Plot points stored in three arrays (X, Y, Z coordinates)

[av69]

Hi,

I want to plot points defined as (x, y, z) coordinates. I only found the way to plot using surfaces functions, but not raw data. I saw people asking this question before but they didn't have any answer.

Thanks!

[Sintegrial Technologies]

Hi,

it is possible with the VolumePlot which is available since version 0.3.1. The latest update you can get here: http://sintegrial.com/qwtplot/pages/en/index.php

[av69]

Thanks!

Is there any example or which function should i use to plot samples??

[Sintegrial Technologies]

Sure, there is VolumePlot example shipped with the distribution. Its usage is quite easy, you just need to pass the 3-coordinates array to the volume plotter class.

[Nuno Pedrosa]

Hi I have been trying to use this feature but I hit a library bug.
when one of the axis has a high range say 0:1E7 and other have lower ranges say 0:20, 0:700 I get squished plot.

you can try this with the simpleplot example, replace the setDomain call there with:
rosenbrock.setDomain(-1.73,1.5e6,-1.5,1.5);

then you get the attached screenshot.

Maybe some normalizing has to be done to the data before displaying it.

Apart from this nag it seems to be a great library to work with.
Thanks

[av69]

Hi again,

Finally i solved using volumeplot as Sintegrial Technologies mentioned above, here i attach an example of the process i did:

//Creating a widget and adding a VolumePlot inside:
QWidget *wm3D = new QWidget(this);
m3Dplot = new VolumePlot(wm3D);

//Function example of how to add data:
void form::add_m3Ddata_point(double x, double y, double z){
m3Ddata.push_back(Voxel(x,y,z,0,0,255,255)); // The last 4 numbers are for select the color in rgba format
}

//Adding the data to the VolumePlot:
m3Dplot->createDataset(m3Ddata,true);
m3Dplot->updateData();
m3Dplot->updateGL();

Thanks!