Rename files, add headers, fix typos in 13

thinkcspy/Chapter-16-Exercises/Problem4_mountain.py

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+# Runestone.Academy thinkcspy course
+# Chapter 16
+# Problem 4
+
+import turtle
+import random
+
+
+def drawTriangle(points,color,myTurtle):
+    myTurtle.fillcolor(color)
+    myTurtle.up()
+    myTurtle.goto(points[0][0],points[0][1])
+    myTurtle.down()
+    myTurtle.begin_fill()
+    myTurtle.goto(points[1][0],points[1][1])
+    myTurtle.goto(points[2][0],points[2][1])
+    myTurtle.goto(points[0][0],points[0][1])
+    myTurtle.end_fill()
+
+
+def getMid(p1, p2, delta):
+    return ( (((p1[0]+p2[0]) / 2) + random.uniform(-delta, delta)), 
+            (((p1[1] + p2[1]) / 2) + random.uniform(-delta, delta)))
+
+
+def fractalMnt(points,degree,myTurtle):
+    colormap = ['floralwhite','brown','darkgoldenrod','olive','maroon']
+    
+    drawTriangle(points,colormap[degree],myTurtle)
+
+    if degree > 0:
+        mid1 = getMid(points[0], points[1], 10)
+        mid2 = getMid(points[0], points[2], 10)
+        mid3 = getMid(points[1], points[2], 10)
+
+        fractalMnt([points[0], mid1, mid2], degree-1, myTurtle)
+        fractalMnt([points[1], mid1, mid3], degree-1, myTurtle)
+        fractalMnt([points[2], mid3, mid2], degree-1, myTurtle)
+        fractalMnt([mid1, mid3, mid2], degree-1, myTurtle)
+        
+
+def main():
+   myTurtle = turtle.Turtle()
+   myWin = turtle.Screen()
+   myPoints = [[-100,-50],[0,100],[100,-50]]
+   fractalMnt(myPoints,4,myTurtle)
+   myWin.exitonclick()
+
+main()