def _write_boat_area(pier, stg_manager, coords_transform: co.Transformation):
if len(pier.nodes) < 3:
return
# Guess a possible position for realistic boat placement
linear_ring = shg.LinearRing(pier.nodes)
centroid = linear_ring.centroid
# Simplify
ring = linear_ring.convex_hull.buffer(
40, cap_style=CAP_STYLE.square,
join_style=JOIN_STYLE.bevel).simplify(20)
for p in ring.exterior.coords:
line_coords = [[centroid.x, centroid.y], p]
target_vector = shg.LineString(line_coords)
coords = linear_ring.coords
for i in range(len(coords) - 1):
segment = LineString(coords[i:i + 2])
if segment.length > 20 and segment.intersects(target_vector):
direction = math.degrees(
math.atan2(segment.coords[0][0] - segment.coords[1][0],
segment.coords[0][1] - segment.coords[1][1]))
parallel = segment.parallel_offset(10, 'right')
boat_position = parallel.interpolate(segment.length / 2)
try:
pos_global = coords_transform.to_global(
(boat_position.x, boat_position.y))
_write_model(segment.length, stg_manager, pos_global,
direction, pier.elevation)
except AttributeError as reason:
logging.error(reason)
def shift_points(points,
distance=1,
side='left',
resolution=16,
join_style=3,
mitre_limit=5.0):
"""Takes array of points, create linestring, shift the linestring and return shifted"""
line = LineString(points)
shift_line = line.parallel_offset(distance, side)
print('shift_line=\n', shift_line)
return shift_line
def _write_boat_line(pier, stg_manager, coords_transform: co.Transformation):
line_string = LineString(pier.nodes)
right_line = line_string.parallel_offset(4,
'left',
resolution=8,
join_style=1,
mitre_limit=10.0)
if isinstance(right_line, LineString): # FIXME: what to do else?
coords = right_line.coords
for i in range(len(coords) - 1):
segment = LineString(coords[i:i + 2])
boat_position = segment.interpolate(segment.length / 2)
try:
pos_global = coords_transform.to_global(
(boat_position.x, boat_position.y))
direction = math.degrees(
math.atan2(segment.coords[0][0] - segment.coords[1][0],
segment.coords[0][1] - segment.coords[1][1]))
if segment.length > 5:
_write_model(segment.length, stg_manager, pos_global,
direction, pier.elevation)
except AttributeError as reason:
logging.error(reason)
