Function computeSheetConsumption

For a given nesting compute the sheet consumption (floating-point value)

Note: All underlying nestings for a sheet node are (now) based on the same target boundary.

Note: If there is no valid nesting for the vertex submitted the consumption is undefined. Note: If there is no valid sheet for the vertex submitted the consumption is undefined.

For each sheet the consumption is computed as floating-point value v; v can be

= 1. if no modulus operation is applied to the sheet 0. if modulus operation is applied to the sheet Values > 1. occur for sheets with multiplicity > 1