public BooleanGridList offset(LayerRules lc, boolean outline) {
boolean foundation = lc.getLayingSupport();
if (outline && foundation) Debug.e("Offsetting a foundation outline!");
BooleanGridList result = new BooleanGridList();
for (int i = 0; i < size(); i++) {
Attributes att = attribute(i);
if (att == null) Debug.e("BooleanGridList.offset(): null attribute!");
else {
Extruder[] es = lc.getPrinter().getExtruders();
Extruder e;
int shells;
if (foundation) {
e = es[0]; // By convention extruder 0 builds the foundation
shells = 1;
} else {
e = att.getExtruder();
shells = e.getShells();
}
if (outline) {
for (int shell = 0; shell < shells; shell++)
result.add(get(i).offset(-((double) shell + 0.5) * e.getExtrusionSize()), att);
} else {
// Must be a hatch. Only do it if the gap is +ve or we're building the foundation
double offSize;
if (foundation) offSize = 3;
else offSize = -((double) shells + 0.5) * e.getExtrusionSize() + e.getInfillOverlap();
if (e.getExtrusionInfillWidth() > 0 || foundation) // Z valuesn't mattere here
result.add(get(i).offset(offSize), att);
}
}
}
return result;
}
/**
* Make a list with a single entry: the union of all the entries. Set its attributes to that of
* extruder 0 in the extruder list.
*
* @param a
* @return
*/
public BooleanGridList union(Extruder[] es) {
BooleanGridList result = new BooleanGridList();
if (size() <= 0) return result;
BooleanGrid contents = get(0);
Attributes att = attribute(0);
Boolean foundAttribute0 = false;
if (att.getExtruder() == es[0]) foundAttribute0 = true;
for (int i = 1; i < size(); i++) {
if (!foundAttribute0) {
if (attribute(i).getExtruder() == es[0]) {
att = attribute(i);
foundAttribute0 = true;
}
}
contents = BooleanGrid.union(contents, get(i));
}
if (!foundAttribute0) Debug.e("RrCSGPolygonList.union(): Attribute of extruder 0 not found.");
result.add(contents, att);
return result;
}
/**
* Add another list of shapes on the end
*
* @param a
*/
public void add(BooleanGridList aa) {
for (int i = 0; i < a.size(); i++) add(aa.get(i), aa.attribute(i));
}