tovjemam/PC_graph
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osetrit nan

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tovjemam 2024-11-12 11:38:00 +01:00
parent 30e1165d78
commit 474180e790
1 changed files with 13 additions and 5 deletions
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18
ps_graph.c
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@ -39,8 +39,8 @@ void ps_export_graph(FILE *file, struct expr_node *node, struct graph_range *ran
for (i = -HALF_GRAPH_SIZE; i <= HALF_GRAPH_SIZE; i += GRID_STEP) { for (i = -HALF_GRAPH_SIZE; i <= HALF_GRAPH_SIZE; i += GRID_STEP) {
double inorm = (double)i / (double)GRAPH_SIZE + 0.5; double inorm = (double)i / (double)GRAPH_SIZE + 0.5;
double xval = range->xmax * inorm + range->xmin * (1.0 - inorm) ; // range->xmin + inorm * (range->xmax - range->xmin); double xval = range->xmax * inorm + range->xmin * (1.0 - inorm);
double yval = range->ymax * inorm + range->ymin * (1.0 - inorm) ; // range->xmin + inorm * (range->xmax - range->xmin); double yval = range->ymax * inorm + range->ymin * (1.0 - inorm);
fprintf(file, fprintf(file,
"newpath\n" "newpath\n"
@ -88,10 +88,18 @@ void ps_export_graph(FILE *file, struct expr_node *node, struct graph_range *ran
); );
for (x = range->xmin; x <= range->xmax; x += range->step) { for (x = range->xmin; x <= range->xmax; x += range->step) {
const char *cmd = "lineto";
double xpos, ypos;
double y = node_eval(node, x); double y = node_eval(node, x);
double xpos = (double)(-HALF_GRAPH_SIZE) + (x - range->xmin) / (range->xmax - range->xmin) * (double)GRAPH_SIZE;
double ypos = (double)(-HALF_GRAPH_SIZE) + (y - range->ymin) / (range->ymax - range->ymin) * (double)GRAPH_SIZE; if (y != y) {
const char* cmd = "lineto"; first = 1;
continue;
}
xpos = (double)(-HALF_GRAPH_SIZE) + (x - range->xmin) / (range->xmax - range->xmin) * (double)GRAPH_SIZE;
ypos = (double)(-HALF_GRAPH_SIZE) + (y - range->ymin) / (range->ymax - range->ymin) * (double)GRAPH_SIZE;
if (first) { if (first) {
cmd = "moveto"; cmd = "moveto";
first = 0; first = 0;