perf(render): instance block geometry

Share source buffers across block placements and render nested content with GPU instance transforms.\n\nChunk silhouettes and compact mesh material data so large drawings stay under device buffer limits and remain responsive.

src/modules/draw/draw/attdef.rs

@@ -206,6 +206,7 @@ impl CadCommand for AttdefCommand {
             depth_override: None,
             fill_is_3d: false,
             fill_is_2d_solid: false,
+            render_instance: None,
             pick_tris: Vec::new(),
             pick_tris_low: Vec::new(),
             dash_from_start: false,

src/modules/draw/draw/hatch.rs

@@ -235,6 +235,7 @@ impl HatchCommand {
                 }]
             });
         HatchModel {
+            render_instance: None,
             boundary: std::sync::Arc::new(rel),
             pattern: HatchPattern::Pattern(families),
             name: pat_name.into(),
@@ -399,6 +400,7 @@ impl GradientCommand {
     fn make_hatch(&self, rings: Vec<Vec<[f64; 2]>>) -> HatchModel {
         let (rel, origin, wcs) = pack_rings(&rings);
         HatchModel {
+            render_instance: None,
             boundary: std::sync::Arc::new(rel),
             pattern: HatchPattern::Gradient {
                 angle_deg: 0.0,
@@ -614,6 +616,7 @@ impl CadCommand for BoundaryCommand {
                 // Store as a Hatch entity (solid fill) so it is selectable.
                 let (rel, origin, wcs) = pack_rings(&rings);
                 let model = HatchModel {
+                    render_instance: None,
                     boundary: std::sync::Arc::new(rel),
                     pattern: HatchPattern::Solid,
                     name: "SOLID".into(),

src/modules/draw/draw/mline.rs

@@ -186,6 +186,7 @@ impl CadCommand for MlineCommand {
             depth_override: None,
             fill_is_3d: false,
             fill_is_2d_solid: false,
+            render_instance: None,
             pick_tris: Vec::new(),
             pick_tris_low: Vec::new(),
             dash_from_start: false,

src/modules/draw/draw/raster_image.rs

@@ -128,6 +128,7 @@ impl CadCommand for ImageCommand {
             depth_override: None,
             fill_is_3d: false,
             fill_is_2d_solid: false,
+            render_instance: None,
             pick_tris: Vec::new(),
             pick_tris_low: Vec::new(),
             dash_from_start: false,

src/modules/draw/draw/ray.rs

@@ -90,6 +90,7 @@ impl CadCommand for RayCommand {
             depth_override: None,
             fill_is_3d: false,
             fill_is_2d_solid: false,
+            render_instance: None,
             pick_tris: Vec::new(),
             pick_tris_low: Vec::new(),
             dash_from_start: false,
@@ -189,6 +190,7 @@ impl CadCommand for XLineCommand {
             depth_override: None,
             fill_is_3d: false,
             fill_is_2d_solid: false,
+            render_instance: None,
             pick_tris: Vec::new(),
             pick_tris_low: Vec::new(),
             dash_from_start: false,

src/modules/draw/draw/revcloud.rs

@@ -108,6 +108,7 @@ impl CadCommand for RevCloudCommand {
             depth_override: None,
             fill_is_3d: false,
             fill_is_2d_solid: false,
+            render_instance: None,
             pick_tris: Vec::new(),
             pick_tris_low: Vec::new(),
             dash_from_start: false,

src/modules/draw/inquiry/area.rs

@@ -367,6 +367,7 @@ impl CadCommand for AreaCommand {
             depth_override: None,
             fill_is_3d: false,
             fill_is_2d_solid: false,
+            render_instance: None,
             pick_tris: Vec::new(),
             pick_tris_low: Vec::new(),
             dash_from_start: false,

src/modules/draw/inquiry/dist.rs

@@ -90,6 +90,7 @@ impl CadCommand for DistCommand {
             depth_override: None,
             fill_is_3d: false,
             fill_is_2d_solid: false,
+            render_instance: None,
             pick_tris: Vec::new(),
             pick_tris_low: Vec::new(),
             dash_from_start: false,

src/modules/draw/inquiry/measuregeom.rs

@@ -75,6 +75,7 @@ impl MeasureGeomCommand {
             depth_override: None,
             fill_is_3d: false,
             fill_is_2d_solid: false,
+            render_instance: None,
             pick_tris: Vec::new(),
             pick_tris_low: Vec::new(),
             dash_from_start: false,

src/modules/draw/modify/trim.rs

@@ -3713,6 +3713,7 @@ fn preview_wire(points: Vec<[f32; 3]>, color: [f32; 4], name: &str) -> WireModel
         depth_override: None,
         fill_is_3d: false,
         fill_is_2d_solid: false,
+        render_instance: None,
         pick_tris: Vec::new(),
         pick_tris_low: Vec::new(),
         dash_from_start: false,