亀に問題がある

Question

私はカメに問題があります。

これは、これまでのコードです：

''' 
Levi Davis 
This program demonstrates my knowledge on turtles based on problem one in the 
third set of homework questions 
''' 

import turtle 
import math 

def draw_arc(t, angle, num_segments, length): 
    ''' 
    draws an arc with turtle 't' that has a number of segments equal to 'num_segments' 
    and a length equal to 'length' with a turn angle of 'angle' divided by 'num_segments' 
    ''' 

    #this is my calculations on the actual turning of the turtle 
    turn_angle = angle // num_segments 
    init_turn = ((num_segments - 1) * turn_angle) // 2 

    #the initial turn of the turtle and the loop to make the arc 
    t.right(init_turn) 
    for count in range(num_segments): 
     t.forward(length/num_segments) 
     t.left(turn_angle) 

    #undoing the final turn and the initial turn 
    t.right(turn_angle + init_turn) 

def draw_squiggle(t, angle, num_segments, length, num_squiggles): 
    ''' 
    This function utilizes draw_arc() to create a squiggly line 
    ''' 
    for x in range(num_squiggles): 
     draw_arc(t, angle, num_segments, length) 
     draw_arc(t, -(angle), num_segments, length) 

def draw_petal(t, angle, num_segments, length): 
    ''' 
    draws a filled in petal shape using 2 arcs and a 180 degree turn 
    ''' 
    t.begin_fill() 
    draw_arc(t, angle, num_segments, length) 
    t.left(180) 
    draw_arc(t, angle, num_segments, length) 
    t.left(180) 
    t.end_fill() 

def draw_leaf(t, angle, num_segments, length): 
    draw_petal(t, angle, num_segments, length) 
    t.fillcolor(t.pencolor()) 
    draw_petal(t, angle, num_segments, (length/2)) 

wn = turtle.Screen() 


bob = turtle.Turtle() 
bob.pencolor("tomato2") 
bob.pensize(5) 
bob.fillcolor("black") 


#Because clare told me to I made her into a turtle 
clare = turtle.Turtle() 
clarepen = "green" 
clarefill = "purple" 
clare.pencolor(clarepen) 
clare.pensize(3) 
clare.fillcolor(clarefill) 

#testing of functions 

    #draw_arc(bob, 100, 10, 10) 
    #draw_arc(bob, -100, 10, 10) 
    #draw_squiggle(bob, -100, 10, 10, 2) 
    #draw_petal(clare, 100, 10, 40) 
    #draw_leaf(clare, 100, 10, 40) 

#that one shape that is kind of trippy to look at... I think?... 
size = 80 
def draw_weird_shape(t1, t2): 
    startx = -size/2 
    starty = -size/2 * math.tan(math.radians(144 /2)) 
    t1.up() 
    t1.goto(startx, starty) 
    t1.down() 
    t2.up() 
    t2.goto(startx, starty) 
    t2.down() 

    t1_fill = "purple" 
    t1_pen = "green" 

    for count in range(10): 
     t1.forward(size/2) 
     t1.right(90) 
     draw_squiggle(t1, 50, 10, 20, 2) 
     draw_leaf(t1, 50, 10, 50) 
     t1.pencolor(t1_pen) 
     t1.fillcolor(t1_fill) 
     t1.right(180) 
     draw_squiggle(t1, 50, 10, 20, 2) 
     t1.right(90) 
     t1.forward(size/2) 
     t1.left(36)   
     t2.up() 
     t2.forward(size) 
     t2.left(18) 
     t2.right(90) 
     t2.down() 
     draw_petal(t2, 50, 5, 25) 
     t2.up() 
     t2.left(108) 

draw_weird_shape(clare, bob) 

''' 
clare.forward(20) 
clare.left(18) 
clare.right(90) 
clare.forward(20) 
clare.left(180) 
clare.forward(20) 
clare.right(90) 
clare.forward(20) 
''' 

wn.exitonclick() 

波線は、それはそれのように180度ターンに戻っていない戻って起動すると、問題が線100

の周りにあるように思われる

すべきだ。

Answer 1

くすぐりが戻ってきたら、180 度に戻ることはありません。

あなたの問題は、このコードです：

#this is my calculations on the actual turning of the turtle 
turn_angle = angle // num_segments 
init_turn = ((num_segments - 1) * turn_angle) // 2 

整数の除算、//を使用することで、波線の基礎となるアークコードが同じパスをたどるないことだけで十分なエラーを紹介します。代わりに、もう少し正確にそれを維持するために、浮動小数点除算、/を使用します。

# this is my calculations on the actual turning of the turtle 
turn_angle = angle/num_segments 
init_turn = ((num_segments - 1) * turn_angle)/2