uy1 = uy0+uh
user_rect = (ux0,uy0,uw,uh)
#transform = 'rot 10'
transform = 'rot -45'
#transform = 'orig'
pts = [ (0,0),
(5,5),
(30,30),
(45,45),
(1,3),
(6,2),
]
# test the with statement using as
with canv.set_user_coords(device_rect, user_rect,
transform=transform) as canv2:
for pt in pts:
canv2.scatter( [pt[0]], [pt[1]] )
# draw red boundary in user coords
canv2.plot( [ux0,ux0,ux1,ux1,ux0],[uy0,uy1,uy1,uy0,uy0],
color_rgba=(1,0,0,1))
# test the with statement (not using as)
with canv.set_user_coords(device_rect, user_rect,
transform=transform):
for pt in pts:
canv.scatter( [pt[0]], [pt[1]], radius=0.5,
color_rgba=(0.2,0.2,0.6,0.5) )
if 1:
import tempfile
import random
import matplotlib.pyplot as plt
from benu.benu import Canvas
OUTER = 500
#---------
cm = plt.get_cmap('jet')
outer = OUTER
tmp_fname = tempfile.mktemp('.png')
canv = Canvas(tmp_fname, OUTER, OUTER)
while outer > 10:
device_rect = (0,0,outer,outer)
user_rect = (0,0,outer,outer)
with canv.set_user_coords(device_rect, user_rect):
canv.poly([0,0,outer,outer,0],
[0,outer,outer,0,0],
color_rgba=cm(random.randrange(0,cm.N))
)
outer = outer // 2
canv.save()
print tmp_fname
