/// <summary>
/// Add a polygon ring to the geometry and make it a hole.
/// </summary>
/// <remarks>
/// WARNING: This works for convex polygons, but not for non-convex regions in general.
/// </remarks>
/// <param name="points">List of points which make up the hole.</param>
/// <param name="mark">Common boundary mark for all segments of the hole.</param>
public static void AddRingAsHole(this InputGeometry geometry, IEnumerable<TriangleNet.Geometry.Point> points, int mark = 0)
{
// Save the current number of points.
int N = geometry.Count;
int m = 0;
foreach (var pt in points)
{
geometry.AddPoint(pt.X, pt.Y, pt.Boundary, pt.Attributes);
m++;
}
for (int i = 0; i < m; i++)
{
geometry.AddSegment(N + i, N + ((i + 1) % m), mark);
}
//a lényeg az hogy kell egy a lyukon lévő pont,hogy jelezze hogy az egy lyuk poligon... a legegyszerübb trükk a következő, az egybefüggő (akár konkáv) poligont háromszögesítem, ezzel nincs gond, ezután kiválasztok egy testzőleges háromszöget, és veszem annak a középpontját..ez már tuti hogy a nagy poligon belső pontja
TriangleNetMesh mesh = new TriangleNetMesh();
var inputGeometry = new InputGeometry();
inputGeometry.AddRing(points);
mesh.Triangulate(inputGeometry);
var firstTriangle = new List<Triangle>(mesh.Triangles)[0];
double x = 0.0;
double y = 0.0;
for (int iii = 0; iii < 3; iii++)
{
var vertex = firstTriangle.GetVertex(iii);
x += vertex.X;
y += vertex.Y;
}
geometry.AddHole(x / 3, y / 3);
}
private void RecalculateVertices()
{
if (points.Count < 2)
{
return;
}
vertexPositionColorArray = null;
var lineColor = Color.Red;
#region clipper
List<IntPoint> clipperPath = new List<IntPoint>(points.Count);
foreach (var point in points)
{
clipperPath.Add(new IntPoint(point.X * ClipperScale, point.Y * ClipperScale));
}
List<List<IntPoint>> clipperSolution = new List<List<IntPoint>>();
ClipperOffset clipperOffset = new ClipperOffset();
clipperOffset.AddPath(clipperPath, JoinType.jtRound, EndType.etOpenRound);
clipperOffset.Execute(ref clipperSolution, lineThickness / 2.0f * ClipperScale);
#endregion
#region triangle.net
InputGeometry InputGeometry = new InputGeometry();
Mesh TriangleMesh = new Mesh();
for (int iii = 0; iii < clipperSolution.Count; iii++)
{
var trianglePath = clipperSolution[iii].Select(p => new TrianglePoint(p.X / (float)ClipperScale, p.Y / (float)ClipperScale)).ToList();
if (iii == 0)
{
InputGeometry.AddRing(trianglePath);
}
else
{
InputGeometry.AddRingAsHole(trianglePath);
}
}
#endregion
if (InputGeometry.Count > 0)
{
TriangleMesh.Triangulate(InputGeometry);
vertexPositionColorArray = TriangleMesh.GetTriangleList().Select(v => new VertexPositionColor(new Vector3((float)v.X, (float)v.Y, 0.0f), lineColor)).ToArray();
vertexBuffer = new VertexBuffer(GraphicsDevice, VertexPositionColor.VertexDeclaration, vertexPositionColorArray.Length, BufferUsage.WriteOnly);
vertexBuffer.SetData<VertexPositionColor>(vertexPositionColorArray);
}
}
// Use this for initialization
void Start ()
{
Map = new GameMap();
Map.TerrainData = LowPolyTerrainData.GetRandomMap();
var building = new Building();
building.Positions.Add(new Vector2Int(6, 1));
building.Positions.Add(new Vector2Int(7, 1));
building.Positions.Add(new Vector2Int(8, 1));
building.Positions.Add(new Vector2Int(9, 1));
