static BOOL allowed_turn (const RoadMapNeighbour *from_street, int from_direction,
const RoadMapNeighbour *to_street, int to_direction) {
// -1 = shared node; 0 = not shared; 1 = shared node and turn allowed
int from_id1, to_id1, from_id2, to_id2;
int shared_node = -1;
if (from_street->line.square != to_street->line.square)
return 0; //TODO: same line on different squares?
roadmap_square_set_current(from_street->line.square);
roadmap_line_point_ids (from_street->line.line_id, &from_id1, &to_id1);
roadmap_line_point_ids (to_street->line.line_id, &from_id2, &to_id2);
if (from_direction == ROUTE_DIRECTION_WITH_LINE &&
to_direction == ROUTE_DIRECTION_WITH_LINE &&
to_id1 == from_id2)
shared_node = to_id1;
else if (from_direction == ROUTE_DIRECTION_WITH_LINE &&
to_direction == ROUTE_DIRECTION_AGAINST_LINE &&
to_id1 == to_id2)
shared_node = to_id1;
else if (from_direction == ROUTE_DIRECTION_AGAINST_LINE &&
to_direction == ROUTE_DIRECTION_WITH_LINE &&
from_id1 == from_id2)
shared_node = from_id1;
else if (from_direction == ROUTE_DIRECTION_AGAINST_LINE &&
to_direction == ROUTE_DIRECTION_AGAINST_LINE &&
from_id1 == to_id2)
shared_node = from_id1;
if (shared_node != -1) {
if (!roadmap_turns_find_restriction(shared_node, from_street->line.line_id, to_street->line.line_id))
return 1;
else
return -1;
}
return 0;
}
int editor_line_copy (PluginLine *line, int street) {
editor_line_copy_points copy_points;
RoadMapPosition from_pos;
RoadMapPosition to_pos;
int trkseg;
int from_point;
int to_point;
int line_id;
int direction;
int id_from;
int id_to;
// collect shape points for trkseg
roadmap_plugin_line_from (line, ©_points.last_position);
copy_points.first_shape = -1;
copy_points.last_shape = -1;
// we assume that in case of a line broken because of tiles,
// we begin with the original "from" segment
handle_segment (line, ©_points, FLAG_EXTEND_TO);
roadmap_street_extend_line_ends (line, &from_pos, &to_pos, FLAG_EXTEND_TO,
handle_segment, ©_points);
if (line->plugin_id == EditorPluginID) {
editor_line_get_points (line->line_id, &from_point, &to_point);
} else {
roadmap_square_set_current (line->square);
roadmap_line_point_ids (line->line_id, &id_from, &id_to);
from_point = editor_point_add (&from_pos, id_from);
to_point = editor_point_add (&to_pos, id_to);
}
trkseg = editor_trkseg_add (-1, -1, from_point,
copy_points.first_shape, copy_points.last_shape,
-1, -1, ED_TRKSEG_FAKE);
direction = roadmap_plugin_get_direction (line, ROUTE_DIRECTION_ANY);
line_id = editor_line_add (from_point, to_point, trkseg, line->cfcc, direction, street, ED_LINE_DIRTY);
return line_id;
}