move first semester to first semester

I/Karto/assignment4/draw.py

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+#!/usr/bin/env python3
+from math import atan, pi
+import numpy as np
+import matplotlib.pyplot as plt
+
+from collections import namedtuple
+from shapely.geometry import LineString, asPolygon, Point as sPoint, asLineString
+from descartes import PolygonPatch
+
+from measure import *
+
+# nubraižytos kelio linijos ir jų nubrėžti offset'ai iš dešinės į kairę.
+kelias_l = namedtuple('kelias_l', ['line', 'offsets'])
+
+N, E, S, W = (0,10), (10,0), (0,-10), (-10,0)
+point_annotations = {
+         1: S,  2: E,  3: N,  4: W,
+         5: N,  6: S,  7: S,  8: N,
+         9: E, 10: N, 11: S, 12: N,
+        13: S, 14: W, 15: N, 16: N,
+        17: N, 18: E, 19: N, 20: S,
+        21: N, 22: S, 23: E, 24: N,
+}
+road_annotations = {'A-08':W, 'A-05':N, 'A-03':N, 'G-11':E}
+
+# implementacija
+fig, ax = plt.subplots()
+ax.set_aspect('equal')
+plt.grid(True)
+
+# taškų anotacijos
+for v in vertices:
+    ax.annotate(v.point, xy=v.xy, zorder=KAT0, textcoords='offset points',
+            fontsize='small', xytext=point_annotations[v.point])
+
+keliai_l = {}
+# kelių piešimas
+for id, kelias in keliai.items():
+    # ašis
+    kelias_line = LineString([Points[i].xy for i in kelias.virsunes])
+    ax.plot(*kelias_line.xy, linewidth=2, dashes=kelias.dashes, color=kelias.spalva, zorder=kelias.kat)
+    # offset'ai
+    offset_multiplier = kelias.plotis/(kelias.juostos[0].plotis + kelias.juostos[-1].plotis)
+    offset_lines = []
+    for offset in kelias.juostos:
+        l = kelias_line.parallel_offset(offset.plotis*offset_multiplier, offset.kryptis, join_style=2)
+        offset_lines.append(l)
+        ax.plot(*l.xy, linewidth=.5, dashes=offset.dashes, color=offset.spalva, zorder=kelias.kat)
+    # kelio poligonas su plotu
+    kelias_poly = np.vstack((offset_lines[0].coords, offset_lines[-1].coords))
+    ax.add_patch(PolygonPatch(asPolygon(kelias_poly), fc='white', zorder=kelias.kat, linewidth=0))
+    keliai_l[id] = kelias_l(line=kelias_line, offsets=offset_lines)
+
+# kelių anotacijos
+for id, kelias in keliai_l.items():
+    linestart, lineend = np.array(kelias.offsets[-1].coords)[0:2]
+    delta = lineend - linestart
+    angle = atan(delta[1]/delta[0])*180/pi
+    offset = road_annotations[id]
+    ax.annotate(id, kelias.offsets[-1].coords[0], zorder=KAT0, textcoords='offset points',
+            fontsize='small', xytext=offset, rotation=angle)
+
+# septynkampis
+prev_dirang = float(K1)*pi/180
+step = 5/7*pi
+heptagon = [np.array(Points[6].xy)]
+for i in range(1, 7):
+    dxy = np.array([float(D1)*cos(prev_dirang), float(D1)*sin(prev_dirang)])
+    heptagon.append(heptagon[i-1] + dxy)
+    prev_dirang += pi - step
+ax.add_patch(PolygonPatch(asPolygon(heptagon), linewidth=2, fc='xkcd:white', ec='xkcd:magenta'))
+
+# septynkampio centras
+x0, y0 = Points[6].xy
+x = x0 + float(D1)/(2*sin(pi/7))*sin(pi/7-float(K1)*pi/180)
+y = y0 + float(D1)/(2*sin(pi/7))*cos(pi/7-float(K1)*pi/180)
+center = sPoint(x, y)
+
+# užlieta erdvė apskritimas
+radius = float(D1)/2/sin(pi/7)-float(A1)
+angles = np.linspace(0, 2*pi, num=360)
+circle_y = y + np.sin(angles) * radius
+circle_x = x + np.cos(angles) * radius
+ax.plot(circle_x, circle_y)
+
+if __name__ == '__main__':
+    plt.show()