So this is a program I made for some dots to be attracted to a bigger dot and for that bigger dot to grow. The issue I'm facing right now is that the dots don't follow the bigger dot but rather seem to move away from it. The way I'm getting it to get closer is by translating the points, one to (0,0), the other to [t2.xcor() - t1.xcor() , t2.ycor()- t1.ycor()] , and then finding C with the Pythagorean theorem, and then using arc cosine to find the angle it needs to face in order to move towards the bigger dot.
from turtle import *
import sys
from math import *
#grows t1 shape + has it follow cursor
def grow(x, y):
t1.ondrag(None)
t1.goto(x,y)
global big, nig
t1.shapesize(big,nig)
big += .004
nig += .004
t1.ondrag(grow)
follow()
#has create()'d dots follow t1
def follow():
global count
#t1.ondrag(None)
screen.tracer(0,0)
for p in lx:
#print(lx[0:5])
t2.goto(p, ly[count])
t2.dot(4, "white")
if ly[count] != 0:
yb = abs(t2.ycor() - t1.ycor())
xb = abs((t2.xcor() - t1.xcor()))
c = sqrt((xb**2 + yb**2))
#print(y,x,c)
#print(lx)
t2.seth(360 - degrees(acos(yb/c)))
else:
t2.seth(0)
t2.forward(20)
t2.dot(4, "purple")
lx.pop(count)
ly.pop(count)
lx.insert(count, t2.xcor())
ly.insert(count, t2.ycor())
count += 1
#print(lx[0:5])
#screen.update()
screen.tracer(1,10)
count = 0
#t1.ondrag(follow)
#quits program
def quit():
screen.bye()
sys.exit(0)
#create()'s dots with t2
def create():
screen.tracer(0,0)
global nux, nuy, count3
while nuy > -400:
t2.goto(nux, nuy)
if t2.pos() != t1.pos():
t2.dot(4, "purple")
lx.append(t2.xcor())
ly.append(t2.ycor())
nux += 50
count3 += 1
if count3 == 17:
nuy = nuy - 50
nux = -400
count3 = 0
screen.tracer(1, 10)
#variables
count3 = count = 0
big = nig = .02
lx = []
ly = []
nux = -400
nuy = 300
screen = Screen()
screen.screensize(4000,4000)
t2 = Turtle()
t2.ht()
t2.pu()
t2.speed(0)
t2.shape("turtle")
t1 = Turtle()
t1.shape("circle")
t1.penup()
t1.speed(0)
t1.color("purple")
t1.shapesize(.2, .2)
create()
screen.listen()
screen.onkeypress(quit, "Escape")
t1.ondrag(grow)
#t1.ondrag(follow)
#screen.update()
screen.mainloop()
I see two (similar) issues with your code. First, you can toss the fancy math as you're reinventing turtle's .towards() method which gives you the angle you seek. Second, you're reinventing stamps which, unlike most turtle elements, can be cleared cleanly off the screen via clearstamp(). Also, you're using parallel arrays of coordinates which indicates lack of a proper data structure. I've replaced this with a single array containing tuples of positions and stamps.
