def random(corners=[-1,-1,1,1]):
"""Return a random material segment within the given corners."""
return MaterialSegment([MaterialPoint.random(corners) for i in range(2)])
def random(corners=[-1,-1,1,1],number=5):
"""Create a random material form."""
points=[MaterialPoint.random(min,max) for n in range(number)]
return MaterialForm(points)