Add a simple example to display Open Photogrammetry Format datasets (#…

…2512)

### What

Add a simple example to display Open Photogrammetry Format datasets


![](https://static.rerun.io/3bb25c43fa2a4c367d036c27943812ebfe3e4d42_open_photogrammetry_format_1200w.png)

This example is currently minimalist in that there is lots more in the
OPF that could be displayed, such as uncalibrated vs. calibrated
cameras, matches between points and cameras, etc. Also, I opted to
display each calibrated camera as individual frames in the timeline, as
displaying them currently spams the viewer with image views.

Closes #2246

Would greatly benefit from #1136
Blocked by #2244 

### Checklist
* [x] I have read and agree to [Contributor
Guide](https://github.com/rerun-io/rerun/blob/main/CONTRIBUTING.md) and
the [Code of
Conduct](https://github.com/rerun-io/rerun/blob/main/CODE_OF_CONDUCT.md)
* [x] I've included a screenshot or gif (if applicable)

<!-- This line will get updated when the PR build summary job finishes.
-->
PR Build Summary: https://build.rerun.io/pr/2512

<!-- pr-link-docs:start -->
Docs preview: https://rerun.io/preview/c1fd3e3/docs
Examples preview: https://rerun.io/preview/c1fd3e3/examples
<!-- pr-link-docs:end -->

---------

Co-authored-by: Emil Ernerfeldt <emil.ernerfeldt@gmail.com>

.gitignore

@@ -6,7 +6,7 @@
 **/target_wasm
 
 # Python virtual environment:
-**/venv
+**/venv*
 
 # Python build artifacts:
 __pycache__

BUILD.md

@@ -69,6 +69,7 @@ First, a local virtual environment must be created and the necessary dependencie
 
 ```sh
 just py-dev-env
+source venv/bin/activate
 ```
 
 Then, the SDK can be compiled and installed in the virtual environment using the following command:

crates/re_space_view_spatial/src/ui.rs

@@ -186,7 +186,7 @@ impl SpatialSpaceViewState {
             if properties.pinhole_image_plane_distance.is_auto() {
                 let scene_size = self.scene_bbox_accum.size().length();
                 let default_image_plane_distance = if scene_size.is_finite() && scene_size > 0.0 {
-                    scene_size * 0.05
+                    scene_size * 0.02 // Works pretty well for `examples/python/open_photogrammetry_format/main.py --no-frames`
                 } else {
                     1.0
                 };

crates/re_viewer/src/app_blueprint.rs

@@ -112,6 +112,7 @@ impl<'a> AppBlueprint<'a> {
 }
 
 fn load_panel_state(path: &EntityPath, blueprint_db: &re_data_store::StoreDb) -> Option<bool> {
+    re_tracing::profile_function!();
     blueprint_db
         .store()
         .query_timeless_component::<PanelState>(path)

crates/re_viewer/src/app_state.rs

@@ -141,8 +141,6 @@ impl AppState {
         egui::CentralPanel::default()
             .frame(central_panel_frame)
             .show_inside(ui, |ui| {
-                re_tracing::profile_function!();
-
                 let spaces_info = SpaceInfoCollection::new(&ctx.store_db.entity_db);
 
                 blueprint.viewport.on_frame_start(&mut ctx, &spaces_info);

crates/re_viewport/src/auto_layout.rs

@@ -6,13 +6,14 @@ use std::collections::BTreeMap;
 
 use itertools::Itertools as _;
 
-use re_viewer_context::SpaceViewId;
+use re_viewer_context::{SpaceViewClassName, SpaceViewId};
 
 use super::space_view::SpaceViewBlueprint;
 
 #[derive(Clone, Debug)]
 struct SpaceMakeInfo {
     id: SpaceViewId,
+    class_name: SpaceViewClassName,
     layout_priority: re_viewer_context::SpaceViewClassLayoutPriority,
 }
 