I've adjusted the dynamics of your program, making the dots act independently (on a timer) and not rely on the movement of the cursor. I.e. they move towards the cursor whether it's moving or not. Also, I've made the cursor only grow when a dot reaches it and disappears:
from turtle import Turtle, Screen
CURSOR_SIZE = 20
def move(x, y):
""" has it follow cursor """
t1.ondrag(None)
t1.goto(x, y)
screen.update()
t1.ondrag(move)
def grow():
""" grows t1 shape """
global t1_size
t1_size += 0.4
t1.shapesize(t1_size / CURSOR_SIZE)
screen.update()
def follow():
""" has create()'d dots follow t1 """
global circles
new_circles = []
for (x, y), stamp in circles:
t2.clearstamp(stamp)
t2.goto(x, y)
t2.setheading(t2.towards(t1))
t2.forward(2)
if t2.distance(t1) > t1_size // 2:
new_circles.append((t2.position(), t2.stamp()))
else:
grow() # we ate one, make t1 fatter
screen.update()
circles = new_circles
if circles:
screen.ontimer(follow, 50)
def create():
""" create()'s dots with t2 """
count = 0
nux, nuy = -400, 300
while nuy > -400:
t2.goto(nux, nuy)
if t2.distance(t1) > t1_size // 2:
circles.append((t2.position(), t2.stamp()))
nux += 50
count += 1
if count == 17:
nuy -= 50
nux = -400
count = 0
screen.update()
# variables
t1_size = 4
circles = []
screen = Screen()
screen.screensize(900, 900)
t2 = Turtle('circle', visible=False)
t2.shapesize(4 / CURSOR_SIZE)
t2.speed('fastest')
t2.color('purple')
t2.penup()
t1 = Turtle('circle')
t1.shapesize(t1_size / CURSOR_SIZE)
t1.speed('fastest')
t1.color('orange')
t1.penup()
t1.ondrag(move)
screen.tracer(False)
create()
follow()
screen.mainloop()
You should be able to rework this code to do whatever it is you want. I strongly recommend you spend some time reading the Turtle documentation so you don't need to reinvent its many features.
Related
I'm trying to make a function which draws an irregular arc similar to figure 1, instead it has drawn a spiral. I'm not sure how to draw one correctly and there are no functions to do this to my knowledge
Long Arc - Figure 1
import turtle
char = turtle.Turtle()
char.speed(0)
screen = turtle.Screen()
screen.tracer(False)
def draw_arc(length, left_right):
sx = char.xcor()
sy = char.ycor()
def turn(angle):
if left_right:
char.left(angle)
else:
char.right(angle)
count = 1.8
turn(90)
char.forward(1)
while char.xcor() != sx and char.ycor() != sy and count >= 0:
char.forward(1)
turn(1 * count)
count -= 0.01
draw_arc(100, True)
screen.update()
turtle.listen()
turtle.mainloop()
import turtle
t = turtle.Pen(visible=False)
t.speed('fastest')
t.left(90)
for x in range(180):
t.forward(1)
t.right(1)
add this line and modify it until it fit ur need ( setx() or sety )
t.setx( x * 1.5)
from graphics import*
import time
import random
def main():
numx=random.randint(10,700)
wn=GraphWin("AK",700,700)
wn.setBackground("white")
msg=Text(Point(25,30),"Score")
msg.setSize(12)
msg.setTextColor('blue')
msg.draw(wn)
inch=Entry(Point(60,30),2)
inch.setFill('white')
inch.draw(wn)
sqrg=Rectangle(Point(330,650),Point(430,665))
sqrg.setFill("red")
sqrg.draw(wn)
blx=Circle(Point(numx,80),20)
blx.setFill("blue")
blx.draw(wn)
xval=10
yval=0
wn.getMouse()
for i in range(150):
sqrg.move(xval,yval)
symbl=wn.checkKey()
if symbl=="Right":
xval=10
yval=0
if symbl=="Left":
xval=-10
yval=0
time.sleep(0.08)
blx.move(0,20)
main()
I'm very confused my professor is very confusing, and I need to do this for a project where when collision is detected the score goes up.
Your radius is twenty. Inside the loop, just test whether Euclidean distance between sqrg and blx is within 20.
Below is a stripped down example based on your code. It measures the distance between the centers of the two moving objects to determine if a collision has occurred. If you manage to get the ball to hit the square, the ball should bounce straight up:
from random import randint
from time import sleep
from graphics import *
def distance(p1, p2):
return ((p2.x - p1.x) ** 2 + (p2.y - p1.y) ** 2) ** 0.5
wn = GraphWin("AK", 700, 700)
sqrg = Rectangle(Point(325, 625), Point(375, 675))
sqrg.setFill("red")
sqrg.draw(wn)
numx = randint(10, 700)
blx = Circle(Point(numx, 80), 20)
blx.setFill("blue")
blx.draw(wn)
xval, yval = 10, 0
bheading = 1
wn.getMouse()
for i in range(150):
sqrg.move(xval, yval)
if distance(blx.getCenter(), sqrg.getCenter()) < 25:
bheading *= -1
symbl = wn.checkKey()
if symbl == "Right":
xval = 10
elif symbl == "Left":
xval = -10
sleep(0.1)
blx.move(0, bheading * 20)
Cleary not a viable game as-is, but a demonstration of collision detection.
