Post
by andrew » Wed Dec 02, 2015 10:26 am
Looks like a performance issue.
Here's what happens in detail:
- As soon as you move the mouse cursor into the area of the intersection, QCAD starts looking for intersection points, end points, etc near to the mouse cursor.
- Since the drawing contains polylines with many thousands small segments, the search for an intersection takes very long (several seconds).
- Since QCAD does not immediately return a result, you likely move your mouse cursor in the hope that QCAD will still find the intersection.
- As soon as you move your mouse cursor, QCAD restarts the search since another intersection might now be the closest.
- As this continuous, it appears that QCAD never finds the intersection or end point.
Solutions:
- If the preview is very slow, you can simply click close to the intersection without waiting for a preview to appear. As soon as you click, QCAD searches for the closest snap point, without interrupting when you move the mouse.
- If you want to see a preview of the snap cursor, you would have to hold the mouse still in that place for a long time.
- Simplifying the polylines would of course also help.
