| 312 | } |
| 313 | |
| 314 | void OLEDDisplay::fillTriangle(int16_t x0, int16_t y0, int16_t x1, int16_t y1, |
| 315 | int16_t x2, int16_t y2) { |
| 316 | int16_t a, b, y, last; |
| 317 | |
| 318 | if (y0 > y1) { |
| 319 | _swap_int16_t(y0, y1); |
| 320 | _swap_int16_t(x0, x1); |
| 321 | } |
| 322 | if (y1 > y2) { |
| 323 | _swap_int16_t(y2, y1); |
| 324 | _swap_int16_t(x2, x1); |
| 325 | } |
| 326 | if (y0 > y1) { |
| 327 | _swap_int16_t(y0, y1); |
| 328 | _swap_int16_t(x0, x1); |
| 329 | } |
| 330 | |
| 331 | if (y0 == y2) { |
| 332 | a = b = x0; |
| 333 | if (x1 < a) { |
| 334 | a = x1; |
| 335 | } else if (x1 > b) { |
| 336 | b = x1; |
| 337 | } |
| 338 | if (x2 < a) { |
| 339 | a = x2; |
| 340 | } else if (x2 > b) { |
| 341 | b = x2; |
| 342 | } |
| 343 | drawHorizontalLine(a, y0, b - a + 1); |
| 344 | return; |
| 345 | } |
| 346 | |
| 347 | int16_t |
| 348 | dx01 = x1 - x0, |
| 349 | dy01 = y1 - y0, |
| 350 | dx02 = x2 - x0, |
| 351 | dy02 = y2 - y0, |
| 352 | dx12 = x2 - x1, |
| 353 | dy12 = y2 - y1; |
| 354 | int32_t |
| 355 | sa = 0, |
| 356 | sb = 0; |
| 357 | |
| 358 | if (y1 == y2) { |
| 359 | last = y1; // Include y1 scanline |
| 360 | } else { |
| 361 | last = y1 - 1; // Skip it |
| 362 | } |
| 363 | |
| 364 | for (y = y0; y <= last; y++) { |
| 365 | a = x0 + sa / dy01; |
| 366 | b = x0 + sb / dy02; |
| 367 | sa += dx01; |
| 368 | sb += dx02; |
| 369 | |
| 370 | if (a > b) { |
| 371 | _swap_int16_t(a, b); |
nothing calls this directly
no outgoing calls
no test coverage detected