Fix viewport dimension acquisition and preserve measurement scaling

src/modules/annotate/aligned_dim.rs

@@ -167,6 +167,17 @@ impl CadCommand for AlignedDimensionCommand {
         true
     }
 
+    fn dimension_acquired_points(&self) -> Vec<DVec3> {
+        match self.step {
+            Step::First => vec![], Step::Second(p) => vec![p],
+            Step::DimLine { p1, p2 } => vec![p1, p2],
+        }
+    }
+
+    fn dimension_placement_pending(&self) -> bool {
+        matches!(self.step, Step::DimLine { .. })
+    }
+
     fn input_kind(&self) -> InputKind {
         if self.awaiting_text {
             InputKind::FreeText

src/modules/annotate/angular_dim.rs

@@ -488,6 +488,20 @@ impl CadCommand for AngularDimensionCommand {
         true
     }
 
+    fn dimension_acquired_points(&self) -> Vec<DVec3> {
+        match self.step {
+            Step::Vertex => vec![], Step::FirstRay(p) => vec![p],
+            Step::SecondRay { vertex, first } | Step::CircleSecondRay { vertex, first, .. } => vec![vertex, first],
+            Step::SecondLine { first_start, first_end, .. } => vec![first_start, first_end],
+            Step::ArcPoint3 { vertex, first, second } => vec![vertex, first, second],
+            Step::ArcPoint2 { first_start, first_end, second_start, second_end } => vec![first_start, first_end, second_start, second_end],
+        }
+    }
+
+    fn dimension_placement_pending(&self) -> bool {
+        matches!(self.step, Step::ArcPoint3 { .. } | Step::ArcPoint2 { .. })
+    }
+
     fn on_escape(&mut self) -> CmdResult {
         CmdResult::Cancel
     }

src/modules/annotate/diameter_dim.rs

@@ -138,6 +138,16 @@ impl CadCommand for DiameterDimensionCommand {
         true
     }
 
+    fn dimension_acquired_points(&self) -> Vec<DVec3> {
+        match self.step {
+            Step::SelectObject => vec![], Step::DimLine(source) => vec![dvec(source.point_at_angle(source.start_angle))],
+        }
+    }
+
+    fn dimension_placement_pending(&self) -> bool {
+        matches!(self.step, Step::DimLine(_))
+    }
+
     fn on_escape(&mut self) -> CmdResult {
         CmdResult::Cancel
     }

src/modules/annotate/linear_dim.rs

@@ -223,6 +223,17 @@ impl CadCommand for LinearDimensionCommand {
         true
     }
 
+    fn dimension_acquired_points(&self) -> Vec<DVec3> {
+        match self.step {
+            Step::FirstPoint => vec![], Step::SecondPoint(p) => vec![p],
+            Step::DimensionLine { first, second } => vec![first, second],
+        }
+    }
+
+    fn dimension_placement_pending(&self) -> bool {
+        matches!(self.step, Step::DimensionLine { .. })
+    }
+
     fn on_escape(&mut self) -> CmdResult {
         CmdResult::Cancel
     }

src/modules/annotate/radius_dim.rs

@@ -136,6 +136,16 @@ impl CadCommand for RadiusDimensionCommand {
         true
     }
 
+    fn dimension_acquired_points(&self) -> Vec<DVec3> {
+        match self.step {
+            Step::SelectObject => vec![], Step::DimLine(source) => vec![dvec(source.point_at_angle(source.start_angle))],
+        }
+    }
+
+    fn dimension_placement_pending(&self) -> bool {
+        matches!(self.step, Step::DimLine(_))
+    }
+
     fn on_escape(&mut self) -> CmdResult {
         CmdResult::Cancel
     }