canvas.py 文件源码

def calculate_target_coordinates(self):

        amplitude = self.amplitude
        coef = (2 * pi) / self.period
        phase = radians(self.phase)

        def simple_sine(x):
            return (amplitude * sin((x * coef - phase)))
        calculate = np.vectorize(simple_sine)

        x_variables = np.arange(self.major_axis_span, dtype=float)
        y_variables = calculate(x_variables)
        y_variables = self.normalize_to_zero(y_variables)
        return self.prepare_coordinates(x_variables, y_variables)