def METHOD_NAME(self, t):
    new_pos0 = self.src0 + self.delta0 * t
    new_pos1 = self.src1 + self.delta1 * t
    new_pos2 = self.src2 + self.delta2 * t
    new_pos3 = self.src3 + self.delta3 * t
    self.set_vertex(0, 0, new_pos0)
    self.set_vertex(1, 0, new_pos1)
    self.set_vertex(1, 1, new_pos2)
    self.set_vertex(0, 1, new_pos3)