@@ -35,11 +36,13 @@ pub(crate) fn tree_from_space_views(
             )
         })
         .map(|(space_view_id, space_view)| {
+            let class_name = *space_view.class_name();
             let layout_priority = space_view
                 .class(space_view_class_registry)
                 .layout_priority();
             SpaceMakeInfo {
                 id: *space_view_id,
+                class_name,
                 layout_priority,
             }
         })
@@ -59,13 +62,45 @@ pub(crate) fn tree_from_space_views(
             ],
             &mut tiles,
         )
-    } else {
+    } else if space_make_infos.len() <= 12 {
         // Arrange it all in a grid that is responsive to changes in viewport size:
         let child_tile_ids = space_make_infos
             .into_iter()
             .map(|smi| tiles.insert_pane(smi.id))
             .collect_vec();
         tiles.insert_grid_tile(child_tile_ids)
+    } else {
+        // So many space views - lets group by class and put the members of each group into tabs:
+        let mut grouped_by_class: BTreeMap<SpaceViewClassName, Vec<SpaceMakeInfo>> =
+            Default::default();
+        for smi in space_make_infos {
+            grouped_by_class
+                .entry(smi.class_name)
+                .or_default()
+                .push(smi);
+        }
+
+        let groups = grouped_by_class
+            .values()
+            .cloned()
+            .sorted_by_key(|group| -(group[0].layout_priority as isize));
+
+        let tabs = groups
+            .into_iter()
+            .map(|group| {
+                let children = group
+                    .into_iter()
+                    .map(|smi| tiles.insert_pane(smi.id))
+                    .collect_vec();
+                tiles.insert_tab_tile(children)
+            })
+            .collect_vec();
+
+        if tabs.len() == 1 {
+            tabs[0]
+        } else {
+            tiles.insert_grid_tile(tabs)
+        }
     };
 
     egui_tiles::Tree::new(root, tiles)

crates/re_viewport/src/viewport_blueprint.rs

@@ -28,6 +28,8 @@ pub struct ViewportBlueprint<'a> {
 
 impl<'a> ViewportBlueprint<'a> {
     pub fn from_db(blueprint_db: &'a re_data_store::StoreDb) -> Self {
+        re_tracing::profile_function!();
+
         let space_views: HashMap<SpaceViewId, SpaceViewBlueprint> = if let Some(space_views) =
             blueprint_db
                 .entity_db
@@ -128,6 +130,7 @@ fn load_space_view(
     path: &EntityPath,
     blueprint_db: &re_data_store::StoreDb,
 ) -> Option<SpaceViewBlueprint> {
+    re_tracing::profile_function!();
     blueprint_db
         .store()
         .query_timeless_component::<SpaceViewComponent>(path)
@@ -138,6 +141,7 @@ fn load_viewport(
     blueprint_db: &re_data_store::StoreDb,
     space_views: HashMap<SpaceViewId, SpaceViewBlueprint>,
 ) -> Viewport {
+    re_tracing::profile_function!();
     let auto_space_views = blueprint_db
         .store()
         .query_timeless_component::<AutoSpaceViews>(&VIEWPORT_PATH.into())

examples/python/open_photogrammetry_format/README.md

@@ -0,0 +1,25 @@
+---
+title: Open Photogrammetry Format
+python: https://github.com/rerun-io/rerun/tree/latest/examples/python/open_photogrammetry_format/main.py
+tags: [2d, 3d, camera, photogrammetry]
+thumbnail: https://static.rerun.io/20716c6a10ffaa3960a212673adcbfff36da682e_open_photogrammetry_format_480w.png
+---
+
+<picture>
+  <source media="(max-width: 480px)" srcset="https://static.rerun.io/20716c6a10ffaa3960a212673adcbfff36da682e_open_photogrammetry_format_480w.png">
+  <source media="(max-width: 768px)" srcset="https://static.rerun.io/ed4a35b86775020956963cd464a0b32278761345_open_photogrammetry_format_768w.png">
+  <source media="(max-width: 1024px)" srcset="https://static.rerun.io/832c4fe63b6abe665c5723e5664d80bf19e9c6e1_open_photogrammetry_format_1024w.png">
+  <source media="(max-width: 1200px)" srcset="https://static.rerun.io/3bb25c43fa2a4c367d036c27943812ebfe3e4d42_open_photogrammetry_format_1200w.png">
+  <img src="https://static.rerun.io/603d5605f9670889bc8bce3365f16b831fce1eb1_open_photogrammetry_format_full.png" alt="">
+</picture>
+
+
+Use [pyopf](https://github.com/Pix4D/pyopf) to load and display a photogrammetrically reconstructed 3D point cloud in the Open Photogrammetry Format (OPF).
+
+
+```bash
+pip install -r examples/python/open_photogrammetry_format/requirements.txt
+python examples/python/open_photogrammetry_format/main.py
+```
+
+Requires Python 3.10 or higher because of [pyopf](https://pypi.org/project/pyopf/).