Lines Matching refs:du
2496 du,dv; /* the du,dv vectors from unit dx,dy -- derivatives */
2498 s.x=s.y=du.x=du.y=dv.x=dv.y=0.0;
2501 du.x += poly_basis_dx(k,d.x,d.y)*coeff[2+k];
2502 du.y += poly_basis_dy(k,d.x,d.y)*coeff[2+k];
2507 ScaleFilter( resample_filter[id], du.x,du.y,dv.x,dv.y );
2586 fprintf(stderr, "du/dx=%lf du/dx=%lf dv/dx=%lf dv/dy=%lf\n",
2619 fprintf(stderr, "du/dx=%lf du/dx=%lf dv/dx=%lf dv/dy=%lf\n",
