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;
}
/**
* Work out all the open polygond forming a set of infill hatches
*
* @param layerConditions
* @return
*/
public RrPolygonList hatch(LayerRules layerConditions) {
RrPolygonList result = new RrPolygonList();
boolean foundation = layerConditions.getLayingSupport();
Extruder[] es = layerConditions.getPrinter().getExtruders();
for (int i = 0; i < size(); i++) {
Extruder e;
if (foundation) e = es[0]; // Extruder 0 is used for foundations
else e = attribute(i).getExtruder();
result.add(
get(i)
.hatch(
layerConditions.getHatchDirection(e),
layerConditions.getHatchWidth(e),
attribute(i)));
}
return result;
}