+int scredge_is_horizontal(ScrEdge *se)
+{
+ return (se->v1->vec.y == se->v2->vec.y);
+}
+
+ScrEdge *screen_find_active_scredge(bScreen *sc, int mx, int my)
+{
+ ScrEdge *se;
+
+ for (se= sc->edgebase.first; se; se= se->next) {
+ if (scredge_is_horizontal(se)) {
+ short min, max;
+ min= MIN2(se->v1->vec.x, se->v2->vec.x);
+ max= MAX2(se->v1->vec.x, se->v2->vec.x);
+
+ if (abs(my-se->v1->vec.y)<=2 && mx>=min && mx<=max)
+ return se;
+ }
+ else {
+ short min, max;
+ min= MIN2(se->v1->vec.y, se->v2->vec.y);
+ max= MAX2(se->v1->vec.y, se->v2->vec.y);
+
+ if (abs(mx-se->v1->vec.x)<=2 && my>=min && my<=max)
+ return se;
+ }
+ }
+
+ return NULL;
+}
+
+
+