fields.py 文件源码

def get_line_region(self, position, name=''):
        """Creates a line region at the given position (start_x, start_y, end_x, end_y),
        inclusive.

        Args:
            position: Position of the line region (start_x, start_y, end_x, end_y).
            name: Name of the region.

        Returns:
            Line region.
        """

        start_idx = self.get_index(position[:2])
        end_idx = self.get_index(position[2:])

        x_diff = start_idx % self.x.samples - end_idx % self.x.samples
        y_diff = int(start_idx / self.x.samples) - int(end_idx / self.x.samples)

        num_points = max(np.abs([x_diff, y_diff]))
        point_indices = []

        for ii in range(num_points + 1):

            x_position = start_idx % self.x.samples - np.round(ii / num_points * x_diff)
            y_position = int(start_idx / self.x.samples) - np.round(ii / num_points * y_diff)
            point_indices.append(int(x_position + self.x.samples * y_position))

        return reg.LineRegion(point_indices, position, name=name)