Wyrwyk-隐式曲线栅格化器 例子 sin(a)*x == -cos(a)*y sin( x * x + y * y ) + y > a cos(a)*x - sin(a)*y == (sin(a)*x + cos(a)*y) * (sin(a)*x + cos(a)*y) sin( t ) sqrt(x*x + y*y) == a x*x*x -10*x*y + y*y*y == 0 sin(x)*x*x -10*sin(x)*y + cos(y)*y*y <= 0 sin(x)