1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
|
from __future__ import with_statement
from scipy import pi
from kiva.image import GraphicsContext
def draw_ellipse(gc, x, y, major, minor, angle):
""" Draws an ellipse given major and minor axis lengths. **angle** is
the angle between the major axis and the X axis, in radians.
"""
with gc:
gc.translate_ctm(x, y)
ratio = float(major) / minor
gc.rotate_ctm(angle)
gc.scale_ctm(ratio, 1.0)
gc.arc(0, 0, minor, 0.0, 2 * pi)
gc.stroke_path()
gc.move_to(-minor, 0)
gc.line_to(minor, 0)
gc.move_to(0, -minor)
gc.line_to(0, minor)
gc.stroke_path()
gc = GraphicsContext((300,300))
gc.set_alpha(0.3)
gc.set_stroke_color((1.0,0.0,0.0))
gc.set_fill_color((0.0,1.0,0.0))
gc.rect(95, 95, 10, 10)
gc.fill_path()
draw_ellipse(gc, 100, 100, 35.0, 25.0, pi / 6)
gc.save("ellipse.bmp")
|
