BzrSrfEvalAtParam

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

BzrSrfEvalAtParam()  

SYNOPSIS

cagd_lib/sbzreval.c:44

CagdRType *BzrSrfEvalAtParam(CagdSrfStruct *Srf, CagdRType u, CagdRType v)
 

DESCRIPTION

Evaluates the given tensor product Bezier surface at a given point, by extracting an isoparamteric curve along u from the surface and evaluating the curve at parameter v.


               u -->
     +----------------------+
     |P0                Pi-1|
   V |Pi               P2i-1|  Parametric space orientation - control mesh.
    ||                      |
    v|Pn-i              Pn-1|
     +----------------------+  

PARAMETERS:

Srf: Surface to evaluate at the given (u, v) location.

u, v: Location where to evaluate the surface.  

FUNCTION RETURN VALUE

CagdRType *: A vector holding all the coefficients of all components of curve Crv's point type. If for example the curve's point type is P2, the W, X, and Y will be saved in the first three locations of the returned vector. The first location (index 0) of the returned vector is reserved for the rational coefficient W and XYZ always starts at second location of the returned vector (index 1).  

SEE ALSO

CagdSrfEval, BspSrfEvalAtParam, BspSrfEvalAtParam2, TrimSrfEval,

 

ORIGIN

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


 

Index

NAME
SYNOPSIS
DESCRIPTION
PARAMETERS:
FUNCTION RETURN VALUE
SEE ALSO
ORIGIN

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Time: 07:27:09 GMT, October 17, 2022