Function CaculateCubicLength

exporter/src/export/stream/StreamProperty.cpp:73–90

}

static float CaculateCubicLength(const BezierPoint* points, float distance, unsigned minT,
                                 unsigned maxT, const float& precision) {
  if (TSpanBigEnough(maxT - minT) && CubicTooCurvy(points, precision)) {
    auto halfT = (minT + maxT) >> 1;
    auto p1 = InterpolatePoint(points[0], points[1], 0.5);
    auto bc = InterpolatePoint(points[1], points[2], 0.5);
    auto p5 = InterpolatePoint(points[2], points[3], 0.5);
    auto p2 = InterpolatePoint(p1, bc, 0.5);
    auto p4 = InterpolatePoint(bc, p5, 0.5);
    auto p3 = InterpolatePoint(p2, p4, 0.5);
    BezierPoint result[7] = {points[0], p1, p2, p3, p4, p5, points[3]};
    distance = CaculateCubicLength(result, distance, minT, halfT, precision);
    distance = CaculateCubicLength(&result[3], distance, halfT, maxT, precision);
  } else {
    distance += Distance(points[0], points[3]);
  }
  return distance;
}

static bool PointOnLine(const float x1, const float y1, const float x2, const float y2,
                        const float x3, const float y3, const float& precision) {