Chunkified, deserialization-free LineStrip visualizers

[teh-cmc]

Title!

This introduces a new neat zero-deser zero-copy helper for array list (which should be the last one, we've covered everything!).

• DNM: requires Chunkified, (almost)deserialization-free Mesh/Asset visualizers #7016

---

LineStrips2D

rerun/crates/viewer/re_space_view_spatial/src/visualizers/lines2d.rs

Lines 187 to 260 in beeb939

	super::entity_iterator::process_archetype2::<Self, LineStrips2D, _>(
	ctx,
	view_query,
	context_systems,
	|ctx, spatial_ctx, results| {
	use re_space_view::RangeResultsExt2 as _;
	let Some(all_strip_chunks) = results.get_required_chunks(&LineStrip2D::name())
	else {
	return Ok(());
	};
	let num_strips = all_strip_chunks
	.iter()
	.flat_map(|chunk| {
	chunk.iter_primitive_array_list::<2, f32>(&LineStrip2D::name())
	})
	.map(|strips| strips.len())
	.sum();
	if num_strips == 0 {
	return Ok(());
	}
	line_builder.reserve_strips(num_strips)?;
	let num_vertices = all_strip_chunks
	.iter()
	.flat_map(|chunk| {
	chunk.iter_primitive_array_list::<2, f32>(&LineStrip2D::name())
	})
	.map(|strips| strips.iter().map(|strip| strip.len()).sum::<usize>())
	.sum::<usize>();
	line_builder.reserve_vertices(num_vertices)?;
	let timeline = ctx.query.timeline();
	let all_strips_indexed = all_strip_chunks.iter().flat_map(|chunk| {
	itertools::izip!(
	chunk.iter_component_indices(&timeline, &LineStrip2D::name()),
	chunk.iter_primitive_array_list::<2, f32>(&LineStrip2D::name())
	)
	});
	let all_colors = results.iter_as(timeline, Color::name());
	let all_radii = results.iter_as(timeline, Radius::name());
	let all_labels = results.iter_as(timeline, Text::name());
	let all_class_ids = results.iter_as(timeline, ClassId::name());
	let all_keypoint_ids = results.iter_as(timeline, KeypointId::name());
	let data = re_query2::range_zip_1x5(
	all_strips_indexed,
	all_colors.primitive::<u32>(),
	all_radii.primitive::<f32>(),
	all_labels.string(),
	all_class_ids.primitive::<u16>(),
	all_keypoint_ids.primitive::<u16>(),
	)
	.map(
	|(_index, strips, colors, radii, labels, class_ids, keypoint_ids)| {
	Lines2DComponentData {
	strips,
	colors: colors.map_or(&[], |colors| bytemuck::cast_slice(colors)),
	radii: radii.map_or(&[], |radii| bytemuck::cast_slice(radii)),
	labels: labels.unwrap_or_default(),
	class_ids: class_ids
	.map_or(&[], |class_ids| bytemuck::cast_slice(class_ids)),
	keypoint_ids: keypoint_ids
	.map_or(&[], |keypoint_ids| bytemuck::cast_slice(keypoint_ids)),
	}
	},
	);
	self.process_data(ctx, &mut line_builder, view_query, spatial_ctx, data);
	Ok(())
	},
	)?;

LineStrips3D

rerun/crates/viewer/re_space_view_spatial/src/visualizers/lines3d.rs

Lines 192 to 265 in beeb939

	super::entity_iterator::process_archetype2::<Self, LineStrips3D, _>(
	ctx,
	view_query,
	context_systems,
	|ctx, spatial_ctx, results| {
	use re_space_view::RangeResultsExt2 as _;
	let Some(all_strip_chunks) = results.get_required_chunks(&LineStrip3D::name())
	else {
	return Ok(());
	};
	let num_strips = all_strip_chunks
	.iter()
	.flat_map(|chunk| {
	chunk.iter_primitive_array_list::<3, f32>(&LineStrip3D::name())
	})
	.map(|strips| strips.len())
	.sum();
	if num_strips == 0 {
	return Ok(());
	}
	line_builder.reserve_strips(num_strips)?;
	let num_vertices = all_strip_chunks
	.iter()
	.flat_map(|chunk| {
	chunk.iter_primitive_array_list::<3, f32>(&LineStrip3D::name())
	})
	.map(|strips| strips.iter().map(|strip| strip.len()).sum::<usize>())
	.sum::<usize>();
	line_builder.reserve_vertices(num_vertices)?;
	let timeline = ctx.query.timeline();
	let all_strips_indexed = all_strip_chunks.iter().flat_map(|chunk| {
	itertools::izip!(
	chunk.iter_component_indices(&timeline, &LineStrip3D::name()),
	chunk.iter_primitive_array_list::<3, f32>(&LineStrip3D::name())
	)
	});
	let all_colors = results.iter_as(timeline, Color::name());
	let all_radii = results.iter_as(timeline, Radius::name());
	let all_labels = results.iter_as(timeline, Text::name());
	let all_class_ids = results.iter_as(timeline, ClassId::name());
	let all_keypoint_ids = results.iter_as(timeline, KeypointId::name());
	let data = re_query2::range_zip_1x5(
	all_strips_indexed,
	all_colors.primitive::<u32>(),
	all_radii.primitive::<f32>(),
	all_labels.string(),
	all_class_ids.primitive::<u16>(),
	all_keypoint_ids.primitive::<u16>(),
	)
	.map(
	|(_index, strips, colors, radii, labels, class_ids, keypoint_ids)| {
	Lines3DComponentData {
	strips,
	colors: colors.map_or(&[], |colors| bytemuck::cast_slice(colors)),
	radii: radii.map_or(&[], |radii| bytemuck::cast_slice(radii)),
	labels: labels.unwrap_or_default(),
	class_ids: class_ids
	.map_or(&[], |class_ids| bytemuck::cast_slice(class_ids)),
	keypoint_ids: keypoint_ids
	.map_or(&[], |keypoint_ids| bytemuck::cast_slice(keypoint_ids)),
	}
	},
	);
	self.process_data(ctx, &mut line_builder, view_query, spatial_ctx, data);
	Ok(())
	},
	)?;

---

Checklist

• I have read and agree to Contributor Guide and the Code of Conduct
• I've included a screenshot or gif (if applicable)
• I have tested the web demo (if applicable):
  • Using examples from latest main build: rerun.io/viewer
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• If applicable, add a new check to the release checklist!
• If have noted any breaking changes to the log API in CHANGELOG.md and the migration guide

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[Wumpf]

nice!

[Wumpf]

ahhh the delight of primitive types 😁