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mapbender
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port to py3 and format with black

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Johannes Schauer Marin Rodrigues 3 years ago
parent dffa71bbdd
commit a4ced15215
Signed by: josch
GPG Key ID: F2CBA5C78FBD83E1
1 changed files with 223 additions and 169 deletions
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mapbender.py
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@ -20,23 +20,35 @@ from math import sqrt
import numpy as np import numpy as np
import matplotlib.pyplot as plt import matplotlib.pyplot as plt
from scipy import interpolate from scipy import interpolate
from itertools import tee, izip from itertools import tee
from matplotlib.patches import Polygon from matplotlib.patches import Polygon
from matplotlib.collections import PatchCollection from matplotlib.collections import PatchCollection
import matplotlib import matplotlib
from PIL import Image from PIL import Image
def y2lat(a): def y2lat(a):
return 180.0/math.pi*(2.0*math.atan(math.exp(a*math.pi/180.0))-math.pi/2.0) return (
180.0
/ math.pi
* (2.0 * math.atan(math.exp(a * math.pi / 180.0)) - math.pi / 2.0)
)
def lat2y(a): def lat2y(a):
return 180.0/math.pi*math.log(math.tan(math.pi/4.0+a*(math.pi/180.0)/2.0)) return (
180.0
/ math.pi
* math.log(math.tan(math.pi / 4.0 + a * (math.pi / 180.0) / 2.0))
)
def pairwise(iterable): def pairwise(iterable):
"s -> (s0,s1), (s1,s2), (s2,s3), ..." "s -> (s0,s1), (s1,s2), (s2,s3), ..."
a, b = tee(iterable, 2) a, b = tee(iterable, 2)
next(b, None) next(b, None)
return izip(a, b) return zip(a, b)
def triplewise(iterable): def triplewise(iterable):
"s -> (s0,s1,s2), (s1,s2,s3), (s2,s3,s4), ..." "s -> (s0,s1,s2), (s1,s2,s3), (s2,s3,s4), ..."
@ -44,15 +56,26 @@ def triplewise(iterable):
next(b, None) next(b, None)
next(c, None) next(c, None)
next(c, None) next(c, None)
return izip(a,b,c) return zip(a, b, c)
# using barycentric coordinates # using barycentric coordinates
def ptInTriangle(p, p0, p1, p2): def ptInTriangle(p, p0, p1, p2):
A = 0.5 * (-p1[1] * p2[0] + p0[1] * (-p1[0] + p2[0]) + p0[0] * (p1[1] - p2[1]) + p1[0] * p2[1]); A = 0.5 * (
sign = -1 if A < 0 else 1; -p1[1] * p2[0]
s = (p0[1] * p2[0] - p0[0] * p2[1] + (p2[1] - p0[1]) * p[0] + (p0[0] - p2[0]) * p[1]) * sign; + p0[1] * (-p1[0] + p2[0])
t = (p0[0] * p1[1] - p0[1] * p1[0] + (p0[1] - p1[1]) * p[0] + (p1[0] - p0[0]) * p[1]) * sign; + p0[0] * (p1[1] - p2[1])
return s >= 0 and t >= 0 and (s + t) <= 2 * A * sign; + p1[0] * p2[1]
)
sign = -1 if A < 0 else 1
s = (
p0[1] * p2[0] - p0[0] * p2[1] + (p2[1] - p0[1]) * p[0] + (p0[0] - p2[0]) * p[1]
) * sign
t = (
p0[0] * p1[1] - p0[1] * p1[0] + (p0[1] - p1[1]) * p[0] + (p1[0] - p0[0]) * p[1]
) * sign
return s >= 0 and t >= 0 and (s + t) <= 2 * A * sign
def getxing(p0, p1, p2, p3): def getxing(p0, p1, p2, p3):
ux = p1[0] - p0[0] ux = p1[0] - p0[0]
@ -70,6 +93,7 @@ def getxing(p0, p1, p2, p3):
else: else:
return None return None
# the line p0-p1 is the upper normal to the path # the line p0-p1 is the upper normal to the path
# the line p2-p3 is the lower normal to the path # the line p2-p3 is the lower normal to the path
# #
@ -88,6 +112,7 @@ def ptInQuadrilateral(p, p0, p1, p2, p3):
else: else:
return ptInTriangle(p, p0, p1, p2) or ptInTriangle(p, p2, p3, p0) return ptInTriangle(p, p0, p1, p2) or ptInTriangle(p, p2, p3, p0)
