//tries to subtract the other slice from this slice
//returns null if this subtraction can be integrated into this slice
//returns another slice if the subtraction would break this slice in two
public Slice Subtract(Slice other)
{
if (other.Contains(GetVector(extent)) && other.Contains(GetVector(-extent)))
{
//our slice is entirely within the other slice, delete us!
extent = 0;
return(null);
}
if (Contains(other.GetVector(other.extent)) && Contains(-other.GetVector(other.extent)))
{
//we entirely contain the other slice, so we're getting cut in half!
}
}
public void TestContainsReturnsFalseWhenEqualItemNotInSlice()
{
var list = new[] { 0, 1, 2, 3, 4 };
var slice = new Slice <int>(list, 2, 2);
var actual = slice.Contains(0);
Assert.IsFalse(actual);
}
private void AddRoutPoint(Slice currentPolygon, Vector3 newPoint, bool check = true)
{
if (routs.Count == 0)
{
routs.Add(new LineStrip());
}
LineStrip currentRout = routs[routs.Count - 1];
if (check)
{
if (currentRout.Vertices.Count > 0)
{
Slice larger = new Slice(currentPolygon);
larger.Offset(toolRadius * 1.05f);
Vector3 lastPoint = currentRout.Vertices[currentRout.Vertices.Count - 1];
LineStrip path = new LineStrip();
path.Append(lastPoint);
path.Append(newPoint);
Slice test = new Slice(path, toolRadius * 2.0f, currentPolygon.Plane);
if (!larger.Contains(test))
{
// Can't move at this level - need to go to the save Z move height.
currentRout = new LineStrip();
routs.Add(currentRout);
//DrawSlice(Color.Black, Color.Red, test);
}
else
{
//DrawSlice(Color.Black, Color.Green, test);
}
//larger.Subtract(test);
//GL.Translate(0, 0, 100);
}
}
// If the Z height changed, move to the new position and and drop, or rise and then move.
if (currentRout.Vertices.Count > 0)
{
var lastPoint = currentRout.Vertices[currentRout.Vertices.Count - 1];
if (newPoint.Z < lastPoint.Z)
{
currentRout.Vertices.Add(new Vector3(newPoint.X, newPoint.Y, lastPoint.Z));
}
else if (newPoint.Z > lastPoint.Z)
{
currentRout.Vertices.Add(new Vector3(lastPoint.X, lastPoint.Y, newPoint.Z));
}
}
currentRout.Vertices.Add(newPoint);
}
public bool Contains(Slice p)
{
return(topPolygon.Contains(p));
}