Overview

Shaft transformation windows provide you with a transformed view of design data and models that gives a flattened 2D view of the walls of an essentially cylindrical object, such as a mine shaft or inclined drift.

The shaft transformation windows use a different coordinate mapping than normal windows. The bearing in a shaft window is mapped to the X axis, the level or depth above or below datum is mapped to the Y axis, and the distance from the shaft or drift centre line is mapped to the Z axis.

The following should be taken into consideration when editing in a shaft transformation window:

• Closed polygons in an orthogonal 3D window appear as open polygons in a shaft window. However, when editing these lines, the closed connection displays whenever the line becomes highlighted.
• Coincident points on each side of the shaft window are not required and will cause problems when the object is transferred to an orthogonal 3D window, that is, duplicate points will be formed.
• Points either inserted in an existing object or those of a new object will have the default Z value of the shaft window, that is, the Z value will correspond to the shaft window radius. The points of the edited object will need to be registered onto an available triangulation if they are required to lie on a triangulation surface.
• When generating triangulations for use in a shaft window, that is, for registering objects onto, use open strings. Using closed strings will generate a triangulation that doubles back on itself across the shaft window edges and may affect object registration.
• When manipulating points, do not create or move points outside the boundary of the surface triangulation. If such points exist, they will not be registered and as such will have the default Z value.
• When registering objects or points onto a triangulation in a shaft window, the standard 2D registration with interpolation works best. If required to do so, define a plane registration where the plane's Z value exceeds the radius of the shaft window.