TAU is a mathematical constant with the value 6.2831855. It is the circle constant relating the circumference of a circle to its linear dimension, the ratio of the circumference of a circle to its radius. It is useful in combination with trigonometric functions such as sin() and cos().
from hooman import Hooman
hapi = Hooman(500, 500)
hapi.background(255)
x = 10
y = 10
d = 100
hapi.stroke_size(5)
hapi.stroke(255, 0, 0)
hapi.arc(x, y, d, d, 0, hapi.TAU);
x += 100
hapi.stroke(0, 255, 0)
hapi.arc(x, y, d, d, 0, hapi.PI);
x += 100
hapi.stroke(0, 0, 255)
hapi.arc(x, y, d, d, 0, hapi.HALF_PI);
x += 100
hapi.stroke(0)
hapi.arc(x, y, d, d, 0, hapi.QUARTER_PI);
# pygame stuffs
while hapi.is_running:
hapi.event_loop()
hapi.flip_display()
hapi.pygame.quit()