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/annotate/aligned_dim.rs

@@ -225,6 +225,7 @@ impl CadCommand for AlignedDimensionCommand {
             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,
@@ -280,6 +281,7 @@ fn preview_aligned(p1: DVec3, p2: DVec3, dim_pt: DVec3) -> 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,

src/modules/annotate/angular_dim.rs

@@ -166,6 +166,7 @@ fn preview_wire(points: Vec<Vec3>) -> 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,

src/modules/annotate/diameter_dim.rs

@@ -197,6 +197,7 @@ fn preview_line(a: Vec3, b: Vec3) -> 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,

src/modules/annotate/dim_baseline.rs

@@ -185,6 +185,7 @@ impl CadCommand for DimBaselineCommand {
             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/annotate/dim_continue.rs

@@ -165,6 +165,7 @@ impl CadCommand for DimContinueCommand {
             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/annotate/dimjogline.rs

@@ -91,6 +91,7 @@ impl CadCommand for DimJogLineCommand {
             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/annotate/dimtedit.rs

@@ -108,6 +108,7 @@ impl CadCommand for DimTeditCommand {
             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/annotate/leader_cmd.rs

@@ -261,6 +261,7 @@ fn preview_wire(pts: &[Vec3], arrow_size: f32) -> 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,

src/modules/annotate/linear_dim.rs

@@ -242,6 +242,7 @@ fn preview_wire(points: Vec<DVec3>) -> 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,

src/modules/annotate/mleader_cmd.rs

@@ -232,6 +232,7 @@ fn preview_wire(pts: &[Vec3], arrow_size: f32) -> 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,

src/modules/annotate/mleader_edit.rs

@@ -467,6 +467,7 @@ fn preview_wire(pts: &[Vec3]) -> 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,

src/modules/annotate/ordinate_dim.rs

@@ -142,6 +142,7 @@ fn preview_wire(points: Vec<Vec3>) -> 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,

src/modules/annotate/qdim.rs

@@ -98,6 +98,7 @@ impl CadCommand for QdimCommand {
             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/annotate/radius_dim.rs

@@ -202,6 +202,7 @@ fn preview_wire(points: Vec<Vec3>) -> 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,

src/modules/annotate/table_cmd.rs

@@ -204,6 +204,7 @@ impl CadCommand for TableCommand {
                 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/annotate/tolerance_cmd.rs

@@ -108,6 +108,7 @@ impl CadCommand for ToleranceCommand {
             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,