Function FindDirectionChanges

deps/tesseract/classify/mfoutline.cpp:121–143

---------------------------------------------------------------------------*/ * This routine searches through the specified outline, computes * a slope for each vector in the outline, and marks each * vector as having one of the following directions: * N, S, E, W, NE, NW, SE, SW * This information is then stored in the outline and the * outline is returned. * @param Outline micro-feature

 * @note History: 7/21/89, DSJ, Created.
 */
void FindDirectionChanges(MFOUTLINE Outline,
                          FLOAT32 MinSlope,
                          FLOAT32 MaxSlope) {
  MFEDGEPT *Current;
  MFEDGEPT *Last;
  MFOUTLINE EdgePoint;

  if (DegenerateOutline (Outline))
    return;

  Last = PointAt (Outline);
  Outline = NextPointAfter (Outline);
  EdgePoint = Outline;
  do {
    Current = PointAt (EdgePoint);
    ComputeDirection(Last, Current, MinSlope, MaxSlope);

    Last = Current;
    EdgePoint = NextPointAfter (EdgePoint);
  }
  while (EdgePoint != Outline);

}                                /* FindDirectionChanges */


/*---------------------------------------------------------------------------*/