/// <summary>
/// Constructs a plane from an equation
/// ax+by+cz+d=0.
/// </summary>
public Plane(double a, double b, double c, double d)
: this()
{
var eqn = new PlaneEquation(a, b, c, d);
if (CreateFromEquation(eqn))
{
this.m_zaxis.Normalize();
}
else
{
throw new ArgumentException();
}
}
/// <summary>
/// Evaluates whether or not this circle is co-planar with a given plane.
/// </summary>
/// <param name="plane">Plane.</param>
/// <param name="tolerance">Tolerance to use.</param>
/// <returns>true if the circle plane is co-planar with the given plane within tolerance.</returns>
public bool IsInPlane(Plane plane, double tolerance)
{
double d;
int i;
var equ = new PlaneEquation(plane.GetPlaneEquation());
for (i = 0; i < 8; i++)
{
d = equ.ValueAt(PointAt(0.25 * i * Math.PI));
if (Math.Abs(d) > tolerance)
{
return(false);
}
}
return(true);
}
public bool CreateFromEquation(PlaneEquation eqn)
{
bool b = false;
equation = eqn;
m_zaxis.X = eqn.X;
m_zaxis.Y = eqn.Y;
m_zaxis.Z = eqn.Z;
double d = m_zaxis.Length;
if (d > 0.0)
{
d = 1.0 / d;
m_zaxis *= d;
m_origin = (Point3D)(-d * eqn.D * m_zaxis);
b = true;
}
m_xaxis.PerpendicularTo(m_zaxis);
m_xaxis.Normalize();
m_yaxis = m_zaxis.Cross(m_xaxis);
m_yaxis.Normalize();
return(b);
}
