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Action:
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Joins two 2D B-splines end to end.
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Prototype:
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bs2_curve bs2_curve_connect (
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bs2_curve crv1,
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// first curve
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bs2_curve crv2
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// second curve
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);
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Includes:
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#include "kernel/acis.hxx"
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#include "kernel/spline/bs2_crv/bs2curve.hxx"
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#include "kernel/spline/bs2_crv/sp2crtn.hxx"
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Description:
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The two input curves will be deleted if successful. As with
bs3_curve_connect, this routine takes care of compatibility of the curves, and of cleaning up: the two input splines are gone after the call, and the resulting spline is the return value.
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It's dangerous to code:
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s1 = bs2_curve_connect(s1, s2)
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because if it fails, it returns a
NULL pointer and leaves
s1 and
s2 alone. Thus
s1 still exists but the caller has just zeroed its pointer. So always code:
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s3 = bs2_curve_connect(s1, s2)
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then either
s3 is valid and
s1 and
s2 are gone, or vice versa.
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This is similar to
bs3_curve_connect, but not identical because the curve values have different meanings. In particular, it does not compare end points to decide which end to connect to which. Also, the second curve is not reparameterized to be true C1 with the first curve, because that's not appropriate in parameter space. As with
bs2_curve_join, the second curve will be translated to match the first curve's end point. This also applies to the parameterizations.
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Library:
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kernel
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Filename:
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kern/kernel/spline/bs2_crv/sp2crtn.hxx
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Effect:
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Changes model
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