So I've been attempting to make some dots not only come towards a circle but also to make them orbit it. To do this I am using cosine and sine, however I'm running into issues with getting the dots to move forward as well as setting their distance. With the code below the dots are able to form a circle around the bigger dot, as well as follow it, but they don't approach the dot nor do they, when having the coordinates scaled by their distance from t1, come to that location, but instead do funky stuff. This is referring specifically to the line
t2.goto(2 * (t1.xcor() + math.degrees(math.cos(math.radians(t1.towards(t2)))) // 1), 2 * (t1.ycor() + math.degrees(math.sin(math.radians(t1.towards(t2)))) // 1))
which I had replaced with:
t2.goto(dist * (t1.xcor() + math.degrees(math.cos(math.radians(t1.towards(t2)))) // 1), dist * (t1.ycor() + math.degrees(math.sin(math.radians(t1.towards(t2)))) // 1))
and that gave me the sporadic view of the dots attempting to follow the bigger dot.
This line is found in the follow() function. Create() makes the smaller dots, move() moves the bigger dot and grow() grows the bigger dot on collision with the smaller dots. Produce() and redraw() are supposed to be a stage 2 of the program, but those functions are irrelevant to the question. Finally, quit() just exits the Screen() and quits the program.
Thanks to cdlane for help with organizing data and updating the screen more efficiently.
Code as of now:
from turtle import Turtle, Screen
import sys
import math
CURSOR_SIZE = 20
def move(x, y):
""" has it follow cursor """
t1.ondrag(None)
t1.goto(x, y)
screen.update()
t1.ondrag(move)
def grow():
""" grows t1 shape """
global t1_size, g
t1_size += 0.1
t1.shapesize(t1_size / CURSOR_SIZE)
g -= .1
t1.color((r/255, g/255, b/255))
screen.update()
def follow():
""" has create()'d dots follow t1 """
global circles, dist
new_circles = []
for (x, y), stamp in circles:
t2.clearstamp(stamp)
t2.goto(x, y)
dist = t2.distance(t1) / 57.29577951308232 // 1
t2.goto(2 * (t1.xcor() + math.degrees(math.cos(math.radians(t1.towards(t2)))) // 1), 2 * (t1.ycor() + math.degrees(math.sin(math.radians(t1.towards(t2)))) // 1))
t2.setheading(t2.towards(t1))
if t2.distance(t1) < t1_size // 1:
if t2.distance(t1) > t1_size * 1.2:
t2.forward(500/t2.distance(t1)//1)
else:
t2.forward(3)
if t2.distance(t1) > t1_size // 2:
new_circles.append((t2.position(), t2.stamp()))
else:
grow() # we ate one, make t1 fatter
screen.update()
circles = new_circles
if circles:
screen.ontimer(follow, 10)
else:
phase = 1
produce()
def create():
""" create()'s dots with t2 """
count = 0
nux, nuy = -400, 300
while nuy > -400:
t2.goto(nux, nuy)
if t2.distance(t1) > t1_size // 2:
circles.append((t2.position(), t2.stamp()))
nux += 20
count += 1
if count == 40:
nuy -= 50
nux = -400
count = 0
screen.update()
def quit():
screen.bye()
sys.exit(0)
def redraw():
t2.color("black")
t2.shapesize((t2_size + 4) / CURSOR_SIZE)
t2.stamp()
t2.shapesize((t2_size + 2) / CURSOR_SIZE)
t2.color("white")
t2.stamp()
def produce():
#create boundary of star
global t2_size, ironmax
t1.ondrag(None)
t1.ht()
t2.goto(t1.xcor(), t1.ycor())
t2.color("black")
t2.shapesize((t1_size + 4) / CURSOR_SIZE)
t2.stamp()
t2.shapesize((t1_size + 2) / CURSOR_SIZE)
t2.color("white")
t2.stamp()
#start producing helium
while t2_size < t1_size:
t2.color("#ffff00")