building.Positions.Add(new Vector2Int(10, 1));
building.Positions.Add(new Vector2Int(11, 1));
building.Positions.Add(new Vector2Int(12, 1));
building.Positions.Add(new Vector2Int(13, 1));
building.Positions.Add(new Vector2Int(14, 1));
building.Positions.Add(new Vector2Int(11, 2));
building.Positions.Add(new Vector2Int(12, 2));
building.Positions.Add(new Vector2Int(12, 3));
building.Positions.Add(new Vector2Int(13, 3));
building.Positions.Add(new Vector2Int(13, 4));
building.Positions.Add(new Vector2Int(14, 4));
building.Positions.Add(new Vector2Int(14, 5));
building.Positions.Add(new Vector2Int(15, 5));
building.RemoveTrees(Map.TerrainData);
//Map.Buildings.Add(building);
building = new Building();
//building.Positions.Add(new Vector2Int(6, 2));
building.Positions.Add(new Vector2Int(7, 2));
building.Positions.Add(new Vector2Int(8, 2));
building.Positions.Add(new Vector2Int(9, 2));
building.Positions.Add(new Vector2Int(10, 2));
building.Positions.Add(new Vector2Int(5, 3));
building.Positions.Add(new Vector2Int(6, 3));
building.Positions.Add(new Vector2Int(7, 3));
building.Positions.Add(new Vector2Int(8, 3));
building.Positions.Add(new Vector2Int(9, 3));
building.Positions.Add(new Vector2Int(10, 3));
building.Positions.Add(new Vector2Int(11, 3));
//building.Positions.Add(new Vector2Int(5, 4));
building.Positions.Add(new Vector2Int(6, 4));
building.Positions.Add(new Vector2Int(7, 4));
building.Positions.Add(new Vector2Int(8, 4));
building.Positions.Add(new Vector2Int(9, 4));
building.Positions.Add(new Vector2Int(10, 4));
building.Positions.Add(new Vector2Int(11, 4));
building.Positions.Add(new Vector2Int(10, 6));
building.Positions.Add(new Vector2Int(11, 6));
building.Positions.Add(new Vector2Int(12, 6));
building.Type = "house";
building.RemoveTrees(Map.TerrainData);
//Map.Buildings.Add(building);
building = new Building();
var floor = new BuildingFloor();
floor.Positions.Add(new Vector2Int(13, 2));
floor.Positions.Add(new Vector2Int(14, 2));
floor.Positions.Add(new Vector2Int(15, 2));
floor.Positions.Add(new Vector2Int(16, 2));
floor.Positions.Add(new Vector2Int(14, 3));
floor.Positions.Add(new Vector2Int(15, 3));
floor.Positions.Add(new Vector2Int(16, 3));
floor.WallEdges.Add(new WallEdge(new Vector2Int(13, 2), 2));
floor.WallEdges.Add(new WallEdge(new Vector2Int(13, 2), 0));
floor.BaseHeight = 20.0f;
floor.FloorHeight = 0.2f;
floor.Height = 10.0f;
floor.Map = Map;
building.Floors.Add(floor);
floor = new BuildingFloor();
floor.Positions.Add(new Vector2Int(14, 2));
floor.Positions.Add(new Vector2Int(15, 2));
floor.Positions.Add(new Vector2Int(16, 2));
floor.Positions.Add(new Vector2Int(14, 3));
floor.Positions.Add(new Vector2Int(15, 3));
floor.Positions.Add(new Vector2Int(16, 3));
floor.WallEdges.Add(new WallEdge(new Vector2Int(14, 2), 2));
floor.WallEdges.Add(new WallEdge(new Vector2Int(15, 2), 2));
floor.BaseHeight = 30.0f;
floor.FloorHeight = 0.2f;
floor.Height = 10.0f;
floor.Map = Map;
building.Floors.Add(floor);
floor = new BuildingFloor();
floor.Positions.Add(new Vector2Int(15, 4));
floor.Positions.Add(new Vector2Int(16, 4));
floor.Positions.Add(new Vector2Int(17, 4));
floor.Positions.Add(new Vector2Int(17, 3));
floor.Positions.Add(new Vector2Int(18, 3));
