class UnsortedPriorityQueue(PriorityQueueBase):
def _find_min(self):
if self.is_empty():
raise Empty('Priority queue is empty')
small = self._data.first()
walk = self._data.after(small)
while walk is not None:
if walk.element() < small.element():
small = walk
walk = self._data.after(walk)
return small
def __init__(self):
self._data = PositionalList()
def __len__(self):
return len(self._data)
def add(self, key, value):
self._data.add_last(self._Item(key, value))
def min(self):
p = self._find_min()
item = p.element()
return(item._key, item._value)
def remove_min(self):
p = self._find_min()
item = self._data.delete(p)
return (item._key, item._value)
def list_to_positional_list(L):
pos_list = PositionalList()
for i in L:
pos_list.add_last(i)
return pos_list
def list_to_positional_list(list_):
new_pos_list = PositionalList()
for element in list_:
new_pos_list.add_last(element)
return new_pos_list
class UnsortedPriorityQueue(PriorityQueueBase):
""" a min-oriented priority queue implemented with an unsorted list """
def __init__(self):
""" Create a new empty Priority Queue """
self._data = PositionalList()
def _find_min(self): # nonpublic utility
""" Return Position of item with min key """
if self.is_empty(): # method inherited from base class
raise Exception('Priority queue is empty')
small = self._data.first()
walk = self._data.after(small)
def __len__(self):
""" Return the number of items in the priority queue. """
return len(self._data)
def add(self, key, value):
""" add a key-value pair. """
self._data.add_last(self._Item(key, value))
def min(self):
""" Return but do not remove (k,v) tuple with min key. """
p = self._find_min()
item = p.element()
return (item._key, item._value)
def remove_min(self):
""" Remove and return (k,v) tuple with min key. """
p = self._find_min()
item = self._data.delete(p)
return (item._key, item._value)
class SortedPriorityQueue(PriorityQueueBase):
def __init__(self):
self._data = PositionalList()
def __len__(self):
return len(self._data)
def add(self, key, value):
newest = self._Item(key, value)
walk = self._data.last()
while walk is not None and newest < walk.element():
walk = self._data.before(walk)
if walk is None:
self._data.add_first(newest)
else:
self._data.add_after(walk, newest)
def min(self):
if self.is_empty():
raise Empty('Priority queue is empty')
p = self._data.first()
item = p.element()
return (item._key, item._value)
def remove_min(self):
if self.is_empty():
raise Empty('Priority queue is empty')
item = self._data.delete(self._data.first())
return (item._key, item._value)
class SortedPriorityQueue(PriorityQueueBase):
def __init__(self):
self._data = PositionalList()
def __len__(self):
return len(self._data)
def add(self, key, value):
new = self._Item(key, value)
walk = self._data.last()
while walk is not None and new < walk.element():
walk = self._data.before(walk)
if walk is None:
self._data.add_first(new)
else:
self._data.add_before(walk, new)
def min(self):
if self.is_empty():
raise Empty('Priority queue is empty.')
p = self._data.first()
item = p.element()
return item._key, item._value
def remove_min(self):
if self.is_empty():
raise Empty('Priority queue is empty.')
item = self._data.delete(self._data.first())
return item._key, item._value
class SortedPriorityQueue(PriorityQueueBase): # base class defines _Item
""" A min-oriented priority queue implemented with a sorted list. """
def __init__(self):
""" Create a new empty Priority Queue. """
self._data = PositionalList()
def __len__(self):
""" Return the num of items in the priority queue. """
return len(self._data)
def add(self, key, value):
""" Add a key-value pair. """
newest = self._Item(key, value) # make new item instance
walk = self._data.last() # walk backward looking for smaller key
while walk is not None and newest < walk.element():
walk = self._data.before(walk)
if walk is None:
self._data.add_first(newest) # new key is smallest
else:
self._data.add_after(walk, newest) # newest goes after walk
def min(self):
""" Return but do not remove (k,v) tuple with min key """
if self.is_empty():
raise Exception('Priority queue is empty.')
p = self._data.first()
item = p.element()
return (item._key, item._value)
def remove_min(self):
""" Remove and return (k,v) tuple with min key. """
if self.is_empty():
raise Exception('Priority queue is empty.')
item = self._data.delete(self._data.first())
return (item._key, item._value)
class SortedPriorityQueue(PriorityQueueBase):
"""
A priority queue class storing elements sorted according to priority
"""
def __init__(self):
self._data = PositionalList()
def __len__(self):
return len(self._data)
def min(self):
if self.is_empty():
raise EmptyException('Priority queue is empty.')
