Moving a drawn shape in pygame

[thehivetyrant]

Greetings Pythoneers.

I've got this problem and the problem is thus:

i have drawn a shape using pygame.draw.circle

i am finding it hard to make it move.
i tried self.move_to(self.x-5,self.y) and also self.forward(random.randint(0,10)) (Where forward is defined as a function as self.x,self.y + 10 )<== I dont think i defined the function right in this test though.
Since (random.randint(0,10)) should move it a random number between 0,10 shouldnt it?

anyway any help on how to get it to move would be appreciated.
I hope i gave enough info. And you can keep it simple if you'd like i'm sure i'll probably be able to adapt it to my needs ^^

Thanks in advance

PS: I already have all the blitting and display flips and such in place.

[masterofpuppets]

hi
I haven't really used pygame but here's an example on how to do this using Tkinter. I guess it would be something similar:

from Tkinter import *
import time

root = Tk(); root.geometry( "200x200+400+200" )
c = Canvas( root, width = 200, height = 200 ); c.pack()

ball = c.create_oval( 0, 0, 0, 0 )
xInc = 3
ballX = 30
while True:
    time.sleep( 0.05 )
    c.delete( ball )
    ball = c.create_oval( ballX, 100, ballX + 5, 105, fill = "blue" )
    if ballX > 200 or ballX < 0:
        xInc = -xInc
    ballX += xInc
    c.update()

mainloop()

hope this helps. again haven't really used pygame :)

[fallopiano]

when you draw a circle on the screen w/ pygame, you are not making a class instance. you are calling a function. you would need to have a seperate x and y variable incrementing up every game loop to make it look like it is moving

[thehivetyrant]

Hmm i do have a tuple that says what x,y co-ords the circle is drew at:

self.Circle1 = x,y = 100,200

i thought i could just increase that?

i need to create another x,y?

[lllllIllIlllI]

Yes you would increase that, but you would also need to completely redraw the whole circle. As well as that you would need to clear the last circle.

[thehivetyrant]

oops

[thehivetyrant]

It is in a loop = TRUE and i do also do a display flip.

I know the screen works because i get name=labelfont.render to appear and move x+=1 and that works but the circle is killing me.

i have: Defintion of forward

def forward(distance):
        self.x = self.x + distance
        self.y = self.y + distance

And then: definition of step

class Circle1(Circles):
    def step(self,x,y):
        d=distance(x,y,self.x,self.y)
        if d<3: #circle should stop moving if close to the other circle
            return
        
        #if the x,y of the second circle is greater or less than the first 
        #then turn the circle accordingly.
        if x<self.x and y<self.y:
            self.angle=math.radians(315)
        elif x>self.x and y<self.y:
            self.angle=math.radians(45)
        elif x<self.x and y>self.y:
            self.angle=math.radians(225)
        elif x>self.x and y>self.y:
            self.angle=math.radians(135)
        self.forward(random.randint(0,10)) # move forward

and later : Calling that function

loop=True
    while loop:
        #Clear
        screen.fill(BLACK)
        
        Circle1.step(Circle2.getPos()[0],Circle2.getPos()[1])

It seems to just skip it though and decide not to do anything.

I apologise for the spliced up code as i shouldnt post all of it up since it's homework.
I have the feeling thats going to be hard to work with though.

[vegaseat]

Here is a simple example that just erases and redraws the shape ...

# exploring module pygame
# draw a white circle on a black screen and move it
# by erasing and redrawing the circle within a set time delay

import pygame as pg

# (r, g, b) tuple --> black
black = (0, 0, 0)

# window/screen width and height
w = 600
h = 400
# default background is black
screen = pg.display.set_mode((w, h))

# set up some of the circle specs
# (r, g, b) tuple --> white
color = (255, 255, 255)
radius = 150
# optional width of the circle's border
# if width = 0 (or not given) the shape is filled with color
width = 0

for delta in range(0, 180, 2):
    x = 200 + delta
    y = 200
    position = (x, y)  # (x,y) coordinates of center
    # this erases the old sreen with black
    screen.fill(black)
    pg.draw.circle(screen, color, position, radius, width)
    # update screen
    pg.display.flip()
    # small time delay
    milliseconds = 50
    pg.time.delay(milliseconds)

# event loop ...
running = True
while running:
    for event in pg.event.get():
        # quit when window corner x is clicked
        if event.type == pg.QUIT:
            running = False