t2.shapesize(t2_size / 20)
t2.stamp()
t2_size += .1
redraw()
screen.update()
ironmax = t2_size
t2_size = 4
while t2_size < ironmax:
t2.shapesize(t2_size / 20)
t2.color("grey")
t2.stamp()
t2_size += .1
screen.update()
# variables
t1_size = 6
circles = []
phase = 0
screen = Screen()
screen.screensize(900, 900)
#screen.mode("standard")
t2 = Turtle('circle', visible=False)
t2.shapesize(4 / CURSOR_SIZE)
t2.speed('fastest')
t2.color('purple')
t2.penup()
t2_size = 4
t1 = Turtle('circle')
t1.shapesize(t1_size / CURSOR_SIZE)
t1.speed('fastest')
r = 190
g = 100
b = 190
t1.color((r/255, g/255, b/255))
t1.penup()
t1.ondrag(move)
screen.tracer(False)
screen.listen()
screen.onkeypress(quit, "Escape")
create()
follow()
#print(phase)
screen.mainloop()
I took another crack at this, just looking at the problem of meteors swarming around a planet. Or in this case, moon as I chose Deimos as my model. I attempted to work at scale making the coordinate system 1 pixel = 1 kilometer. At the start, Deimos sits in a field of meteors each of which has a random heading but they all have the same size and velocity:
from turtle import Turtle, Screen
from random import random
METEOR_VELOCITY = 0.011 # kilometers per second
METEOR_RADIUS = 0.5 # kilometers
SECONDS_PER_FRAME = 1000 # each updates represents this many seconds passed
UPDATES_PER_SECOND = 100
DEIMOS_RADIUS = 6.2 # kilometers
G = 0.000003 # Deimos gravitational constant in kilometers per second squared
CURSOR_SIZE = 20
def follow():
global meteors
new_meteors = []
t = SECONDS_PER_FRAME
for (x, y), velocity, heading, stamp in meteors:
meteor.clearstamp(stamp)
meteor.goto(x, y)
meteor.setheading(heading)
meteor.forward(velocity * t)
meteor.setheading(meteor.towards(deimos))
meteor.forward(G * t * t)
meteor.setheading(180 + meteor.towards(x, y))
if meteor.distance(deimos) > DEIMOS_RADIUS * 2:
new_meteors.append((meteor.position(), velocity, meteor.heading(), meteor.stamp()))
screen.update()
meteors = new_meteors
if meteors:
screen.ontimer(follow, 1000 // UPDATES_PER_SECOND)
def create():
""" create()'s dots with meteor """
count = 0
nux, nuy = -400, 300
while nuy > -400:
meteor.goto(nux, nuy)
if meteor.distance(deimos) > DEIMOS_RADIUS * 2:
heading = random() * 360
meteor.setheading(heading) # all meteors have random heading but fixed velocity
meteors.append((meteor.position(), METEOR_VELOCITY, meteor.heading(), meteor.stamp()))
nux += 20
count += 1
if count % 40 == 0:
nuy -= 50
nux = -400
screen.update()
meteors = []
screen = Screen()
screen.screensize(1000, 1000)
screen.setworldcoordinates(-500, -500, 499, 499) # 1 pixel = 1 kilometer
meteor = Turtle('circle', visible=False)
meteor.shapesize(2 * METEOR_RADIUS / CURSOR_SIZE)
meteor.speed('fastest')
meteor.color('purple')
meteor.penup()
deimos = Turtle('circle')
deimos.shapesize(2 * DEIMOS_RADIUS / CURSOR_SIZE)
deimos.color("orange")
deimos.penup()
screen.tracer(False)
create()
follow()
screen.mainloop()
The first variable to investigate is METEOR_VELOCITY. At the setting provided, most meteors will crash into the moon but a few obtain orbital velocity. If you halve its value, all meteors will crash into the moon. If you double its value, a few meteors obtain escape velocity, leaving the window; a few may crash into the moon; most will form an orbiting cloud that gets smaller and tighter.
