Bundle the first-party Python scripting plugin

plugins/opencad-python/examples/create_layout_fixture.rs

@@ -0,0 +1,54 @@
+//! Create one disposable DWG with a paper layout and rectangular viewport.
+//! Usage: cargo run --example create_layout_fixture -- /absolute/output.dwg
+
+use std::io::Write;
+
+use ocs_plugin_api::host::acadrust::{
+    entities::{Line, Text, Viewport},
+    CadDocument, DwgWriter, EntityType, Vector3,
+};
+
+fn main() -> Result<(), Box<dyn std::error::Error>> {
+    let output = std::env::args().nth(1).ok_or("expected output DWG path")?;
+    let output = std::path::PathBuf::from(output);
+    let twisted = std::env::args().nth(2).as_deref() == Some("--twisted");
+    if output.extension().is_none_or(|value| value != "dwg")
+        || output.parent().is_none_or(|parent| !parent.is_dir())
+    {
+        return Err("output must be a .dwg in an existing directory".into());
+    }
+    let mut document = CadDocument::new();
+    document.add_layout("Sheet")?;
+    document.add_entity(EntityType::Line(Line::from_coords(
+        -50.0, 0.0, 0.0, 50.0, 0.0, 0.0,
+    )))?;
+    document.add_entity_to_layout(
+        EntityType::Text(Text::with_value(
+            "Sheet note",
+            Vector3::new(20.0, 20.0, 0.0),
+        )),
+        "Sheet",
+    )?;
+    let mut viewport = Viewport::new();
+    viewport.id = 2;
+    viewport.center = Vector3::new(100.0, 80.0, 0.0);
+    viewport.width = 100.0;
+    viewport.height = 50.0;
+    viewport.view_height = 100.0;
+    viewport.view_center = Vector3::new(10.0, 20.0, 0.0);
+    viewport.view_target = Vector3::ZERO;
+    if twisted {
+        viewport.twist_angle = std::f64::consts::FRAC_PI_2;
+        viewport.view_target = Vector3::new(5.0, 10.0, 0.0);
+    }
+    document.add_entity_to_layout(EntityType::Viewport(viewport), "Sheet")?;
+
+    let mut file = std::fs::OpenOptions::new()
+        .write(true)
+        .create_new(true)
+        .open(&output)?;
+    DwgWriter::write_to_writer(&mut file, &document)?;
+    file.flush()?;
+    println!("Created {}", output.display());
+    Ok(())
+}