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Cannot figure out how to add anti-aliasing & color the circle produced from Mid-Point Circle Drawing Algorithm. The following is my code, should I implement it using another library?

from pygame import gfxdraw
import sys,pygame
pygame.init()

screen = pygame.display.set_mode((400,400))
screen.fill((0,0,0))
pygame.display.flip()

def circle(radius,offset):
    x,y = 0,radius
    plotCircle(x,y,radius,offset)

def symmetry_points(x,y,offset):
    gfxdraw.pixel(screen,x+offset,y+offset,(255,255,255))
    gfxdraw.pixel(screen,-x+offset,y+offset,(255,255,255))
    gfxdraw.pixel(screen,x+offset,-y+offset,(255,255,255))
    gfxdraw.pixel(screen,-x+offset,-y+offset,(255,255,255))
    gfxdraw.pixel(screen,y+offset,x+offset,(255,255,255))
    gfxdraw.pixel(screen,-y+offset,x+offset,(255,255,255))
    gfxdraw.pixel(screen,y+offset,-x+offset,(255,255,255))
    gfxdraw.pixel(screen,-y+offset,-x+offset,(255,255,255))
    pygame.display.flip()

def plotCircle(x,y,radius,offset):
    d = 5/4.0 - radius
    symmetry_points(x,y,radius+offset)
    while x < y:
        if d < 0:
            x += 1
            d += 2*x + 1
        else:
            x += 1
            y -= 1
            d += 2*(x-y) + 1
        symmetry_points(x,y,radius+offset)

circle(100,25) # circle(radius,<offset from edge>)
pygame.display.flip()

while 1:
    for event in pygame.event.get():
        if event.type == pygame.QUIT: sys.exit()
ChocoApplePiez
  • 35
  • 6
  • see [Is there a more efficient way of texturing a circle?](https://stackoverflow.com/a/61097673/2521214) ... You can use `(r*r - x*x - y*y)` as parameter for the anti aliasing – Spektre Oct 17 '22 at 06:03

0 Answers0