def get_bounding_box(arg):
'''Returns the pair of coordinate pairs outlining the bounding box of
the given HPGL drawing.'''
if not isinstance(arg, (list, tuple)):
raise TypeError('arg must be list or tuple')
min_x = min_y = 1000000.0
max_x = max_y = -1000000.0
coords = get_all_coordinates(arg)
if len(coords) == 0:
return None
for c in coords:
## x...
if c.x > max_x:
max_x = c.x
if c.x < min_x:
min_x = c.x
## y...
if c.y > max_y:
max_y = c.y
if c.y < min_y:
min_y = c.y
return (Coordinate(min_x, min_y), Coordinate(max_x, max_y))
def get_centroid(arg):
'''Returns the centroid of the given Chiplotle-HPGL shapes.'''
arg = get_all_coordinates(arg)
## convert into a set to remove duplicate coordinates and to
## avoid giving more weight to these duplicate points...
arg = set(arg)
result = Coordinate(0, 0)
for c in arg:
result += c
return result / len(arg)
def pupd_to_paths(hpgl):
# slurp in PUs and PDs, and convert to a group of simple paths
# probably fragile, but works fine on the output of pstoedit -f hpgl
results = Group()
builder = []
for command in hpgl:
if isinstance(command, PU):
if builder:
# must be starting a new path, so stash the last
coords = get_all_coordinates(builder)
results.append(Path(coords))
builder = []
builder.append(command)
elif isinstance(command, PD):
builder.append(command)
return results
