29 const Point &pointStop)
31 double xProjection, yProjection, projectedDistanceOutsideLine, distanceToLine;
41 &projectedDistanceOutsideLine,
45 bool distancesAreEqual = (qAbs (distanceToLine - m_minimumDistanceToLine) <= 0);
46 if (!m_haveMinimumDistanceToLine ||
47 (distanceToLine < m_minimumDistanceToLine) ||
48 (distancesAreEqual && projectedDistanceOutsideLine < m_minimumProjectedDistanceOutsideLine)) {
51 if (qAbs (projectedDistanceOutsideLine) <= 0) {
59 double distanceProjectionToStart = qSqrt ((xProjection - pointStart.
posScreen().x()) * (xProjection - pointStart.
posScreen().x()) +
60 (yProjection - pointStart.
posScreen().y()) * (yProjection - pointStart.
posScreen().y()));
61 double distanceProjectionToStop = qSqrt ((xProjection - pointStop.
posScreen().x()) * (xProjection - pointStop.
posScreen().x()) +
62 (yProjection - pointStop.
posScreen().y()) * (yProjection - pointStop.
posScreen().y()));
63 if (distanceProjectionToStart < distanceProjectionToStop) {
66 m_ordinal = pointStart.
ordinal() - 0.5;
71 m_ordinal = pointStop.
ordinal() + 0.5;
76 m_haveMinimumDistanceToLine =
true;
77 m_minimumDistanceToLine = distanceToLine;
78 m_minimumProjectedDistanceOutsideLine = projectedDistanceOutsideLine;
void projectPointOntoLine(double xToProject, double yToProject, double xStart, double yStart, double xStop, double yStop, double *xProjection, double *yProjection, double *projectedDistanceOutsideLine, double *distanceToLine)
Find the projection of a point onto a line segment such that the line through the point and its proje...