private Point3D findCenter()
{
var x = Faces.Average(face => face.center.X);
var y = Faces.Average(face => face.center.Y);
var z = Faces.Average(face => face.center.Z);
return(new Point3D(x, y, z));
}
/// <summary>
/// Initializes a new instance of the <see cref="Plane" /> class.
/// </summary>
/// <param name="faces">The faces.</param>
public Plane(IEnumerable <PolygonalFace> faces)
: base(faces)
{
//Set the normal by weighting each face's normal with its area
//This makes small faces have less effect at shifting the normal
var normalSumX = 0.0;
var normalSumY = 0.0;
var normalSumZ = 0.0;
foreach (var face in Faces)
{
var weightedNormal = face.Normal * face.Area;
normalSumX += weightedNormal.X;
normalSumY += weightedNormal.Y;
normalSumZ += weightedNormal.Z;
}
Normal = new Vector3(normalSumX, normalSumY, normalSumZ).Normalize();
DistanceToOrigin = Faces.Average(f => Normal.Dot(f.Vertices[0].Coordinates));
}
/// <summary>
/// Initializes a new instance of the <see cref="Flat" /> class.
/// </summary>
/// <param name="faces">The faces.</param>
public Flat(IEnumerable <PolygonalFace> faces)
: base(faces)
{
Type = PrimitiveSurfaceType.Flat;
//Set the normal by weighting each face's normal with its area
//This makes small faces have less effect at shifting the normal
var normalSum = new double[3];
foreach (var face in faces)
{
var weightedNormal = face.Normal.multiply(face.Area);
normalSum[0] += weightedNormal[0];
normalSum[1] += weightedNormal[1];
normalSum[2] += weightedNormal[2];
}
Normal = normalSum.normalize(3);
DistanceToOrigin = Faces.Average(f => Normal.dotProduct(f.Vertices[0].Position, 3));
}
protected override object GetFieldValue(Item cognitiveIndexable)
{
return((Faces != null && Faces.Length > 0)
? (object)Faces?.Average(x => x.FaceAttributes.Emotion.Fear)
: null);
}