p = self._data.first()
return (p.element()._key, p.element()._value)
def remove_min(self):
if self.is_empty():
raise EmptyException('Priority queue is empty.')
p = self._data.first()
item = self._data.delete(p)
return (item._key, item._value)
def add(self, k, v):
newest = self._Item(k, v)
walk = self._data.last()
while walk is not None and newest < walk.element():
walk = self._data.before(walk)
if walk is None:
self._data.add_first(newest)
else:
self._data.add_after(walk, newest)
class FavoritesList:
class _Item:
__slots__ = '_value', '_count'
def __init__(self, e):
self._value = e
self._count = 0
def _find_position(self, e):
walk = self._data.first()
while walk is not None and walk.element()._value != e:
walk = self._data.after(walk)
return walk
def _move_up(self, p):
if p != self._data.first():
cnt = p.element()._count
walk = self._data.before(p)
if cnt > walk.element()._count:
while walk != self._data.first() and cnt > self._data.before(
walk).element()._count:
walk = self._data.before(walk)
self._data.add_before(walk, self._data.delete(p))
def __init__(self):
self._data = PositionalList()
def __len__(self):
return len(self._data)
def is_empty(self):
return len(self._data) == 0
def access(self, e):
p = self._find_position(e)
if p is None:
p = self._data.add_last(self._Item(e))
p.element()._count += 1
self._move_up(p)
def remove(self, e):
p = self._find_position(e)
if p is not None:
self._data.delete(p)
def top(self, k):
if not 1 <= k <= len(self):
raise ValueError('Illegal value for k')
walk = self._data.first()
for j in range(k):
item = walk.element()
yield item._value
walk = self._data.after(walk)
class UnsortedPriorityQueue(PriorityQueueBase): # base class defines _Item
"""A min-oriented priority queue implemented with an unsorted list."""
#----------------------------- nonpublic behavior -----------------------------
def _find_min(self):
"""Return Position of item with minimum key."""
if self.is_empty(): # is_empty inherited from base class
raise Exception('Priority queue is empty')
small = self._data.first()
walk = self._data.after(small)
while walk is not None:
if walk.element() < small.element():
small = walk
walk = self._data.after(walk)
return small
#------------------------------ public behaviors ------------------------------
def __init__(self):
"""Create a new empty Priority Queue."""
self._data = PositionalList()
def __len__(self):
"""Return the number of items in the priority queue."""
return len(self._data)
def add(self, key, value):
"""Add a key-value pair."""
self._data.add_last(self._Item(key, value))
def min(self):
"""Return but do not remove (k,v) tuple with minimum key.
Raise Empty exception if empty.
"""
p = self._find_min()
item = p.element()
return (item._key, item._value)
def remove_min(self):
"""Remove and return (k,v) tuple with minimum key.
Raise Empty exception if empty.
"""
p = self._find_min()
item = self._data.delete(p)
return (item._key, item._value)
def __iter__(self):
"""Generate iteration of the map's keys."""
for item in self._data:
yield item # yield the KEY
class sortedPriorityQueue(PriorityQueueBase): # base class defines _Item
"""A min-oriented priority queue implemented with an unsorted list."""
#----------------------------- nonpublic behavior -----------------------------
#------------------------------ public behaviors ------------------------------
def __init__(self):
"""Create a new empty Priority Queue."""
self._data = PositionalList()
def __len__(self):
"""Return the number of items in the priority queue."""
return len(self._data)
def add(self, key, value):
"""Add a key-value pair."""
newest = self._Item(key, value)
walk = self._data.last()
while walk is not None and newest < walk.element():
walk = self._data.before(walk)
if walk is None:
self._data.add_first(newest)
else:
self._data.add_after(walk, newest)
def min(self):
"""Return but do not remove (k,v) tuple with minimum key.
Raise Empty exception if empty.
"""
if self.is_empty():
raise Exception("Priority queue is empty")
p = self._data.first()
item = p.element()
return (item._key, item._value)
def remove_min(self):
"""Remove and return (k,v) tuple with minimum key.
Raise Empty exception if empty.
