it can be done with xpresso like this

12875_roundpointsposition.c4d.zip
two nulls with xpresso - one that will round the points of an object to whole numbers, one that will round to 1/4 values.

-Each setup so that anything dropped in as a child will have it's points set to rounded values.

-Works only on editable objects but won't break on parametric objects, just won't do anything.

-The 1/4 round is done by multiplying by 4 rounding then dividing by 4.

-If you really meant round up to the next highest number and not round down if less than .5 or up if more than .5 then the equations in the Formula nodes should use Ceil(Value1) not Round(Value1) (or ceil/round - not case sensitive)