Add more convenience functions

1 files changed, 15 insertions, 0 deletions

diff --git a/sigmodr/widgets/mapeditor/WorldMapPlacement.cpp b/sigmodr/widgets/mapeditor/WorldMapPlacement.cpp
index 6f603f7d..e8a502fa 100644
--- a/sigmodr/widgets/mapeditor/WorldMapPlacement.cpp
+++ b/sigmodr/widgets/mapeditor/WorldMapPlacement.cpp
@@ -107,11 +107,26 @@ static Corner convexTurnDirection(const QPoint& previous, const QPoint& current,
     return Invalid;
 }
 
+template<typename T> static bool same(const T& a, const T& b, const T& c)
+{
+    return ((a == b) && (b == c));
+}
+
+static bool collinear(const QPoint& a, const QPoint& b, const QPoint& c)
+{
+    return (same(a.x(), b.x(), c.x()) || same(a.y(), b.y(), c.y()));
+}
+
 template<typename T> static bool between(const T& middle, const T& end1, const T& end2)
 {
     return (qMin(end1, end2) < middle) && (middle < qMax(end1, end2));
 }
 
+static bool inOrder(const QPoint& end1, const QPoint& center, const QPoint& end2)
+{
+    return (collinear(center, end1, end2) && (between(center.y(), end1.y(), end2.y()) || between(center.x(), end1.x(), end2.x())));
+}
+
 static CollisionInfo findCollisions(const QPolygon& polygon1, const QPolygon& polygon2)
 {
     CollisionInfo data;