Why is this not working?

[lsk464]

Hi I'm a bit new the these groups/forums but don't know where else to turn for some help.

I've been learning and writing some python/pygame programs and this one has me stumped. I have my code to upload if someone is interested to help me.

In this game there are 16 faces arranged around a circle with a shooter in the center.

All faces should move towards the center. There is an xvel/yvel for each face but the faces are not moving properly. Some only move on the x-axis some only on the y-axis and some don't move at all ???  I can ZIP up my code and pics for anyone interested to help. Thanks!

[lsk464]

OK here is some simplified code, the issues is with line 33,34 see below:

# Pygame template - skeleton for a new pygame project

import pygame

import os

from math import sin,cos

WIDTH = 600

HEIGHT = 600

FPS = 10

PI=3.14159

# initialize pygame and create window

pygame.init()

pygame.mixer.init()

pygame.mixer.set_num_channels(16)

win = pygame.display.set_mode((WIDTH, HEIGHT))

pygame.display.set_caption("Gobblins")

clock = pygame.time.Clock()

# define game folder and assets folder

game_folder = os.path.dirname(__file__)

img_folder = os.path.join(game_folder, "bling")

gob_img=(pygame.image.load(os.path.join(img_folder,"face8.png")))

######################################################################

class Gob():

    def __init__(self,i,x,y):

        # velfactor of -80 then all faces move but velfactor of -300 and movement is not right at all

        velfactor=-300

        self.image=pygame.transform.scale(gob_img,(70,70))

        self.rect=self.image.get_rect()

        self.rect.center=(x+WIDTH/2,y+HEIGHT/2)

        self.xvel=round(x/velfactor*1.07,3)

        self.yvel=round(y/velfactor,3)

        print("%3d %8.3f %8.3f %8.3f %8.3f" % (i,x,y,self.xvel,self.yvel))

    def gupdate(self):

        (x,y)=self.rect.center

        x+=self.xvel

        y+=self.yvel

        self.rect.center=(x,y)

######################################################################

# Replace the stupid Python range() function with this much better one

def myrange(start=1,stop=10,step=1):    

    rng=[]

    x=start

    if step>0:

        while x<=stop:

            rng.append(x)

            x+=step

            x=round(x,5)

    else:

        while x>=stop:

            rng.append(x)

            x+=step

            x=round(x,5)

    return(rng)

#############################################################################

# this generates a list of "num_dots" coordiants (x,y) evenly distributed around a circle of radius "radius"

def dots(num_dots=12,radius=300):

    pts=[] ; num_dots/=2

    for a in myrange(PI/2,num_dots*5,PI/num_dots):

        Y=float(round(radius*cos(a)))

        X=float(round(radius*sin(a)))

        if [X,Y] in pts: break

        pts.append([X,Y])

    return(pts)  

######################################################################

# create goblins around a circle

gobs=[]

gpoints=dots(16,WIDTH/2-50)

for i,(x,y) in enumerate(gpoints):

    gob = Gob(i,x,y)

    gobs.append(gob)

######################################################################

# Game loop

run = True

while run:

    # keep loop running at the right speed - Frames Per Second

    clock.tick(FPS)

    # Process input (events)

    for event in pygame.event.get():

        # check for closing window

        if event.type == pygame.QUIT:

            run = False

    # Update

    for gob in gobs:

        gob.gupdate()

    # Draw / render the screen

    win.fill('white')

    for gob in gobs:

        win.blit(gob.image,(gob.rect.x,gob.rect.y))

    pygame.draw.circle(win,'red',(WIDTH/2,HEIGHT/2),300,2)

    pygame.draw.circle(win,"red",(WIDTH/2,HEIGHT/2),5,2)

    pygame.display.flip()

pygame.quit()