# B-Spline & OpenGL (Matlab Code)

Source: Internet
Author: User

There are some errors in the Code, anyone can help me to find and tell me?

Thanks a lot!

`% % % --------------------------------% % % Author: begtostudy% % % MSN:begtostudy@hotmail.com% % % Email : begtostudy@gmail.com% % % --------------------------------function Q = bspline( P,U ,t,w)% B-Spline interpolation for given points.if (nargin==2)      w=ones(1,size(P,2));end    for k=1:length(t)        Q(:,k)=[0 0 0]';        rational=0;        for j=1:size(P,2)            tmp=deboor(U,size(P,2)-1,j,t(k));if (nargin==3)                rational =rational+w(j)*tmp;end            Q(:,k)=Q(:,k)+w(j)*P(:,j)*tmp;endif (nargin==3)            Q(:,k)=Q(:,k)/rational;endendendfunction N=deboor(U,k,i,u)if isequal(k,1)if (abs(U(i)-U(i+1))<1e-6) && (abs((U(i)-u))<1e-6)             N=1;                elseif u>=U(i) && u<U(i+1)            N=1;else            N=0;endelse        N=division(u-U(i),U(i+k)-U(i))*deboor(U,k-1,i,u)...        +division(U(i+k+1)-u,U(i+k+1)-U(i+1))*deboor(U,k-1,i+1,u);endendfunction d=division(a,b)if (abs(a)<1e-6) && (abs(b)<1e-6)         d=0;else        d=a/b;endend`
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