1 files changed, 56 insertions, 0 deletions
diff --git a/vendor/plotters/examples/3d-plot2.rs b/vendor/plotters/examples/3d-plot2.rs
new file mode 100644
index 000000000..0b5ca2131
--- /dev/null
+++ b/vendor/plotters/examples/3d-plot2.rs
@@ -0,0 +1,56 @@
+use plotters::prelude::*;
+fn pdf(x: f64, y: f64) -> f64 {
+    const SDX: f64 = 0.1;
+    const SDY: f64 = 0.1;
+    const A: f64 = 5.0;
+    let x = x as f64 / 10.0;
+    let y = y as f64 / 10.0;
+    A * (-x * x / 2.0 / SDX / SDX - y * y / 2.0 / SDY / SDY).exp()
+}
+
+const OUT_FILE_NAME: &'static str = "plotters-doc-data/3d-plot2.gif";
+fn main() -> Result<(), Box<dyn std::error::Error>> {
+    let root = BitMapBackend::gif(OUT_FILE_NAME, (600, 400), 100)?.into_drawing_area();
+
+    for pitch in 0..157 {
+        root.fill(&WHITE)?;
+
+        let mut chart = ChartBuilder::on(&root)
+            .caption("2D Gaussian PDF", ("sans-serif", 20))
+            .build_cartesian_3d(-3.0..3.0, 0.0..6.0, -3.0..3.0)?;
+        chart.with_projection(|mut p| {
+            p.pitch = 1.57 - (1.57 - pitch as f64 / 50.0).abs();
+            p.scale = 0.7;
+            p.into_matrix() // build the projection matrix
+        });
+
+        chart
+            .configure_axes()
+            .light_grid_style(BLACK.mix(0.15))
+            .max_light_lines(3)
+            .draw()?;
+
+        chart.draw_series(
+            SurfaceSeries::xoz(
+                (-15..=15).map(|x| x as f64 / 5.0),
+                (-15..=15).map(|x| x as f64 / 5.0),
+                pdf,
+            )
+            .style_func(&|&v| {
+                (&HSLColor(240.0 / 360.0 - 240.0 / 360.0 * v / 5.0, 1.0, 0.7)).into()
+            }),
+        )?;
+
+        root.present()?;
+    }
+
+    // To avoid the IO failure being ignored silently, we manually call the present function
+    root.present().expect("Unable to write result to file, please make sure 'plotters-doc-data' dir exists under current dir");
+    println!("Result has been saved to {}", OUT_FILE_NAME);
+
+    Ok(())
+}
+#[test]
+fn entry_point() {
+    main().unwrap()
+}