public static ErrorMetric operator -(ErrorMetric e1, ErrorMetric e2)
{
ErrorMetric result = new ErrorMetric();
result.m_Matrix = e1.m_Matrix - e2.m_Matrix;
return(result);
}
private double ComputeError(int id1, int id2, out Vector3 error)
{
ErrorMetric edge = ErrorMetric.Empty;
ErrorMetric delta = ErrorMetric.Empty;
Vector3 vertex = new Vector3();
edge = m_Quadrics[id1] + m_Quadrics[id2];
delta = edge;
Matrix m = delta.Matrix;
{
m.M41 = 0.0f;
m.M42 = 0.0f;
m.M43 = 0.0f;
m.M44 = 1.0f;
}
delta.Matrix = m;
double minError = 0.0;
if (Math.Abs(delta.Matrix.Determinant()) <= 1e-5)
{
Vector3 v1 = m_Vertices[id1].Position;
Vector3 v2 = m_Vertices[id2].Position;
Vector3 v3 = Vector3Extension.Mean(v1, v2);
double e1 = edge.Evaluate(v1);
double e2 = edge.Evaluate(v2);
double e3 = edge.Evaluate(v3);
minError = Math.Min(Math.Min(e1, e2), e3);
if (minError == e1)
{
vertex = v1;
}
else if (minError == e2)
{
vertex = v2;
}
else if (minError == e3)
{
vertex = v3;
}
}
else
{
double det = (double)delta.Matrix.IndexedDeterminant(0, 1, 2, 4, 5, 6, 8, 9, 10);
vertex.X = (float)(-1.0 / det * (delta.Matrix.IndexedDeterminant(1, 2, 3, 5, 6, 7, 9, 10, 11)));
vertex.Y = (float)(1.0 / det * (delta.Matrix.IndexedDeterminant(0, 2, 3, 4, 6, 7, 8, 10, 11)));
vertex.Z = (float)(-1.0 / det * (delta.Matrix.IndexedDeterminant(0, 1, 3, 4, 5, 7, 8, 9, 11)));
}
error = vertex;
minError = edge.Evaluate(vertex);
return(minError);
}
