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Action:
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Creates a 3D B-spline curve specified as a sequence of control points, weights, and an associated knot vector.
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Prototype:
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bs3_curve bs3_curve_from_ctrlpts (
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int degree,
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// degree
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logical rational,
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// rational
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logical closed,
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// closed
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logical periodic,
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// periodic
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int num_ctrlpts,
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// number of control
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// points
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const SPAposition
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// control points
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ctrlpts[],
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// array
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const double weights[],
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// weights array
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double ctrlpt_tol,
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// control point
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// tolerance
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int num_knots,
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// number of knots
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const double knots[],
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// knots array
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double knot_tol,
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// knot tolerance
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const int& dimension
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// control point
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=*(int*)NULL_REF
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// dimension specified in
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// ctrlpts array.
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);
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Includes:
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#include "kernel/acis.hxx"
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#include "baseutil/logical.h"
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#include "baseutil/vector/position.hxx"
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#include "kernel/spline/bs3_crv/bs3curve.hxx"
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#include "kernel/spline/sg_bs3c/sps3crtn.hxx"
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Description:
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The control point tolerance and knot tolerance are used to determine when control points or knots are the same. If an error occurs, a
NULL curve is returned.
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Allowed values for control point dimension are 1, 2 or 3. Default value is 3 corresponding to x, y and z.
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Note
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Control dimension does NOT depend on rational or non-rational.
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Library:
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kernel
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Filename:
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kern/kernel/spline/sg_bs3c/sps3crtn.hxx
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Effect:
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Changes model
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