// Check conditions for G2 and C2 continuity:
// * calculate principal curvatures on each surface
- // * continuity is C2 if directions of principal curvatures are equal on differenct surfaces
+ // * continuity is C2 if directions of principal curvatures are equal on different surfaces
// * continuity is G2 if directions of principal curvatures are just parallel
// and values of curvatures are the same
aSP1.Curvature(aCrvDir1[0], aCrvLen1[0], aCrvDir1[1], aCrvLen1[1]);