Code covered by the BSD License
% % DFZ % % En bzierkurvas z-derivata vid tiden t. function f=dfz(p1,b,c,p2,t) p1z=p1(3); p2z=p2(3); bz=b(3); cz=c(3); f=-3*(1-t)^2*p1z-6*(1-t)*t*bz+3*(1-t)^2*bz-3*t^2*cz+6*(1-t)*t*cz+3*t^2*p2z;
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