/// <summary>
/// Initializes a new instance of the <see cref="PolygonalFace" /> class.
/// </summary>
/// <param name="vertices">The vertices.</param>
/// <param name="normal">A guess for the normal vector.</param>
/// <param name="connectVerticesBackToFace">if set to <c>true</c> [connect vertices back to face].</param>
public PolygonalFace(IEnumerable <Vertex> vertices, double[] normal, bool connectVerticesBackToFace = true)
: this()
{
foreach (var v in vertices)
{
Vertices.Add(v);
if (connectVerticesBackToFace)
{
v.Faces.Add(this);
}
}
var centerX = Vertices.Average(v => v.X);
var centerY = Vertices.Average(v => v.Y);
var centerZ = Vertices.Average(v => v.Z);
Center = new[] { centerX, centerY, centerZ };
bool reverseVertexOrder;
Normal = DetermineNormal(Vertices, out reverseVertexOrder, normal);
if (reverseVertexOrder)
{
Vertices.Reverse();
}
Area = DetermineArea();
}
//Set new normal and area.
//References are assumed to be the same.
/// <summary>
/// Updates normal, vertex order, and area
/// </summary>
public void Update()
{
var centerX = Vertices.Average(v => v.X);
var centerY = Vertices.Average(v => v.Y);
var centerZ = Vertices.Average(v => v.Z);
Center = new[] { centerX, centerY, centerZ };
bool reverseVertexOrder;
Normal = DetermineNormal(this.Vertices, out reverseVertexOrder, Normal);
if (reverseVertexOrder)
{
Vertices.Reverse();
}
Area = DetermineArea();
}
public void ComputeCentroid()
{
Centroid = new Point3d(Vertices.Average(x => x.Point.X), Vertices.Average(y => y.Point.Y), Vertices.Average(z => z.Point.Z));
}
public C3Vector GetCenter() => new C3Vector(Vertices.Average(x => x.X), Vertices.Average(x => x.Y), Vertices.Average(x => x.Z));
Vector2 GetCentroid()
{
return(new Vector2((float)Vertices.Average(v => v.Position[0]), (float)Vertices.Average(v => v.Position[1])));
}
public Point3D GetCenter()
{
return(new Point3D(Vertices.Average(v => v.X), Vertices.Average(v => v.Y), Vertices.Average(v => v.Z)));
}