images.py 文件源码

def tang(self, r2, r3, r4):
        """Quality function that takes 3 radiuses and makes 4 circles that are kissing"""
        c2 = Circle(0, 0, r2)  # The first circle is placed at the origin
        c3 = Circle(r2 + r3, 0, r3)  # The second circle is placed kissing the first circle to the right
        x = (r2 * r2 + r2 * r4 + r2 * r3 - r3 * r4) / (
        r2 + r3)  # Magic triangle maths to figure out where the of the third circle should go
        y = cmath.sqrt((r2 + r4) * (r2 + r4) - x * x)
        c4 = Circle(x.real, y.real, r4)
        c1 = self.outer(c2, c3, c4)  # The outer circle is generated based on the first 3
        offx = 0 - c1.x
        offy = 0 - c1.y
        c2.correct(offx, offy)  # Offsets all the circles so the biggest circle is centered instead of the first circle
        c3.correct(offx, offy)
        c4.correct(offx, offy)
        c1.correct(offx, offy)
        return c1, c2, c3, c4