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Action:
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Gets the normalized rational polynomial for the indexed span of the given curve.
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Prototype:
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rat_poly_vec bs3_curve_span_poly (
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int n,
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// given span index
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bs3_curve cur
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// given curve
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);
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Includes:
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#include "kernel/acis.hxx"
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#include "kernel/kernutil/poly/poly.hxx"
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#include "kernel/spline/bs3_crv/bs3curve.hxx"
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#include "kernel/spline/bs3_crv/sp3crtn.hxx"
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Description:
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On the assumption that a
bs3_curve is a piecewise rational polynomial vector function of its parameter, convert the nth span into a rational polynomial vector.
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The parameter range of the polynomial is normalized to [0, 1], to minimize numerical problems. The class
rat_poly_vec is defined in
kernutil/poly/poly.hxx, but can be treated roughly as four arrays of doubles, each being the coefficients of the polynomial in order of increasing degree.
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Library:
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kernel
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Filename:
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kern/kernel/spline/bs3_crv/sp3crtn.hxx
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Effect:
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System routine
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