static double SegmentPosition(SegmentBase segment, Directions direction) {
return direction == Directions.North ? segment.Start.X : -segment.Start.Y;
}
static internal bool SegmentsIntersect(SegmentBase first, SegmentBase second, out Point intersect) {
return IntervalsIntersect(first.Start, first.End, second.Start, second.End, out intersect);
}
static internal Point SegmentIntersection(SegmentBase first, SegmentBase second) {
// Caller expects segments to intersect.
Point intersect;
if (!SegmentsIntersect(first, second, out intersect)) {
Debug.Assert(false, "intersect is not on both segments");
}
return intersect;
}
static internal Point SegmentIntersection(SegmentBase seg, Point from) {
return SegmentIntersection(seg.Start, seg.End, from);
}
static internal bool SegmentsIntersect(SegmentBase first, SegmentBase second) {
Point intersect;
return SegmentsIntersect(first, second, out intersect);
}
static internal bool IsVertical(SegmentBase seg) {
return IsVertical(PointComparer.GetPureDirection(seg.Start, seg.End));
}
static internal double Slope(SegmentBase seg, ScanDirection scanDir) {
return Slope(seg.Start, seg.End, scanDir);
}
static internal bool PointIsOnSegmentInterior(SegmentBase seg, Point test) {
return PointIsOnSegmentInterior(seg.Start, seg.End, test);
}
static internal bool IntervalsAreCollinear(SegmentBase first, SegmentBase second) {
return IntervalsAreCollinear(first.Start, first.End, second.Start, second.End);
}
static internal bool IntervalsOverlap(SegmentBase first, SegmentBase second) {
return IntervalsOverlap(first.Start, first.End, second.Start, second.End);
}
internal bool IsPerpendicular(SegmentBase seg) {
return IsPerpendicular(seg.Start, seg.End);
}
internal bool IsFlat(SegmentBase seg) {
return IsFlat(seg.Start, seg.End);
}