Examples of the Use of Subtraction Solids
We would like to show here a few examples of the use of subtraction solids. Generally, before a subtraction solid is input it is important to consider in which layer it is to be inserted. This particularly affects the processing time required for the 3D model.
An example: We want to use a subtraction solid, for example a wedge for a ramp, to remove a part of the 3D terrain. In this case the solid should be input directly in the‘Environment’ layer. The default settings for the subtraction solid to only include elements in the current layer, mean that it intersects automatically with the terrain, and only the terrain. If the solid were to be input in the ground floor of the building instead, and only later the ‘Environment’ layer activated in the properties dialog of the subtraction solid, it would mean nevertheless that it initially intersects all elements of the ground floor. An action that is not necessary in this case and which only costs processing time.