Difference between revisions of "CSC111 Final Exam 2018"

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=Problem 2: An Orange Tree =
 
=Problem 2: An Orange Tree =
 
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Write a well documented and organized Python program that will generate a tree ''as close to the tree shown below'' as possible. You should not reproduce the text in the image;  '''just the tree, its colors, and its fruit.'''
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[[Image:fractalTreeWithOranges2018.png|center|500px]]
 
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<center>[[Image:FractalTreeWithLeaves.png| 500px]]</center>
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* Modify the fractal tree program shown below so that it will generate an exact replica of the tree shown above.  You should not reproduce the text in the image;  '''just the tree, its colors, and its fruit.'''
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* Call your program '''final2.py''' and the image '''final2.jpg''' or '''final2.png'''.  Submit both to the same URL indicated in the Final Examp PB 2 section on Moodle.
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* Call your program '''final2.py''' and the image '''final2.jpg''' or '''final2.png'''.  Submit both to the same URL indicated in Problem #1.
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* Note: To change the color of a '''line''' with the graphics library, you should use the '''setOutline()''' method rather than the '''setFill()''' method.  To change the '''width''' of a line, you can use the '''setWidth()''' method.
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* Note: To change the color of a '''line''' with the graphics library, you should use the '''setOutline()''' method rather than the '''setFill()''' method.
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* I used only 3 colors to generate the tree above: "green", "blue", and "brown".
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* I used only 3 colors to generate the tree above: "orange", "blue", and "brown".
 
 
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::<source lang="python">
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# fractalTree.py
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# D. Thiebaut
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#
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# Draws a fractal tree on the graphic window.
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#
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from graphics import *
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import math
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import time
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import random
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# dimensions of the window
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MAXWIDTH = 800
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MAXHEIGHT = 700
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# recursive tree-drawing function
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#
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def draw_tree(win  ,      # the canvas
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              order,        # the level of recursion.  Starts positive.
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              theta,        # angle of new branch leaving this trunk
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              sz,          # size of this branch
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              x, y,        # coordinates of base of this branch
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              heading,      # angle of direction of this branch
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              color        # color
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              ):   
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  trunk_ratio = 0.29      # How big is the trunk relative to whole tree?
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  trunk = sz * trunk_ratio # length of trunk
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  # compute x, y of end of the current branch
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  delta_x = trunk * math.cos(heading)
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  delta_y = trunk * math.sin(heading)
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  x2, y2 = x + delta_x, y + delta_y
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  # draw current branch
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  branch = Line( Point( x, y), Point( x2, y2 ) )
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  branch.setWidth( 2 )
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  branch.setOutline( color )
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  branch.draw( win )
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  # if this branch has sub-branches, then recurse
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  if order > 0:   
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      # make the recursive calls to draw the two subtrees
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      newsz = sz*(1 - trunk_ratio)
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      draw_tree(win,
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                order-1, theta, newsz, x2, y2, heading-theta,
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                color )
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      draw_tree(win,
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                order-1, theta, newsz, x2, y2, heading+theta,
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                color )
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def drawName( win, name ):
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    ''' draws the programmer's name in a box, at the
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    bottom of the window'''
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    r = Rectangle( Point( 300, win.getHeight()-35 ),
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                  Point( win.getWidth()-300, win.getHeight()-5 ) )
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    r.setFill( "yellow" )
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    r.setOutline( "black" )
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    r.draw( win )
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    l = Text( Point( win.getWidth()//2, win.getHeight()-20 ),
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              name )
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    l.setFill( "black" )
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    l.draw( win )
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# draw 1 tree in the middle of the screen, shooting straight up.
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def main():
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    win = GraphWin("CSC111 Final Exam", MAXWIDTH, MAXHEIGHT )
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    # draw the fractal tree
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    theta = 0.55      # use 0.02 for tall skinny trees, 0.7 for fat trees
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    order = 9
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    draw_tree(win,
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              order,
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              theta,
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              MAXWIDTH*0.9, MAXWIDTH//2,
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              MAXHEIGHT-50,
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              -math.pi/2,
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              "magenta" )
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    # draw programmer's name in a box
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    drawName( win, "Mickey Mouse" )
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    # wait for user to click window
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    win.getMouse()
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    win.close()
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main()
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</source>
 
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</onlydft>
 
</onlydft>

Revision as of 16:38, 26 April 2018

D. Thiebaut (talk) 11:39, 26 April 2018 (EDT)


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