NRBDEVAL: Evaluation of the derivative NURBS curve or surface. [pnt, jac] = nrbdeval(crv, dcrv, tt) [pnt, jac] = nrbdeval(srf, dsrf, {tu tv}) INPUTS: crv - original NURBS curve. srf - original NUBRS surface dcrv - NURBS derivative represention of crv dsrf - NURBS derivative represention of surface tt - parametric evaluation points If the nurbs is a surface then tt is a cell {tu, tv} are the parametric coordinates pnt - evaluated points. jac - evaluated first derivatives (Jacobian). Examples: // Determine the first derivatives a NURBS curve at 9 points for 0.0 to // 1.0 tt = linspace(0.0, 1.0, 9); dcrv = nrbderiv(crv); [pnts,jac] = nrbdeval(crv, dcrv, tt);

- demodercrv % Copyright (C) 2003 Mark Spink
- demodersrf Demonstrates the construction of a general
- nrbsrfgradient % Copyright (C) 2009 Carlo de Falco

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