"""
if self.is_empty():
raise Exception("Priority Queue is empty.")
item = self._data.delete(self._data.first())
return (item._key)
def __iter__(self):
"""Generate iteration of the map's keys."""
for item in self._data:
yield item # yield the KEY
def insertionSort(self, A):
for i in A:
self.add(i, i)
for i in range(len(A)):
A[i] = self.remove_min()
def __init__(self):
self.__verts = list()
self.__faces = PositionalList()
self.__polygon_types = list(
) # RP: shape of polygon or the name of n-gon
self.__numberOfVertices = 0 # RP: total number of vertices
self.__totalPolygons = 0 # RP: total number of faces
self.__polygons = dict(
) # RP: count of each type of faces, 3 squares, 5 pentagons etc
self.__x_minimum = 0 # RP: minimum of x co-ordinates
self.__y_minimum = 0 # RP: minimum of y co-ordinates
self.__z_minimum = 0 # RP: minimum of z co-ordinates
self.__x_maximum = 0 # RP: maximim of x co-ordinates
self.__y_maximum = 0 # RP: maximim of y co-ordinates
self.__z_maximum = 0 # RP: maximim of z co-ordinates
class UnsortedPriorityQueue(PriorityQueueBase): # base class defines _Item
"""A min-oriented priority queue implemented with an unsorted list."""
#----------------------------- nonpublic behavior -----------------------------
def _find_min(self):
"""Return Position of item with minimum key."""
if self.is_empty(): # is_empty inherited from base class
raise Empty('Priority queue is empty')
small = self._data.first()
walk = self._data.after(small)
while walk is not None:
if walk.element() < small.element():
small = walk
walk = self._data.after(walk)
return small
#------------------------------ public behaviors ------------------------------
def __init__(self):
"""Create a new empty Priority Queue."""
self._data = PositionalList()
def __len__(self):
"""Return the number of items in the priority queue."""
return len(self._data)
def add(self, key, value):
"""Add a key-value pair."""
self._data.add_last(self._Item(key, value))
def min(self):
"""Return but do not remove (k,v) tuple with minimum key.
Raise Empty exception if empty.
"""
p = self._find_min()
item = p.element()
return (item._key, item._value)
def remove_min(self):
"""Remove and return (k,v) tuple with minimum key.
Raise Empty exception if empty.
"""
p = self._find_min()
item = self._data.delete(p)
return (item._key, item._value)
class SortedPriorityQueue(PriorityQueue):
"""
Implementation of a PriorityQueue using a sorted PositionalList
Adds items to the list in order
"""
def __init__(self):
"""
Creates an empty PriorityQueue
"""
self._data = PositionalList()
def __len__(self):
"""
returns: the number of items in the PriorityQueue
"""
return len(self._data)
def add(self, key, value):
"""
Adds a key-value pair to the PriorityQueue
"""
new_item = self._Item(key, value)
walk = self._data.last()
while walk is not None and new_item < walk.element():
walk = self._data.before(walk)
if walk is not None:
self._data.add_after(walk, new_item)
else:
self._data.add_first(new_item)
def min(self):
"""
returns: the (k,v) tuple with the minimum key, without removing it
"""
if self.is_empty():
raise Empty('Priority Queue is empty')
p = self._data.first()
item = p.element()
return (item._key, item._value)
def remove_min(self):
"""
removes the minimum (k,v) tuple from the priority queue
returns: the (k,v) tuple
"""
if self.is_empty():
raise Empty('Priority Queue is empty')
p = self._data.first()
item = self._data.delete(p)
return (item._key, item._value)
class UnsortedPriorityQueue(PriorityQueueBase):
def __init__(self):
self._data = PositionalList()
def __len__(self):
return len(self._data)
def _find_min(self):
if self.is_empty():
raise Empty('Priority queue is empty.')
min = self._data.first()
walk = self._data.after(min)
while walk is not None:
if walk.element() < min.element():
min = walk
walk = self._data.after(min)
return min
def add(self, key, value):
self._data.add_last(self._Item(key, value))
def min(self):
p = self._find_min()
item = p.element()
return item._key, item._value
def remove_min(self):
p = self._find_min()
item = self._data.delete(p)
return item._key, item._value
class UnsortedPriorityQueue(PriorityQueueBase):
"""
A priority queue class storing elements in arbitrary order
"""
def __init__(self):
self._data = PositionalList()
def __len__(self):
return len(self._data)
def _find_min(self):
if self.is_empty():
raise EmptyException("Priority Queue is empty.")
curr_min = self._data.first()
walk = self._data.after(curr_min)
while walk is not None:
if walk.element() < curr_min.element():
curr_min = walk
walk = self._data.after(walk)
return curr_min
def min(self):
p = self._find_min()
return (p.element()._key, p.element()._value)
def remove_min(self):
p = self._find_min()
item = self._data.delete(p)
return (item._key, item._value)
def add(self, k, v):
self._data.add_last(self._Item(k, v))
def top(self, k):
if not 1 <= k <= len(self):
raise ValueError('Illegal value for k')
temp = PositionalList()
for item in self._data:
temp.add_last(item)
for j in range(k):
highPos = temp.first()
walk = temp.after(highPos)
while walk is not None:
if walk.element()._count > highPos.element()._count:
highPos = walk
yield highPos.element()._value
temp.delete(highPos)
class SortedPriorityQueue(PriorityQueueBase): # base class defines _Item
"""A min-oriented priority queue implemented with a sorted list."""
