Purpose
To unevaluate only the active node of the CSG tree.
Usage
First activate the node of the CSG tree to be unevaluated, then click the unevaluate button to activate it. The current active node of the tree will be unevaluated.
Comments
Evaluated parts lower in the tree will stay evaluated.
This function can be used when the left or right part of the current node is going to be transformed.
First select unevaluate, then transform the left or right part of the node. Activate the unevaluated node again and select evaluate. Only the unevaluated node will have to be evaluated (lower parts are still evaluated), which will save calculation time.