I tossed the trigonometric stuff and reverted back to degrees instead of radians. I use vector addition logic to work out the motion.
In the end, it's just a crude model.
By changing 180 to some other offsets, for example 195, in the def follow() in cdlane's code,
meteor.setheading(195 + meteor.towards(x, y))
then the metors would not go straight (180 degree) towards the Deimos, but instead would show some spiral movement towards the center.
Great example provided!
I'm trying to make a game where you click a bunch of random circles and get a score, however I also want it to deduct from your score when you miss the circle. I've been trying to use screen.onclick() but instead of deducting the score on a misclick it seems to deduct the score every second for no reason. What am I doing wrong?
import turtle
from random import random, randint
import time
CURSOR_SIZE = 20
score=0
def addscore():
global score
score += 1
def deletescore():
global score
score -= 1
def my_circle(color):
radius = (15)
circle = turtle.Turtle('circle', visible=False)
circle.shapesize(radius / CURSOR_SIZE)
circle.color(color)
circle.penup()
while True:
nx = randint(2 * radius - width // 2, width // 2 - radius * 2)
ny = randint(2 * radius - height // 2, height // 2 - radius * 2)
circle.goto(nx, ny)
for other_radius, other_circle in circles:
if circle.distance(other_circle) < 2 * max(radius, other_radius):
break
else:
break
circle.showturtle()
circle.onclick(lambda x,y,t=circle: (circle.hideturtle(), addscore()))
screen.onclick(deletescore())
return radius, circle
username=str(input("Set your username: "))
screen = turtle.Screen()
screen.bgcolor("lightgreen")
screen.title("Speed Clicker")
width, height = screen.window_width(), screen.window_height()
circles = []
gameLength = 30
difficulty = 20
startTime = time.time()
while True:
time.sleep(1/difficulty)
rgb = (random(), random(), random())
timeTaken = time.time() - startTime
circles.append(my_circle(rgb))
screen.title('SCORE: {}, TIME LEFT: {}'.format(score,int(round(gameLength - timeTaken,0))))
if time.time() - startTime > gameLength:
break
screen.title('GG! FINAL SCORE: {}'.format(score))
screen.mainloop()
The problem is this line:
screen.onclick(deletescore())
It's in the wrong place (only needs to be called once, not in a loop) and the argument is incorrect, it should be passing the function not calling it:
screen.onclick(deletescore)
The fix is multifold: first, move the modified statement to just before your while True: statement. Then fix the definition of deletescore() to take x and y arguments that we won't use but are necessary to be a click handler. (Or wrap it in a lambda like the call to addscore())
However, a click on a turtle can also be passed through as a click on the screen. To counter this, we can add 2 in addscore() instead of 1 since deletescore() will get called as well. That should be enough to get things working.
However, we really should eliminate the while True: loop and sleep() call which have no place in an event-driven program. Instead we use ontimer() to keep things moving and not potentially block other events. The reformulated code would be more like:
from turtle import Turtle, Screen
from random import random, randint
from time import time
CURSOR_SIZE = 20
def addscore():
global score
score += 2 # add 2 as this will also count as a -1 screen click!
def deletescore():
global score
score -= 1
def my_circle(color):
circle = Turtle('circle', visible=False)
circle.shapesize(radius / CURSOR_SIZE)
circle.color(color)
circle.penup()
while True:
nx = randint(2 * radius - width // 2, width // 2 - radius * 2)
ny = randint(2 * radius - height // 2, height // 2 - radius * 2)
circle.goto(nx, ny)
for other_radius, other_circle in circles:
if circle.distance(other_circle) < 2 * max(radius, other_radius):
break
else:
break
circle.onclick(lambda x, y: (circle.hideturtle(), addscore()))
circle.showturtle()
return radius, circle
def play():
rgb = (random(), random(), random())
timeTaken = time() - startTime
circles.append(my_circle(rgb))
screen.title('SCORE: {}, TIME LEFT: {}'.format(score, int(round(gameLength - timeTaken, 0))))
if time() - startTime > gameLength:
screen.title('FINAL SCORE: {}'.format(score))
screen.onclick(None)
screen.clear()
else:
screen.ontimer(play, 1000 // difficulty)
screen = Screen()
screen.bgcolor("lightgreen")
screen.title("Speed Clicker")
width, height = screen.window_width(), screen.window_height()
score = 0
circles = []
radius = 15
difficulty = 20
gameLength = 30
screen.onclick(lambda x, y: deletescore())
startTime = time()
play()
screen.mainloop()
I have written a turtle program in python, but there are two problems.
