Line with thousands of points does not work

[arximboldi]

Hi!

I'm trying to plot lines with potentially millions of points. However the plot breaks just after a few thousands.

I've tried plotting the spiral from #41 #40, like this:

            ImPlot::PlotLineG(
                "spiral",
                [](void*, int idx) -> ImPlotPoint {
                    float r = 0.9f;             // outer radius
                    float a = 0;                // inner radius
                    float b = 0.05f;            // incerement per rev
                    float n = (r - a) / b;      // number  of revolutions
                    double th = 2 * n * M_PI;   // angle
                    float Th = float(th * idx / (1000000 - 1));
                    return ImPlotPoint(0.5f + (a + b * Th / (2.0f * (float)M_PI)) * cosf(Th),
                                       0.5f + (a + b * Th / (2.0f * (float)M_PI)) * sinf(Th));
                },
                nullptr, 1000000);

And nothing shows. In fact, the crosshair and other markers "disappear", as if the plot simply got broken:

You can see leyend, crosshairs etc ar missing, and only part of the spiral is drawn, a tiny blue line on the right edge.

What do you think is causing this issue?

[arximboldi]

Btw, this line has a million points, but this can already be reproduced with a few thousands points sadly :(

[arximboldi]

The screenshot above was not centered, here is a screenshot of the plot, centered, and with only 100000 points, which already reproduces it:

You can see that only the center of the spiral is visible: somehow it starts drawing, and at some point it "breaks"...

[epezent]

Please read the Special Notes section of the README and report back if neither of the fixes resolve the issue.

[arximboldi]

Ohhhh I missed that! Thank's for the super-quick response. I'll take a look tomorrow and report back if it doesn't work.

[epezent]

No problem!

[arximboldi]

I can confirm that the suggested solution worked!