poly_basis_dx 249 magick/distort.c default: return( poly_basis_dx(n-1,x,y) ); /* weird but true */ poly_basis_dx 2511 magick/distort.c du.x += poly_basis_dx(k,d.x,d.y)*coeff[2+k]; poly_basis_dx 2514 magick/distort.c dv.x += poly_basis_dx(k,d.x,d.y)*coeff[2+k+nterms];