distance to tunnel center

The distance to tunnel center module is similar to the distance to surface module in that it receives any 3D field into its left input port, BUT instead of a surface, it receives a line (along the trajectory of a tunnel, boring or mineshaft) into its right input port. The distance to tunnel center module then cuts a cylinder, of user defined radius, along the line trajectory. The algorithm is identical in concept to distance to surface in that it adds a data component to the input 3D field referencing the distance from the line (trajectory). With this new data component you can use a subsetting module like plume_volume to pass either portion of the 3D field (inside the cylinder or outside the cylinder), thereby allowing cutting tunnels along any trajectory. The trajectory line can originate from any one of a number of sources such read_lines, import cad or import vector gis.

The general approach is to subset the distance to tunnel center data component with either constant_shellor plume_volume. The choice of 1.0 for the subsetting level will result in cutting AT the user radius, while less than 1.0 is inside the cylinder wall and greater than 1.0 is outside the cylinder wall.

Module Input Ports

• Input Field [Field] Accepts a data field.
• Input Tunnel Line [Field] Accepts a field with the surface to cut the input volume/surface

Module Output Ports

• Output Field [Field] Outputs the field with distance to tunnel line data to allow subsetting