public static SingleMaterialFFFSettings LastSettings;

    public Form1()
    {
        InitializeComponent();
    }

    private void button1_Click(object sender, EventArgs e)
    {
        CappedCylinderGenerator cylgen = new CappedCylinderGenerator()
        {
            BaseRadius = 10,
            TopRadius = 5,
            Height = 20,
            Slices = 32
        };
        DMesh3 mesh = cylgen.Generate().MakeDMesh();
        MeshTransforms.ConvertYUpToZUp(mesh);       // g3 meshes are usually Y-up

        // center mesh above origin
        AxisAlignedBox3d bounds = mesh.CachedBounds;
        Vector3d baseCenterPt = bounds.Center - bounds.Extents.z * Vector3d.AxisZ;
        MeshTransforms.Translate(mesh, -baseCenterPt);

        PrintMeshAssembly meshes = new PrintMeshAssembly();
        meshes.AddMesh(mesh);

        GenerateGCodeForMeshes(meshes);
    }

    static string GenerateGCodeForMeshes(PrintMeshAssembly meshes)
    {

        // configure settings
        //RepRapSettings settings = new RepRapSettings(RepRap.Models.Unknown);
        MakerbotSettings settings = new MakerbotSettings(Makerbot.Models.Replicator2);

        LastSettings = settings.CloneAs<SingleMaterialFFFSettings>();

        MeshPlanarSlicer slicer = new MeshPlanarSlicer()
        {
            LayerHeightMM = settings.LayerHeightMM
        };
        slicer.Add(meshes);
        PlanarSliceStack slices = slicer.Compute();

        SingleMaterialFFFPrintGenerator printGen =
            new SingleMaterialFFFPrintGenerator(meshes, slices, settings);
        if (printGen.Generate())
        {
            // export gcode
            GCodeFile gcode = printGen.Result;
            using (StreamWriter w = new StreamWriter("generated.gcode"))
            {
                StandardGCodeWriter writer = new StandardGCodeWriter();
                writer.WriteFile(gcode, w);
            }
        }
        return "";
    }
}

        CappedCylinderGenerator cylgen = new CappedCylinderGenerator() {
            BaseRadius = 10, TopRadius = 5, Height = 20, Slices = 32
        };
        DMesh3 mesh = cylgen.Generate().MakeDMesh();
        MeshTransforms.ConvertYUpToZUp(mesh);       // g3 meshes are usually Y-up

	public static DMesh3 ToDMesh3(this Mesh mesh) {
		DMesh3 result = new DMesh3();
		result.BeginUnsafeTrianglesInsert();

		var indices = mesh.GetIndices(0);
		var polygons = new List<Polygon>();
		var verts = mesh.vertices;
		for(int i = 0; i < indices.Length / 3; i++) {
			var v0 = verts[indices[i * 3 + 0]];
			var v1 = verts[indices[i * 3 + 1]];
			var v2 = verts[indices[i * 3 + 2]];
			result.AppendTriangle(
				result.AppendVertex(new Vector3d(v0.x, v0.y, v0.z)),
				result.AppendVertex(new Vector3d(v1.x, v1.y, v1.z)),
				result.AppendVertex(new Vector3d(v2.x, v2.y, v2.z))
			);
		}
		result.EndUnsafeTrianglesInsert();
		return result;
	}