Is it possible for a turtle to detect whether it is touching a specific colour, or not, without using a grid system (i.e. allocating each cell a colour.) I am trying to create a pixelated world that a creature will navigate, and interact with, depending on what sort of tile it is touching, which will be determined based on the tile's colour.
The best you could try to replicate this Scratch project in Python would be a grid based system using the python framework, pygame.
This would mean you need to code the background, user, interface, commands, collisions. A bigger feat to do all by your own hands.
My files indicate that this would be a good video series to get started:
Setup: https://youtu.be/VO8rTszcW4s
Creating The Game: https://youtu.be/3UxnelT9aCo
I hope your endeavor is fruitful!
We can force turtle to do this by dropping down to the tkinter level. Although we think of things that the turtle draws as dead ink (as opposed to shaped turtles or stamps), they are in fact live ink from tkinter's point of view -- which is why we can clear an individual turtle's drawings and call undo(). Here's a fragile example that does this:
from turtle import Screen, Turtle
from random import random
WIDTH, HEIGHT = 800, 800
DIAMETER = 200
def chameleon(x, y):
turtle.ondrag(None)
overlapping = canvas.find_overlapping(x, -y, x, -y) # adjust to tkinter coordinates
if overlapping:
color = canvas.itemcget(overlapping[0], "fill")
if color:
turtle.fillcolor(color)
turtle.goto(x, y)
turtle.ondrag(chameleon)
screen = Screen()
screen.setup(WIDTH, HEIGHT)
canvas = screen.getcanvas()
turtle = Turtle()
turtle.hideturtle()
turtle.speed('fastest')
turtle.penup()
for x in range(-WIDTH//2, WIDTH//2, DIAMETER):
for y in range(-HEIGHT//2, HEIGHT//2, DIAMETER):
turtle.goto(x + DIAMETER/2, y + DIAMETER/2)
color = random(), random(), random()
turtle.dot(DIAMETER - 1, color)
turtle.home()
turtle.shape('turtle')
turtle.shapesize(2)
turtle.showturtle()
turtle.ondrag(chameleon)
screen.mainloop()
As you drag the turtle around the screen, it will pick up color from things drawn on the screen. This isn't a clear turtle that you're seeing through, it's reading the ink, which you can confirm for yourself as you move over the background. This code may be turtle implementation specific.
I'm not sure how well this will scale up (or more likely scale down towards pixel size objects) but should give you an idea what's possible if you're willing to embrace turtle's tkinter underpinnings, or simply use tkinter itself.
This is my first question on StackOverflow, so bear with me. I am trying to have my turtle's shape be a small circle. However, the default circle is too big for my project. Is there a way to make it smaller? My company won't let me load a gif file to be the shape of a turtle.
What I've tried so far is with a gif file where I do:
import turtle
screen = turtle.Screen()
screen.register_shape('circle1', 'circle.gif')
t = turtle.Turtle()
t.shape('circle1')
t.forward(10)
This works but uses a gif file, which my company doesn't allow. Is there a way I can do this without a gif?
Working with the set of cursors that Python provides, including 'circle', you can adjust the size of the cursor using the shapesize() method (aka turtlesize):
from turtle import Screen, Turtle
screen = Screen()
turtle = Turtle()
turtle.shape('circle')
turtle.shapesize(0.5) # make the cursor half the default size
turtle.forward(100)
screen.exitonclick()
Above, we resized it relative to it's default size. If we want to size it to a specific pixel size, we start with the knowledge that the provided cursors are based on a 20px by 20px square, and adjust accordingly:
from turtle import Screen, Turtle
CURSOR_SIZE = 20
screen = Screen()
turtle = Turtle()
turtle.shape('circle')
turtle.shapesize(15 / CURSOR_SIZE) # make the cursor 15 pixels diameter
turtle.color('black', 'white') # make it an open circle this time
turtle.forward(100)
screen.exitonclick()
What you can do is input the polynomial corresponding to the size of the circle you want.
register_shape takes in more than just a file name, it can also take in coordinates.
i.e. screen.register_shape(name, coordinates) is another way of using that function.
If you want to make the circle smaller, draw the circle with the corresponding size and append it to a list. Then convert that list into a tuple and that can be your new shape.
In general you can draw any shape, append the coordinates and use that.
Here is an example for a circle:
Specific Example
import turtle
def drawCircle(radius,iterations, t): # returns tuples
coords = []
for i in range(iterations):
t.forward(radius)
t.right(360.0/iterations)
coords.append((t.xcor(), t.ycor()))
return tuple(coords)
t = turtle.Turtle()
screen = turtle.Screen()
screen.register_shape('myCircle', drawCircle(1, 72, t))
t.shape('myCircle')
General Example
import turtle
def drawShape(t):
coords = []
while # turtle move
coords.append((t.xcor(), t.ycor()))
return tuple(coords)
t = turtle.Turtle()
screen = turtle.Screen()
screen.register_shape('myShape', drawShape(t))
t.shape('myShape')
Note that when you do have a custom shape, then turtle will automatically fill it in for you. So this won't be a circle, but a filled-in circle instead.
python how can i make the shapes?
This is what I did
import turtle,random,sys
turtle.title("SHOT")
turtle.setup (width=800, height=600)
turtle.bgcolor("light green")
turtle.screensize(10, 400)
class boxes:
box_A = turtle.getturtle()
box_B = turtle.getturtle()
box_A.hideturtle()
box_B.hideturtle()
box_A.setposition(-300,0)
box_A.setposition(300,0)
box_A.showturtle()
box_B.showturtle()
And my computer draw line... I don't want line...
so I want to erase the line and
I want to make a rectangle boxes(two)
I tried to make rectangle with
box_A.shape("rectangle")
Definitely, it wasn't working;;;
guys plz help me
You can create a custom shape by using coordinates. First, do the normal statements.
import turtle
t = turtle.Turtle()
s = turtle.Screen() # The Screen is VERY important for this project!
