- /* compute gradient vector */
- fprintf(stderr, "x1 %*s, y1 %*s, x2 %*s, y2 %*s\n",
- dom_string_length(state->gradient_x1),
- dom_string_data(state->gradient_x1),
- dom_string_length(state->gradient_y1),
- dom_string_data(state->gradient_y1),
- dom_string_length(state->gradient_x2),
- dom_string_data(state->gradient_x2),
- dom_string_length(state->gradient_y2),
- dom_string_data(state->gradient_y2));
-