# ------------------------------ public behaviors ------------------------------
def __init__(self):
"""Create a new empty Priority Queue."""
self._data = PositionalList()
def __len__(self):
"""Return the number of items in the priority queue."""
return len(self._data)
def add(self, key, value):
"""Add a key-value pair."""
newest = self._Item(key, value)
walk = self._data.last() # walk backward look for smaller
while walk and newest < walk.element():
walk = self._data.before(walk)
if not walk:
self._data.add_first(newest)
else:
self._data.add_after(walk, newest)
def min(self):
"""Return but do not remove (k,v) tuple with minimum key.
Raise Empty exception if empty.
"""
if self.is_empty():
raise Empty('Priority Queue is empty')
first = self._data.first()
item = first.element()
return (item._key, item._value)
def remove_min(self):
"""Remove and return (k,v) tuple with minimum key.
Raise Empty exception if empty.
"""
min = self._data.first()
item = self._data.delete(min)
return (item._key, item._value)
class SortedPriorityQueue(PriorityQueueBase): # base class defines _Item
"""A min-oriented priority queue implemented with a sorted list."""
#------------------------------ public behaviors ------------------------------
def __init__(self):
"""Create a new empty Priority Queue."""
self._data = PositionalList()
def __len__(self):
"""Return the number of items in the priority queue."""
return len(self._data)
def add(self, key, value):
"""Add a key-value pair."""
newest = self._Item(key, value) # make new item instance
walk = self._data.last() # walk backward looking for smaller key
while walk is not None and newest < walk.element():
walk = self._data.before(walk)
if walk is None:
self._data.add_first(newest) # new key is smallest
else:
self._data.add_after(walk, newest) # newest goes after walk
def min(self):
"""Return but do not remove (k,v) tuple with minimum key.
Raise Empty exception if empty.
"""
if self.is_empty():
raise Empty('Priority queue is empty.')
p = self._data.first()
item = p.element()
return (item._key, item._value)
def remove_min(self):
"""Remove and return (k,v) tuple with minimum key.
Raise Empty exception if empty.
"""
if self.is_empty():
raise Empty('Priority queue is empty.')
item = self._data.delete(self._data.first())
return (item._key, item._value)
def top(self, k):
"""Generate sequence of top k elements in terms of access count."""
if not 1 <= k <= len(self):
raise ValueError('Illegal value for k')
# we begin by making a copy of the original list
temp = PositionalList()
for item in self._data: # positional lists support iteration
temp.add_last(item)
# we repeatedly find, report, and remove element with largest count
for j in range(k):
# find and report next highest from temp
highPos = temp.first()
walk = temp.after(highPos)
while walk is not None:
if walk.element()._count > highPos.element()._count:
highPos = walk
walk = temp.after(walk)
# we have found the element with highest count
yield highPos.element()._value # report element to user
temp.delete(highPos) # remove from temp list
class UnsortedPriorityQueue(PriorityQueue):
"""
An implementstion of a PriorityQueue
Store items in an unsorted list
Requires searching the entire list when accessing items
"""
def __init__(self):
"""
Creates an empty PriorityQueue
"""
self._data = PositionalList()
def __len__(self):
"""
returns: the number of items in the PriorityQueue
"""
return len(self._data)
def add(self, key, value):
"""
Adds a key-value pair to the PriorityQueue
"""
self._data.add_last(self._Item(key, value))
def _find_min(self):
"""
Non-public utility method
returns: the item with the minimum key
"""
if self.is_empty():
raise Empty('Priority Queue is empty')
minimum = self._data.first()
walk = self._data.after(minimum)
while walk is not None:
if walk.element() < minimum.element(
): # __lt__ is implemented by the PriorityQueue class
minimum = walk
walk = self._data.after(walk)
return minimum
def min(self):
"""
returns: the (k,v) tuple with the minimum key, without removing it
"""
p = self._find_min()
item = p.element()
return (item._key, item._value)
def remove_min(self):
"""
removes the minimum (k,v) tuple from the priority queue
returns: the (k,v) tuple
"""
p = self._find_min()
item = self._data.delete(p) # PositionalList removes and returns item
return (item._key, item._value)
class SortedPriorityQueue(PriorityQueueBase):
def __init__(self):
#empty priority queue
self._data = PositionalList()
def __len__(self):
#number of items in priority queue
return len(self._data)
def add(self, key, value):
#add key-value pair
#._Item defined by base class
newest = self._Item(key, value)
walk = self._data.last()
#look for smaller key
while walk is not None and newest < walk.element():
walk = self._data.before(walk)
if walk is None:
self._data.add_first(newest)
else:
self._data.add_after(walk, newest)
def min(self):
#returns but does not remove the tuple with min key
if self.is_empty():
raise Empty('Priority queue is empty.')