Ok! Now to change t's shape, we have to enter a set of coordinates. Here are a few presets you can use I made:
Pointer: ((15,0),(0,25),(-15,0),(0,3))
Noel Star: ((0,20),(-5,5),(-20,0),(-5,-5),(0,-20),(5,-5),(20,0),(5,5))
X: ((15,15),(-15,-15),(0,0),(15,-15),(-15,15),(0,0))
Cross: ((-7.5,-15),(7.5,-15),(7.5,-7.5),(15,-7.5),(15,7.5),(7.5,7.5),(7.5,15),(-7.5,15),(-7.5,7.5),(-15,7.5),(-15,-7.5),(-7.5,-7.5))
Right Triangle: ((20,0),(0,-20),(0,0))
Arrow: ((-15,7.5),(-10,0),(-15,-7.5),(5,-7.5),(15,0),(5,7.5))
Parallelogram: ((-30,20),(-40,-20),(30,-20),(40,20))
Rhombus: ((0,-20),(-10,0),(0,20),(10,0))
Trapezoid: ((-20,20),(20,20),(30,0),(-30,0))
Pentagon: ((-5,10),(-10,0),(-5,-10),(5,-10),(10,0),(5,10))
Hexagon: ((-10,20),(-20,0),(-10,-20),(10,-20),(20,0),(10,20))
Octagon: ((-10,20),(10,20),(20,10),(20,-10),(10,-20),(-10,-20),(-20,-10),(-20,10))
The rectangle's coordinates are: ((-20,10),(20,10),(20,-10),(-20,-10)). To register this as a custom shape, use the register_shape() function. The first argument is what you will name the shape; 'rectangle', in this case. The second argument is the coordinates, so save them as a variable.
rectCors = ((-20,10),(20,10),(20,-10),(-20,-10));
s.register_shape('rectangle',rectCors);
Ok. Now just tell the turtle that its shape is a rectangle.
t.shape('rectangle');
Done! In total, thats:
import turtle
t = turtle.Turtle();
s = turtle.Screen();
rectCors = ((-20,10),(20,10),(20,-10),(-20,-10));
s.register_shape('rectangle',rectCors);
t.shape('rectangle');
Note:
There is no way to change the shape from horizontal to vertical, if you were wondering, except t.setheading(90) or t.setheading(-90).
just do
object.shape("square")
object.shapesize(X, Y)
this will make a rectangle based on it's pixels
or do this
object.shape("square")
object.shapesize(stretch_wid=5, stretch_len=1)
this will produce a rectangle based on a ratio of 5:1, each unit is a square
Draw four lines:
box_A.setposition(-300,0)
box_A.setposition(-300,200)
box_A.setposition(0,200)
box_A.setposition(0,0)
I think this is what you're trying too do
import turtle
wn = turtle.Screen()
wn.tracer()
bird = turtle.Turtle()
bird.shape("square")
You have to do square, rect isn't a shape in turtle
bird.shapesize(stretch_wid=5, stretch_len=10)
Then just stretch it too a rectangle by making the width longer than height
bird.color("green")
bird.setpos(0, 0)
bird.penup()
Penup is for if you're moving it, it won't draw a line behind it
bird.speed(0)
The speed just makes the animation instant if you do that
wn.exitonclick()
Hope this helped
So far I have this and it makes two circles but one is off-screen. I want to center it and have them separate from each other. Right now it does two loops but I want it to do one small circle then go on to make a larger one around the first in the middle of the screen. Both need to be diff. colors.
def sun_and_earth():
import turtle #allows me to use the turtles library
turtle.Turtle()
turtle.Screen() #creates turtle screen
turtle.window_height()
turtle.window_width()
turtle.bgcolor('grey') #makes background color
turtle.color("red", "green")
turtle.circle(2, 360) #draws a (size, radius) circle
turtle.circle(218, 360)
turtle.exitonclick() #exits out of turtle window on click of window
I think you may have some misunderstanding with regard to some of the functions in the turtle library. Firstly, turtle.window_height() and turtle.window_width() return the height and width of the window, so (as these values are not being assigned) those two lines do nothing. Similarly, turtle.Screen() returns an object, so again that line does nothing.
In order to centre your circles, you need to change where the turtle starts by using the turtle.setpos() function. This will change the x and y coordinates of where your turtle is. If you start the turtle one radius down, this will effectively centre the circle at (0, 0), because the center of the circle is (from the documentation) one radius to the left.
Remember to take your pen off the page when you are moving so that you don't draw lines between the two points by accident, and to put the pen back down again when you want to draw again.
Try this code:
import turtle
turtle.Turtle()
turtle.bgcolor('grey')
# decide what your small circle will look like
smallColour = "red"
smallRadius = 5
# draw the small circle
turtle.color(smallColour)
turtle.penup()
turtle.setpos(0, -smallRadius)
turtle.pendown()
turtle.circle(smallRadius)
# decide what your large circle will look like
largeColour = "white"
largeRadius = 100
# draw the large circle
turtle.color(largeColour)
turtle.penup()
print(turtle.pos())
turtle.setpos(0, -largeRadius)
print(turtle.pos())
turtle.pendown()
turtle.circle(largeRadius)
turtle.penup()
turtle.setpos(0, 0)
I hope this helps, but I think that you have a few misunderstandings about the use of the turtle, it might be a good idea to look at a tutorial or maybe take a look at the documentation
Best of luck