/**
* Looks if at the input position ends a trace with the input net number, which has no normal
* contact at that position. Returns null, if no tail is found.
*/
public Trace get_trace_tail(Point p_location, int p_layer, int[] p_net_no_arr) {
TileShape point_shape = TileShape.get_instance(p_location);
Collection<SearchTreeObject> found_items = overlapping_objects(point_shape, p_layer);
Iterator<SearchTreeObject> it = found_items.iterator();
while (it.hasNext()) {
SearchTreeObject curr_ob = it.next();
if (curr_ob instanceof Trace) {
Trace curr_trace = (Trace) curr_ob;
if (!curr_trace.nets_equal(p_net_no_arr)) {
continue;
}
if (curr_trace.first_corner().equals(p_location)) {
Collection<Item> contacts = curr_trace.get_start_contacts();
if (contacts.size() == 0) {
return curr_trace;
}
}
if (curr_trace.last_corner().equals(p_location)) {
Collection<Item> contacts = curr_trace.get_end_contacts();
if (contacts.size() == 0) {
return curr_trace;
}
}
}
}
return null;
}
/**
* Checks, if p_item item is part of a cycle and remuve it together with its connection in this
* case.
*/
public boolean remove_if_cycle(Trace p_trace) {
if (!p_trace.is_on_the_board()) {
return false;
}
if (!p_trace.is_cycle()) {
return false;
}
// Remove tails at the endpoints after removing the cycle,
// if there was no tail before.
boolean[] tail_at_endpoint_before = null;
Point[] end_corners = null;
int curr_layer = p_trace.get_layer();
int[] curr_net_no_arr = p_trace.net_no_arr;
end_corners = new Point[2];
end_corners[0] = p_trace.first_corner();
end_corners[1] = p_trace.last_corner();
tail_at_endpoint_before = new boolean[2];
for (int i = 0; i < 2; ++i) {
Trace tail = get_trace_tail(end_corners[i], curr_layer, curr_net_no_arr);
tail_at_endpoint_before[i] = (tail != null);
}
Set<Item> connection_items = p_trace.get_connection_items();
this.remove_items(connection_items, false);
for (int i = 0; i < 2; ++i) {
if (!tail_at_endpoint_before[i]) {
Trace tail = get_trace_tail(end_corners[i], curr_layer, curr_net_no_arr);
if (tail != null) {
remove_items(tail.get_connection_items(), false);
}
}
}
return true;
}
Point normal_contact_point(Trace p_other) {
if (this.layer != p_other.layer) {
return null;
}
boolean contact_at_first_corner =
this.first_corner().equals(p_other.first_corner())
|| this.first_corner().equals(p_other.last_corner());
boolean contact_at_last_corner =
this.last_corner().equals(p_other.first_corner())
|| this.last_corner().equals(p_other.last_corner());
Point result;
if (!(contact_at_first_corner || contact_at_last_corner)
|| contact_at_first_corner && contact_at_last_corner) {
// no contact point or more than 1 contact point
result = null;
} else if (contact_at_first_corner) {
result = this.first_corner();
} else // contact at last corner
{
result = this.last_corner();
}
return result;
}
/**
* Maybe trace of type turret without net in Mentor design. Try to assig the net by calculating
* the overlaps.
*/
private void try_correct_net(Item p_item) {
if (!(p_item instanceof Trace)) {
return;
}
Trace curr_trace = (Trace) p_item;
java.util.Set<Item> contacts = curr_trace.get_normal_contacts(curr_trace.first_corner(), true);
contacts.addAll(curr_trace.get_normal_contacts(curr_trace.last_corner(), true));
int corrected_net_no = 0;
for (Item curr_contact : contacts) {
if (curr_contact.net_count() == 1) {
corrected_net_no = curr_contact.get_net_no(0);
break;
}
}
if (corrected_net_no != 0) {
p_item.assign_net_no(corrected_net_no);
}
}
/**
* Get a list of all items having a connection point at p_point on the layer of this trace. If
* p_ignore_net is false, only contacts to items sharing a net with this trace are calculated.
* This is the normal case.
*
* @param p_point a {@link geometry.planar.Point} object.
* @param p_ignore_net a boolean.
* @return a {@link java.util.Set} object.
*/
public Set<Item> get_normal_contacts(Point p_point, boolean p_ignore_net) {
if (p_point == null
|| !(p_point.equals(this.first_corner()) || p_point.equals(this.last_corner()))) {
return new TreeSet<Item>();
}
TileShape search_shape = TileShape.get_instance(p_point);
Set<SearchTreeObject> overlaps = board.overlapping_objects(search_shape, this.layer);
Set<Item> result = new TreeSet<Item>();
for (SearchTreeObject curr_ob : overlaps) {
if (!(curr_ob instanceof Item)) {
continue;
}
Item curr_item = (Item) curr_ob;
if (curr_item != this
&& curr_item.shares_layer(this)
&& (p_ignore_net || curr_item.shares_net(this))) {
if (curr_item instanceof Trace) {
Trace curr_trace = (Trace) curr_item;
if (p_point.equals(curr_trace.first_corner())
|| p_point.equals(curr_trace.last_corner())) {
result.add(curr_item);
}
} else if (curr_item instanceof DrillItem) {
DrillItem curr_drill_item = (DrillItem) curr_item;
if (p_point.equals(curr_drill_item.get_center())) {
result.add(curr_item);
}
} else if (curr_item instanceof ConductionArea) {
ConductionArea curr_area = (ConductionArea) curr_item;
if (curr_area.get_area().contains(p_point)) {
result.add(curr_item);
}
}
}
}
return result;
}
