Interface for a helper class used by com.yworks.yfiles.layout.hierarchic.incremental.HierarchicLayouterImpl during the node placement phase.
com.yworks.yfiles.layout.hierarchic.incremental.NodePlacer uses instances that implement this interface to determine the minimum distances between elements in one layer. The default implementation used in the com.yworks.yfiles.layout.hierarchic.incremental.HierarchicLayouterImpl is com.yworks.yfiles.layout.hierarchic.incremental.DefaultDrawingDistanceCalculator.
