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#### Senad Ibraimoski -student-Mathematical Institute B

to me, because I was boring him with questions.I'm new to python, and

I have problem plotting Quadratic Functions. Using module pygame.

Here is the code:

#!/usr/bin/env python

import pygame

def main():

import sys

import math

from math import sqrt

#Input equation coefficients

screen=pygame.display.set_mode((400,400))

pygame.display.set_caption( ' Ploting ' )

screen.fill((255,255,255))

pen=((0,0,255))

dark=(0,0,0)

ox=200

oy=200

a= int(raw_input('Input coefficient a ' ))

b= int(raw_input('Input coefficient b ' ))

c= int(raw_input('Input coefficient c ' ))

pygame.draw.aaline(screen,((255,0,0)),((200,0)) ,((200,400)))

pygame.draw.aaline(screen,((255,0,0)),((0,200)), ((400,200)))

if a==0:

if b==0:

print 'No solutions'

else:

x= -c/b

print x

else:

d=b*b-4*a*c

if d<0:

num=complex(-b/(2*a),sqrt(-d)/(2*a))

print num

else:

x1=(-b+sqrt(d))/(2*a)

x2=(-b-sqrt(d))/(2*a)

print 'x1= ' ,x1

print 'x2= ' ,x2

while 1:

for event in pygame.event.get():

if event ==pygame.QUIT:

print ' Quitting'

pygame.quit()

sys.exit(1)

x=-50;

while x<=50:

y=(a*(x**2) + b*x + c) *(-1)

screen.set_at(((x+ox),(y+oy)),dark)

pygame.display.flip()

x=x+1;

return 0

if __name__ == '__main__': main()

For now I'm plotting function only when Determinant >0. Or in other

words, when equation has two solutions,

x1,x2 e R... Now if you start my program you will see where problem

is. It's with function, It so bad drawn.

When I try to increment x in loop by 0.1 for every pass, I get

problems because method set_at() Which sets pixel requires integer...

Also I see I have problems with event handling here:

while 1:

for event in pygame.event.get():

if event ==pygame.QUIT:

print ' Quitting'

pygame.quit()

sys.exit(1)

When I click X, or exit on windows it doesn't exit.

What do you suggest I do...?

I don't have in this year Computer Graphics on my faculty. So this are

my first steps in this area of CS.

Regards,

S.I