nrbcylind.m

强大的nurbs的工具箱 nurbs曲线

function surf = nrbcylind(height,radius,center,sang,eang)
% 
% Function Name:
% 
%   nrbcylind - Construct a cylinder or cylindrical patch.
% 
% Calling Sequence:
% 
%   srf = nrbcylind()
%   srf = nrbcylind(height)
%   srf = nrbcylind(height,radius)
%   srf = nrbcylind(height,radius,center)
%   srf = nrbcylind(height,radius,center,sang,eang)
% 
% Parameters:
% 
%   height	: Height of the cylinder along the axis, default 1.0
% 
%   radius	: Radius of the cylinder, default 1.0
% 
%   center	: Center of the cylinder, default (0,0,0)
% 
%   sang        : Start angle relative to the origin, default 0.
% 
%   eang	: End angle relative to the origin, default 2*pi.
% 
% 
% Description:
% 
%   Construct a cylinder or cylindrical patch by extruding a circular arc.

%  D.M. Spink
%  Copyright (c) 2000.

if nargin < 1
  height = 1;
end

if nargin < 2
  radius = 1;
end

if nargin < 3
  center = [];
end
   
if nargin < 5
  sang = 0;
  eang = 2*pi;
end

surf = nrbextrude(nrbcirc(radius,center,sang,eang),[0.0 0.0 height]);