def transform(self, trans):
trans = svg.canonical_transformation(trans)
oldx, oldy = self.x, self.y
self.x, self.y = trans(self.x, self.y)
if self.rotate:
shiftx, shifty = trans(oldx + epsilon, oldy)
angle = math.atan2(shifty, shiftx)
trans = eval(
"lambda x, y: (%(newx)s + cos(%(angle)s)*(x - %(oldx)s) - sin(%(angle)s)*(y - %(oldy)s), %(newy)s + sin(%(angle)s)*(x - %(oldx)s) + cos(%(angle)s)*(y - %(oldy)s))"
% {
"newx": repr(self.x),
"newy": repr(self.y),
"oldx": repr(oldx),
"oldy": repr(oldy),
"angle": repr(angle)
}, math.__dict__)
else:
trans = eval(
"lambda x, y: (x + %(newx)s - %(oldx)s, y + %(newy)s - %(oldy)s)"
% {
"newx": repr(self.x),
"newy": repr(self.y),
"oldx": repr(oldx),
"oldy": repr(oldy)
})
for child in self.children:
if isinstance(child, svg.SVG):
child.transform(trans)
def transformation_jacobian(expr, x, y, scale=1.):
func = svg.canonical_transformation(expr)
eps = epsilon
if scale != 0.:
eps *= scale
X0, Y0 = func(x, y)
xhatx, xhaty = func(x + eps, y)
yhatx, yhaty = func(x, y + eps)
return (1.*(xhatx - X0)/eps, 1.*(xhaty - Y0)/eps), (1.*(yhatx - X0)/eps, 1.*(yhaty - Y0)/eps)
def transformation_angle(expr, x, y, scale=1.):
func = svg.canonical_transformation(expr)
eps = epsilon
if scale != 0.:
eps *= scale
xprime, yprime = func(x + eps, y)
x, y = func(x, y)
delx, dely = xprime - x, yprime - y
return math.atan2(dely, delx)
def transform(trans, obj):
if isinstance(trans, basestring):
trans = svg.canonical_transformation(trans)
obj = copy.deepcopy(obj)
if callable(trans):
obj.transform(trans)
else:
for t in trans:
obj.transform(t)
return obj
def transformation_angle(expr, x, y, scale=1.):
func = svg.canonical_transformation(expr)
eps = epsilon
if scale != 0.:
eps *= scale
xprime, yprime = func(x + eps, y)
x, y = func(x, y)
delx, dely = xprime - x, yprime - y
return math.atan2(dely, delx)
def transform(trans, obj):
if isinstance(trans, basestring):
trans = svg.canonical_transformation(trans)
obj = copy.deepcopy(obj)
if callable(trans):
obj.transform(trans)
else:
for t in trans:
obj.transform(t)
return obj
def transformation_jacobian(expr, x, y, scale=1.):
func = svg.canonical_transformation(expr)
eps = epsilon
if scale != 0.:
eps *= scale
X0, Y0 = func(x, y)
xhatx, xhaty = func(x + eps, y)
yhatx, yhaty = func(x, y + eps)
return (1. * (xhatx - X0) / eps,
1. * (xhaty - Y0) / eps), (1. * (yhatx - X0) / eps,
1. * (yhaty - Y0) / eps)
def transform(self, trans):
trans = svg.canonical_transformation(trans)
oldx, oldy = self.x, self.y
self.x, self.y = trans(self.x, self.y)
if self.rotate:
shiftx, shifty = trans(oldx + epsilon, oldy)
angle = math.atan2(shifty, shiftx)
trans = eval("lambda x, y: (%(newx)s + cos(%(angle)s)*(x - %(oldx)s) - sin(%(angle)s)*(y - %(oldy)s), %(newy)s + sin(%(angle)s)*(x - %(oldx)s) + cos(%(angle)s)*(y - %(oldy)s))" % {"newx": repr(self.x), "newy": repr(self.y), "oldx": repr(oldx), "oldy": repr(oldy), "angle": repr(angle)}, math.__dict__)
else:
trans = eval("lambda x, y: (x + %(newx)s - %(oldx)s, y + %(newy)s - %(oldy)s)" %
{"newx": repr(self.x), "newy": repr(self.y), "oldx": repr(oldx), "oldy": repr(oldy)})
for child in self.children:
if isinstance(child, svg.SVG):
child.transform(trans)
def transform(self, t):
self.trans.append(svg.canonical_transformation(t))
def transform(self, t):
t = svg.canonical_transformation(t)
x1, y1 = t(self.x, self.y)
x2, y2 = t(self.x + self.width, self.y + self.height)
self.x, self.y = x1, y1
self.width, self.height = x2 - x1, y2 - y1
def transform(self, t):
self.trans.append(svg.canonical_transformation(t))
def transform(self, t):
t = svg.canonical_transformation(t)
x1, y1 = t(self.x, self.y)
x2, y2 = t(self.x + self.width, self.y + self.height)
self.x, self.y = x1, y1
self.width, self.height = x2 - x1, y2 - y1
