from Constraint import Constraint

class YFix(Constraint):
    def __init__(self, shape, pt, val):
        self.shape = shape
        self.pt = pt
        self.val = val

    def toEqu(self):
        varrefs1 = self.shape.toEqu(self.pt)[1]
        coeffs = []
        for i in range(len(varrefs1)):
            coeffs.append((varrefs1[i], (self.shape, i)))
        return [(coeffs, -self.val)]