Separate crate for tensor space view (#2334)

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### What

Moves the last Space View to the new Space View framework and a separate
crate.
One of the last pieces of #2249 

Detangles viewport from all concrete Space Views:
`cargo depgraph --all-deps --workspace-only --all-features
--dedup-transitive-deps | dot -Tpng > deps.png`

![deps](https://github.com/rerun-io/rerun/assets/1220815/c5996f26-fd31-461b-9043-484ec2fb7637)


### 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)

<!-- This line will get updated when the PR build summary job finishes.
-->
PR Build Summary: https://build.rerun.io/pr/2334

<!-- pr-link-docs:start -->
Docs preview: https://rerun.io/preview/89dd232/docs
Examples preview: https://rerun.io/preview/89dd232/examples
<!-- pr-link-docs:end -->

Cargo.toml

@@ -47,6 +47,7 @@ re_smart_channel = { path = "crates/re_smart_channel", version = "0.7.0-alpha.0"
 re_space_view = { path = "crates/re_space_view", version = "0.7.0-alpha.0", default-features = false }
 re_space_view_bar_chart = { path = "crates/re_space_view_bar_chart", version = "0.7.0-alpha.0", default-features = false }
 re_space_view_spatial = { path = "crates/re_space_view_spatial", version = "0.7.0-alpha.0", default-features = false }
+re_space_view_tensor = { path = "crates/re_space_view_tensor", version = "0.7.0-alpha.0", default-features = false }
 re_space_view_text = { path = "crates/re_space_view_text", version = "0.7.0-alpha.0", default-features = false }
 re_space_view_text_box = { path = "crates/re_space_view_text_box", version = "0.7.0-alpha.0", default-features = false }
 re_space_view_time_series = { path = "crates/re_space_view_time_series", version = "0.7.0-alpha.0", default-features = false }

crates/re_space_view_tensor/Cargo.toml

@@ -0,0 +1,41 @@
+[package]
+authors.workspace = true
+description = "A Space View dedicated to visualizing tensors with arbitrary dimensionality."
+edition.workspace = true
+homepage.workspace = true
+license.workspace = true
+name = "re_space_view_tensor"
+publish = true
+readme = "README.md"
+repository.workspace = true
+rust-version.workspace = true
+version.workspace = true
+include = ["../../LICENSE-APACHE", "../../LICENSE-MIT", "**/*.rs", "Cargo.toml"]
+
+[package.metadata.docs.rs]
+all-features = true
+
+[dependencies]
+re_arrow_store.workspace = true
+re_components.workspace = true
+re_data_store.workspace = true
+re_data_ui.workspace = true
+re_log_types.workspace = true
+re_log.workspace = true
+re_renderer.workspace = true
+re_space_view.workspace = true
+re_tensor_ops.workspace = true
+re_tracing.workspace = true
+re_ui.workspace = true
+re_viewer_context.workspace = true
+
+anyhow.workspace = true
+ahash.workspace = true
+bytemuck.workspace = true
+eframe.workspace = true
+egui.workspace = true
+half.workspace = true
+ndarray.workspace = true
+thiserror.workspace = true
+vec1.workspace = true
+wgpu.workspace = true

crates/re_space_view_tensor/README.md

@@ -0,0 +1,11 @@
+# re_space_view_tensor
+
+Part of the [`rerun`](https://github.com/rerun-io/rerun) family of crates.
+
+[![Latest version](https://img.shields.io/crates/v/re_space_view_tensor.svg)](https://crates.io/crates/re_space_view_tensor)
+[![Documentation](https://docs.rs/re_space_view_tensor/badge.svg)](https://docs.rs/re_space_view_tensor)
+![MIT](https://img.shields.io/badge/license-MIT-blue.svg)
+![Apache](https://img.shields.io/badge/license-Apache-blue.svg)
+
+A Space View dedicated to visualizing tensors with arbitrary dimensionality.
+

crates/re_space_view_tensor/src/lib.rs

@@ -0,0 +1,10 @@
+//! Rerun tensor Space View.
+//!
+//! A Space View dedicated to visualizing tensors with arbitrary dimensionality.
+
+mod scene_part;
+mod space_view_class;
+mod tensor_dimension_mapper;
+mod tensor_slice_to_gpu;
+
+pub use space_view_class::TensorSpaceView;

crates/re_viewport/src/view_tensor/scene.rs → crates/re_space_view_tensor/src/scene_part.rs

@@ -1,17 +1,33 @@
 use re_arrow_store::LatestAtQuery;
-use re_components::{DecodedTensor, InstanceKey, Tensor};
+use re_components::{DecodedTensor, Tensor};
 use re_data_store::{EntityPath, EntityProperties, InstancePath};
-use re_viewer_context::{SceneQuery, TensorDecodeCache, ViewerContext};
+use re_log_types::{Component as _, InstanceKey};
+use re_viewer_context::{
+    ArchetypeDefinition, ScenePart, SceneQuery, SpaceViewClass, SpaceViewHighlights,
+    TensorDecodeCache, ViewerContext,
+};
 
-/// A tensor scene, with everything needed to render it.
+use crate::TensorSpaceView;
+
+/// A bar chart scene, with everything needed to render it.
 #[derive(Default)]
 pub struct SceneTensor {
     pub tensors: std::collections::BTreeMap<InstancePath, DecodedTensor>,
 }
 
-impl SceneTensor {
-    /// Loads all tensors into the scene according to the given query.
-    pub(crate) fn load(&mut self, ctx: &mut ViewerContext<'_>, query: &SceneQuery<'_>) {
+impl ScenePart<TensorSpaceView> for SceneTensor {
+    fn archetype(&self) -> ArchetypeDefinition {
+        vec1::vec1![Tensor::name()]
+    }
+
+    fn populate(
+        &mut self,
+        ctx: &mut ViewerContext<'_>,
+        query: &SceneQuery<'_>,
+        _state: &<TensorSpaceView as SpaceViewClass>::State,
+        _scene_context: &<TensorSpaceView as SpaceViewClass>::Context,
+        _highlights: &SpaceViewHighlights,
+    ) -> Vec<re_renderer::QueueableDrawData> {
         re_tracing::profile_function!();
 
         let store = &ctx.store_db.entity_db.data_store;
@@ -23,8 +39,12 @@ impl SceneTensor {
                 self.load_tensor_entity(ctx, ent_path, &props, tensor);
             }
         }
+
+        Vec::new()
     }
+}
 
+impl SceneTensor {
     fn load_tensor_entity(
         &mut self,
         ctx: &mut ViewerContext<'_>,