improve comment

This commit is contained in:
Holger Vogt 2020-11-29 16:28:51 +01:00
parent d24aa7134c
commit c43c6f6ca4
1 changed files with 5 additions and 1 deletions

View File

@ -130,6 +130,10 @@ ft_graf(struct dvec *v, struct dvec *xs, bool nostart)
* interpolation.
*/
if ((degree == 1) && (gridsize == 0)) {
/* We have to take care of non-monotonic x-axis values.
If they occur, plotting is suppressed, except for mono is set
to FALSE by flag 'retraceplot' in command 'plot'.
Then everything is plotted. */
bool mono = (currentgraph->plottype != PLOT_RETLIN);
dir = 0;
for (i = 0, j = v->v_length; i < j; i++) {
@ -137,7 +141,7 @@ ft_graf(struct dvec *v, struct dvec *xs, bool nostart)
realpart(xs->v_compdata[i]);
dy = isreal(v) ? v->v_realdata[i] :
realpart(v->v_compdata[i]);
if ((i == 0 || (dir > 0 ? lx > dx : dir < 0 ? lx < dx : 0)) &&
if ((i == 0 || (dir > 0 ? lx > dx : (dir < 0 ? lx < dx : 0))) &&
(mono || (xs->v_plot && xs->v_plot->pl_scale == xs)))
{
gr_point(v, dx, dy, lx, ly, 0);