When you create a mesh, Mesh Buildup Wizard is typically used. If scan data consists of line type point clouds, then it is not easy to maintain the original shape of its boundaries while generating the mesh.

If you use the manual way of using 3D triangulation command in the Addins menu, you will get better result than the automatic way of using Mesh Buildup Wizard as shown in the image below.

Results from Mesh Buildup Wizard (image above)

Results from 3D triangulation in Add-ins (image above)

Method
1. When you apply triangulation with line type scan data which is already aligned by a scan device, accurately align scan sets again in the software. Select the Align button in the bottom pallet menu, or Click Tools > Scan Tools > Align in the menu.

Use the Global And Fine method with Apply Only Small Transform option as shown in the below image. This option considers that initial alignment is already done and accurately aligns scan shots removing gaps among scan shots by small transformation. And also if overlapped regions have planar shape, its alignment may slide along the planar area. This option prevents featureless scan shots from sliding during alignment.

2. Apply Addins > Combine command to make a single scan data.

3. Click the Addins > 3D Triangulate in the menu and check Assume Vertices Are Densely Placed Along A Direction option. Especially, when you try to triangulate line type point cloud, this option is appropriate for keeping edges or boundaries as it is as shown in the below image.

4. If necessary, execute the Enhance, Global Remesh and Fix Normal command in Mesh mode to get a mesh which is well optimized and featured.

When you create a mesh, you typically use the Mesh Buildup Wizard. If scan data is constituted by line-type point clouds, however, boundaries are not easy to maintain in their original shape while you generate the mesh.

If you manually triangulate using the 3D Triangulation command in the Addins menu, you will get better a result than the automatic Mesh Buildup Wizard method, as shown in the image below.

Method:
1. Before you apply triangulation on line-type scan data which is already aligned by a scan device, we recommend that you accurately align the scan sets again in the software. Select the Align button in the bottom pallet menu, or Click Tools > Scan Tools > Align in the menu.

Use the Global And Fine method with the “Apply Only Small Transform” option as shown in the below image. This option considers that the initial alignment is already done and accurately aligns scan shots, removing gaps among scan shots via small transformations. Plus, if overlapped regions have a planar shape, the alignment may slide along the planar area. This option prevents such featureless scan shots from sliding during alignment.

2. Apply the Addins > Combine command to make a single scan data set.

3. Click Add-ins > 3D Triangulate in the menu and check the “Assume Vertices Are Densely Placed Along A Direction” option. Especially, when you try to triangulate line type point cloud, this option is appropriate for keeping edges or boundaries as shown in the below image.

4. If necessary, execute the Enhance, Global Remesh and Fix Normal commands in Mesh mode to get a mesh which is well optimized and featured.