mobject.shift(x*RIGHT+y*UP)
except: except:
pass pass
mobject.shift(x*RIGHT+y*UP) try: # transform scale
#TODO, transforms prefix = "scale("
suffix = ")"
if not transform.startswith(prefix) or not transform.endswith(suffix): raise Exception()
transform = transform[len(prefix):-len(suffix)]
scale_x, scale_y = string_to_numbers(transform)
mobject.scale(np.array([scale_x, scale_y, 1]))
except:
pass
try: # transform translate
prefix = "translate("
suffix = ")"
if not transform.startswith(prefix) or not transform.endswith(suffix): raise Exception()
transform = transform[len(prefix):-len(suffix)]
x, y = string_to_numbers(transform)
mobject.shift(x*RIGHT + y*DOWN)
except:
pass
#TODO, ...
def update_ref_to_element(self, defs): def update_ref_to_element(self, defs):
new_refs = dict([ new_refs = dict([