p = self._data.first()
item = p.element()
return (item._key, item._value)
def remove_min(self):
#removes and returns the tuple with minimum key
if self.is_empty():
raise Empty('Priority queue is empty')
item = self._data.delete(self._data.first())
return (item._key)
def __iter__(self):
#iteration of the map's keys
for item in self._data:
yield item
class SortedListPQ(PriorityQueueBase): # base class defines _Item
"""A min-oriented priority queue implemented with an unsorted list."""
def __init__(self):
"""Create a new empty Priority Queue."""
self._data = PositionalList()
def __len__(self):
"""Return the number of items in the priority queue."""
return len(self._data)
def add(self, key, value):
"""Add a key-value pair."""
newest = self._Item(key, value)
walk = self._data.last()
while walk is not None and newest < walk.element():
walk = self._data.before(walk)
if walk is None:
self._data.add_first(newest)
else:
self._data.add_after(walk, newest)
def min(self):
"""Return but do not remove (k,v) tuple with minimum key.
Raise Empty exception if empty.
"""
if self.is_empty():
raise Empty("Priority queue is empty")
p = self._data.first()
item = p.element()
return item._key, item._value
def remove_min(self):
"""Remove and return (k,v) tuple with minimum key.
Raise Empty exception if empty.
"""
if self.is_empty():
raise Empty("Priority queue is empty")
item = self._data.delete(self._data.first())
return (item._key, item._value)
def top(self, k):
"""Generate sequence of top k elements in terms of access count."""
if not 0 <= k <= len(self):
raise ValueError("Illegal value for k")
# we begin my making copy of original list, as we will modify the temprary list
temp = PositionalList()
for item in self._data: # positional list supports iteration
temp.add_last(item)
# we repeatedly find, report, and remove elements with largest count from temp list
for j in range(k):
# find and report next highest from temp
highPos = temp.first()
walk = temp.after(highPos)
while walk != None:
if walk.element()._count > highPos.element()._count:
highPos = walk
walk = temp.after(walk)
# we have found element with the highest count
yield highPos.element()._value # report element to user
temp.delete(
highPos) # remove from temp to get next most accessed element
def main():
global screen, polygonList, mainloop
polygonList = PositionalList()
mainloop = True
while mainloop:
pygame.time.Clock().tick(FPS)
screen.blit(background, (0, 0))
update()
draw()
pygame.display.update()
pygame.quit()
class PositionalQueue(object):
""" A queue implementation based on positional list.
With enqueue returning a position instance and support for a new method,
delete(p), that removes the element associated with position p from the
queue.
"""
def __init__(self):
self._data = PositionalList()
def __len__(self):
""" Length method."""
return len(self._data)
def is_empty(self):
""" check if the queue is empty or not."""
return len(self._data) == 0
def first(self):
""" get the first element of the queue."""
if self._data.is_empty():
raise Empty('The queue is empty')
return self._data.first().element()
def enqueue(self, e):
""" add an element to the end of the queue.
:return: the Position of the element just be enqueued.
"""
return self._data.add_last(e)
def dequeue(self):
""" remove the first element of the queue."""
self._data.delete(self._data.first())
def delete(self, p):
""" Delete the element associated with position p."""
self._data.delete(p)
def __repr__(self):
return str(self._data)
def top(self, k):
if k < 1 or k > len(self._data):
raise ValueError("Invalid value for k.")
tmp = PositionalList()
for i in range(len(self._data)):
tmp.add_first(self._data.delete(self._data.first()))
for i in range(k):
p = tmp.first()
p_max = tmp.first()
max = p.element()._value
while p != None:
if p.element()._value > max:
p = self._data.after(p)
p_max = p.element()
max = p_max._value
yield max
def __init__(self): """Create a new empty Priority Queue.""" self._data = PositionalList()
class Mesh:
'''A polygonal mesh class. Contains a Python list of vertex tuples and
a positional list of faces that are themselves Python lists.