It goes way too slow for larger numbers, I was wonder how I can speed up turtle.
It freezes after it finishes and when clicked on, says 'not responding'
This is my code so far:
import turtle
#Takes user input to decide how many squares are needed
f=int(input("How many squares do you want?"))
c=int(input("What colour would you like? red = 1, blue = 2 and green =3"))
n=int(input("What background colour would you like? red = 1, blue = 2 and green =3"))
i=1
x=65
#Draws the desired number of squares.
while i < f:
i=i+1
x=x*1.05
print ("minimise this window ASAP")
if c==1:
turtle.pencolor("red")
elif c==2:
turtle.pencolor("blue")
elif c==3:
turtle.pencolor("green")
else:
turtle.pencolor("black")
if n==1:
turtle.fillcolor("red")
elif n==2:
turtle.fillcolor("blue")
elif n==3:
turtle.fillcolor("green")
else:
turtle.fillcolor("white")
turtle.bk(x)
turtle.rt(90)
turtle.bk(x)
turtle.rt(90)
turtle.bk(x)
turtle.rt(90)
turtle.bk(x)
turtle.rt(90)
turtle.up()
turtle.rt(9)
turtle.down()
By the way: I am on version 3.2!
Set turtle.speed("fastest").
Use the turtle.mainloop() functionality to do work without screen refreshes.
Disable screen refreshing with turtle.tracer(0, 0) then at the end do turtle.update()
Python turtle goes very slowly because screen refreshes are performed after every modification is made to a turtle.
You can disable screen refreshing until all the work is done, then paint the screen, it will eliminate the millisecond delays as the screen furiously tries to update the screen from every turtle change.
For example:
import turtle
import random
import time
screen = turtle.Screen()
turtlepower = []
turtle.tracer(0, 0)
for i in range(1000):
t = turtle.Turtle()
t.goto(random.random()*500, random.random()*1000)
turtlepower.append(t)
for i in range(1000):
turtle.stamp()
turtle.update()
time.sleep(3)
This code makes a thousand turtles at random locations, and displays the picture in about 200 milliseconds.
Had you not disabled screen refreshing with turtle.tracer(0, 0) command, it would have taken several minutes as it tries to refresh the screen 3000 times.
https://docs.python.org/2/library/turtle.html#turtle.delay
For reference, turtle being slow is an existing problem.
Even with speed set to max, turtle can take quite a long time on things like fractals.
Nick ODell reimplemented turtle for speed here: Hide Turtle Window?
import math
class UndrawnTurtle():
def __init__(self):
self.x, self.y, self.angle = 0.0, 0.0, 0.0
self.pointsVisited = []
self._visit()
def position(self):
return self.x, self.y
def xcor(self):
return self.x
def ycor(self):
return self.y
def forward(self, distance):
angle_radians = math.radians(self.angle)
self.x += math.cos(angle_radians) * distance
self.y += math.sin(angle_radians) * distance
self._visit()
def backward(self, distance):
self.forward(-distance)
def right(self, angle):
self.angle -= angle
def left(self, angle):
self.angle += angle
def setpos(self, x, y = None):
"""Can be passed either a tuple or two numbers."""
if y == None:
self.x = x[0]
self.y = x[1]
else:
self.x = x
self.y = y
self._visit()
def _visit(self):
"""Add point to the list of points gone to by the turtle."""
self.pointsVisited.append(self.position())
# Now for some aliases. Everything that's implemented in this class
# should be aliased the same way as the actual api.
fd = forward
bk = backward
back = backward
rt = right
lt = left
setposition = setpos
goto = setpos
pos = position
ut = UndrawnTurtle()