# state.ludic - which scene, its shots, and where the loop is in them
export state LabState {
  lb_plate: Actor = null
  lb_plate_dir: string = ""
  lp_table: []long = lp_crc_table()
  lp_w: int = 0
  lp_h: int = 0
  lb_scene: string = ""
  lb_frame: int = 0
  lb_shot_names: []string = null
  lb_shot_pose: []float = null    # 5 per shot: x, y, z, yaw and pitch in degrees
  lb_shot: int = 0                # the shot being taken or looked at
  lb_wait: int = 0                # frames held on it so far
  lb_settle: int = 45             # frames a shot is held before it is taken
  lb_out: string = ""             # build/lab/<scene>
  lb_windowed: bool = false
  lb_note: string = ""            # one line a scene may show under its title
  lb_font: string = ""            # an overlay font atlas directory; "" draws no captions
  lb_title: string = "Ludic Lab"
  lb_draw: fn() = null            # the scene's own drawing, beside the actors
  lb_shots_taken: int = 0
}

# frames a shot settles before it is taken (streaming, auto-exposure); 45 by default
export function lab_settle(lab_st: mut LabState, frames: int) -> void { lab_st.lb_settle = Math.max(1, frames) }
# the overlay's font atlas (a directory with font.json and font.png) for the captions
export function lab_font(lab_st: mut LabState, dir: string) -> void { lab_st.lb_font = dir }
export function lab_title(lab_st: mut LabState, title: string) -> void { lab_st.lb_title = title }
# one line under the scene's title in a window
export function lab_note(lab_st: mut LabState, s: string) -> void { lab_st.lb_note = s }
# the scene being shown, and the frame the clock is on (60 a second, whatever the machine)
export function lab_scene(lab_st: LabState) -> string { return lab_st.lb_scene }
export function lab_frame(lab_st: LabState) -> int { return lab_st.lb_frame }
export function lab_time(lab_st: LabState) -> float { return float(lab_st.lb_frame) / 60.0 }