demodegelev.m

强大的nurbs的工具箱 nurbs曲线

% Demonstration of the degree elevation algorithm.
%

crv = nrbtestcrv;

% plot the control points
plot(crv.coefs(1,:),crv.coefs(2,:),'bo')
title('Degree elevation of test curve by 1');
hold on;
plot(crv.coefs(1,:),crv.coefs(2,:),'b--');

% draw nurbs curve
nrbplot(crv,48);

% degree elevate the curve by 1
icrv = nrbdegelev(crv, 1);

% insert new knots and plot new control points
plot(icrv.coefs(1,:),icrv.coefs(2,:),'ro')
plot(icrv.coefs(1,:),icrv.coefs(2,:),'r--');

hold off;