// Construction. If the input controls is non-null, a copy is made of
// the controls. To defer setting the control points or weights, pass
// null pointers and later access the control points or weights via
// GetControls(), GetWeights(), SetControl(), or SetWeight() member
// functions. The 'controls' and 'weights' must be stored in
// row-major order, attribute[i0 + numControls0*i1]. As a 2D array,
// this corresponds to attribute2D[i1][i0].
public NURBSSurface(BasisFunctionInput input0, BasisFunctionInput input1, Vector3[] controls, double[] weights)
: base(0 - 0, 1.0, 0.0, 1.0, true)
{
this.basisFunctions = new[] { new BasisFunction(input0), new BasisFunction(input1) };
this.numControls = new[] { input0.NumControls, input1.NumControls };
// The mBasisFunction stores the domain but so does ParametricSurface.
this.uMin = this.basisFunctions[0].MinDomain;
this.uMax = this.basisFunctions[0].MaxDomain;
this.vMin = this.basisFunctions[1].MinDomain;
this.vMax = this.basisFunctions[1].MaxDomain;
// The replication of control points for periodic splines is
// avoided by wrapping the i-loop index in Evaluate.
this.controls = new Vector3[this.numControls[0] * this.numControls[1]];
if (controls != null)
{
controls.CopyTo(this.controls, 0);
}
this.weights = new double[this.numControls[0] * this.numControls[1]];
if (weights != null)
{
weights.CopyTo(this.weights, 0);
}
this.isConstructed = true;
}
// Construction. If the input controls is non-null, a copy is made of
// the controls. To defer setting the control points, pass a null
// pointer and later access the control points via GetControls() or
// SetControl() member functions. The domain is t in [t[d],t[n]],
// where t[d] and t[n] are knots with d the degree and n the number of
// control points.
public BSplineCurve(BasisFunctionInput input, Vector3[] controls)
: base(0.0, 1.0)
{
this.basisFunction = new BasisFunction(input);
// The mBasisFunction stores the domain but so does ParametricCurve.
this.SetTimeInterval(this.basisFunction.MinDomain, this.basisFunction.MaxDomain);
// The replication of control points for periodic splines is
// avoided by wrapping the i-loop index in Evaluate.
this.controls = new Vector3[input.NumControls];
if (controls != null)
{
controls.CopyTo(this.controls, 0);
}
this.isConstructed = true;
}
