TIN Surface Edit

Commands

TINEDIT

Overview

In BricsCAD, points, breaklines and boundaries on a triangulated irregular network (TIN) surface can be added or removed using the TINEDIT command.

The following entities represent features on a TIN surface:
  • Points contain x y coordinates, and z values. All points are used to make a connection with the two nearest neighbors to create triangles. The surface triangulation is based on the Delaunay algorithm, which ensures that no point is inside the circumcircle of any triangle.
  • Breaklines represent linear infrastructure features like curbs, retaining walls, etc. These lines also define the edges of triangles. Breaklines can be created from linear entities such as line, polyline, arc, circle.
  • Boundaries are the features to define bounded 3D surfaces. The surface boundaries can be created with closed polylines. Defining outer boundaries on a large 3D surface improves the performance of a TIN Surface plan.

Adding points to a toposurface

  1. Open a TIN surface with surface points (1)


  2. Select the TIN surface and launch the TINEDIT command.
  3. Click on an area to add points to the surface.
    Note:
    • The value is calculated as an interpolated elevation for selected point inside triangle (2,3,4).
    • If ESNAP is ON, you can check the elevation of a point in the cursor coordinate.


  4. To specify the elevation of the newly added point, type an elevation value in the Command line, and press Enter.
  5. Keep adding points to the surface, or press Enter to exit the command. The new surface point (5) is added from entities, such as polylines vertices.


Adding breaklines to a toposurface

  1. Open a TIN surface (6).


  2. Select the TIN surface and launch the TINEDIT command.
  3. Select Add Breaklines or type AB in the Command line.


    Note: The retaining wall breaklines before adding breaklines to the surface (7).
  4. Select the breaklines you want to add. This will modify the surface according to the selected breakline (8).
    Note: If the breakline is moved, the surface will be updated automatically.


Adding boundaries to a toposurface

  1. Open a TIN surface where you want to create a boundary (9).


  2. Create a closed boundary on the location where you want to clip the surface (10).
    Note: Make sure that Entity Snap Tracking (ESNAP) is active.


  3. Select the TIN surface and launch the TINEDIT command.
  4. Select Add Boundaries in the Command line.
  5. Click on the closed boundary to use in the surface boundary definition and press Enter.
    Note:
    • By default, the outer option is selected, which allows creating an outer surface boundary (11).


    • Select the bounding entity (12) (e.g. polyline) to resize the surface boundary. Moving the grip (13) of the entity changes the surface dynamically (14).


    • Select the hide option to exclude a part of the surface from the TIN when calculating the total area.
    • Select the show option to reveal the hidden surface in the TIN.


    • The hidden part according to the closed boundary (15) is shown, the surface of the hidden part revealed (16) using the show option.