'''
def __init__(self):
self.__verts = list()
self.__faces = PositionalList()
self.__polygon_types = list(
) # RP: shape of polygon or the name of n-gon
self.__numberOfVertices = 0 # RP: total number of vertices
self.__totalPolygons = 0 # RP: total number of faces
self.__polygons = dict(
) # RP: count of each type of faces, 3 squares, 5 pentagons etc
self.__x_minimum = 0 # RP: minimum of x co-ordinates
self.__y_minimum = 0 # RP: minimum of y co-ordinates
self.__z_minimum = 0 # RP: minimum of z co-ordinates
self.__x_maximum = 0 # RP: maximim of x co-ordinates
self.__y_maximum = 0 # RP: maximim of y co-ordinates
self.__z_maximum = 0 # RP: maximim of z co-ordinates
def loadOBJ(self, f):
'''Loads data from an OBJ file and stores it in the __verts and __faces
data members. Also calculates the X,Y,Z bounds and the counts of
face's index sizes.
'''
with open(f, 'r') as infile:
text = infile.read()
lines = text.split('\n')
for line_number, line_value in enumerate(lines):
if line_value is not '':
elements = line_value.split()
if elements[0] == 'v':
self.__verts += [
(float(elements[1]), float(elements[2]),
float(elements[3]))
]
self.__numberOfVertices += 1
if elements[0] == 'f':
face = list()
for vertex_index in elements[1:]:
face.append(int(vertex_index))
self.__faces.add_last(
face) # RP: ist of vertex indexs, face
# RP: In len(face) if-statement, counting the number of each type of polygon, if len(face)=3 or
# RP: say triangle already exist, add one to it, else start count from 1
if len(face) in self.__polygon_types:
# RP: self.__polygons is the dictionary of total number of each polygons
self.__polygons[len(face)] += 1
else:
self.__polygon_types.append(len(face))
self.__polygons[len(face)] = 1
# RP: Adding all types of polygon all in the total polygons
self.__totalPolygons += 1
def get_stats(self):
'''Gets the stats of the Mesh data:
- the total number of vertices
- the total number of polygons
- the number of polygons of each number of sides
- the mininum and maximum X, Y, and Z coordinates for
the entire mesh
'''
# MVM: Hint for the total number of polys of each number of
# of sides, use a dictionary.
# RP: Made a list of x,y and z elements/coordinates, to get minimum and maximum of each co-ordinates individually
x_elements = list()
y_elements = list()
z_elements = list()
for vertex in self.__verts:
x_elements.append(vertex[0])
y_elements.append(vertex[1])
z_elements.append(vertex[2])
self.__x_minimum = min(x_elements)
self.__y_minimum = min(y_elements)
self.__z_minimum = min(z_elements)
self.__x_maximum = max(x_elements)
self.__y_maximum = max(y_elements)
self.__z_maximum = max(z_elements)
stats = {
"totalVertices": self.__numberOfVertices,
"totalPolygon": self.__totalPolygons,
"numberOfPolygons": self.__polygons,
"minimumXCoordinates": self.__x_minimum,
"minimumYCoordinates": self.__y_minimum,
"minimumZCoordinates": self.__z_minimum,
"maximumXCoordinates": self.__x_maximum,
"maximumYCoordinates": self.__y_maximum,
"maximumZCoordinates": self.__z_maximum
}
return stats
def writeVTK(self, outfile):
'''Writes a VTK legacy ASCII format file from data stored in __verts
and __faces.
'''
with open(outfile, 'w') as outfile:
# RP: First part of vtk file, uptil vertices
outfile.write('# vtk DataFile Version 3.0\n')
outfile.write('An object\n')
outfile.write('ASCII\n')
outfile.write('DATASET POLYDATA\n')
outfile.write('POINTS ' + str(self.__numberOfVertices) +
' float\n')
for vertex in self.__verts:
outfile.write(
str(vertex[0]) + ' ' + str(vertex[1]) + ' ' +
str(vertex[2]) + '\n')
outfile.write('\n')
# RP: As in the dictionary {key:value}, typeOfPolygon(tri/4/penta...gon) is the key and numberOfThosePolygon
# is the value, which together is used to calculate total points for vtk file.
total_points = 0
for typeOfPolygon, numberOfThosePolygon in self.__polygons.items():
total_points += (typeOfPolygon + 1) * numberOfThosePolygon
outfile.write('POLYGONS ' + str(self.__totalPolygons) + ' ' +
str(total_points) + '\n')
for face in self.__faces:
outfile.write(str(len(face)) + ' ')
for vertex_index in face:
outfile.write(str(vertex_index - 1) + ' ')
outfile.write('\n')
def triangularize(self):
'''Triangularizes any non-triangles in the face list. It modifes
the list be replacing non-triangles with two or more triangles. The
modifcation occurs at the site of the non-triangle.'''
