protected virtual ElementLocation FindLoopEntryPoint(FillLoop poly, Vector2d currentPos2)
{
int startIndex;
if (Settings.Part.ZipperAlignedToPoint && poly.FillType.IsEntryLocationSpecified())
{
// split edges to position zipper closer to the desired point?
// TODO: Enter midsegment
Vector2d zipperLocation = new Vector2d(Settings.Part.ZipperLocationX, Settings.Part.ZipperLocationY);
startIndex = CurveUtils2.FindNearestVertex(zipperLocation, poly.Vertices(true));
}
else if (Settings.Part.ShellRandomizeStart && poly.FillType.IsEntryLocationSpecified())
{
// split edges for a actual random location along the perimeter instead of a random vertex?
Random rnd = new Random();
startIndex = rnd.Next(poly.ElementCount);
}
else
{
// use the vertex closest to the current nozzle position
startIndex = CurveUtils2.FindNearestVertex(currentPos2, poly.Vertices(true));
}
return(new ElementLocation(startIndex, 0));
}
protected virtual void BuildLoop(FillLoop loop, double useSpeed)
{
if (!(loop is FillLoop <FillSegment> o))
{
throw new NotImplementedException($"FillPathScheduler2d does not support type {loop.GetType()}.");
}
BuildLoopConcrete(o, useSpeed);
}
protected virtual FillLoop SelectLoopDirection(FillLoop loop)
{
if (loop.IsHoleShell != loop.IsClockwise())
{
return(loop.Reversed());
}
return(loop);
}
// [TODO] no reason we couldn't start on edge midpoint??
public virtual void AppendFillLoop(FillLoop loop)
{
AssertValidLoop(loop);
var oriented = SelectLoopDirection(loop);
var rolled = SelectLoopEntry(oriented, Builder.Position.xy);
AppendTravel(Builder.Position.xy, rolled.Entry);
double useSpeed = SelectSpeed(rolled);
BuildLoop(rolled, useSpeed);
}
protected void AssertValidLoop(FillLoop curve)
{
int N = curve.ElementCount;
if (N < 2)
{
StackFrame frame = new StackFrame(1);
var method = frame.GetMethod();
var type = method.DeclaringType;
var name = method.Name;
throw new ArgumentException($"{type}.{name}: degenerate loop; must have at least 2 edges");
}
}
public void Append(FillLoop loop)
{
Loops.Add(loop);
}
protected virtual FillLoop SelectLoopEntry(FillLoop loop, Vector2d currentPosition)
{
var location = FindLoopEntryPoint(loop, currentPosition);
return(loop.RollBetweenVertices(location));
}
protected virtual void BuildLoopConcrete <TSegment>(FillLoop <TSegment> rolled, double useSpeed) where TSegment : IFillSegment, new()
{
Builder.AppendExtrude(rolled.Vertices(true).ToList(), useSpeed, rolled.FillType, null);
}