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#!/usr/bin/python
import py2geom
import toyframework
import random,gtk
from py2geom_glue import *
class PathToy(toyframework.Toy):
def __init__(self):
toyframework.Toy.__init__(self)
self.handles.append(toyframework.PointHandle(200, 200))
self.path_b_name="star.svgd"
self.pv = py2geom.read_svgd(self.path_b_name);
centr = py2geom.Point()
for p in self.pv:
c,area = py2geom.centroid(p.toPwSb())
centr += c
self.pv = self.pv*py2geom.Matrix(py2geom.Translate(-centr))
def draw(self, cr, pos, save):
cr.set_source_rgba (0., 0., 0., 1)
cr.set_line_width (1)
B = (self.pv[0]*py2geom.Matrix(py2geom.Translate(*self.handles[0].pos))).toPwSb();
n = py2geom.rot90(py2geom.unit_vector(py2geom.derivative(B), 0.01, 3));
al = py2geom.arcLengthSb(B, 0.1);
offset = 10.
offset_curve = B+py2geom.sin(al*0.1, 0.01, 2)*n*10.
offset_path = py2geom.path_from_piecewise(offset_curve, 0.1, True)
py2geom.cairo_path(cr, offset_path)
cr.stroke()
self.notify = ''
toyframework.Toy.draw(self, cr, pos, save)
t = PathToy()
import sys
toyframework.init(sys.argv, t, 500, 500)
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