def drawArc_Basic(grid, R):
x, y = 0, R
while x < y:
drawPixel_symmetry8(x, int(y + 0.5), 1, grid)
x += 1
y = sqrt(R**2 - x**2)
def drawArc_InscribedRegularPolygonApproximate(grid, R):
Alpha = 1 / R
cosAlpha, sinAlpha = cos(Alpha), sin(Alpha)
x, y = R, 0
while x >= y:
drawPixel_symmetry8(int(x + 0.5), int(y + 0.5), 1, grid)
x = cosAlpha * x - sinAlpha * y
y = sinAlpha * x + cosAlpha * y
def drawArc_PositiveNegative(grid, R):
F = 0
x, y = 0, R
while x <= y:
drawPixel_symmetry8(x, y, 1, grid)
print(F)
if F <= 0:
F += (x << 1) + 1
x += 1
else:
F += 1 - (y << 1)
y -= 1
def drawArc_MidPoint_with_DDA(grid, R):
d = 1 - R
x, y = 0, R
while x <= y:
drawPixel_symmetry8(x, y, 1, grid)
if d < 0:
x += 1
d += 2 * x + 3
else:
x += 1
y -= 1
d += ((x - y) << 1) + 5
def drawArc_MidPoint_with_DDA_nonreal(grid, R):
d = 1 - R
deltax, deltay = 3, 2 - (R << 1)
x, y = 0, R
while x <= y:
drawPixel_symmetry8(x, y, 1, grid)
if d < 0:
x += 1
d += deltax
deltax += 2
else:
x += 1
y -= 1
d += (deltax + deltay)
deltax += 2
deltay += 2
def drawArc_MidPoint_with_DDA_nonreal(grid, R, linetype):
d = 1 - R
deltax, deltay = 3, 2 - (R << 1)
counter = 0
x, y = 0, R
while x <= y:
if linetype[counter % len(linetype)]:
drawPixel_symmetry8(x, y, 1, grid)
if d < 0:
x += 1
d += deltax
deltax += 2
else:
x += 1
y -= 1
d += (deltax + deltay)
deltax += 2
deltay += 2
counter += 1