def __init__(self, canvas, id, distance=None, width=None, height=None, **params):
self.__canvas = canvas
self.__id = id
self.__node = canvas.loadSvgNode(id)
# first set distance
print id, self.__node
if distance is not None:
self.__distance = distance
elif width is not None:
Transformation.fromCss(self.__node.get("transform",""))
raise Exception("NYI")
#self.__distance = ...
elif height is not None:
Transformation.fromCss(self.__node.get("transform",""))
raise Exception("NYI")
#self.__distance = ...
else:
raise ValueError("At least one of distance, width or height must be set.")
# find gravity
gx = float(self.__node.get("width"))/2
gy = float(self.__node.get("height"))/2
#gx = 0
#gy = 0
self.__anchor = Transformation.fromData("translate", (gx, gy))
# get transformation data from xml node
x = float(self.__node.get("x",0))
y = float(self.__node.get("y",0))
t1 = Transformation.fromCss(self.__node.get("transform",""))
#t2 = self.__anchor * Transformation.fromData("translate", (x,y)) * t1
t2 = Transformation.fromData("translate", (x,y)) * t1 * self.__anchor
#print "Before:", t2.translationBefore.x, t2.translationBefore.y
#print "After :", t2.translationAfter.x, t2.translationAfter.y
# apply local transformation data
self.x = t2.translationBefore.x
self.y = t2.translationBefore.y
self.rotation = t2.rotation.beta
self.scaleX = t2.scale.sx
self.scaleY = t2.scale.sy
print (self.x, self.y)
def updateNode(self, camera):
s = Transformation.fromData("scale", (self.scaleX, self.scaleY))
#FIXME: WHY THE MINUS HERE?
r = Transformation.fromData("rotate", (self.rotation,))
t = Transformation.fromData("translate", (self.x, self.y))
a = self.__anchor
ia = inv(self.__anchor)
tb = (t * s * r * ia).translationAfter
n = self.__node
n.set('x', str(tb.x))
n.set('y', str(tb.y))
n.set('transform', (s*r).toCss())
