SymbLclDistCrvLine

Section: C Library Functions (3)
Updated: IRIT Version 6.0
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NAME

SymbLclDistCrvLine()  

SYNOPSIS

symb_lib/distance.c:241

CagdPtStruct *SymbLclDistCrvLine(CagdCrvStruct *Crv,
                                 CagdLType Line,
                                 CagdRType Epsilon,
                                 CagdBType InterPos,
                                 CagdBType ExtremPos)
 

DESCRIPTION

Given a curve and a line, finds the local extreme distance points on the curve to the given line. Returned is a list of parameter value with local extreme distances. Let Crv be (x(t), y(t)). By substituting x(t) and y(t) into the line equation, we derive the distance function. Its zero set, possibly combined with the zero set of its derivative provide the needed extreme distances.  

PARAMETERS:

Crv: The curve to find its nearest (farest) point to Line.

Line: The line to find the nearest (farest) point on Crv to it.

Epsilon: Accuracy of computation.

InterPos: Do we want the intersection locations?

ExtremPos: Do we want the extremum distance locations?  

FUNCTION RETURN VALUE

CagdPtStruct *: A list of parameter values of extreme distance locations.

 

ORIGIN

(C) Copyright 1989/90-95 Gershon Elber, Technion, IIT


 

Index

NAME
SYNOPSIS
DESCRIPTION
PARAMETERS:
FUNCTION RETURN VALUE
ORIGIN

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