public static Polygons GetExtrusionPolygonsForLayer(this string[] layerGCode, ref MovementInfo movementInfo, bool validateOverlaps = true)
{
var foundPolygons = new Polygons();
bool extruding = false;
int movementCount = 0;
double movementAmount = double.MaxValue / 2; // always add a new extrusion the first time
MovementInfo lastMovement = movementInfo;
MovementInfo lastLastMovement = movementInfo;
foreach (MovementInfo currentMovement in TestUtilities.GetLayerMovements(layerGCode, lastMovement))
{
bool isRetraction = currentMovement.extrusion != lastMovement.extrusion && (currentMovement.position == lastLastMovement.position);
bool isZLift = currentMovement.position.x == lastLastMovement.position.x && currentMovement.position.y == lastLastMovement.position.y && currentMovement.position.z != lastLastMovement.position.z;
bool isExtrude = !isRetraction && !isZLift && currentMovement.extrusion != lastMovement.extrusion;
if (extruding)
{
if (isExtrude)
{
// add to the extrusion
foundPolygons[foundPolygons.Count - 1].Add(new IntPoint(
(long)(currentMovement.position.x * 1000),
(long)(currentMovement.position.y * 1000),
(long)(currentMovement.position.z * 1000)));
}
else
{
// we are switching so add in the point to the last extrude
extruding = false;
movementAmount = 0;
if (foundPolygons[foundPolygons.Count - 1].Count == 1)
{
foundPolygons[foundPolygons.Count - 1].Add(new IntPoint(
(long)(lastLastMovement.position.x * 1000),
(long)(lastLastMovement.position.y * 1000),
(long)(lastLastMovement.position.z * 1000)));
}
}
}
else // not extruding
{
if (isExtrude)
{
if (movementAmount >= 0)
{
// starting a new extrusion
foundPolygons.Add(new Polygon());
}
foundPolygons[foundPolygons.Count - 1].Add(new IntPoint(
(long)(currentMovement.position.x * 1000),
(long)(currentMovement.position.y * 1000),
(long)(currentMovement.position.z * 1000)));
extruding = true;
}
else // do nothing waiting for extrude
{
movementAmount += (currentMovement.position - lastMovement.position).Length;
}
}
lastLastMovement = lastMovement;
lastMovement = currentMovement;
movementCount++;
}
for (int i = foundPolygons.Count - 1; i >= 0; i--)
{
if (!extruding && foundPolygons[i].Count == 1)
{
foundPolygons.RemoveAt(i);
}
else if (foundPolygons[foundPolygons.Count - 1].Count == 1)
{
foundPolygons[foundPolygons.Count - 1].Add(new IntPoint(
(long)(lastLastMovement.position.x * 1000),
(long)(lastLastMovement.position.y * 1000),
(long)(lastLastMovement.position.z * 1000)));
break;
}
}
movementInfo = lastMovement;
// validate that the polygons do not double extrude
if (validateOverlaps)
{
Assert.IsFalse(HasOverlapingSegments(foundPolygons));
}
return(foundPolygons);
}