def _slope_l(self, x, y, height, slope):
hitpoint = MathUtils.calc_y_intercept(x, y, slope)
bounces = MathUtils.calc_folds(hitpoint, height)
return slope * (1 if bounces % 2 == 0 else -1 )
def _hitpoint_l(self, x, y, height, slope):
hitpoint = MathUtils.calc_y_intercept(x, y, slope)
return MathUtils.calc_folded_point(hitpoint, height)