Compare commits
2 commits
47d3f96b20
...
75d12d6a5a
Author | SHA1 | Date | |
---|---|---|---|
|
75d12d6a5a | ||
|
6744f5e967 |
3 changed files with 32 additions and 37 deletions
|
@ -111,7 +111,12 @@ namespace Boprs
|
|||
|
||||
BooleanOperation bopr = new BooleanOperation(subject, clip, type);
|
||||
|
||||
bopr.Result.Draw();
|
||||
List <Contour> contours = bopr.Result.GetContourCopies();
|
||||
|
||||
foreach (Contour contour in contours)
|
||||
{
|
||||
contour.Draw();
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
|
13
Contour.cs
13
Contour.cs
|
@ -20,17 +20,17 @@ namespace Boprs
|
|||
/// <summary>
|
||||
/// Simple closed polygon.
|
||||
/// </summary>
|
||||
public class Contour
|
||||
public class Contour : ICloneable
|
||||
{
|
||||
/// <summary>
|
||||
/// Depth of the contour within the region.
|
||||
/// </summary>
|
||||
internal int ContourDepth { get; set; }
|
||||
public object Clone()
|
||||
{
|
||||
return new Contour() { Vertices = new List<Point2d>(Vertices) };
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Vertices of the contour.
|
||||
/// </summary>
|
||||
public List<Point2d> Vertices { get; }
|
||||
public List<Point2d> Vertices { get; private set; }
|
||||
|
||||
/// <summary>
|
||||
/// Are the vertices of the contour arranged in clockwise manner?
|
||||
|
@ -70,7 +70,6 @@ namespace Boprs
|
|||
/// </summary>
|
||||
public Contour()
|
||||
{
|
||||
ContourDepth = 0;
|
||||
Vertices = new List<Point2d>();
|
||||
}
|
||||
|
||||
|
|
49
Region.cs
49
Region.cs
|
@ -151,40 +151,33 @@ namespace Boprs
|
|||
// Lexico-graphically sort the vertices.
|
||||
vertices.Sort();
|
||||
|
||||
// Sweepline to keep track of edges.
|
||||
SweepLine sweepLine = new SweepLine();
|
||||
|
||||
bool[] processed = new bool[vertices.Count];
|
||||
List<Contour> contours = new List<Contour>();
|
||||
|
||||
for(int i = 0; i < vertices.Count; i++)
|
||||
{
|
||||
SweepVertex acVx = vertices[i];
|
||||
|
||||
if (acVx.IsLeft())
|
||||
{
|
||||
sweepLine.Add(acVx.Edge, false);
|
||||
}
|
||||
else
|
||||
{
|
||||
sweepLine.Remove(acVx.Edge);
|
||||
}
|
||||
|
||||
// If we already traversed this vertex, skip it.
|
||||
if (processed[i])
|
||||
{
|
||||
continue;
|
||||
}
|
||||
|
||||
// Otherwise this is an edge on an indiscovered contour, create it.
|
||||
Contour contour = new Contour();
|
||||
contours.Add(contour);
|
||||
|
||||
SweepEdge prev = sweepLine.PrevEdge(acVx.Edge);
|
||||
bool shouldBeCW = prev == null ? false : prev.TransitionInside;
|
||||
|
||||
Point2d target = acVx.Point;
|
||||
// acVx should be guaranteed to be the lowest and leftest vertex of the new polygon.
|
||||
// Thus it cannot be vertical.
|
||||
// if it is transition inside, it is a positive contour and should wind counter-clockwise,
|
||||
// if it is transition outside, it is a negative contour and should wind clockwise.
|
||||
SweepVertex acVx = vertices[i];
|
||||
bool shouldBeCW = !acVx.Edge.TransitionInside;
|
||||
|
||||
// Traverse connected edges, and mark taversed vertices as processed,
|
||||
// until we loop back to the first discovered vertex on the contour.
|
||||
int pos = i;
|
||||
processed[i] = true;
|
||||
Point2d target = acVx.Point;
|
||||
contour.Vertices.Add(vertices[pos].Point);
|
||||
acVx.Edge.ParentContour = contour;
|
||||
while (!Utils.DoubleEquals(vertices[pos].OtherVertex().Point.GetDistanceTo(target), 0))
|
||||
|
@ -200,6 +193,7 @@ namespace Boprs
|
|||
}
|
||||
processed[vertices.IndexOf(vertices[pos].OtherVertex())] = true;
|
||||
|
||||
// If the contour is a hole and winds ccw, or positive and winds cw, flip it.
|
||||
if (shouldBeCW != contour.IsClockwise())
|
||||
{
|
||||
contour.Reverse();
|
||||
|
@ -230,7 +224,14 @@ namespace Boprs
|
|||
/// <returns>List of copies of the regions contours.</returns>
|
||||
public List<Contour> GetContourCopies()
|
||||
{
|
||||
throw new NotImplementedException();
|
||||
List<Contour> copies = new List<Contour>();
|
||||
|
||||
foreach (Contour contour in Contours)
|
||||
{
|
||||
copies.Add((Contour)contour.Clone());
|
||||
}
|
||||
|
||||
return copies;
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
|
@ -257,15 +258,5 @@ namespace Boprs
|
|||
|
||||
return region;
|
||||
}
|
||||
|
||||
#if DEBUG
|
||||
internal void Draw()
|
||||
{
|
||||
foreach (Contour contour in Contours)
|
||||
{
|
||||
contour.Draw();
|
||||
}
|
||||
}
|
||||
#endif
|
||||
}
|
||||
}
|
||||
|
|
Loading…
Reference in a new issue