class RelativeVector(PathSegment):
def __init__(self, x, y):
self.point = Point(x,y)
def specification(self):
return 'l %s ' % self.point.format()
def scale(self,scale):
self.point= self.point.scale(scale)
return self
def transform(self, point):
p = point
s = sin(radians(-self.angle))
c = cos(radians(-self.angle))
point1 = Point(c * p.x + s * p.y, (c * p.y - s * p.x))
result = point1
return result
def horizontal_line(start,
length,
color='black',
stroke_width=1,
linecap='butt'):
return Line(start,
start + Point(length, 0),
color=color,
stroke_width=stroke_width,
linecap=linecap)
def __init__(self,
width,
height,
stroke_width=1,
stroke='black',
stroke_dasharray=None,
rounded=False,
**attributes):
SimpleItem.__init__(self, Point(0, 0))
self.width = width
self.height = height
self.stroke_width = stroke_width
self.stroke_dasharray = stroke_dasharray
self.stroke = stroke
self.rounded = rounded
self._attributes = attributes
def rotate(self, theta, origin=Point(0, 0)):
self.transformations.append(Rotation(theta, origin))
return self
def move_center_to(self, point):
self.move_to(point - Point(self.radius, self.radius))
return self
def center(self):
return self.top_left + Point(self.radius, self.radius)
def center(self):
return self.top_left + Point(self.width, self.height).scale(0.5)
def set_center(self, x, y):
self.move_to(Point(x - 0.5 * self.width, y - 0.5 * self.height))
return self
def __init__(self, angle, origin=Point(0, 0)):
self.angle = angle
self.origin = origin
def __init__(self, x, y):
self.point = Point(x,y)