On 11/03/2011 08:44 AM, Martin Ždila wrote: > Hello > > I'd like to create a MapCSS for hiking trails. In our country we use 4 > colours to mark hiking trails. Some ways may be parts of multiple > trails. What I want is to draw parallel lines to such ways but not > with fixed offset for each color. > > I found that offset style must be an absolute value and so I need to > specify offset for all color combinations like this: > > relation[osmc:symbol^=red] > way::redLayer { color: red; offset: 5 } > relation[osmc:symbol^=green] > way::greenLayer { color: green; offset: 5 } > relation[osmc:symbol^=blue] > way::blueLayer { color: blue; offset: 5 } > relation[osmc:symbol^=yellow] > way::yellowLayer { color: yellow; offset: 5 } > > /* Following rules should override previous per layer: */ > /* Following uses unsupported syntax: */ > > relation[osmc:symbol^=red & osmc:symbol^=green ] > way::greenLayer { > offset: 10 } > relation[osmc:symbol^=red & osmc:symbol^=blue ] > way::greenBlue { offset: 10 > } > relation[osmc:symbol^=red & osmc:symbol^=yellow ] > way::greenYellow { > offset: 10 } > > ... and many other combinations > > Is there a way to write it in some supported syntax? Or is there some > different way to render marked trails as I described?
Hi Martin, try this [1]. Eval is no fun at the moment, because there is so little debugging output, but it should work. Paul [1] relation[osmc:symbol^=red] > way { red: true; } relation[osmc:symbol^=blue] > way { blue: true; } relation[osmc:symbol^=green] > way { green: true; } way::red_layer { offset: 0; } way[prop("red","default")]::red_layer { color: red; width: 3; offset: 5; } way::blue_layer { offset: prop("offset","red_layer"); } way[prop("blue","default")]::blue_layer { color: blue; width: 3; offset: prop("offset","red_layer") + 5; } way::green_layer { offset: prop("offset","blue_layer"); } way[prop("green","default")]::green_layer { color: green; width: 3; offset: prop("offset","blue_layer") + 5; } _______________________________________________ josm-dev mailing list josm-dev@openstreetmap.org http://lists.openstreetmap.org/listinfo/josm-dev