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Action:
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Determines the curve direction at the given parameter value.
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Prototype:
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SPAunit_vector bs3_curve_tangent (
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double param,
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// given parameter value
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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 "baseutil/vector/unitvec.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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Normally, this normalizes the result of
bs3_curve_deriv.
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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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