43 lines
1.9 KiB
Python
43 lines
1.9 KiB
Python
#!/usr/bin/python3
|
|
"""The linesegment module defines the class line_segment."""
|
|
|
|
import random
|
|
import point
|
|
|
|
class LineSegment:
|
|
"""The class LineSegment defines a two-dimensional line segment in the coordinate system
|
|
starting at a startpoint and ending at a endpoint."""
|
|
def __init__(self, startpoint=point.Point(), endpoint=point.Point()):
|
|
"""Initialize the line segment."""
|
|
self.set_startpoint(startpoint)
|
|
self.set_endpoint(endpoint)
|
|
def set_startpoint(self, new_startpoint):
|
|
"""Set or change the startpoint of the line segment. If not a Point object is given
|
|
the startpoint gets set to a default value of Point(0,0)."""
|
|
self.__startpoint = new_startpoint
|
|
def get_startpoint(self):
|
|
"""Returns the current startpoint"""
|
|
return self.__startpoint
|
|
def set_endpoint(self, new_endpoint):
|
|
"""Set or change the endpoint of the line segment. If not a Point object is given
|
|
the endpoint gets set to a default value of Point(0,0)."""
|
|
self.__endpoint = new_endpoint
|
|
def get_endpoint(self):
|
|
"""Returns the current endpoint"""
|
|
return self.__endpoint
|
|
def get_length(self):
|
|
"""Returns the length of the line segment."""
|
|
diff_x = abs(self.__startpoint.get_x() - self.__endpoint.get_x())
|
|
diff_y = abs(self.__startpoint.get_y() - self.__endpoint.get_y())
|
|
return ((diff_x ** 2) + (diff_y ** 2)) ** (1/2.0)
|
|
def str(self):
|
|
"""Return the line segment values as string."""
|
|
return self.__startpoint.str() + "-->" + self.__endpoint.str()
|
|
def draw(self):
|
|
"""TODO: Draw the line segment in a canvas."""
|
|
|
|
def get_random(min_x=0, max_x=100, min_y=0, max_y=100):
|
|
"""Set the point to a random place inside the boundaries"""
|
|
return LineSegment(point.Point(random.randint(min_x, max_x), random.randint(min_y, max_y)), \
|
|
point.Point(random.randint(min_x, max_x), random.randint(min_y, max_y)))
|