+ angle += segment_angle;
+ }
+
+
+ /* Now add the labels.
+ Don't put this in the loop above; the labels must
+ be put in last, otherwise the segment fill could
+ obscure them.
+ */
+ angle = 0.0;
+ for (i = 0; i < pie->n_slices ; ++i )
+ {
+ const double segment_angle =
+ pie->slices[i].magnitude / total_magnitude * 2 * M_PI ;
+
+ const double label_x = centre_x +
+ radius * cos (angle + segment_angle/2.0);
+
+ const double label_y = centre_y +
+ radius * sin (angle + segment_angle/2.0);
+