# RP: Because in Triangulation, we only need to print number of triangles
if 3 not in self.__polygon_types:
self.__polygons[3] = 0
self.__polygon_types.append(3)
pos = self.__faces.first(
) # RP: setting position of the first list in the PositionalList(self.__faces)
while pos is not None: # RP: will do one face at a time
face = pos.element(
) # RP: accessing the elements in that position of the list calling it face
if len(face) > 3:
for n in range(2,
len(face) -
1): # RP: if face is [1 2 3 4] say in square
triangle = list()
triangle.append(face[0]) # RP: here goes, face[0]=1
triangle.extend(
face[n:n + 2]
) # RP: here goes a slice of face[2:4], which is 3,4, and is
# extended to previous one, making it [1 3 4] face as triangle
self.__faces.add_before(
pos, triangle
) # RP: Now adding that face [1 3 4] before [1 2 3], similarly all the
# triangle face is added before the place where it is cut
self.__polygons[3] += 1
self.__totalPolygons += 1
self.__faces.replace(pos,
face[0:3]) # RP: Slice of face [1 2 3]
self.__polygons[3] += 1
pos = self.__faces.after(
pos) # RP: Giving the position to the next one
new_polygons = {3: self.__polygons[3]}
self.__polygons = new_polygons
def __repr__(self):
'''Print user-friendly representation of the Mesh object.'''
# MVM: have this call get_stats()
output = 'This is a 3D object which consists of {} type(s) of polygon(s).\n'.format(
len(self.__polygons))
output += 'Polygon stats:\n'
try:
output += '\tTotal Vertices:{0:>16}\n'.format(
self.get_stats()['totalVertices'])
output += '\tTotal Polygons:{0:>16}\n'.format(
self.get_stats()['totalPolygon'])
for key, values in self.get_stats()['numberOfPolygons'].items():
output += '\tTotal {0} sided polygon:{1:>9}\n'.format(
key, values)
output += '\tMinimum x coordinate:{0:>10.2f}\n'.format(
self.get_stats()['minimumXCoordinates'])
output += '\tMaximum x coordinate:{0:>10.2f}\n'.format(
self.get_stats()['maximumXCoordinates'])
output += '\tMinimum y coordinate:{0:>10.2f}\n'.format(
self.get_stats()['minimumYCoordinates'])
output += '\tMaximum y coordinate:{0:>10.2f}\n'.format(
self.get_stats()['maximumYCoordinates'])
output += '\tMinimum z coordinate:{0:>10.2f}\n'.format(
self.get_stats()['minimumZCoordinates'])
output += '\tMaximum z coordinate:{0:>10.2f}\n'.format(
self.get_stats()['maximumZCoordinates'])
except:
output += 'NO DATA\n'
return output
class FavoritesList:
"""List of elements ordered from most frequently accessed to least."""
# ------------------------------ nested _Item class ------------------------------
class _Item:
__slots__ = '_value', '_count' # streamline memory usage
def __init__(self, e):
self._value = e # the user's element
self._count = 0 # access count initially zero
# ------------------------------- nonpublic utilities -------------------------------
def _find_position(self, e):
"""Search for element e and return its Position (or None if not found)."""
walk = self._data.first()
while walk is not None and walk.element()._value != e:
walk = self._data.after(walk)
return walk
def _move_up(self, p):
"""Move item at Position p earlier in the list based on access count."""
if p != self._data.first(): # consider moving...
cnt = p.element()._count
walk = self._data.before(p)
if cnt > walk.element()._count: # must shift forward
while (walk != self._data.first() and
cnt > self._data.before(walk).element()._count):
walk = self._data.before(walk)
self._data.add_before(walk, self._data.delete(p)) # delete/reinsert
# ------------------------------- public methods -------------------------------
def __init__(self):
"""Create an empty list of favorites."""
self._data = PositionalList() # will be list of _Item instances
def __len__(self):
"""Return number of entries on favorites list."""
