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Action:
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Determines whether the surface is periodic in the
u-parameter.
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Prototype:
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logical bs3_surface_periodic_u (
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bs3_surface bs
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// given surface
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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 "kernel/spline/bs3_srf/bs3surf.hxx"
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#include "kernel/spline/bs3_srf/sp3srtn.hxx"
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Description:
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This routine returns
TRUE if the parameter line on the surface corresponding to minimum
u-parameter is geometrically identical to that for maximum
u-parameter, the parameterizations are the same, and the normals are continuous across the boundary.
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If this routine returns
TRUE for a surface, any routine that expects a
uv parameter value must be prepared to accept any u value, and to map it into the principle range of the periodic surface (by adding or subtracting a multiple of the period) before evaluating the surface. Any routine that returns an actual
uv value "near" to a given one must return the actual u value close to the given one, even if it is outside the standard surface parameter range.
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Library:
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kernel
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Filename:
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kern/kernel/spline/bs3_srf/sp3srtn.hxx
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Effect:
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Read-only
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