[PATCH] Better linkedness support for relation editor

[Teemu Koskinen <teemu.koskinen@…>]

This patch adds support for forwards/backwards roles in route relations to show the linkedness of the ways. It also skips over any nodes and relations that don't have any ways as members.

If the first way has role forward, only the last node will be considered, and if backward, then only the first node is considered, otherwise both are.

Similarily, if the second way has role forward, only the first node will be considered, and if backward, then only the last node is considered, otherwise both are.

If the member is the last way, or it is a node, or a relation that doesn't contain any ways, then the linkedness column will be empty.

[Teemu Koskinen <teemu.koskinen@…>]

Updated patch

[stoecker]

In r1618.

As you seem to be interested in route relations. Maybe you can make on "order relation" button. The code to draw multipolygons already has a function which joins ways at their end points. Maybe that would be helpful.

[Teemu Koskinen <teemu.koskinen@…>]

Replying to stoecker:

As you seem to be interested in route relations. Maybe you can make on "order relation" button. The code to draw multipolygons already has a function which joins ways at their end points. Maybe that would be helpful.

I've been thinking about that, but it needs some more thought still.

There are few cases that make the ordering difficult:

• circular routes, where to start?
• alternative segments and/or one-way segments
• missing segments

[stoecker]

See the code I mentioned. It has the same problems :-)

• circular ways - use the start way you find first as start way
• alternative segments or missing segments-produce as many linked groups as possible. Let the user do the rest