Initial commit: pure-Rust COLMAP port

tests/pipeline_example.rs

@@ -0,0 +1,48 @@
+//! Integration tests for the documented pipeline examples (see the crate-level docs).
+//!
+//! These assert that the runnable parts of the examples behave as documented and
+//! that the scaffolded steps report `Error::Unimplemented` rather than panicking.
+
+use std::path::Path;
+
+use colmap::math::{Vec2, Vec3};
+use colmap::scene::Camera;
+use colmap::types::CameraModelId;
+use colmap::Error;
+
+/// Example 1 — basic building blocks: a pinhole camera projects an on-axis point
+/// onto its principal point.
+#[test]
+fn basic_building_blocks_example() {
+    let camera = Camera::new_with_model(1, CameraModelId::Pinhole, 800.0, 640, 480);
+    assert_eq!(camera.model_name(), "PINHOLE");
+    assert_eq!((camera.width, camera.height), (640, 480));
+
+    let uv = camera.img_from_cam(&Vec3::new(0.0, 0.0, 1.0)).unwrap();
+    assert_eq!(uv, Vec2::new(320.0, 240.0));
+
+    // Option structs construct with sane defaults.
+    let features = colmap::feature::FeatureExtractionOptions::default();
+    assert!(features.sift.max_num_features > 0);
+}
+
+/// Example 2 — the workflow's option structs compose as documented.
+#[test]
+fn workflow_options_compose() {
+    let sfm = colmap::sfm::IncrementalPipelineOptions::default();
+    assert!(sfm.min_num_matches >= 1);
+    let mvs = colmap::mvs::PatchMatchOptions::default();
+    assert!(mvs.window_radius >= 1);
+}
+
+/// Example 3 — error handling: a scaffolded step returns `Error::Unimplemented`.
+#[test]
+fn scaffolded_step_reports_unimplemented() {
+    use colmap::mvs::{patch_match_stereo, PatchMatchOptions};
+
+    let result = patch_match_stereo(Path::new("/tmp/workspace"), &PatchMatchOptions::default());
+    match result {
+        Err(Error::Unimplemented(what)) => assert_eq!(what, "dense patch-match stereo"),
+        other => panic!("expected Unimplemented, got {other:?}"),
+    }
+}