| 272 | } |
| 273 | |
| 274 | fn scanner_state(&self) -> ScannerState { |
| 275 | let frame = self.frame_index % self.knight_total_frames.max(1); |
| 276 | let width = self.width; |
| 277 | let forward_frames = width; |
| 278 | let hold_end_frames = self.hold_end; |
| 279 | let backward_frames = width.saturating_sub(1); |
| 280 | let hold_start_frames = self.hold_start; |
| 281 | |
| 282 | if frame < forward_frames { |
| 283 | ScannerState { |
| 284 | active_position: frame, |
| 285 | is_holding: false, |
| 286 | hold_progress: 0, |
| 287 | is_moving_forward: true, |
| 288 | } |
| 289 | } else if frame < forward_frames + hold_end_frames { |
| 290 | ScannerState { |
| 291 | active_position: width.saturating_sub(1), |
| 292 | is_holding: true, |
| 293 | hold_progress: frame - forward_frames, |
| 294 | is_moving_forward: true, |
| 295 | } |
| 296 | } else if frame < forward_frames + hold_end_frames + backward_frames { |
| 297 | let backward_index = frame - forward_frames - hold_end_frames; |
| 298 | ScannerState { |
| 299 | active_position: width.saturating_sub(2).saturating_sub(backward_index), |
| 300 | is_holding: false, |
| 301 | hold_progress: 0, |
| 302 | is_moving_forward: false, |
| 303 | } |
| 304 | } else if frame < forward_frames + hold_end_frames + backward_frames + hold_start_frames { |
| 305 | ScannerState { |
| 306 | active_position: 0, |
| 307 | is_holding: true, |
| 308 | hold_progress: frame - forward_frames - hold_end_frames - backward_frames, |
| 309 | is_moving_forward: false, |
| 310 | } |
| 311 | } else { |
| 312 | ScannerState { |
| 313 | active_position: 0, |
| 314 | is_holding: true, |
| 315 | hold_progress: 0, |
| 316 | is_moving_forward: false, |
| 317 | } |
| 318 | } |
| 319 | } |
| 320 | |
| 321 | fn color_index(&self, char_index: usize, scanner: ScannerState) -> Option<usize> { |
| 322 | let directional_distance = if scanner.is_moving_forward { |