return len(self._data)
def is_empty(self):
"""Return True if list is empty."""
return len(self._data) == 0
def access(self, e):
"""Access element e, thereby increasing its access count."""
p = self._find_position(e) # try to locate existing element
if p is None:
p = self._data.add_last(self._Item(e)) # if new, place at end
p.element()._count += 1 # always increment count
self._move_up(p) # consider moving forward
def remove(self, e):
"""Remove element e from the list of favorites."""
p = self._find_position(e) # try to locate existing element
if p is not None:
self._data.delete(p) # delete, if found
def top(self, k):
"""Generate sequence of top k elements in terms of access count."""
if not 1 <= k <= len(self):
raise ValueError('Illegal value for k')
walk = self._data.first()
for j in range(k):
item = walk.element() # element of list is _Item
yield item._value # report user's element
walk = self._data.after(walk)
def __repr__(self):
"""Create string representation of the favorites list."""
return ', '.join('({0}:{1})'.format(i._value, i._count) for i in self._data)
def __init__(self):
#empty priority queue
self._data = PositionalList()
def __init__(self):
self._data = PositionalList()
class FavoritesList:
"""List of elements ordered from most frequently accessed to least."""
# ------------------------------ nested _Item class -----------------------
class _Item:
__slots__ = "_value", "_count" # streamline memory usage
def __init__(self, e):
self._value = e # the user's element
self._count = 0 # access count initially zero
# ------------------------------- nonpublic utilities ---------------------
def _find_position(self, e):
"""Search for element e and return its Position (or None if not found)."""
walk = self._data.first()
while walk is not None and walk.element()._value != e:
walk = self._data.after(walk)
return walk
def _move_up(self, p):
"""Move item at Position p earlier in the list based on access count."""
if p != self._data.first(): # consider moving...
cnt = p.element()._count
walk = self._data.before(p)
if cnt > walk.element()._count: # must shift forward
while walk != self._data.first() and cnt > self._data.before(walk).element()._count:
walk = self._data.before(walk)
self._data.add_before(walk, self._data.delete(p)) # delete/reinsert
# ------------------------------- public methods --------------------------
def __init__(self):
"""Create an empty list of favorites."""
self._data = PositionalList() # will be list of _Item instances
def __len__(self):
"""Return number of entries on favorites list."""
return len(self._data)
def is_empty(self):
"""Return True if list is empty."""
return len(self._data) == 0
def access(self, e):
"""Access element e, thereby increasing its access count."""
p = self._find_position(e) # try to locate existing element
if p is None:
p = self._data.add_last(self._Item(e)) # if new, place at end
p.element()._count += 1 # always increment count
self._move_up(p) # consider moving forward
def remove(self, e):
"""Remove element e from the list of favorites."""
p = self._find_position(e) # try to locate existing element
if p is not None:
self._data.delete(p) # delete, if found
def top(self, k):
"""Generate sequence of top k elements in terms of access count."""
if not 1 <= k <= len(self):
raise ValueError("Illegal value for k")
walk = self._data.first()
for j in range(k):
item = walk.element() # element of list is _Item
yield item._value # report user's element
walk = self._data.after(walk)
def __repr__(self):
"""Create string representation of the favorites list."""
return ", ".join("({0}:{1})".format(i._value, i._count) for i in self._data)
def __init__(self):
"""Create an empty list of favorites."""
self._data = PositionalList() # will be list of _Item instances
def __init__(self):
self._data = PositionalList()
def __init__(self):
"""Create an empty list of favorites."""
self._data = PositionalList() # will be list of _Item instances
"""Print all elements of PositionalList as a string."""
print(", ".join([str(elem) for elem in L]))
def clear_positional_list(L):
"""Delete all elements from PositionalList."""
pos1 = L.first()
while len(L) > 0:
pos2 = L.after(pos1)
L.delete(pos1)
pos1 = pos2
if __name__ == "__main__":
# Test 1: print_positional_list(), clear_positional_list()
PL = PositionalList()
for i in range(0, 38, 2):
PL.add_last(i)
print("before deletion:")
print_positional_list(PL)
print("length =", len(PL))
clear_positional_list(PL)
print("after deletion:")
print_positional_list(PL)
print("length =", len(PL))
# Test 2: print_positional_list(), clear_positional_list()
print()
PL.add_last("apple")
PL.add_last("orange")
PL.add_last("pear")
def __init__(self): """Create a new empty Priority Queue.""" self._data = PositionalList()