fix(demos): the machining demos dispose their LocalProjectService before LocalApp.AppEnd -- DemoUseMachiningProject, DemoBuildMachiningProject and DemoBuildGeomOnlyMachiningProject ended with machiningProject.Dispose(); LocalApp.AppEnd();, so the service was never disposed: MachiningProject.Dispose releases only the project's TimeMapping, while the service's machining runner keeps its threads, its native pipeline, the strip and the workpiece tree, everything AppEnd's documentation asks to be gone before it ends the native core. Each demo now disposes the service right after the project, one line with a comment saying why; not a using declaration, which would dispose it after AppEnd.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

Disp/DemoSatellite.cs

@@ -6,7 +6,7 @@ namespace Sample.Disp
     /// <summary>
     /// Demonstrates a simple solar system animation using <see cref="IDisplayee"/> interface.
     /// Shows how to create a hierarchical transform structure with sun, earth and moon using
-    /// <see cref="Mat4d"/> matrices and model matrix stack transformations.
+    /// <see cref="mat4d_t"/> matrices and model matrix stack transformations.
     /// </summary>
     /// <remarks>
     /// ### Source Code
@@ -30,12 +30,12 @@ namespace Sample.Disp
 		{
 			sun.Display(bind);
 			bind.ModelMatStack.Push();
-			bind.ModelMatStack.Mul(new Mat4d(new AxisAngle4d(new vec3d_t(0, 0, 1), angle_earth += 0.03)));
-			bind.ModelMatStack.Mul(new Mat4d(new vec3d_t(12, 0, 0)));
+			bind.ModelMatStack.Mul(new mat4d_t(new AxisAngle4d(new vec3d_t(0, 0, 1), angle_earth += 0.03)));
+			bind.ModelMatStack.Mul(new mat4d_t(new vec3d_t(12, 0, 0)));
 			earth.Display(bind);
 			bind.ModelMatStack.Push();
-			bind.ModelMatStack.Mul(new Mat4d(new AxisAngle4d(new vec3d_t(0, 0, 1), angle_moon += 0.02)));
-			bind.ModelMatStack.Mul(new Mat4d(new vec3d_t(4, 0, 0)));
+			bind.ModelMatStack.Mul(new mat4d_t(new AxisAngle4d(new vec3d_t(0, 0, 1), angle_moon += 0.02)));
+			bind.ModelMatStack.Mul(new mat4d_t(new vec3d_t(4, 0, 0)));
 			moon.Display(bind);
 			bind.ModelMatStack.Pop();
 			bind.ModelMatStack.Pop();

Geom/DemoBuildGeom.cs

@@ -22,7 +22,7 @@ public static class DemoBuildGeom
 	/// <returns>A list of geometries implementing the IGetStl interface</returns>
 	public static List<IGetStl> GenGeoms()
 	{
-		box3d_t box = new box3d_t(0, 0, -50, 70, 50, 0);
+		Box3d box = new Box3d(0, 0, -50, 70, 50, 0);
 		Cylindroid cylindroid = new Cylindroid([ new PairZr(0,12),new PairZr(20,12),
 								new PairZr(20,16),new PairZr(30,16)]);
 		Stl stl = new Stl("geom.stl");

MachineTool/DemoBuildMachineTool.cs

@@ -43,6 +43,9 @@ namespace Sample.MachineTool
                 "[O][Y][X][C][w];[O][Z][B][S][t]");
             if (dst.ToolMountTransformer is StaticTranslation st)
                 st.Trans = new vec3d_t(-72.40, 72.40, 176.44);
+            //the spindle turns the tool about its own axis: the rotation's pivot
+            //sits on the tool mount's origin, where the offset above moved it.
+            dst.SpindleTransformer.Pivot = new vec3d_t(-72.40, 72.40, 176.44);
             dst.TransformerB.Pivot = new vec3d_t(-72.4, -177.4, 225.94);
             Dictionary<string, Solid> solidMap = new Dictionary<string, Solid>()
             {