def get_st(Ax, Ay, Bx, By, Cx, Cy, Dx, Dy, Xx, Xy): def get_st(Ax, Ay, Bx, By, Cx, Cy, Dx, Dy, Xx, Xy):
d = Bx - Ax - Cx + Dx d = Bx - Ax - Cx + Dx
e = By - Ay - Cy + Dy e = By - Ay - Cy + Dy
@ -138,6 +163,7 @@ def get_st(Ax,Ay,Bx,By,Cx,Cy,Dx,Dy,Xx,Xy):
t = [t[0], t[0]] t = [t[0], t[0]]
return s, t return s, t
def main(x, y, width, smoothing, subdiv): def main(x, y, width, smoothing, subdiv):
halfwidth = width / 2.0 halfwidth = width / 2.0
tck, u = interpolate.splprep([x, y], s=smoothing) tck, u = interpolate.splprep([x, y], s=smoothing)
@ -146,7 +172,7 @@ def main(x,y,width,smoothing,subdiv):
heights = [] heights = []
offs = [] offs = []
height = 0.0 height = 0.0
for (ax,ay),(bx,by) in pairwise(zip(*out)): for (ax, ay), (bx, by) in pairwise(list(zip(*out))):
s = ax - bx s = ax - bx
t = ay - by t = ay - by
l = sqrt(s * s + t * t) l = sqrt(s * s + t * t)
@ -164,7 +190,7 @@ def main(x,y,width,smoothing,subdiv):
py = [out[1][0] + cy / cl] py = [out[1][0] + cy / cl]
qx = [out[0][0] + dx / dl] qx = [out[0][0] + dx / dl]
qy = [out[1][0] + dy / dl] qy = [out[1][0] + dy / dl]
for (ubx,uby),(ux,uy),(uax,uay) in triplewise(zip(*out)): for (ubx, uby), (ux, uy), (uax, uay) in triplewise(list(zip(*out))):
# get adjacent line segment vectors # get adjacent line segment vectors
ax = ux - ubx ax = ux - ubx
ay = uy - uby ay = uy - uby
@ -202,7 +228,9 @@ def main(x,y,width,smoothing,subdiv):
qy.append(out[1][-1] + dy / dl) qy.append(out[1][-1] + dy / dl)
quads = [] quads = []
patches = [] patches = []
for (p3x,p3y,p2x,p2y),(p0x,p0y,p1x,p1y) in pairwise(zip(px,py,qx,qy)): for (p3x, p3y, p2x, p2y), (p0x, p0y, p1x, p1y) in pairwise(
list(zip(px, py, qx, qy))
):
quads.append(((p0x, p0y), (p1x, p1y), (p2x, p2y), (p3x, p3y))) quads.append(((p0x, p0y), (p1x, p1y), (p2x, p2y), (p3x, p3y)))
polygon = Polygon(((p0x, p0y), (p1x, p1y), (p2x, p2y), (p3x, p3y)), True) polygon = Polygon(((p0x, p0y), (p1x, p1y), (p2x, p2y), (p3x, p3y)), True)
patches.append(polygon) patches.append(polygon)
@ -215,7 +243,7 @@ def main(x,y,width,smoothing,subdiv):
found.append(i) found.append(i)
if found: if found:
if len(found) > 1: if len(found) > 1:
print "point found in two quads" print("point found in two quads")
return None return None
containingquad.append(found[0]) containingquad.append(found[0])
else: else:
@ -227,7 +255,7 @@ def main(x,y,width,smoothing,subdiv):
if q != None: if q != None:
break break
# find the last missing ones # find the last missing ones
for j,q in izip(xrange(len(containingquad)-1, -1, -1), reversed(containingquad)): for j, q in zip(range(len(containingquad) - 1, -1, -1), reversed(containingquad)):
if q != None: if q != None:
break break
# remove the first and last missing ones # remove the first and last missing ones
@ -237,7 +265,7 @@ def main(x,y,width,smoothing,subdiv):
y = y[i : j + 1] y = y[i : j + 1]
# check if there are any remaining missing ones: # check if there are any remaining missing ones:
if None in containingquad: if None in containingquad:
print "cannot find quad for point" print("cannot find quad for point")
return None return None
for off, h in zip(offs, heights): for off, h in zip(offs, heights):
targetquad = ((0, off + h), (width, off + h), (width, off), (0, off)) targetquad = ((0, off + h), (width, off + h), (width, off), (0, off))
@ -245,8 +273,18 @@ def main(x,y,width,smoothing,subdiv):
