Hello all, I need to draw straight lines from A to B and from B to A. Since I need to give each line a different weight, I cannot just draw one line. For now, I'm offsetting the lines perpendicularly by a certain number of pixels so they don't overlap.
To do this, I'm adding the offset to the vertices on each redraw using the context functions for the styles. I'm not sure this is the best place/way to do it, but I couldn't find any callback for redraw(). It works fine except at higher zoom levels, in which the lines unexpectedly disappear. Here is the code: http://jsfiddle.net/G5UDF/6/ (I've tried with versions 2.10, 2.11 and 2.12, same result; tested in Chrome and Firefox) I have read posts about long linestrings disappearing at higher zoom levels because the browser runs out of coordinate space. But the line I'm drawing is not very long, and also, it works fine if I just don't add the offset. In the code you will see that either if I call layer.getDataExtent() before setting the map extent/center or use it to define the map extent, the lines won't disappear. Also, they won't disappear if I just set a fixed value for the resolution (e.g. adding res = 4.77 after res = map.getResolution() to overwrite it), which is very strange. So my questions would be: - Is there a better way to define an offset in pixels for the lines? - Am I doing something wrong that makes the lines disappear? -- View this message in context: http://osgeo-org.1560.n6.nabble.com/Lines-offset-by-x-pixels-disappearing-at-higher-zoom-levels-tp5005365.html Sent from the OpenLayers Users mailing list archive at Nabble.com. _______________________________________________ Users mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/openlayers-users
