How do i set the z-axis in a 3d plot to point upwards on the screen?

[iverks]

I'd like to plot some vectors i get from some simulations i run, who all point in the z-direction. I tried using the transformations but couldn't quite get it to work correctly.

Example code

fn main() {
    let root = BitMapBackend::gif("plots/testplot.gif", (600, 400), 1000)?.into_drawing_area();

    for _ in 0..1 {
        root.fill(&WHITE).unwrap();

        let mut chart =
            ChartBuilder::on(&root).build_cartesian_3d(0.0..1.0, -1.0..1.0, -1.0..1.0)?;

        chart.with_projection(|mut p| {
            // p.pitch = PI * 0.5 + 0.12; // 
            p.scale = 0.9; 
            p.into_matrix()
        });

        chart
            .configure_axes()
            .light_grid_style(BLACK.mix(0.3))
            .max_light_lines(3)
            .draw()?;

        chart
            .draw_series(LineSeries::new(
                [(0.0, 0.0, 0.0), (0.0, 0.0, 1.0)].into_iter(),
                &RED,
            ))
            .unwrap();

        root.present()?;
    }

    root.present().expect(
        "Unable to write result to file, please make sure 'plots' dir exists under current dir",
    );
    println!("Result has been saved to testplot.gif");

    Ok(())
}

[iverks]

After looking at it more i feel like this might be issue-worthy (or pr), there really is no good way to do any complex rotations. Trying to build rotations without the builder function is very hard with my little knowledge of the topic, and there is no good way (afaik) to apply multiple transforms sequentially. Would be great to have the ability to push arbitrary transform matrixes queue in the builder, and then have them be multiplied sequentially in the into_matrix function.