Machining/DemoBuildGeomOnlyMachiningProject.cs

@@ -74,7 +74,7 @@ public static class DemoBuildGeomOnlyMachiningProject
 		//geometry anchor to each mount, so the workpiece mount is placed by the
 		//transformer of the branch to it: on top of the 10 mm thick fixture geom.
 		Fixture fixture = Fixture.CreateDefault();
-		fixture.Geom = new box3d_t(new vec3d_t(-40, -40, 0), new vec3d_t(40, 40, 10));
+		fixture.Geom = new Box3d(new vec3d_t(-40, -40, 0), new vec3d_t(40, 40, 10));
 		Branch.Get(fixture.GeomAnchor, fixture.WorkpieceMount).Transformer
 			= new StaticTranslation(new vec3d_t(0, 0, 10));
 		localProjectService.Fixture = fixture;
@@ -83,7 +83,7 @@ public static class DemoBuildGeomOnlyMachiningProject
 		//mount and to program zero by zero translations.
 		Workpiece workpiece = Workpiece.CreateDefault();
 		workpiece.InitResolution = 0.25;
-		workpiece.InitGeom = new box3d_t(0, 0, -50, 70, 50, 0);
+		workpiece.InitGeom = new Box3d(0, 0, -50, 70, 50, 0);
 		workpiece.IdealGeom = null;
 		localProjectService.Workpiece = workpiece;
 
@@ -96,6 +96,8 @@ public static class DemoBuildGeomOnlyMachiningProject
 		localProjectService.SaveProject();
 
 		machiningProject.Dispose();
+		//the service holds the play threads, the strip and the cut workpiece tree: dispose it before AppEnd
+		localProjectService.Dispose();
 		LocalApp.AppEnd();
 	}
 

Machining/DemoBuildMachiningProject.cs

@@ -187,7 +187,7 @@ public static class DemoBuildMachiningProject
 		//geometry anchor to each mount, so the workpiece mount is placed by the
 		//transformer of the branch to it: on top of the 10 mm thick fixture geom.
 		Fixture fixture = Fixture.CreateDefault();
-		fixture.Geom = new box3d_t(new vec3d_t(-40, -40, 0), new vec3d_t(40, 40, 10));
+		fixture.Geom = new Box3d(new vec3d_t(-40, -40, 0), new vec3d_t(40, 40, 10));
 		Branch.Get(fixture.GeomAnchor, fixture.WorkpieceMount).Transformer
 			= new StaticTranslation(new vec3d_t(0, 0, 10));
 		localProjectService.Fixture = fixture;
@@ -198,7 +198,7 @@ public static class DemoBuildMachiningProject
 		//mount and to program zero by zero translations.
 		Workpiece workpiece = Workpiece.CreateDefault();
 		workpiece.InitResolution = 0.25;
-		workpiece.InitGeom = new box3d_t(0, 0, -50, 70, 50, 0);
+		workpiece.InitGeom = new Box3d(0, 0, -50, 70, 50, 0);
 		workpiece.IdealGeom = null;
 		workpiece.CuttingPara = XFactory.GenByFile<ICuttingPara>(
 			"Resource/CuttingParameter", "Al6061T6.default.mp", progress);
@@ -216,6 +216,8 @@ public static class DemoBuildMachiningProject
 		machiningProject.MakeXmlSourceToFile(projectPath);
 
 		machiningProject.Dispose();
+		//the service holds the play threads, the strip and the cut workpiece tree: dispose it before AppEnd
+		localProjectService.Dispose();
 		LocalApp.AppEnd();
 	}
 	#endregion

Machining/DemoUseMachiningProject.cs

@@ -85,6 +85,8 @@ public static class DemoUseMachiningProject
 		#region CleanupResources
 		Console.WriteLine($"Close Project: {projectPath}");
 		machiningProject.Dispose();
+		//the service holds the play threads, the strip and the cut workpiece tree: dispose it before AppEnd
+		localProjectService.Dispose();
 
 		LocalApp.AppEnd();
 

Mech/DemoTopo1.cs

@@ -44,9 +44,9 @@ public static class DemoTopo1
 		brnB.Step = MathUtil.ToRad(-60);
 
 		//Get and show the transform matrices relative to O.
-		Dictionary<Anchor, Mat4d> matMap = asmb.GetMat4dMap(O);
+		Dictionary<Anchor, mat4d_t> matMap = asmb.GetMat4dMap(O);
 		Console.WriteLine("Transform Matrix relative to O:");
-		foreach (KeyValuePair<Anchor, Mat4d> keyValue in matMap)
+		foreach (KeyValuePair<Anchor, mat4d_t> keyValue in matMap)
 			Console.WriteLine($"{keyValue.Key.Name} : {keyValue.Value}");
 		#endregion