tx = [] tx = []
ty = [] ty = []
assert len(containingquad) == len(x) == len(y) assert len(containingquad) == len(x) == len(y)
assert len(out[0]) == len(out[1]) == len(px) == len(py) == len(qx) == len(qy) == len(quads)+1 == len(heights)+1 == len(offs)+1 assert (
for (rx,ry),i in zip(zip(x,y),containingquad): len(out[0])
== len(out[1])
== len(px)
== len(py)
== len(qx)
== len(qy)
== len(quads) + 1
== len(heights) + 1
== len(offs) + 1
)
for (rx, ry), i in zip(list(zip(x, y)), containingquad):
if i == None: if i == None:
continue continue
(ax, ay), (bx, by), (cx, cy), (dx, dy) = quads[i] (ax, ay), (bx, by), (cx, cy), (dx, dy) = quads[i]
@ -310,14 +348,24 @@ def main(x,y,width,smoothing,subdiv):
p1 = int(p1[0]), int(ih - p1[1]) p1 = int(p1[0]), int(ih - p1[1])
p2 = int(p2[0]), int(ih - p2[1]) p2 = int(p2[0]), int(ih - p2[1])
p3 = int(p3[0]), int(ih - p3[1]) p3 = int(p3[0]), int(ih - p3[1])
box=(0,int(ih*(height-off-h)/(bbox[3]-bbox[1])), box = (
int(iw*width/(bbox[2]-bbox[0])),int(ih*(height-off)/(bbox[3]-bbox[1]))) 0,
int(ih * (height - off - h) / (bbox[3] - bbox[1])),
int(iw * width / (bbox[2] - bbox[0])),
int(ih * (height - off) / (bbox[3] - bbox[1])),
)
quad = (p0[0], p0[1], p1[0], p1[1], p2[0], p2[1], p3[0], p3[1]) quad = (p0[0], p0[1], p1[0], p1[1], p2[0], p2[1], p3[0], p3[1])
data.append((box, quad)) data.append((box, quad))
im_out = im.transform((int(iw*width/(bbox[2]-bbox[0])),int(ih*height/(bbox[3]-bbox[1]))),Image.MESH,data,Image.BICUBIC) im_out = im.transform(
(int(iw * width / (bbox[2] - bbox[0])), int(ih * height / (bbox[3] - bbox[1]))),
Image.MESH,
data,
Image.BICUBIC,
)
im_out.save("out.png") im_out.save("out.png")
# np.random.seed(seed=0) # np.random.seed(seed=0)
#colors = 100*np.random.rand(len(patches)/2)+100*np.random.rand(len(patches)/2) # colors = 100*np.random.rand(len(patches)//2)+100*np.random.rand(len(patches)//2)
# p = PatchCollection(patches, cmap=matplotlib.cm.jet, alpha=0.4) # p = PatchCollection(patches, cmap=matplotlib.cm.jet, alpha=0.4)
# p.set_array(np.array(colors)) # p.set_array(np.array(colors))
# plt.figure() # plt.figure()
@ -333,20 +381,26 @@ def main(x,y,width,smoothing,subdiv):
# plt.show() # plt.show()
return True return True
if __name__ == '__main__':
if __name__ == "__main__":
x = [] x = []
y = [] y = []
import sys import sys
if len(sys.argv) != 5: if len(sys.argv) != 5:
print "usage: %s data.csv width smoothing N"%sys.argv[0] print("usage: %s data.csv width smoothing N" % sys.argv[0])
print "" print("")
print " data.csv whitespace delimited lon/lat pairs of points along the path" print(
print " width width of the resulting map in degrees" " data.csv whitespace delimited lon/lat pairs of points along the path"
print " smoothing curve smoothing from 0 (exact fit) to higher values (looser fit)" )
print " N amount of quads to split the path into" print(" width width of the resulting map in degrees")
print "" print(
print " example usage:" " smoothing curve smoothing from 0 (exact fit) to higher values (looser fit)"
print " %s Weser-Radweg-Hauptroute.csv 0.286 6 20"%sys.argv[0] )
print(" N amount of quads to split the path into")
print("")
print(" example usage:")
print(" %s Weser-Radweg-Hauptroute.csv 0.286 6 20" % sys.argv[0])
exit(1) exit(1)
with open(sys.argv[1]) as f: with open(sys.argv[1]) as f:
for l in f: for l in f:

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