How to correctly use orientation field in function rendering.draw_sprite()?

[yagaodirac]

rendering.draw_sprite{surface = self.surface, sprite = self.sprite, target = self.pos, orientation = ***no matter what number I tried, it doesn't make any difference***, time_to_live = 2, x_scale =0.25, y_scale = 0.25}

The sprite does show. But this field doesn't seem to have done anything. What is wrong?

Thanks.

[DaveMcW]

Code: Select all

/c rendering.draw_sprite{
  surface = game.player.surface,
  sprite = "item/electronic-circuit",
  target = game.player.character,
  orientation = 0.1,
  time_to_live = 2 * 60,
  x_scale = 0.25,
  y_scale = 0.25
}

[yagaodirac]

Yeah, thank you. It works.