floor.WallEdges.Add(new WallEdge(new Vector2Int(15, 4), 0));
floor.WallEdges.Add(new WallEdge(new Vector2Int(16, 4), 0));
floor.WallEdges.Add(new WallEdge(new Vector2Int(17, 4), 1, 2));
floor.BaseHeight = 22.0f;
floor.FloorHeight = 0.2f;
floor.Height = 10.0f;
floor.Map = Map;
building.Floors.Add(floor);
building.Type = "generic";
building.RemoveTrees(Map.TerrainData);
Map.Buildings.Add(building);
Init(Map);
var geometry = new InputGeometry();
//it is necessary to put a border around all the points in order to get triangulation to work correctly when holes are used
var border = new List<Point>();
border.Add(new Point(10, 6));
border.Add(new Point(10, -6));
border.Add(new Point(-10, -6));
border.Add(new Point(-10, 6));
geometry.AddRing(border);
border = new List<Point>();
border.Add(new Point(7, 4));
border.Add(new Point(7, 2));
border.Add(new Point(5, 2));
border.Add(new Point(5, 4));
geometry.AddRingAsHole(border);
border = new List<Point>();
border.Add(new Point(3, 2));
border.Add(new Point(3, -6));
border.Add(new Point(-3, -6));
border.Add(new Point(-3, 2));
geometry.AddRingAsHole(border);
var meshRepresentation = new TriangleNet.Mesh();
meshRepresentation.Triangulate(geometry);
var triangleIndex = 0;
var vertices = new List<Vector3>(meshRepresentation.triangles.Count * 3);
var triangleIndices = new List<int>(meshRepresentation.triangles.Count * 3);
foreach(var pair in meshRepresentation.triangles)
{
var triangle = pair.Value;
var vertex0 = triangle.GetVertex(0);
var vertex1 = triangle.GetVertex(1);
var vertex2 = triangle.GetVertex(2);
var p0 = new Vector3( vertex0.x, vertex0.y, 0 );
var p1 = new Vector3( vertex1.x, vertex1.y, 0 );
var p2 = new Vector3( vertex2.x, vertex2.y, 0 );
vertices.Add(p0);
vertices.Add(p1);
vertices.Add(p2);
triangleIndices.Add(triangleIndex + 2);
triangleIndices.Add(triangleIndex + 1);
triangleIndices.Add(triangleIndex);
triangleIndex += 3;
}
var mesh = new Mesh();
mesh.vertices = vertices.ToArray();
mesh.triangles = triangleIndices.ToArray();
mesh.RecalculateNormals();
var newObj = new GameObject();
newObj.name = "Test";
newObj.transform.parent = transform;
newObj.AddComponent<MeshFilter>();
newObj.AddComponent<MeshRenderer>();
newObj.GetComponent<MeshFilter>().mesh = mesh;
/*
var path = new List<ClipperLib.IntPoint>();
path.Add(new ClipperLib.IntPoint(-3000, 0));
path.Add(new ClipperLib.IntPoint(1000, 0));
path.Add(new ClipperLib.IntPoint(6000, 3000));
path.Add(new ClipperLib.IntPoint(6000, -3000));
path.Add(new ClipperLib.IntPoint(1000, 0));
//path.Add(new ClipperLib.IntPoint(5000, 0));
//path.Add(new ClipperLib.IntPoint(1000, -3500));
//path.Add(new ClipperLib.IntPoint(-3000, 0));
var co = new ClipperLib.ClipperOffset();
co.AddPath(path, ClipperLib.JoinType.jtSquare, ClipperLib.EndType.etClosedLine);
var result = new List<List<ClipperLib.IntPoint>>();
co.Execute(ref result, 500);
foreach (var intpoint in path)
{
var point = new Vector3((float)intpoint.X / 1000.0f, 0, (float)intpoint.Y / 1000.0f);
Debug.DrawLine(point, point + Vector3.up * 3, Color.cyan, 100);
}
foreach (var intpath in result)
{
foreach (var intpoint in intpath)
{
var point = new Vector3((float)intpoint.X / 1000.0f, 0, (float)intpoint.Y / 1000.0f);
Debug.DrawLine(point, point + Vector3.up * 3, Color.red, 100);
}
}
*/
}