private void AppendTravel(Vector2d startPt, Vector2d endPt)
{
double travelDistance = startPt.Distance(endPt);
// a travel may require a retract, which we might want to skip
if (ExtrudeOnShortTravels &&
travelDistance < ShortTravelDistance)
{
Builder.AppendExtrude(endPt, Settings.RapidTravelSpeed);
}
else if (Settings.TravelLiftEnabled &&
travelDistance > Settings.TravelLiftDistanceThreshold)
{
Builder.AppendZChange(Settings.TravelLiftHeight, Settings.ZTravelSpeed, ToolpathTypes.Travel);
Builder.AppendTravel(endPt, Settings.RapidTravelSpeed);
Builder.AppendZChange(-Settings.TravelLiftHeight, Settings.ZTravelSpeed, ToolpathTypes.Travel);
}
else
{
Builder.AppendTravel(endPt, Settings.RapidTravelSpeed);
}
}
/// <summary>
/// This is the main driver of the slicing process
/// </summary>
protected virtual void generate_result()
{
// should be parameterizable? this is 45 degrees... (is it? 45 if nozzlediam == layerheight...)
//double fOverhangAllowance = 0.5 * settings.NozzleDiamMM;
OverhangAllowanceMM = Settings.LayerHeightMM / Math.Tan(45 * MathUtil.Deg2Rad);
// initialize compiler and get start nozzle position
Compiler.Begin();
// We need N above/below shell paths to do roof/floors, and *all* shells to do support.
// Also we can compute shells in parallel. So we just precompute them all here.
precompute_shells();
int nLayers = Slices.Count;
// Now generate paths for each layer.
// This could be parallelized to some extent, but we have to pass per-layer paths
// to Scheduler in layer-order. Probably better to parallelize within-layer computes.
for (int layer_i = 0; layer_i < nLayers; ++layer_i)
{
BeginLayerF(layer_i);
// make path-accumulator for this layer
ToolpathSetBuilder paths = new ToolpathSetBuilder();
// TODO FIX
//paths.Initialize(Compiler.NozzlePosition);
paths.Initialize((double)(layer_i) * Settings.LayerHeightMM * Vector3d.AxisZ);
// layer-up (ie z-change)
paths.AppendZChange(Settings.LayerHeightMM, Settings.ZTravelSpeed);
// rest of code does not directly access path builder, instead if
// sends paths to scheduler.
SequentialScheduler2d scheduler = new SequentialScheduler2d(paths, Settings);
// a layer can contain multiple disjoint regions. Process each separately.
List <ShellsFillPolygon> layer_shells = LayerShells[layer_i];
for (int si = 0; si < layer_shells.Count; si++)
{
// schedule shell paths that we pre-computed
ShellsFillPolygon shells_gen = layer_shells[si];
scheduler.AppendCurveSets(shells_gen.Shells);
// all client to do configuration (eg change settings for example)
BeginShellF(shells_gen, ShellTags.Get(shells_gen));
// solid fill areas are inner polygons of shell fills
List <GeneralPolygon2d> solid_fill_regions = shells_gen.InnerPolygons;
// fill solid regions
foreach (GeneralPolygon2d solid_poly in solid_fill_regions)
{
fill_solid_region(layer_i, solid_poly, scheduler, false);
}
}
// resulting paths for this layer (Currently we are just discarding this after compiling)
ToolpathSet layerPaths = paths.Paths;
// compile this layer
Compiler.AppendPaths(layerPaths);
}
Compiler.End();
}