Fix revolve angle and wireframe display

src/app/commands/display.rs

@@ -796,7 +796,8 @@ impl OpenCADStudio {
                 use crate::modules::insert::solid3d_cmds::RevolveCommand;
                 let selected: Vec<_> = self.tabs[i].scene.selected_entities().into_iter().collect();
                 let color = self.tabs[i].scene.layer_color(&self.tabs[i].active_layer);
-                let mut cmd = RevolveCommand::new(color);
+                let isolines = self.tabs[i].scene.document.header.isolines.max(0) as usize;
+                let mut cmd = RevolveCommand::new(color, isolines);
                 if !selected.is_empty() {
                     cmd.set_preselection(
                         selected

src/app/model_ops.rs

@@ -36,7 +36,13 @@ impl super::OpenCADStudio {
             return Handle::NULL;
         };
         self.tabs[i].scene.create_solid_history(handle, history);
-        self.tabs[i].scene.register_solid_model(handle, solid);
+        if !self.tabs[i].scene.register_solid_model(handle, solid) {
+            // A command result is not successful until it has renderable
+            // geometry. Roll the new entity back so DELOBJ cannot consume a
+            // visible source in exchange for an invisible result.
+            self.tabs[i].scene.rollback_new_entities(&[handle]);
+            return Handle::NULL;
+        }
         handle
     }
 
@@ -63,7 +69,10 @@ impl super::OpenCADStudio {
         let Some(handle) = self.commit_entity_handle(entity) else {
             return Handle::NULL;
         };
-        self.tabs[i].scene.register_solid_model(handle, surface);
+        if !self.tabs[i].scene.register_solid_model(handle, surface) {
+            self.tabs[i].scene.rollback_new_entities(&[handle]);
+            return Handle::NULL;
+        }
         handle
     }